From a56e05f1bd7c848159f4f979692d53b6f4472d82 Mon Sep 17 00:00:00 2001 From: Tobias Berger Date: Mon, 15 Nov 2021 23:20:38 +0100 Subject: [PATCH] more noise --- include/FastNoiseLite.h | 3124 +++++++++++++++++++++++++++++++++++++++ src/OpenSimplex2F.c | 4 +- src/main.c | 40 +- 3 files changed, 3161 insertions(+), 7 deletions(-) create mode 100644 include/FastNoiseLite.h diff --git a/include/FastNoiseLite.h b/include/FastNoiseLite.h new file mode 100644 index 0000000..767bfeb --- /dev/null +++ b/include/FastNoiseLite.h @@ -0,0 +1,3124 @@ +// MIT License +// +// Copyright(c) 2020 Jordan Peck (jordan.me2@gmail.com) +// Copyright(c) 2020 Contributors +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files(the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and / or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions : +// +// The above copyright notice and this permission notice shall be included in all +// copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +// SOFTWARE. +// +// .'',;:cldxkO00KKXXNNWWWNNXKOkxdollcc::::::;:::ccllloooolllllllllooollc:,'... ...........',;cldxkO000Okxdlc::;;;,,;;;::cclllllll +// ..',;:ldxO0KXXNNNNNNNNXXK0kxdolcc::::::;;;,,,,,,;;;;;;;;;;:::cclllllc:;'.... ...........',;:ldxO0KXXXK0Okxdolc::;;;;::cllodddddo +// ...',:loxO0KXNNNNNXXKK0Okxdolc::;::::::::;;;,,'''''.....''',;:clllllc:;,'............''''''''',;:loxO0KXNNNNNXK0Okxdollccccllodxxxxxxd +// ....';:ldkO0KXXXKK00Okxdolcc:;;;;;::cclllcc:;;,''..... ....',;clooddolcc:;;;;,,;;;;;::::;;;;;;:cloxk0KXNWWWWWWNXKK0Okxddoooddxxkkkkkxx +// .....';:ldxkOOOOOkxxdolcc:;;;,,,;;:cllooooolcc:;'... ..,:codxkkkxddooollloooooooollcc:::::clodkO0KXNWWWWWWNNXK00Okxxxxxxxxkkkkxxx +// . ....';:cloddddo___________,,,,;;:clooddddoolc:,... ..,:ldx__00OOOkkk___kkkkkkxxdollc::::cclodkO0KXXNNNNNNXXK0OOkxxxxxxxxxxxxddd +// .......',;:cccc:| |,,,;;:cclooddddoll:;'.. ..';cox| \KKK000| |KK00OOkxdocc___;::clldxxkO0KKKKK00Okkxdddddddddddddddoo +// .......'',,,,,''| ________|',,;;::cclloooooolc:;'......___:ldk| \KK000| |XKKK0Okxolc| |;;::cclodxxkkkkxxdoolllcclllooodddooooo +// ''......''''....| | ....'',,,,;;;::cclloooollc:;,''.'| |oxk| \OOO0| |KKK00Oxdoll|___|;;;;;::ccllllllcc::;;,,;;;:cclloooooooo +// ;;,''.......... | |_____',,;;;____:___cllo________.___| |___| \xkk| |KK_______ool___:::;________;;;_______...'',;;:ccclllloo +// c:;,''......... | |:::/ ' |lo/ | | \dx| |0/ \d| |cc/ |'/ \......',,;;:ccllo +// ol:;,'..........| _____|ll/ __ |o/ ______|____ ___| | \o| |/ ___ \| |o/ ______|/ ___ \ .......'',;:clo +// dlc;,...........| |::clooo| / | |x\___ \KXKKK0| |dol| |\ \| | | | | |d\___ \..| | / / ....',:cl +// xoc;'... .....'| |llodddd| \__| |_____\ \KKK0O| |lc:| |'\ | |___| | |_____\ \.| |_/___/... ...',;:c +// dlc;'... ....',;| |oddddddo\ | |Okkx| |::;| |..\ |\ /| | | \ |... ....',;:c +// ol:,'.......',:c|___|xxxddollc\_____,___|_________/ddoll|___|,,,|___|...\_____|:\ ______/l|___|_________/...\________|'........',;::cc +// c:;'.......';:codxxkkkkxxolc::;::clodxkOO0OOkkxdollc::;;,,''''',,,,''''''''''',,'''''',;:loxkkOOkxol:;,'''',,;:ccllcc:;,'''''',;::ccll +// ;,'.......',:codxkOO0OOkxdlc:;,,;;:cldxxkkxxdolc:;;,,''.....'',;;:::;;,,,'''''........,;cldkO0KK0Okdoc::;;::cloodddoolc:;;;;;::ccllooo +// .........',;:lodxOO0000Okdoc:,,',,;:clloddoolc:;,''.......'',;:clooollc:;;,,''.......',:ldkOKXNNXX0Oxdolllloddxxxxxxdolccccccllooodddd +// . .....';:cldxkO0000Okxol:;,''',,;::cccc:;,,'.......'',;:cldxxkkxxdolc:;;,'.......';coxOKXNWWWNXKOkxddddxxkkkkkkxdoollllooddxxxxkkk +// ....',;:codxkO000OOxdoc:;,''',,,;;;;,''.......',,;:clodkO00000Okxolc::;,,''..',;:ldxOKXNWWWNNK0OkkkkkkkkkkkxxddooooodxxkOOOOO000 +// ....',;;clodxkkOOOkkdolc:;,,,,,,,,'..........,;:clodxkO0KKXKK0Okxdolcc::;;,,,;;:codkO0XXNNNNXKK0OOOOOkkkkxxdoollloodxkO0KKKXXXXX +// +// VERSION: 1.0.1 +// https://github.com/Auburn/FastNoise + +// In *one* C or C++ file, use #define FNL_IMPL to generate implementation + +#ifndef FASTNOISELITE_H +#define FASTNOISELITE_H + +// Switch between using floats or doubles for input position +typedef float FNLfloat; +//typedef double FNLfloat; + +#if defined(__cplusplus) +extern "C" +{ +#endif + +#include +#include +#include +#include + + // Enums + typedef enum + { + FNL_NOISE_OPENSIMPLEX2, + FNL_NOISE_OPENSIMPLEX2S, + FNL_NOISE_CELLULAR, + FNL_NOISE_PERLIN, + FNL_NOISE_VALUE_CUBIC, + FNL_NOISE_VALUE + } fnl_noise_type; + + typedef enum + { + FNL_ROTATION_NONE, + FNL_ROTATION_IMPROVE_XY_PLANES, + FNL_ROTATION_IMPROVE_XZ_PLANES + } fnl_rotation_type_3d; + + typedef enum + { + FNL_FRACTAL_NONE, + FNL_FRACTAL_FBM, + FNL_FRACTAL_RIDGED, + FNL_FRACTAL_PINGPONG, + FNL_FRACTAL_DOMAIN_WARP_PROGRESSIVE, + FNL_FRACTAL_DOMAIN_WARP_INDEPENDENT + } fnl_fractal_type; + + typedef enum + { + FNL_CELLULAR_DISTANCE_EUCLIDEAN, + FNL_CELLULAR_DISTANCE_EUCLIDEANSQ, + FNL_CELLULAR_DISTANCE_MANHATTAN, + FNL_CELLULAR_DISTANCE_HYBRID + } fnl_cellular_distance_func; + + typedef enum + { + FNL_CELLULAR_RETURN_VALUE_CELLVALUE, + FNL_CELLULAR_RETURN_VALUE_DISTANCE, + FNL_CELLULAR_RETURN_VALUE_DISTANCE2, + FNL_CELLULAR_RETURN_VALUE_DISTANCE2ADD, + FNL_CELLULAR_RETURN_VALUE_DISTANCE2SUB, + FNL_CELLULAR_RETURN_VALUE_DISTANCE2MUL, + FNL_CELLULAR_RETURN_VALUE_DISTANCE2DIV, + } fnl_cellular_return_type; + + typedef enum + { + FNL_DOMAIN_WARP_OPENSIMPLEX2, + FNL_DOMAIN_WARP_OPENSIMPLEX2_REDUCED, + FNL_DOMAIN_WARP_BASICGRID + } fnl_domain_warp_type; + + /** + * Structure containing entire noise system state. + * @note Must only be created using fnlCreateState(optional: seed). To ensure defaults are set. + */ + typedef struct fnl_state + { + /** + * Seed used for all noise types. + * @remark Default: 1337 + */ + int seed; + + /** + * The frequency for all noise types. + * @remark Default: 0.01 + */ + float frequency; + + /** + * The noise algorithm to be used by GetNoise(...). + * @remark Default: FNL_NOISE_OPENSIMPLEX2 + */ + fnl_noise_type noise_type; + + /** + * Sets noise rotation type for 3D. + * @remark Default: FNL_ROTATION_NONE + */ + fnl_rotation_type_3d rotation_type_3d; + + /** + * The method used for combining octaves for all fractal noise types. + * @remark Default: None + * @remark FNL_FRACTAL_DOMAIN_WARP_... only effects fnlDomainWarp... + */ + fnl_fractal_type fractal_type; + + /** + * The octave count for all fractal noise types. + * @remark Default: 3 + */ + int octaves; + + /** + * The octave lacunarity for all fractal noise types. + * @remark Default: 2.0 + */ + float lacunarity; + + /** + * The octave gain for all fractal noise types. + * @remark Default: 0.5 + */ + float gain; + + /** + * The octave weighting for all none Domaain Warp fractal types. + * @remark Default: 0.0 + * @remark + */ + float weighted_strength; + + /** + * The strength of the fractal ping pong effect. + * @remark Default: 2.0 + */ + float ping_pong_strength; + + /** + * The distance function used in cellular noise calculations. + * @remark Default: FNL_CELLULAR_FUNC_DISTANCE + */ + fnl_cellular_distance_func cellular_distance_func; + + /** + * The cellular return type from cellular noise calculations. + * @remark Default: FNL_CELLULAR_RETURN_VALUE_EUCLIEANSQ + */ + fnl_cellular_return_type cellular_return_type; + + /** + * The maximum distance a cellular point can move from it's grid position. + * @remark Default: 1.0 + * @note Setting this higher than 1 will cause artifacts. + */ + float cellular_jitter_mod; + + /** + * The warp algorithm when using fnlDomainWarp... + * @remark Default: OpenSimplex2 + */ + fnl_domain_warp_type domain_warp_type; + + /** + * The maximum warp distance from original position when using fnlDomainWarp... + * @remark Default: 1.0 + */ + float domain_warp_amp; + } fnl_state; + + /** + * Creates a noise state with default values. + * @param seed Optionally set the state seed. + */ + fnl_state fnlCreateState(); + + /** + * 2D noise at given position using the state settings + * @returns Noise output bounded between -1 and 1. + */ + float fnlGetNoise2D(fnl_state *state, FNLfloat x, FNLfloat y); + + /** + * 3D noise at given position using the state settings + * @returns Noise output bounded between -1 and 1. + */ + float fnlGetNoise3D(fnl_state *state, FNLfloat x, FNLfloat y, FNLfloat z); + + /** + * 2D warps the input position using current domain warp settings. + * + * Example usage with fnlGetNoise2D: + * ``` + * fnlDomainWarp2D(&state, &x, &y); + * noise = fnlGetNoise2D(&state, x, y); + * ``` + */ + void fnlDomainWarp2D(fnl_state *state, FNLfloat *x, FNLfloat *y); + + /** + * 3D warps the input position using current domain warp settings. + * + * Example usage with fnlGetNoise3D: + * ``` + * fnlDomainWarp3D(&state, &x, &y, &z); + * noise = fnlGetNoise3D(&state, x, y, z); + * ``` + */ + void fnlDomainWarp3D(fnl_state *state, FNLfloat *x, FNLfloat *y, FNLfloat *z); + + // ==================== + // Below this line is the implementation + // ==================== + +#if defined(FNL_IMPL) + + // Constants + + static const float GRADIENTS_2D[] = + { + 0.130526192220052f, + 0.99144486137381f, + 0.38268343236509f, + 0.923879532511287f, + 0.608761429008721f, + 0.793353340291235f, + 0.793353340291235f, + 0.608761429008721f, + 0.923879532511287f, + 0.38268343236509f, + 0.99144486137381f, + 0.130526192220051f, + 0.99144486137381f, + -0.130526192220051f, + 0.923879532511287f, + -0.38268343236509f, + 0.793353340291235f, + -0.60876142900872f, + 0.608761429008721f, + -0.793353340291235f, + 0.38268343236509f, + -0.923879532511287f, + 0.130526192220052f, + -0.99144486137381f, + -0.130526192220052f, + -0.99144486137381f, + -0.38268343236509f, + -0.923879532511287f, + -0.608761429008721f, + -0.793353340291235f, + -0.793353340291235f, + -0.608761429008721f, + -0.923879532511287f, + -0.38268343236509f, + -0.99144486137381f, + -0.130526192220052f, + -0.99144486137381f, + 0.130526192220051f, + -0.923879532511287f, + 0.38268343236509f, + -0.793353340291235f, + 0.608761429008721f, + -0.608761429008721f, + 0.793353340291235f, + -0.38268343236509f, + 0.923879532511287f, + -0.130526192220052f, + 0.99144486137381f, + 0.130526192220052f, + 0.99144486137381f, + 0.38268343236509f, + 0.923879532511287f, + 0.608761429008721f, + 0.793353340291235f, + 0.793353340291235f, + 0.608761429008721f, + 0.923879532511287f, + 0.38268343236509f, + 0.99144486137381f, + 0.130526192220051f, + 0.99144486137381f, + -0.130526192220051f, + 0.923879532511287f, + -0.38268343236509f, + 0.793353340291235f, + -0.60876142900872f, + 0.608761429008721f, + -0.793353340291235f, + 0.38268343236509f, + -0.923879532511287f, + 0.130526192220052f, + -0.99144486137381f, + -0.130526192220052f, + -0.99144486137381f, + -0.38268343236509f, + -0.923879532511287f, + -0.608761429008721f, + -0.793353340291235f, + -0.793353340291235f, + -0.608761429008721f, + -0.923879532511287f, + -0.38268343236509f, + -0.99144486137381f, + -0.130526192220052f, + -0.99144486137381f, + 0.130526192220051f, + -0.923879532511287f, + 0.38268343236509f, + -0.793353340291235f, + 0.608761429008721f, + -0.608761429008721f, + 0.793353340291235f, + -0.38268343236509f, + 0.923879532511287f, + -0.130526192220052f, + 0.99144486137381f, + 0.130526192220052f, + 0.99144486137381f, + 0.38268343236509f, + 0.923879532511287f, + 0.608761429008721f, + 0.793353340291235f, + 0.793353340291235f, + 0.608761429008721f, + 0.923879532511287f, + 0.38268343236509f, + 0.99144486137381f, + 0.130526192220051f, + 0.99144486137381f, + -0.130526192220051f, + 0.923879532511287f, + -0.38268343236509f, + 0.793353340291235f, + -0.60876142900872f, + 0.608761429008721f, + -0.793353340291235f, + 0.38268343236509f, + -0.923879532511287f, + 0.130526192220052f, + -0.99144486137381f, + -0.130526192220052f, + -0.99144486137381f, + -0.38268343236509f, + -0.923879532511287f, + -0.608761429008721f, + -0.793353340291235f, + -0.793353340291235f, + -0.608761429008721f, + -0.923879532511287f, + -0.38268343236509f, + -0.99144486137381f, + -0.130526192220052f, + -0.99144486137381f, + 0.130526192220051f, + -0.923879532511287f, + 0.38268343236509f, + -0.793353340291235f, + 0.608761429008721f, + -0.608761429008721f, + 0.793353340291235f, + -0.38268343236509f, + 0.923879532511287f, + -0.130526192220052f, + 0.99144486137381f, + 0.130526192220052f, + 0.99144486137381f, + 0.38268343236509f, + 0.923879532511287f, + 0.608761429008721f, + 0.793353340291235f, + 0.793353340291235f, + 0.608761429008721f, + 0.923879532511287f, + 0.38268343236509f, + 0.99144486137381f, + 0.130526192220051f, + 0.99144486137381f, + -0.130526192220051f, + 0.923879532511287f, + -0.38268343236509f, + 0.793353340291235f, + -0.60876142900872f, + 0.608761429008721f, + -0.793353340291235f, + 0.38268343236509f, + -0.923879532511287f, + 0.130526192220052f, + -0.99144486137381f, + -0.130526192220052f, + -0.99144486137381f, + -0.38268343236509f, + -0.923879532511287f, + -0.608761429008721f, + -0.793353340291235f, + -0.793353340291235f, + -0.608761429008721f, + -0.923879532511287f, + -0.38268343236509f, + -0.99144486137381f, + -0.130526192220052f, + -0.99144486137381f, + 0.130526192220051f, + -0.923879532511287f, + 0.38268343236509f, + -0.793353340291235f, + 0.608761429008721f, + -0.608761429008721f, + 0.793353340291235f, + -0.38268343236509f, + 0.923879532511287f, + -0.130526192220052f, + 0.99144486137381f, + 0.130526192220052f, + 0.99144486137381f, + 0.38268343236509f, + 0.923879532511287f, + 0.608761429008721f, + 0.793353340291235f, + 0.793353340291235f, + 0.608761429008721f, + 0.923879532511287f, + 0.38268343236509f, + 0.99144486137381f, + 0.130526192220051f, + 0.99144486137381f, + -0.130526192220051f, + 0.923879532511287f, + -0.38268343236509f, + 0.793353340291235f, + -0.60876142900872f, + 0.608761429008721f, + -0.793353340291235f, + 0.38268343236509f, + -0.923879532511287f, + 0.130526192220052f, + -0.99144486137381f, + -0.130526192220052f, + -0.99144486137381f, + -0.38268343236509f, + -0.923879532511287f, + -0.608761429008721f, + -0.793353340291235f, + -0.793353340291235f, + -0.608761429008721f, + -0.923879532511287f, + -0.38268343236509f, + -0.99144486137381f, + -0.130526192220052f, + -0.99144486137381f, + 0.130526192220051f, + -0.923879532511287f, + 0.38268343236509f, + -0.793353340291235f, + 0.608761429008721f, + -0.608761429008721f, + 0.793353340291235f, + -0.38268343236509f, + 0.923879532511287f, + -0.130526192220052f, + 0.99144486137381f, + 0.38268343236509f, + 0.923879532511287f, + 0.923879532511287f, + 0.38268343236509f, + 0.923879532511287f, + -0.38268343236509f, + 0.38268343236509f, + -0.923879532511287f, + -0.38268343236509f, + -0.923879532511287f, + -0.923879532511287f, + -0.38268343236509f, + -0.923879532511287f, + 0.38268343236509f, + -0.38268343236509f, + 0.923879532511287f, + }; + + static const float RAND_VECS_2D[] = + { + -0.2700222198f, + -0.9628540911f, + 0.3863092627f, + -0.9223693152f, + 0.04444859006f, + -0.999011673f, + -0.5992523158f, + -0.8005602176f, + -0.7819280288f, + 0.6233687174f, + 0.9464672271f, + 0.3227999196f, + -0.6514146797f, + -0.7587218957f, + 0.9378472289f, + 0.347048376f, + -0.8497875957f, + -0.5271252623f, + -0.879042592f, + 0.4767432447f, + -0.892300288f, + -0.4514423508f, + -0.379844434f, + -0.9250503802f, + -0.9951650832f, + 0.0982163789f, + 0.7724397808f, + -0.6350880136f, + 0.7573283322f, + -0.6530343002f, + -0.9928004525f, + -0.119780055f, + -0.0532665713f, + 0.9985803285f, + 0.9754253726f, + -0.2203300762f, + -0.7665018163f, + 0.6422421394f, + 0.991636706f, + 0.1290606184f, + -0.994696838f, + 0.1028503788f, + -0.5379205513f, + -0.84299554f, + 0.5022815471f, + 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float _fnlFastMin(float x, float y) { return x < y ? x : y; } + + static inline float _fnlFastMax(float x, float y) { return x > y ? x : y; } + + static inline float _fnlFastAbs(float f) { return f < 0 ? -f : f; } + + static inline float _fnlCasti32Tof32(int i) + { + union + { + float f; + int32_t i; + } u; + u.i = i; + return u.f; + } + + static inline int _fnlCastf32Toi32(float f) + { + union + { + float f; + int32_t i; + } u; + u.f = f; + return u.i; + } + + static inline float _fnlInvSqrt(float a) + { + float xhalf = 0.5f * a; + a = _fnlCasti32Tof32(0x5f3759df - (_fnlCastf32Toi32(a) >> 1)); + a = a * (1.5f - xhalf * a * a); + return a; + } + + // NOTE: If your language does not support this method (seen above), then simply use the native sqrt function. + static inline float _fnlFastSqrt(float a) { return a * _fnlInvSqrt(a); } + + static inline int _fnlFastFloor(FNLfloat f) { return (f >= 0 ? (int)f : (int)f - 1); } + + static inline int _fnlFastRound(FNLfloat f) { return (f >= 0) ? (int)(f + 0.5f) : (int)(f - 0.5f); } + + static inline float _fnlLerp(float a, float b, float t) { return a + t * (b - a); } + + static inline float _fnlInterpHermite(float t) { return t * t * (3 - 2 * t); } + + static inline float _fnlInterpQuintic(float t) { return t * t * t * (t * (t * 6 - 15) + 10); } + + static inline float _fnlCubicLerp(float a, float b, float c, float d, float t) + { + float p = (d - c) - (a - b); + return t * t * t * p + t * t * ((a - b) - p) + t * (c - a) + b; + } + + static inline float _fnlPingPong(float t) + { + t -= (int)(t * 0.5f) * 2; + return t < 1 ? t : 2 - t; + } + + static float _fnlCalculateFractalBounding(fnl_state *state) + { + float gain = _fnlFastAbs(state->gain); + float amp = gain; + float ampFractal = 1.0f; + for (int i = 1; i < state->octaves; i++) + { + ampFractal += amp; + amp *= gain; + } + return 1.0f / ampFractal; + } + + // Hashing + + static const int PRIME_X = 501125321; + static const int PRIME_Y = 1136930381; + static const int PRIME_Z = 1720413743; + + static inline int _fnlHash2D(int seed, int xPrimed, int yPrimed) + { + int hash = seed ^ xPrimed ^ yPrimed; + + hash *= 0x27d4eb2d; + return hash; + } + + static inline int _fnlHash3D(int seed, int xPrimed, int yPrimed, int zPrimed) + { + int hash = seed ^ xPrimed ^ yPrimed ^ zPrimed; + + hash *= 0x27d4eb2d; + return hash; + } + + static inline float _fnlValCoord2D(int seed, int xPrimed, int yPrimed) + { + int hash = _fnlHash2D(seed, xPrimed, yPrimed); + hash *= hash; + hash ^= hash << 19; + return hash * (1 / 2147483648.0f); + } + + static inline float _fnlValCoord3D(int seed, int xPrimed, int yPrimed, int zPrimed) + { + int hash = _fnlHash3D(seed, xPrimed, yPrimed, zPrimed); + hash *= hash; + hash ^= hash << 19; + return hash * (1 / 2147483648.0f); + } + + static inline float _fnlGradCoord2D(int seed, int xPrimed, int yPrimed, float xd, float yd) + { + int hash = _fnlHash2D(seed, xPrimed, yPrimed); + hash ^= hash >> 15; + hash &= 127 << 1; + return xd * GRADIENTS_2D[hash] + yd * GRADIENTS_2D[hash | 1]; + } + + static inline float _fnlGradCoord3D(int seed, int xPrimed, int yPrimed, int zPrimed, float xd, float yd, float zd) + { + int hash = _fnlHash3D(seed, xPrimed, yPrimed, zPrimed); + hash ^= hash >> 15; + hash &= 63 << 2; + return xd * GRADIENTS_3D[hash] + yd * GRADIENTS_3D[hash | 1] + zd * GRADIENTS_3D[hash | 2]; + } + + static inline void _fnlGradCoordOut2D(int seed, int xPrimed, int yPrimed, float *xo, float *yo) + { + int hash = _fnlHash2D(seed, xPrimed, yPrimed) & (255 << 1); + + *xo = RAND_VECS_2D[hash]; + *yo = RAND_VECS_2D[hash | 1]; + } + + static inline void _fnlGradCoordOut3D(int seed, int xPrimed, int yPrimed, int zPrimed, float *xo, float *yo, float *zo) + { + int hash = _fnlHash3D(seed, xPrimed, yPrimed, zPrimed) & (255 << 2); + + *xo = RAND_VECS_3D[hash]; + *yo = RAND_VECS_3D[hash | 1]; + *zo = RAND_VECS_3D[hash | 2]; + } + + static inline void _fnlGradCoordDual2D(int seed, int xPrimed, int yPrimed, float xd, float yd, float *xo, float *yo) + { + int hash = _fnlHash2D(seed, xPrimed, yPrimed); + int index1 = hash & (127 << 1); + int index2 = (hash >> 7) & (255 << 1); + + float xg = GRADIENTS_2D[index1]; + float yg = GRADIENTS_2D[index1 | 1]; + float value = xd * xg + yd * yg; + + float xgo = RAND_VECS_2D[index2]; + float ygo = RAND_VECS_2D[index2 | 1]; + + *xo = value * xgo; + *yo = value * ygo; + } + + static inline void _fnlGradCoordDual3D(int seed, int xPrimed, int yPrimed, int zPrimed, float xd, float yd, float zd, float *xo, float *yo, float *zo) + { + int hash = _fnlHash3D(seed, xPrimed, yPrimed, zPrimed); + int index1 = hash & (63 << 2); + int index2 = (hash >> 6) & (255 << 2); + + float xg = GRADIENTS_3D[index1]; + float yg = GRADIENTS_3D[index1 | 1]; + float zg = GRADIENTS_3D[index1 | 2]; + float value = xd * xg + yd * yg + zd * zg; + + float xgo = RAND_VECS_3D[index2]; + float ygo = RAND_VECS_3D[index2 | 1]; + float zgo = RAND_VECS_3D[index2 | 2]; + + *xo = value * xgo; + *yo = value * ygo; + *zo = value * zgo; + } + + // Generic Noise Gen + + static float _fnlSingleSimplex2D(int seed, FNLfloat x, FNLfloat y); + static float _fnlSingleOpenSimplex23D(int seed, FNLfloat x, FNLfloat y, FNLfloat z); + static float _fnlSingleOpenSimplex2S2D(int seed, FNLfloat x, FNLfloat y); + static float _fnlSingleOpenSimplex2S3D(int seed, FNLfloat x, FNLfloat y, FNLfloat z); + static float _fnlSingleCellular2D(fnl_state *state, int seed, FNLfloat x, FNLfloat y); + static float _fnlSingleCellular3D(fnl_state *state, int seed, FNLfloat x, FNLfloat y, FNLfloat z); + static float _fnlSinglePerlin2D(int seed, FNLfloat x, FNLfloat y); + static float _fnlSinglePerlin3D(int seed, FNLfloat x, FNLfloat y, FNLfloat z); + static float _fnlSingleValueCubic2D(int seed, FNLfloat x, FNLfloat y); + static float _fnlSingleValueCubic3D(int seed, FNLfloat x, FNLfloat y, FNLfloat z); + static float _fnlSingleValue2D(int seed, FNLfloat x, FNLfloat y); + static float _fnlSingleValue3D(int seed, FNLfloat x, FNLfloat y, FNLfloat z); + + static float _fnlGenNoiseSingle2D(fnl_state *state, int seed, FNLfloat x, FNLfloat y) + { + switch (state->noise_type) + { + case FNL_NOISE_OPENSIMPLEX2: + return _fnlSingleSimplex2D(seed, x, y); + case FNL_NOISE_OPENSIMPLEX2S: + return _fnlSingleOpenSimplex2S2D(seed, x, y); + case FNL_NOISE_CELLULAR: + return _fnlSingleCellular2D(state, seed, x, y); + case FNL_NOISE_PERLIN: + return _fnlSinglePerlin2D(seed, x, y); + case FNL_NOISE_VALUE_CUBIC: + return _fnlSingleValueCubic2D(seed, x, y); + case FNL_NOISE_VALUE: + return _fnlSingleValue2D(seed, x, y); + default: + return 0; + } + } + + static float _fnlGenNoiseSingle3D(fnl_state *state, int seed, FNLfloat x, FNLfloat y, FNLfloat z) + { + switch (state->noise_type) + { + case FNL_NOISE_OPENSIMPLEX2: + return _fnlSingleOpenSimplex23D(seed, x, y, z); + case FNL_NOISE_OPENSIMPLEX2S: + return _fnlSingleOpenSimplex2S3D(seed, x, y, z); + case FNL_NOISE_CELLULAR: + return _fnlSingleCellular3D(state, seed, x, y, z); + case FNL_NOISE_PERLIN: + return _fnlSinglePerlin3D(seed, x, y, z); + case FNL_NOISE_VALUE_CUBIC: + return _fnlSingleValueCubic3D(seed, x, y, z); + case FNL_NOISE_VALUE: + return _fnlSingleValue3D(seed, x, y, z); + default: + return 0; + } + } + + // Noise Coordinate Transforms (frequency, and possible skew or rotation) + + static void _fnlTransformNoiseCoordinate2D(fnl_state *state, FNLfloat *x, FNLfloat *y) + { + *x *= state->frequency; + *y *= state->frequency; + + switch (state->noise_type) + { + case FNL_NOISE_OPENSIMPLEX2: + case FNL_NOISE_OPENSIMPLEX2S: + { + const FNLfloat SQRT3 = (FNLfloat)1.7320508075688772935274463415059; + const FNLfloat F2 = 0.5f * (SQRT3 - 1); + FNLfloat t = (*x + *y) * F2; + *x += t; + *y += t; + } + break; + default: + break; + } + } + + static void _fnlTransformNoiseCoordinate3D(fnl_state *state, FNLfloat *x, FNLfloat *y, FNLfloat *z) + { + *x *= state->frequency; + *y *= state->frequency; + *z *= state->frequency; + + switch (state->rotation_type_3d) + { + case FNL_ROTATION_IMPROVE_XY_PLANES: + { + FNLfloat xy = *x + *y; + FNLfloat s2 = xy * -(FNLfloat)0.211324865405187; + *z *= (FNLfloat)0.577350269189626; + *x += s2 - *z; + *y = *y + s2 - *z; + *z += xy * (FNLfloat)0.577350269189626; + } + break; + case FNL_ROTATION_IMPROVE_XZ_PLANES: + { + FNLfloat xz = *x + *z; + FNLfloat s2 = xz * -(FNLfloat)0.211324865405187; + *y *= (FNLfloat)0.577350269189626; + *x += s2 - *y; + *z += s2 - *y; + *y += xz * (FNLfloat)0.577350269189626; + } + break; + default: + switch (state->noise_type) + { + case FNL_NOISE_OPENSIMPLEX2: + case FNL_NOISE_OPENSIMPLEX2S: + { + const FNLfloat R3 = (FNLfloat)(2.0 / 3.0); + FNLfloat r = (*x + *y + *z) * R3; // Rotation, not skew + *x = r - *x; + *y = r - *y; + *z = r - *z; + } + break; + default: + break; + } + } + } + + // Domain Warp Coordinate Transforms + + static void _fnlTransformDomainWarpCoordinate2D(fnl_state *state, FNLfloat *x, FNLfloat *y) + { + switch (state->domain_warp_type) + { + case FNL_DOMAIN_WARP_OPENSIMPLEX2: + case FNL_DOMAIN_WARP_OPENSIMPLEX2_REDUCED: + { + const FNLfloat SQRT3 = (FNLfloat)1.7320508075688772935274463415059; + const FNLfloat F2 = 0.5f * (SQRT3 - 1); + FNLfloat t = (*x + *y) * F2; + *x += t; + *y += t; + } + break; + default: + break; + } + } + + static void _fnlTransformDomainWarpCoordinate3D(fnl_state *state, FNLfloat *x, FNLfloat *y, FNLfloat *z) + { + switch (state->rotation_type_3d) + { + case FNL_ROTATION_IMPROVE_XY_PLANES: + { + FNLfloat xy = *x + *y; + FNLfloat s2 = xy * -(FNLfloat)0.211324865405187; + *z *= (FNLfloat)0.577350269189626; + *x += s2 - *z; + *y = *y + s2 - *z; + *z += xy * (FNLfloat)0.577350269189626; + } + break; + case FNL_ROTATION_IMPROVE_XZ_PLANES: + { + FNLfloat xz = *x + *z; + FNLfloat s2 = xz * -(FNLfloat)0.211324865405187; + *y *= (FNLfloat)0.577350269189626; + *x += s2 - *y; + *z += s2 - *y; + *y += xz * (FNLfloat)0.577350269189626; + } + break; + default: + switch (state->domain_warp_type) + { + case FNL_DOMAIN_WARP_OPENSIMPLEX2: + case FNL_DOMAIN_WARP_OPENSIMPLEX2_REDUCED: + { + const FNLfloat R3 = (FNLfloat)(2.0 / 3.0); + FNLfloat r = (*x + *y + *z) * R3; // Rotation, not skew + *x = r - *x; + *y = r - *y; + *z = r - *z; + } + break; + default: + break; + } + } + } + + // Fractal FBm + static float _fnlGenFractalFBM2D(fnl_state *state, FNLfloat x, FNLfloat y) + { + int seed = state->seed; + float sum = 0; + float amp = _fnlCalculateFractalBounding(state); + + for (int i = 0; i < state->octaves; i++) + { + float noise = _fnlGenNoiseSingle2D(state, seed++, x, y); + sum += noise * amp; + amp *= _fnlLerp(1.0f, _fnlFastMin(noise + 1, 2) * 0.5f, state->weighted_strength); + + x *= state->lacunarity; + y *= state->lacunarity; + amp *= state->gain; + } + + return sum; + } + + static float _fnlGenFractalFBM3D(fnl_state *state, FNLfloat x, FNLfloat y, FNLfloat z) + { + int seed = state->seed; + float sum = 0; + float amp = _fnlCalculateFractalBounding(state); + + for (int i = 0; i < state->octaves; i++) + { + float noise = _fnlGenNoiseSingle3D(state, seed++, x, y, z); + sum += noise * amp; + amp *= _fnlLerp(1.0f, (noise + 1) * 0.5f, state->weighted_strength); + + x *= state->lacunarity; + y *= state->lacunarity; + z *= state->lacunarity; + amp *= state->gain; + } + + return sum; + } + + // Fractal Ridged + + static float _fnlGenFractalRidged2D(fnl_state *state, FNLfloat x, FNLfloat y) + { + int seed = state->seed; + float sum = 0; + float amp = _fnlCalculateFractalBounding(state); + + for (int i = 0; i < state->octaves; i++) + { + float noise = _fnlFastAbs(_fnlGenNoiseSingle2D(state, seed++, x, y)); + sum += (noise * -2 + 1) * amp; + amp *= _fnlLerp(1.0f, 1 - noise, state->weighted_strength); + + x *= state->lacunarity; + y *= state->lacunarity; + amp *= state->gain; + } + + return sum; + } + + static float _fnlGenFractalRidged3D(fnl_state *state, FNLfloat x, FNLfloat y, FNLfloat z) + { + int seed = state->seed; + float sum = 0; + float amp = _fnlCalculateFractalBounding(state); + + for (int i = 0; i < state->octaves; i++) + { + float noise = _fnlFastAbs(_fnlGenNoiseSingle3D(state, seed++, x, y, z)); + sum += (noise * -2 + 1) * amp; + amp *= _fnlLerp(1.0f, 1 - noise, state->weighted_strength); + + x *= state->lacunarity; + y *= state->lacunarity; + z *= state->lacunarity; + amp *= state->gain; + } + + return sum; + } + + // Fractal PingPong + + static float _fnlGenFractalPingPong2D(fnl_state *state, FNLfloat x, FNLfloat y) + { + int seed = state->seed; + float sum = 0; + float amp = _fnlCalculateFractalBounding(state); + + for (int i = 0; i < state->octaves; i++) + { + float noise = _fnlPingPong((_fnlGenNoiseSingle2D(state, seed++, x, y) + 1) * state->ping_pong_strength); + sum += (noise - 0.5f) * 2 * amp; + amp *= _fnlLerp(1.0f, noise, state->weighted_strength); + + x *= state->lacunarity; + y *= state->lacunarity; + amp *= state->gain; + } + + return sum; + } + + static float _fnlGenFractalPingPong3D(fnl_state *state, FNLfloat x, FNLfloat y, FNLfloat z) + { + int seed = state->seed; + float sum = 0; + float amp = _fnlCalculateFractalBounding(state); + + for (int i = 0; i < state->octaves; i++) + { + float noise = _fnlPingPong((_fnlGenNoiseSingle3D(state, seed++, x, y, z) + 1) * state->ping_pong_strength); + sum += (noise - 0.5f) * 2 * amp; + amp *= _fnlLerp(1.0f, noise, state->weighted_strength); + + x *= state->lacunarity; + y *= state->lacunarity; + z *= state->lacunarity; + amp *= state->gain; + } + + return sum; + } + + // Simplex/OpenSimplex2 Noise + + static float _fnlSingleSimplex2D(int seed, FNLfloat x, FNLfloat y) + { + // 2D OpenSimplex2 case uses the same algorithm as ordinary Simplex. + + const float SQRT3 = 1.7320508075688772935274463415059f; + const float G2 = (3 - SQRT3) / 6; + + /* + * --- Skew moved to TransformNoiseCoordinate method --- + * const FNLfloat F2 = 0.5f * (SQRT3 - 1); + * FNLfloat s = (x + y) * F2; + * x += s; y += s; + */ + + int i = _fnlFastFloor(x); + int j = _fnlFastFloor(y); + float xi = (float)(x - i); + float yi = (float)(y - j); + + float t = (xi + yi) * G2; + float x0 = (float)(xi - t); + float y0 = (float)(yi - t); + + i *= PRIME_X; + j *= PRIME_Y; + + float n0, n1, n2; + + float a = 0.5f - x0 * x0 - y0 * y0; + if (a <= 0) + n0 = 0; + else + { + n0 = (a * a) * (a * a) * _fnlGradCoord2D(seed, i, j, x0, y0); + } + + float c = (float)(2 * (1 - 2 * G2) * (1 / G2 - 2)) * t + ((float)(-2 * (1 - 2 * G2) * (1 - 2 * G2)) + a); + if (c <= 0) + n2 = 0; + else + { + float x2 = x0 + (2 * (float)G2 - 1); + float y2 = y0 + (2 * (float)G2 - 1); + n2 = (c * c) * (c * c) * _fnlGradCoord2D(seed, i + PRIME_X, j + PRIME_Y, x2, y2); + } + + if (y0 > x0) + { + float x1 = x0 + (float)G2; + float y1 = y0 + ((float)G2 - 1); + float b = 0.5f - x1 * x1 - y1 * y1; + if (b <= 0) + n1 = 0; + else + { + n1 = (b * b) * (b * b) * _fnlGradCoord2D(seed, i, j + PRIME_Y, x1, y1); + } + } + else + { + float x1 = x0 + ((float)G2 - 1); + float y1 = y0 + (float)G2; + float b = 0.5f - x1 * x1 - y1 * y1; + if (b <= 0) + n1 = 0; + else + { + n1 = (b * b) * (b * b) * _fnlGradCoord2D(seed, i + PRIME_X, j, x1, y1); + } + } + + return (n0 + n1 + n2) * 99.83685446303647f; + } + + static float _fnlSingleOpenSimplex23D(int seed, FNLfloat x, FNLfloat y, FNLfloat z) + { + // 3D OpenSimplex2 case uses two offset rotated cube grids. + + /* + * --- Rotation moved to TransformNoiseCoordinate method --- + * const FNLfloat R3 = (FNLfloat)(2.0 / 3.0); + * FNLfloat r = (x + y + z) * R3; // Rotation, not skew + * x = r - x; y = r - y; z = r - z; + */ + + int i = _fnlFastRound(x); + int j = _fnlFastRound(y); + int k = _fnlFastRound(z); + float x0 = (float)(x - i); + float y0 = (float)(y - j); + float z0 = (float)(z - k); + + int xNSign = (int)(-1.0f - x0) | 1; + int yNSign = (int)(-1.0f - y0) | 1; + int zNSign = (int)(-1.0f - z0) | 1; + + float ax0 = xNSign * -x0; + float ay0 = yNSign * -y0; + float az0 = zNSign * -z0; + + i *= PRIME_X; + j *= PRIME_Y; + k *= PRIME_Z; + + float value = 0; + float a = (0.6f - x0 * x0) - (y0 * y0 + z0 * z0); + + for (int l = 0;; l++) + { + if (a > 0) + { + value += (a * a) * (a * a) * _fnlGradCoord3D(seed, i, j, k, x0, y0, z0); + } + + float b = a + 1; + int i1 = i; + int j1 = j; + int k1 = k; + float x1 = x0; + float y1 = y0; + float z1 = z0; + if (ax0 >= ay0 && ax0 >= az0) + { + x1 += xNSign; + b -= xNSign * 2 * x1; + i1 -= xNSign * PRIME_X; + } + else if (ay0 > ax0 && ay0 >= az0) + { + y1 += yNSign; + b -= yNSign * 2 * y1; + j1 -= yNSign * PRIME_Y; + } + else + { + z1 += zNSign; + b -= zNSign * 2 * z1; + k1 -= zNSign * PRIME_Z; + } + + if (b > 0) + { + value += (b * b) * (b * b) * _fnlGradCoord3D(seed, i1, j1, k1, x1, y1, z1); + } + + if (l == 1) + break; + + ax0 = 0.5f - ax0; + ay0 = 0.5f - ay0; + az0 = 0.5f - az0; + + x0 = xNSign * ax0; + y0 = yNSign * ay0; + z0 = zNSign * az0; + + a += (0.75f - ax0) - (ay0 + az0); + + i += (xNSign >> 1) & PRIME_X; + j += (yNSign >> 1) & PRIME_Y; + k += (zNSign >> 1) & PRIME_Z; + + xNSign = -xNSign; + yNSign = -yNSign; + zNSign = -zNSign; + + seed = ~seed; + } + + return value * 32.69428253173828125f; + } + + // OpenSimplex2S Noise + + static float _fnlSingleOpenSimplex2S2D(int seed, FNLfloat x, FNLfloat y) + { + // 2D OpenSimplex2S case is a modified 2D simplex noise. + + const FNLfloat SQRT3 = (FNLfloat)1.7320508075688772935274463415059; + const FNLfloat G2 = (3 - SQRT3) / 6; + + /* + * --- Skew moved to TransformNoiseCoordinate method --- + * const FNLfloat F2 = 0.5f * (SQRT3 - 1); + * FNLfloat s = (x + y) * F2; + * x += s; y += s; + */ + + int i = _fnlFastFloor(x); + int j = _fnlFastFloor(y); + float xi = (float)(x - i); + float yi = (float)(y - j); + + i *= PRIME_X; + j *= PRIME_Y; + int i1 = i + PRIME_X; + int j1 = j + PRIME_Y; + + float t = (xi + yi) * (float)G2; + float x0 = xi - t; + float y0 = yi - t; + + float a0 = (2.0f / 3.0f) - x0 * x0 - y0 * y0; + float value = (a0 * a0) * (a0 * a0) * _fnlGradCoord2D(seed, i, j, x0, y0); + + float a1 = (float)(2 * (1 - 2 * G2) * (1 / G2 - 2)) * t + ((float)(-2 * (1 - 2 * G2) * (1 - 2 * G2)) + a0); + float x1 = x0 - (float)(1 - 2 * G2); + float y1 = y0 - (float)(1 - 2 * G2); + value += (a1 * a1) * (a1 * a1) * _fnlGradCoord2D(seed, i1, j1, x1, y1); + + // Nested conditionals were faster than compact bit logic/arithmetic. + float xmyi = xi - yi; + if (t > G2) + { + if (xi + xmyi > 1) + { + float x2 = x0 + (float)(3 * G2 - 2); + float y2 = y0 + (float)(3 * G2 - 1); + float a2 = (2.0f / 3.0f) - x2 * x2 - y2 * y2; + if (a2 > 0) + { + value += (a2 * a2) * (a2 * a2) * _fnlGradCoord2D(seed, i + (PRIME_X << 1), j + PRIME_Y, x2, y2); + } + } + else + { + float x2 = x0 + (float)G2; + float y2 = y0 + (float)(G2 - 1); + float a2 = (2.0f / 3.0f) - x2 * x2 - y2 * y2; + if (a2 > 0) + { + value += (a2 * a2) * (a2 * a2) * _fnlGradCoord2D(seed, i, j + PRIME_Y, x2, y2); + } + } + + if (yi - xmyi > 1) + { + float x3 = x0 + (float)(3 * G2 - 1); + float y3 = y0 + (float)(3 * G2 - 2); + float a3 = (2.0f / 3.0f) - x3 * x3 - y3 * y3; + if (a3 > 0) + { + value += (a3 * a3) * (a3 * a3) * _fnlGradCoord2D(seed, i + PRIME_X, j + (PRIME_Y << 1), x3, y3); + } + } + else + { + float x3 = x0 + (float)(G2 - 1); + float y3 = y0 + (float)G2; + float a3 = (2.0f / 3.0f) - x3 * x3 - y3 * y3; + if (a3 > 0) + { + value += (a3 * a3) * (a3 * a3) * _fnlGradCoord2D(seed, i + PRIME_X, j, x3, y3); + } + } + } + else + { + if (xi + xmyi < 0) + { + float x2 = x0 + (float)(1 - G2); + float y2 = y0 - (float)G2; + float a2 = (2.0f / 3.0f) - x2 * x2 - y2 * y2; + if (a2 > 0) + { + value += (a2 * a2) * (a2 * a2) * _fnlGradCoord2D(seed, i - PRIME_X, j, x2, y2); + } + } + else + { + float x2 = x0 + (float)(G2 - 1); + float y2 = y0 + (float)G2; + float a2 = (2.0f / 3.0f) - x2 * x2 - y2 * y2; + if (a2 > 0) + { + value += (a2 * a2) * (a2 * a2) * _fnlGradCoord2D(seed, i + PRIME_X, j, x2, y2); + } + } + + if (yi < xmyi) + { + float x2 = x0 - (float)G2; + float y2 = y0 - (float)(G2 - 1); + float a2 = (2.0f / 3.0f) - x2 * x2 - y2 * y2; + if (a2 > 0) + { + value += (a2 * a2) * (a2 * a2) * _fnlGradCoord2D(seed, i, j - PRIME_Y, x2, y2); + } + } + else + { + float x2 = x0 + (float)G2; + float y2 = y0 + (float)(G2 - 1); + float a2 = (2.0f / 3.0f) - x2 * x2 - y2 * y2; + if (a2 > 0) + { + value += (a2 * a2) * (a2 * a2) * _fnlGradCoord2D(seed, i, j + PRIME_Y, x2, y2); + } + } + } + + return value * 18.24196194486065f; + } + + static float _fnlSingleOpenSimplex2S3D(int seed, FNLfloat x, FNLfloat y, FNLfloat z) + { + // 3D OpenSimplex2S case uses two offset rotated cube grids. + + /* + * --- Rotation moved to TransformNoiseCoordinate method --- + * const FNLfloat R3 = (FNLfloat)(2.0 / 3.0); + * FNLfloat r = (x + y + z) * R3; // Rotation, not skew + * x = r - x; y = r - y; z = r - z; + */ + + int i = _fnlFastFloor(x); + int j = _fnlFastFloor(y); + int k = _fnlFastFloor(z); + float xi = (float)(x - i); + float yi = (float)(y - j); + float zi = (float)(z - k); + + i *= PRIME_X; + j *= PRIME_Y; + k *= PRIME_Z; + int seed2 = seed + 1293373; + + int xNMask = (int)(-0.5f - xi); + int yNMask = (int)(-0.5f - yi); + int zNMask = (int)(-0.5f - zi); + + float x0 = xi + xNMask; + float y0 = yi + yNMask; + float z0 = zi + zNMask; + float a0 = 0.75f - x0 * x0 - y0 * y0 - z0 * z0; + float value = (a0 * a0) * (a0 * a0) * _fnlGradCoord3D(seed, i + (xNMask & PRIME_X), j + (yNMask & PRIME_Y), k + (zNMask & PRIME_Z), x0, y0, z0); + + float x1 = xi - 0.5f; + float y1 = yi - 0.5f; + float z1 = zi - 0.5f; + float a1 = 0.75f - x1 * x1 - y1 * y1 - z1 * z1; + value += (a1 * a1) * (a1 * a1) * _fnlGradCoord3D(seed2, i + PRIME_X, j + PRIME_Y, k + PRIME_Z, x1, y1, z1); + + float xAFlipMask0 = ((xNMask | 1) << 1) * x1; + float yAFlipMask0 = ((yNMask | 1) << 1) * y1; + float zAFlipMask0 = ((zNMask | 1) << 1) * z1; + float xAFlipMask1 = (-2 - (xNMask << 2)) * x1 - 1.0f; + float yAFlipMask1 = (-2 - (yNMask << 2)) * y1 - 1.0f; + float zAFlipMask1 = (-2 - (zNMask << 2)) * z1 - 1.0f; + + bool skip5 = false; + float a2 = xAFlipMask0 + a0; + if (a2 > 0) + { + float x2 = x0 - (xNMask | 1); + float y2 = y0; + float z2 = z0; + value += (a2 * a2) * (a2 * a2) * _fnlGradCoord3D(seed, i + (~xNMask & PRIME_X), j + (yNMask & PRIME_Y), k + (zNMask & PRIME_Z), x2, y2, z2); + } + else + { + float a3 = yAFlipMask0 + zAFlipMask0 + a0; + if (a3 > 0) + { + float x3 = x0; + float y3 = y0 - (yNMask | 1); + float z3 = z0 - (zNMask | 1); + value += (a3 * a3) * (a3 * a3) * _fnlGradCoord3D(seed, i + (xNMask & PRIME_X), j + (~yNMask & PRIME_Y), k + (~zNMask & PRIME_Z), x3, y3, z3); + } + + float a4 = xAFlipMask1 + a1; + if (a4 > 0) + { + float x4 = (xNMask | 1) + x1; + float y4 = y1; + float z4 = z1; + value += (a4 * a4) * (a4 * a4) * _fnlGradCoord3D(seed2, i + (xNMask & (PRIME_X * 2)), j + PRIME_Y, k + PRIME_Z, x4, y4, z4); + skip5 = true; + } + } + + bool skip9 = false; + float a6 = yAFlipMask0 + a0; + if (a6 > 0) + { + float x6 = x0; + float y6 = y0 - (yNMask | 1); + float z6 = z0; + value += (a6 * a6) * (a6 * a6) * _fnlGradCoord3D(seed, i + (xNMask & PRIME_X), j + (~yNMask & PRIME_Y), k + (zNMask & PRIME_Z), x6, y6, z6); + } + else + { + float a7 = xAFlipMask0 + zAFlipMask0 + a0; + if (a7 > 0) + { + float x7 = x0 - (xNMask | 1); + float y7 = y0; + float z7 = z0 - (zNMask | 1); + value += (a7 * a7) * (a7 * a7) * _fnlGradCoord3D(seed, i + (~xNMask & PRIME_X), j + (yNMask & PRIME_Y), k + (~zNMask & PRIME_Z), x7, y7, z7); + } + + float a8 = yAFlipMask1 + a1; + if (a8 > 0) + { + float x8 = x1; + float y8 = (yNMask | 1) + y1; + float z8 = z1; + value += (a8 * a8) * (a8 * a8) * _fnlGradCoord3D(seed2, i + PRIME_X, j + (yNMask & (PRIME_Y << 1)), k + PRIME_Z, x8, y8, z8); + skip9 = true; + } + } + + bool skipD = false; + float aA = zAFlipMask0 + a0; + if (aA > 0) + { + float xA = x0; + float yA = y0; + float zA = z0 - (zNMask | 1); + value += (aA * aA) * (aA * aA) * _fnlGradCoord3D(seed, i + (xNMask & PRIME_X), j + (yNMask & PRIME_Y), k + (~zNMask & PRIME_Z), xA, yA, zA); + } + else + { + float aB = xAFlipMask0 + yAFlipMask0 + a0; + if (aB > 0) + { + float xB = x0 - (xNMask | 1); + float yB = y0 - (yNMask | 1); + float zB = z0; + value += (aB * aB) * (aB * aB) * _fnlGradCoord3D(seed, i + (~xNMask & PRIME_X), j + (~yNMask & PRIME_Y), k + (zNMask & PRIME_Z), xB, yB, zB); + } + + float aC = zAFlipMask1 + a1; + if (aC > 0) + { + float xC = x1; + float yC = y1; + float zC = (zNMask | 1) + z1; + value += (aC * aC) * (aC * aC) * _fnlGradCoord3D(seed2, i + PRIME_X, j + PRIME_Y, k + (zNMask & (PRIME_Z << 1)), xC, yC, zC); + skipD = true; + } + } + + if (!skip5) + { + float a5 = yAFlipMask1 + zAFlipMask1 + a1; + if (a5 > 0) + { + float x5 = x1; + float y5 = (yNMask | 1) + y1; + float z5 = (zNMask | 1) + z1; + value += (a5 * a5) * (a5 * a5) * _fnlGradCoord3D(seed2, i + PRIME_X, j + (yNMask & (PRIME_Y << 1)), k + (zNMask & (PRIME_Z << 1)), x5, y5, z5); + } + } + + if (!skip9) + { + float a9 = xAFlipMask1 + zAFlipMask1 + a1; + if (a9 > 0) + { + float x9 = (xNMask | 1) + x1; + float y9 = y1; + float z9 = (zNMask | 1) + z1; + value += (a9 * a9) * (a9 * a9) * _fnlGradCoord3D(seed2, i + (xNMask & (PRIME_X * 2)), j + PRIME_Y, k + (zNMask & (PRIME_Z << 1)), x9, y9, z9); + } + } + + if (!skipD) + { + float aD = xAFlipMask1 + yAFlipMask1 + a1; + if (aD > 0) + { + float xD = (xNMask | 1) + x1; + float yD = (yNMask | 1) + y1; + float zD = z1; + value += (aD * aD) * (aD * aD) * _fnlGradCoord3D(seed2, i + (xNMask & (PRIME_X << 1)), j + (yNMask & (PRIME_Y << 1)), k + PRIME_Z, xD, yD, zD); + } + } + + return value * 9.046026385208288f; + } + + // Cellular Noise + + static float _fnlSingleCellular2D(fnl_state *state, int seed, FNLfloat x, FNLfloat y) + { + int xr = _fnlFastRound(x); + int yr = _fnlFastRound(y); + + float distance0 = FLT_MAX; + float distance1 = FLT_MAX; + int closestHash = 0; + + float cellularJitter = 0.5f * state->cellular_jitter_mod; + + int xPrimed = (xr - 1) * PRIME_X; + int yPrimedBase = (yr - 1) * PRIME_Y; + + switch (state->cellular_distance_func) + { + default: + case FNL_CELLULAR_DISTANCE_EUCLIDEAN: + case FNL_CELLULAR_DISTANCE_EUCLIDEANSQ: + for (int xi = xr - 1; xi <= xr + 1; xi++) + { + int yPrimed = yPrimedBase; + + for (int yi = yr - 1; yi <= yr + 1; yi++) + { + int hash = _fnlHash2D(seed, xPrimed, yPrimed); + int idx = hash & (255 << 1); + + float vecX = (float)(xi - x) + RAND_VECS_2D[idx] * cellularJitter; + float vecY = (float)(yi - y) + RAND_VECS_2D[idx | 1] * cellularJitter; + + float newDistance = vecX * vecX + vecY * vecY; + + distance1 = _fnlFastMax(_fnlFastMin(distance1, newDistance), distance0); + if (newDistance < distance0) + { + distance0 = newDistance; + closestHash = hash; + } + yPrimed += PRIME_Y; + } + xPrimed += PRIME_X; + } + break; + case FNL_CELLULAR_DISTANCE_MANHATTAN: + for (int xi = xr - 1; xi <= xr + 1; xi++) + { + int yPrimed = yPrimedBase; + + for (int yi = yr - 1; yi <= yr + 1; yi++) + { + int hash = _fnlHash2D(seed, xPrimed, yPrimed); + int idx = hash & (255 << 1); + + float vecX = (float)(xi - x) + RAND_VECS_2D[idx] * cellularJitter; + float vecY = (float)(yi - y) + RAND_VECS_2D[idx | 1] * cellularJitter; + + float newDistance = _fnlFastAbs(vecX) + _fnlFastAbs(vecY); + + distance1 = _fnlFastMax(_fnlFastMin(distance1, newDistance), distance0); + if (newDistance < distance0) + { + distance0 = newDistance; + closestHash = hash; + } + yPrimed += PRIME_Y; + } + xPrimed += PRIME_X; + } + break; + case FNL_CELLULAR_DISTANCE_HYBRID: + for (int xi = xr - 1; xi <= xr + 1; xi++) + { + int yPrimed = yPrimedBase; + for (int yi = yr - 1; yi <= yr + 1; yi++) + { + int hash = _fnlHash2D(seed, xPrimed, yPrimed); + int idx = hash & (255 << 1); + + float vecX = (float)(xi - x) + RAND_VECS_2D[idx] * cellularJitter; + float vecY = (float)(yi - y) + RAND_VECS_2D[idx | 1] * cellularJitter; + + float newDistance = (_fnlFastAbs(vecX) + _fnlFastAbs(vecY)) + (vecX * vecX + vecY * vecY); + + distance1 = _fnlFastMax(_fnlFastMin(distance1, newDistance), distance0); + if (newDistance < distance0) + { + distance0 = newDistance; + closestHash = hash; + } + yPrimed += PRIME_Y; + } + xPrimed += PRIME_X; + } + break; + } + + if (state->cellular_distance_func == FNL_CELLULAR_DISTANCE_EUCLIDEAN && state->cellular_return_type >= FNL_CELLULAR_RETURN_VALUE_DISTANCE) + { + distance0 = _fnlFastSqrt(distance0); + if (state->cellular_return_type >= FNL_CELLULAR_RETURN_VALUE_DISTANCE2) + distance1 = _fnlFastSqrt(distance1); + } + + switch (state->cellular_return_type) + { + case FNL_CELLULAR_RETURN_VALUE_CELLVALUE: + return closestHash * (1 / 2147483648.0f); + case FNL_CELLULAR_RETURN_VALUE_DISTANCE: + return distance0 - 1; + case FNL_CELLULAR_RETURN_VALUE_DISTANCE2: + return distance1 - 1; + case FNL_CELLULAR_RETURN_VALUE_DISTANCE2ADD: + return (distance1 + distance0) * 0.5f - 1; + case FNL_CELLULAR_RETURN_VALUE_DISTANCE2SUB: + return distance1 - distance0 - 1; + case FNL_CELLULAR_RETURN_VALUE_DISTANCE2MUL: + return distance1 * distance0 * 0.5f - 1; + case FNL_CELLULAR_RETURN_VALUE_DISTANCE2DIV: + return distance0 / distance1 - 1; + default: + return 0; + } + } + + static float _fnlSingleCellular3D(fnl_state *state, int seed, FNLfloat x, FNLfloat y, FNLfloat z) + { + int xr = _fnlFastRound(x); + int yr = _fnlFastRound(y); + int zr = _fnlFastRound(z); + + float distance0 = FLT_MAX; + float distance1 = FLT_MAX; + int closestHash = 0; + + float cellularJitter = 0.39614353f * state->cellular_jitter_mod; + + int xPrimed = (xr - 1) * PRIME_X; + int yPrimedBase = (yr - 1) * PRIME_Y; + int zPrimedBase = (zr - 1) * PRIME_Z; + + switch (state->cellular_distance_func) + { + default: + case FNL_CELLULAR_DISTANCE_EUCLIDEAN: + case FNL_CELLULAR_DISTANCE_EUCLIDEANSQ: + for (int xi = xr - 1; xi <= xr + 1; xi++) + { + int yPrimed = yPrimedBase; + + for (int yi = yr - 1; yi <= yr + 1; yi++) + { + int zPrimed = zPrimedBase; + + for (int zi = zr - 1; zi <= zr + 1; zi++) + { + int hash = _fnlHash3D(seed, xPrimed, yPrimed, zPrimed); + int idx = hash & (255 << 2); + + float vecX = (float)(xi - x) + RAND_VECS_3D[idx] * cellularJitter; + float vecY = (float)(yi - y) + RAND_VECS_3D[idx | 1] * cellularJitter; + float vecZ = (float)(zi - z) + RAND_VECS_3D[idx | 2] * cellularJitter; + + float newDistance = vecX * vecX + vecY * vecY + vecZ * vecZ; + + distance1 = _fnlFastMax(_fnlFastMin(distance1, newDistance), distance0); + if (newDistance < distance0) + { + distance0 = newDistance; + closestHash = hash; + } + zPrimed += PRIME_Z; + } + yPrimed += PRIME_Y; + } + xPrimed += PRIME_X; + } + break; + case FNL_CELLULAR_DISTANCE_MANHATTAN: + for (int xi = xr - 1; xi <= xr + 1; xi++) + { + int yPrimed = yPrimedBase; + + for (int yi = yr - 1; yi <= yr + 1; yi++) + { + int zPrimed = zPrimedBase; + + for (int zi = zr - 1; zi <= zr + 1; zi++) + { + int hash = _fnlHash3D(seed, xPrimed, yPrimed, zPrimed); + int idx = hash & (255 << 2); + + float vecX = (float)(xi - x) + RAND_VECS_3D[idx] * cellularJitter; + float vecY = (float)(yi - y) + RAND_VECS_3D[idx | 1] * cellularJitter; + float vecZ = (float)(zi - z) + RAND_VECS_3D[idx | 2] * cellularJitter; + + float newDistance = _fnlFastAbs(vecX) + _fnlFastAbs(vecY) + _fnlFastAbs(vecZ); + + distance1 = _fnlFastMax(_fnlFastMin(distance1, newDistance), distance0); + if (newDistance < distance0) + { + distance0 = newDistance; + closestHash = hash; + } + zPrimed += PRIME_Z; + } + yPrimed += PRIME_Y; + } + xPrimed += PRIME_X; + } + break; + case FNL_CELLULAR_DISTANCE_HYBRID: + for (int xi = xr - 1; xi <= xr + 1; xi++) + { + int yPrimed = yPrimedBase; + + for (int yi = yr - 1; yi <= yr + 1; yi++) + { + int zPrimed = zPrimedBase; + + for (int zi = zr - 1; zi <= zr + 1; zi++) + { + int hash = _fnlHash3D(seed, xPrimed, yPrimed, zPrimed); + int idx = hash & (255 << 2); + + float vecX = (float)(xi - x) + RAND_VECS_3D[idx] * cellularJitter; + float vecY = (float)(yi - y) + RAND_VECS_3D[idx | 1] * cellularJitter; + float vecZ = (float)(zi - z) + RAND_VECS_3D[idx | 2] * cellularJitter; + + float newDistance = (_fnlFastAbs(vecX) + _fnlFastAbs(vecY) + _fnlFastAbs(vecZ)) + (vecX * vecX + vecY * vecY + vecZ * vecZ); + + distance1 = _fnlFastMax(_fnlFastMin(distance1, newDistance), distance0); + if (newDistance < distance0) + { + distance0 = newDistance; + closestHash = hash; + } + zPrimed += PRIME_Z; + } + yPrimed += PRIME_Y; + } + xPrimed += PRIME_X; + } + break; + } + + if (state->cellular_distance_func == FNL_CELLULAR_DISTANCE_EUCLIDEAN && state->cellular_return_type >= FNL_CELLULAR_RETURN_VALUE_DISTANCE) + { + distance0 = _fnlFastSqrt(distance0); + if (state->cellular_return_type >= FNL_CELLULAR_RETURN_VALUE_DISTANCE2) + distance1 = _fnlFastSqrt(distance1); + } + + switch (state->cellular_return_type) + { + case FNL_CELLULAR_RETURN_VALUE_CELLVALUE: + return closestHash * (1 / 2147483648.0f); + case FNL_CELLULAR_RETURN_VALUE_DISTANCE: + return distance0 - 1; + case FNL_CELLULAR_RETURN_VALUE_DISTANCE2: + return distance1 - 1; + case FNL_CELLULAR_RETURN_VALUE_DISTANCE2ADD: + return (distance1 + distance0) * 0.5f - 1; + case FNL_CELLULAR_RETURN_VALUE_DISTANCE2SUB: + return distance1 - distance0 - 1; + case FNL_CELLULAR_RETURN_VALUE_DISTANCE2MUL: + return distance1 * distance0 * 0.5f - 1; + case FNL_CELLULAR_RETURN_VALUE_DISTANCE2DIV: + return distance0 / distance1 - 1; + default: + return 0; + } + } + + // Perlin Noise + + static float _fnlSinglePerlin2D(int seed, FNLfloat x, FNLfloat y) + { + int x0 = _fnlFastFloor(x); + int y0 = _fnlFastFloor(y); + + float xd0 = (float)(x - x0); + float yd0 = (float)(y - y0); + float xd1 = xd0 - 1; + float yd1 = yd0 - 1; + + float xs = _fnlInterpQuintic(xd0); + float ys = _fnlInterpQuintic(yd0); + + x0 *= PRIME_X; + y0 *= PRIME_Y; + int x1 = x0 + PRIME_X; + int y1 = y0 + PRIME_Y; + + float xf0 = _fnlLerp(_fnlGradCoord2D(seed, x0, y0, xd0, yd0), _fnlGradCoord2D(seed, x1, y0, xd1, yd0), xs); + float xf1 = _fnlLerp(_fnlGradCoord2D(seed, x0, y1, xd0, yd1), _fnlGradCoord2D(seed, x1, y1, xd1, yd1), xs); + + return _fnlLerp(xf0, xf1, ys) * 1.4247691104677813f; + } + + static float _fnlSinglePerlin3D(int seed, FNLfloat x, FNLfloat y, FNLfloat z) + { + int x0 = _fnlFastFloor(x); + int y0 = _fnlFastFloor(y); + int z0 = _fnlFastFloor(z); + + float xd0 = (float)(x - x0); + float yd0 = (float)(y - y0); + float zd0 = (float)(z - z0); + float xd1 = xd0 - 1; + float yd1 = yd0 - 1; + float zd1 = zd0 - 1; + + float xs = _fnlInterpQuintic(xd0); + float ys = _fnlInterpQuintic(yd0); + float zs = _fnlInterpQuintic(zd0); + + x0 *= PRIME_X; + y0 *= PRIME_Y; + z0 *= PRIME_Z; + int x1 = x0 + PRIME_X; + int y1 = y0 + PRIME_Y; + int z1 = z0 + PRIME_Z; + + float xf00 = _fnlLerp(_fnlGradCoord3D(seed, x0, y0, z0, xd0, yd0, zd0), _fnlGradCoord3D(seed, x1, y0, z0, xd1, yd0, zd0), xs); + float xf10 = _fnlLerp(_fnlGradCoord3D(seed, x0, y1, z0, xd0, yd1, zd0), _fnlGradCoord3D(seed, x1, y1, z0, xd1, yd1, zd0), xs); + float xf01 = _fnlLerp(_fnlGradCoord3D(seed, x0, y0, z1, xd0, yd0, zd1), _fnlGradCoord3D(seed, x1, y0, z1, xd1, yd0, zd1), xs); + float xf11 = _fnlLerp(_fnlGradCoord3D(seed, x0, y1, z1, xd0, yd1, zd1), _fnlGradCoord3D(seed, x1, y1, z1, xd1, yd1, zd1), xs); + + float yf0 = _fnlLerp(xf00, xf10, ys); + float yf1 = _fnlLerp(xf01, xf11, ys); + + return _fnlLerp(yf0, yf1, zs) * 0.964921414852142333984375f; + } + + // Value Cubic + + static float _fnlSingleValueCubic2D(int seed, FNLfloat x, FNLfloat y) + { + int x1 = _fnlFastFloor(x); + int y1 = _fnlFastFloor(y); + + float xs = x - (float)x1; + float ys = y - (float)y1; + + x1 *= PRIME_X; + y1 *= PRIME_Y; + + int x0 = x1 - PRIME_X; + int y0 = y1 - PRIME_Y; + int x2 = x1 + PRIME_X; + int y2 = y1 + PRIME_Y; + int x3 = x1 + (int)((long)PRIME_X << 1); + int y3 = y1 + (int)((long)PRIME_Y << 1); + + return _fnlCubicLerp( + _fnlCubicLerp(_fnlValCoord2D(seed, x0, y0), _fnlValCoord2D(seed, x1, y0), _fnlValCoord2D(seed, x2, y0), _fnlValCoord2D(seed, x3, y0), + xs), + _fnlCubicLerp(_fnlValCoord2D(seed, x0, y1), _fnlValCoord2D(seed, x1, y1), _fnlValCoord2D(seed, x2, y1), _fnlValCoord2D(seed, x3, y1), + xs), + _fnlCubicLerp(_fnlValCoord2D(seed, x0, y2), _fnlValCoord2D(seed, x1, y2), _fnlValCoord2D(seed, x2, y2), _fnlValCoord2D(seed, x3, y2), + xs), + _fnlCubicLerp(_fnlValCoord2D(seed, x0, y3), _fnlValCoord2D(seed, x1, y3), _fnlValCoord2D(seed, x2, y3), _fnlValCoord2D(seed, x3, y3), + xs), + ys) * + (1 / (1.5f * 1.5f)); + } + + static float _fnlSingleValueCubic3D(int seed, FNLfloat x, FNLfloat y, FNLfloat z) + { + int x1 = _fnlFastFloor(x); + int y1 = _fnlFastFloor(y); + int z1 = _fnlFastFloor(z); + + float xs = x - (float)x1; + float ys = y - (float)y1; + float zs = z - (float)z1; + + x1 *= PRIME_X; + y1 *= PRIME_Y; + z1 *= PRIME_Z; + + int x0 = x1 - PRIME_X; + int y0 = y1 - PRIME_Y; + int z0 = z1 - PRIME_Z; + int x2 = x1 + PRIME_X; + int y2 = y1 + PRIME_Y; + int z2 = z1 + PRIME_Z; + int x3 = x1 + (int)((long)PRIME_X << 1); + int y3 = y1 + (int)((long)PRIME_Y << 1); + int z3 = z1 + (int)((long)PRIME_Z << 1); + + return _fnlCubicLerp( + _fnlCubicLerp( + _fnlCubicLerp(_fnlValCoord3D(seed, x0, y0, z0), _fnlValCoord3D(seed, x1, y0, z0), _fnlValCoord3D(seed, x2, y0, z0), _fnlValCoord3D(seed, x3, y0, z0), xs), + _fnlCubicLerp(_fnlValCoord3D(seed, x0, y1, z0), _fnlValCoord3D(seed, x1, y1, z0), _fnlValCoord3D(seed, x2, y1, z0), _fnlValCoord3D(seed, x3, y1, z0), xs), + _fnlCubicLerp(_fnlValCoord3D(seed, x0, y2, z0), _fnlValCoord3D(seed, x1, y2, z0), _fnlValCoord3D(seed, x2, y2, z0), _fnlValCoord3D(seed, x3, y2, z0), xs), + _fnlCubicLerp(_fnlValCoord3D(seed, x0, y3, z0), _fnlValCoord3D(seed, x1, y3, z0), _fnlValCoord3D(seed, x2, y3, z0), _fnlValCoord3D(seed, x3, y3, z0), xs), + ys), + _fnlCubicLerp( + _fnlCubicLerp(_fnlValCoord3D(seed, x0, y0, z1), _fnlValCoord3D(seed, x1, y0, z1), _fnlValCoord3D(seed, x2, y0, z1), _fnlValCoord3D(seed, x3, y0, z1), xs), + _fnlCubicLerp(_fnlValCoord3D(seed, x0, y1, z1), _fnlValCoord3D(seed, x1, y1, z1), _fnlValCoord3D(seed, x2, y1, z1), _fnlValCoord3D(seed, x3, y1, z1), xs), + _fnlCubicLerp(_fnlValCoord3D(seed, x0, y2, z1), _fnlValCoord3D(seed, x1, y2, z1), _fnlValCoord3D(seed, x2, y2, z1), _fnlValCoord3D(seed, x3, y2, z1), xs), + _fnlCubicLerp(_fnlValCoord3D(seed, x0, y3, z1), _fnlValCoord3D(seed, x1, y3, z1), _fnlValCoord3D(seed, x2, y3, z1), _fnlValCoord3D(seed, x3, y3, z1), xs), + ys), + _fnlCubicLerp( + _fnlCubicLerp(_fnlValCoord3D(seed, x0, y0, z2), _fnlValCoord3D(seed, x1, y0, z2), _fnlValCoord3D(seed, x2, y0, z2), _fnlValCoord3D(seed, x3, y0, z2), xs), + _fnlCubicLerp(_fnlValCoord3D(seed, x0, y1, z2), _fnlValCoord3D(seed, x1, y1, z2), _fnlValCoord3D(seed, x2, y1, z2), _fnlValCoord3D(seed, x3, y1, z2), xs), + _fnlCubicLerp(_fnlValCoord3D(seed, x0, y2, z2), _fnlValCoord3D(seed, x1, y2, z2), _fnlValCoord3D(seed, x2, y2, z2), _fnlValCoord3D(seed, x3, y2, z2), xs), + _fnlCubicLerp(_fnlValCoord3D(seed, x0, y3, z2), _fnlValCoord3D(seed, x1, y3, z2), _fnlValCoord3D(seed, x2, y3, z2), _fnlValCoord3D(seed, x3, y3, z2), xs), + ys), + _fnlCubicLerp( + _fnlCubicLerp(_fnlValCoord3D(seed, x0, y0, z3), _fnlValCoord3D(seed, x1, y0, z3), _fnlValCoord3D(seed, x2, y0, z3), _fnlValCoord3D(seed, x3, y0, z3), xs), + _fnlCubicLerp(_fnlValCoord3D(seed, x0, y1, z3), _fnlValCoord3D(seed, x1, y1, z3), _fnlValCoord3D(seed, x2, y1, z3), _fnlValCoord3D(seed, x3, y1, z3), xs), + _fnlCubicLerp(_fnlValCoord3D(seed, x0, y2, z3), _fnlValCoord3D(seed, x1, y2, z3), _fnlValCoord3D(seed, x2, y2, z3), _fnlValCoord3D(seed, x3, y2, z3), xs), + _fnlCubicLerp(_fnlValCoord3D(seed, x0, y3, z3), _fnlValCoord3D(seed, x1, y3, z3), _fnlValCoord3D(seed, x2, y3, z3), _fnlValCoord3D(seed, x3, y3, z3), xs), + ys), + zs) * + (1 / 1.5f * 1.5f * 1.5f); + } + + // Value noise + + static float _fnlSingleValue2D(int seed, FNLfloat x, FNLfloat y) + { + int x0 = _fnlFastFloor(x); + int y0 = _fnlFastFloor(y); + + float xs = _fnlInterpHermite((float)(x - x0)); + float ys = _fnlInterpHermite((float)(y - y0)); + + x0 *= PRIME_X; + y0 *= PRIME_Y; + int x1 = x0 + PRIME_X; + int y1 = y0 + PRIME_Y; + + float xf0 = _fnlLerp(_fnlValCoord2D(seed, x0, y0), _fnlValCoord2D(seed, x1, y0), xs); + float xf1 = _fnlLerp(_fnlValCoord2D(seed, x0, y1), _fnlValCoord2D(seed, x1, y1), xs); + + return _fnlLerp(xf0, xf1, ys); + } + + static float _fnlSingleValue3D(int seed, FNLfloat x, FNLfloat y, FNLfloat z) + { + int x0 = _fnlFastFloor(x); + int y0 = _fnlFastFloor(y); + int z0 = _fnlFastFloor(z); + + float xs = _fnlInterpHermite((float)(x - x0)); + float ys = _fnlInterpHermite((float)(y - y0)); + float zs = _fnlInterpHermite((float)(z - z0)); + + x0 *= PRIME_X; + y0 *= PRIME_Y; + z0 *= PRIME_Z; + int x1 = x0 + PRIME_X; + int y1 = y0 + PRIME_Y; + int z1 = z0 + PRIME_Z; + + float xf00 = _fnlLerp(_fnlValCoord3D(seed, x0, y0, z0), _fnlValCoord3D(seed, x1, y0, z0), xs); + float xf10 = _fnlLerp(_fnlValCoord3D(seed, x0, y1, z0), _fnlValCoord3D(seed, x1, y1, z0), xs); + float xf01 = _fnlLerp(_fnlValCoord3D(seed, x0, y0, z1), _fnlValCoord3D(seed, x1, y0, z1), xs); + float xf11 = _fnlLerp(_fnlValCoord3D(seed, x0, y1, z1), _fnlValCoord3D(seed, x1, y1, z1), xs); + + float yf0 = _fnlLerp(xf00, xf10, ys); + float yf1 = _fnlLerp(xf01, xf11, ys); + + return _fnlLerp(yf0, yf1, zs); + } + + // Domain Warp + + // Forward declare + static void _fnlSingleDomainWarpBasicGrid2D(int seed, float warpAmp, float frequency, FNLfloat x, FNLfloat y, FNLfloat *xp, FNLfloat *yp); + static void _fnlSingleDomainWarpBasicGrid3D(int seed, float warpAmp, float frequency, FNLfloat x, FNLfloat y, FNLfloat z, FNLfloat *xp, FNLfloat *yp, FNLfloat *zp); + static void _fnlSingleDomainWarpSimplexGradient(int seed, float warpAmp, float frequency, FNLfloat x, FNLfloat y, FNLfloat *xr, FNLfloat *yr, bool outGradOnly); + static void _fnlSingleDomainWarpOpenSimplex2Gradient(int seed, float warpAmp, float frequency, FNLfloat x, FNLfloat y, FNLfloat z, FNLfloat *xr, FNLfloat *yr, FNLfloat *zr, bool outGradOnly); + + static inline void _fnlDoSingleDomainWarp2D(fnl_state *state, int seed, float amp, float freq, FNLfloat x, FNLfloat y, FNLfloat *xp, FNLfloat *yp) + { + switch (state->domain_warp_type) + { + case FNL_DOMAIN_WARP_OPENSIMPLEX2: + _fnlSingleDomainWarpSimplexGradient(seed, amp * 38.283687591552734375f, freq, x, y, xp, yp, false); + break; + case FNL_DOMAIN_WARP_OPENSIMPLEX2_REDUCED: + _fnlSingleDomainWarpSimplexGradient(seed, amp * 16.0f, freq, x, y, xp, yp, true); + break; + case FNL_DOMAIN_WARP_BASICGRID: + _fnlSingleDomainWarpBasicGrid2D(seed, amp, freq, x, y, xp, yp); + break; + } + } + + static inline void _fnlDoSingleDomainWarp3D(fnl_state *state, int seed, float amp, float freq, FNLfloat x, FNLfloat y, FNLfloat z, FNLfloat *xp, FNLfloat *yp, FNLfloat *zp) + { + switch (state->domain_warp_type) + { + case FNL_DOMAIN_WARP_OPENSIMPLEX2: + _fnlSingleDomainWarpOpenSimplex2Gradient(seed, amp * 32.69428253173828125f, freq, x, y, z, xp, yp, zp, false); + break; + case FNL_DOMAIN_WARP_OPENSIMPLEX2_REDUCED: + _fnlSingleDomainWarpOpenSimplex2Gradient(seed, amp * 7.71604938271605f, freq, x, y, z, xp, yp, zp, true); + break; + case FNL_DOMAIN_WARP_BASICGRID: + _fnlSingleDomainWarpBasicGrid3D(seed, amp, freq, x, y, z, xp, yp, zp); + break; + } + } + + // Domain Warp Single Wrapper + + static void _fnlDomainWarpSingle2D(fnl_state *state, FNLfloat *x, FNLfloat *y) + { + int seed = state->seed; + float amp = state->domain_warp_amp * _fnlCalculateFractalBounding(state); + float freq = state->frequency; + + FNLfloat xs = *x; + FNLfloat ys = *y; + _fnlTransformDomainWarpCoordinate2D(state, &xs, &ys); + + _fnlDoSingleDomainWarp2D(state, seed, amp, freq, xs, ys, x, y); + } + + static void _fnlDomainWarpSingle3D(fnl_state *state, FNLfloat *x, FNLfloat *y, FNLfloat *z) + { + int seed = state->seed; + float amp = state->domain_warp_amp * _fnlCalculateFractalBounding(state); + float freq = state->frequency; + + FNLfloat xs = *x; + FNLfloat ys = *y; + FNLfloat zs = *z; + _fnlTransformDomainWarpCoordinate3D(state, &xs, &ys, &zs); + + _fnlDoSingleDomainWarp3D(state, seed, amp, freq, xs, ys, zs, x, y, z); + } + + // Domain Warp Fractal Progressive + + static void _fnlDomainWarpFractalProgressive2D(fnl_state *state, FNLfloat *x, FNLfloat *y) + { + int seed = state->seed; + float amp = state->domain_warp_amp * _fnlCalculateFractalBounding(state); + float freq = state->frequency; + + for (int i = 0; i < state->octaves; i++) + { + FNLfloat xs = *x; + FNLfloat ys = *y; + _fnlTransformDomainWarpCoordinate2D(state, &xs, &ys); + + _fnlDoSingleDomainWarp2D(state, seed, amp, freq, xs, ys, x, y); + + seed++; + amp *= state->gain; + freq *= state->lacunarity; + } + } + + static void _fnlDomainWarpFractalProgressive3D(fnl_state *state, FNLfloat *x, FNLfloat *y, FNLfloat *z) + { + int seed = state->seed; + float amp = state->domain_warp_amp * _fnlCalculateFractalBounding(state); + float freq = state->frequency; + + for (int i = 0; i < state->octaves; i++) + { + FNLfloat xs = *x; + FNLfloat ys = *y; + FNLfloat zs = *z; + _fnlTransformDomainWarpCoordinate3D(state, &xs, &ys, &zs); + + _fnlDoSingleDomainWarp3D(state, seed, amp, freq, xs, ys, zs, x, y, z); + + seed++; + amp *= state->gain; + freq *= state->lacunarity; + } + } + + // Domain Warp Fractal Independent + + static void _fnlDomainWarpFractalIndependent2D(fnl_state *state, FNLfloat *x, FNLfloat *y) + { + FNLfloat xs = *x; + FNLfloat ys = *y; + _fnlTransformDomainWarpCoordinate2D(state, &xs, &ys); + + int seed = state->seed; + float amp = state->domain_warp_amp * _fnlCalculateFractalBounding(state); + float freq = state->frequency; + + for (int i = 0; i < state->octaves; i++) + { + _fnlDoSingleDomainWarp2D(state, seed, amp, freq, xs, ys, x, y); + + seed++; + amp *= state->gain; + freq *= state->lacunarity; + } + } + + static void _fnlDomainWarpFractalIndependent3D(fnl_state *state, FNLfloat *x, FNLfloat *y, FNLfloat *z) + { + FNLfloat xs = *x; + FNLfloat ys = *y; + FNLfloat zs = *z; + _fnlTransformDomainWarpCoordinate3D(state, &xs, &ys, &zs); + + int seed = state->seed; + float amp = state->domain_warp_amp * _fnlCalculateFractalBounding(state); + float freq = state->frequency; + + for (int i = 0; i < state->octaves; i++) + { + _fnlDoSingleDomainWarp3D(state, seed, amp, freq, xs, ys, zs, x, y, z); + + seed++; + amp *= state->gain; + freq *= state->lacunarity; + } + } + + // Domain Warp Basic Grid + + static void _fnlSingleDomainWarpBasicGrid2D(int seed, float warpAmp, float frequency, FNLfloat x, FNLfloat y, FNLfloat *xp, FNLfloat *yp) + { + FNLfloat xf = x * frequency; + FNLfloat yf = y * frequency; + + int x0 = _fnlFastFloor(xf); + int y0 = _fnlFastFloor(yf); + + float xs = _fnlInterpHermite((float)(xf - x0)); + float ys = _fnlInterpHermite((float)(yf - y0)); + + x0 *= PRIME_X; + y0 *= PRIME_Y; + int x1 = x0 + PRIME_X; + int y1 = y0 + PRIME_Y; + + int idx0 = _fnlHash2D(seed, x0, y0) & (255 << 1); + int idx1 = _fnlHash2D(seed, x1, y0) & (255 << 1); + + float lx0x = _fnlLerp(RAND_VECS_2D[idx0], RAND_VECS_2D[idx1], xs); + float ly0x = _fnlLerp(RAND_VECS_2D[idx0 | 1], RAND_VECS_2D[idx1 | 1], xs); + + idx0 = _fnlHash2D(seed, x0, y1) & (255 << 1); + idx1 = _fnlHash2D(seed, x1, y1) & (255 << 1); + + float lx1x = _fnlLerp(RAND_VECS_2D[idx0], RAND_VECS_2D[idx1], xs); + float ly1x = _fnlLerp(RAND_VECS_2D[idx0 | 1], RAND_VECS_2D[idx1 | 1], xs); + + *xp += _fnlLerp(lx0x, lx1x, ys) * warpAmp; + *yp += _fnlLerp(ly0x, ly1x, ys) * warpAmp; + } + + static void _fnlSingleDomainWarpBasicGrid3D(int seed, float warpAmp, float frequency, FNLfloat x, FNLfloat y, FNLfloat z, FNLfloat *xp, FNLfloat *yp, FNLfloat *zp) + { + FNLfloat xf = x * frequency; + FNLfloat yf = y * frequency; + FNLfloat zf = z * frequency; + + int x0 = _fnlFastFloor(xf); + int y0 = _fnlFastFloor(yf); + int z0 = _fnlFastFloor(zf); + + float xs = _fnlInterpHermite((float)(xf - x0)); + float ys = _fnlInterpHermite((float)(yf - y0)); + float zs = _fnlInterpHermite((float)(zf - z0)); + + x0 *= PRIME_X; + y0 *= PRIME_Y; + z0 *= PRIME_Z; + int x1 = x0 + PRIME_X; + int y1 = y0 + PRIME_Y; + int z1 = z0 + PRIME_Z; + + int idx0 = _fnlHash3D(seed, x0, y0, z0) & (255 << 2); + int idx1 = _fnlHash3D(seed, x1, y0, z0) & (255 << 2); + + float lx0x = _fnlLerp(RAND_VECS_3D[idx0], RAND_VECS_3D[idx1], xs); + float ly0x = _fnlLerp(RAND_VECS_3D[idx0 | 1], RAND_VECS_3D[idx1 | 1], xs); + float lz0x = _fnlLerp(RAND_VECS_3D[idx0 | 2], RAND_VECS_3D[idx1 | 2], xs); + + idx0 = _fnlHash3D(seed, x0, y1, z0) & (255 << 2); + idx1 = _fnlHash3D(seed, x1, y1, z0) & (255 << 2); + + float lx1x = _fnlLerp(RAND_VECS_3D[idx0], RAND_VECS_3D[idx1], xs); + float ly1x = _fnlLerp(RAND_VECS_3D[idx0 | 1], RAND_VECS_3D[idx1 | 1], xs); + float lz1x = _fnlLerp(RAND_VECS_3D[idx0 | 2], RAND_VECS_3D[idx1 | 2], xs); + + float lx0y = _fnlLerp(lx0x, lx1x, ys); + float ly0y = _fnlLerp(ly0x, ly1x, ys); + float lz0y = _fnlLerp(lz0x, lz1x, ys); + + idx0 = _fnlHash3D(seed, x0, y0, z1) & (255 << 2); + idx1 = _fnlHash3D(seed, x1, y0, z1) & (255 << 2); + + lx0x = _fnlLerp(RAND_VECS_3D[idx0], RAND_VECS_3D[idx1], xs); + ly0x = _fnlLerp(RAND_VECS_3D[idx0 | 1], RAND_VECS_3D[idx1 | 1], xs); + lz0x = _fnlLerp(RAND_VECS_3D[idx0 | 2], RAND_VECS_3D[idx1 | 2], xs); + + idx0 = _fnlHash3D(seed, x0, y1, z1) & (255 << 2); + idx1 = _fnlHash3D(seed, x1, y1, z1) & (255 << 2); + + lx1x = _fnlLerp(RAND_VECS_3D[idx0], RAND_VECS_3D[idx1], xs); + ly1x = _fnlLerp(RAND_VECS_3D[idx0 | 1], RAND_VECS_3D[idx1 | 1], xs); + lz1x = _fnlLerp(RAND_VECS_3D[idx0 | 2], RAND_VECS_3D[idx1 | 2], xs); + + *xp += _fnlLerp(lx0y, _fnlLerp(lx0x, lx1x, ys), zs) * warpAmp; + *yp += _fnlLerp(ly0y, _fnlLerp(ly0x, ly1x, ys), zs) * warpAmp; + *zp += _fnlLerp(lz0y, _fnlLerp(lz0x, lz1x, ys), zs) * warpAmp; + } + + // Domain Warp Simplex/OpenSimplex2 + + static void _fnlSingleDomainWarpSimplexGradient(int seed, float warpAmp, float frequency, FNLfloat x, FNLfloat y, FNLfloat *xr, FNLfloat *yr, bool outGradOnly) + { + const float SQRT3 = 1.7320508075688772935274463415059f; + const float G2 = (3 - SQRT3) / 6; + + x *= frequency; + y *= frequency; + + /* + * --- Skew moved to TransformNoiseCoordinate method --- + * const FNLfloat F2 = 0.5f * (SQRT3 - 1); + * FNLfloat s = (x + y) * F2; + * x += s; y += s; + */ + + int i = _fnlFastFloor(x); + int j = _fnlFastFloor(y); + float xi = (float)(x - i); + float yi = (float)(y - j); + + float t = (xi + yi) * G2; + float x0 = (float)(xi - t); + float y0 = (float)(yi - t); + + i *= PRIME_X; + j *= PRIME_Y; + + float vx, vy; + vx = vy = 0; + + float a = 0.5f - x0 * x0 - y0 * y0; + if (a > 0) + { + float aaaa = (a * a) * (a * a); + float xo, yo; + if (outGradOnly) + _fnlGradCoordOut2D(seed, i, j, &xo, &yo); + else + _fnlGradCoordDual2D(seed, i, j, x0, y0, &xo, &yo); + vx += aaaa * xo; + vy += aaaa * yo; + } + + float c = (float)(2 * (1 - 2 * G2) * (1 / G2 - 2)) * t + ((float)(-2 * (1 - 2 * G2) * (1 - 2 * G2)) + a); + if (c > 0) + { + float x2 = x0 + (2 * (float)G2 - 1); + float y2 = y0 + (2 * (float)G2 - 1); + float cccc = (c * c) * (c * c); + float xo, yo; + if (outGradOnly) + _fnlGradCoordOut2D(seed, i + PRIME_X, j + PRIME_Y, &xo, &yo); + else + _fnlGradCoordDual2D(seed, i + PRIME_X, j + PRIME_Y, x2, y2, &xo, &yo); + vx += cccc * xo; + vy += cccc * yo; + } + + if (y0 > x0) + { + float x1 = x0 + (float)G2; + float y1 = y0 + ((float)G2 - 1); + float b = 0.5f - x1 * x1 - y1 * y1; + if (b > 0) + { + float bbbb = (b * b) * (b * b); + float xo, yo; + if (outGradOnly) + _fnlGradCoordOut2D(seed, i, j + PRIME_Y, &xo, &yo); + else + _fnlGradCoordDual2D(seed, i, j + PRIME_Y, x1, y1, &xo, &yo); + vx += bbbb * xo; + vy += bbbb * yo; + } + } + else + { + float x1 = x0 + ((float)G2 - 1); + float y1 = y0 + (float)G2; + float b = 0.5f - x1 * x1 - y1 * y1; + if (b > 0) + { + float bbbb = (b * b) * (b * b); + float xo, yo; + if (outGradOnly) + _fnlGradCoordOut2D(seed, i + PRIME_X, j, &xo, &yo); + else + _fnlGradCoordDual2D(seed, i + PRIME_X, j, x1, y1, &xo, &yo); + vx += bbbb * xo; + vy += bbbb * yo; + } + } + + *xr += vx * warpAmp; + *yr += vy * warpAmp; + } + + static void _fnlSingleDomainWarpOpenSimplex2Gradient(int seed, float warpAmp, float frequency, FNLfloat x, FNLfloat y, FNLfloat z, FNLfloat *xr, FNLfloat *yr, FNLfloat *zr, bool outGradOnly) + { + x *= frequency; + y *= frequency; + z *= frequency; + + /* + * --- Rotation moved to TransformDomainWarpCoordinate method --- + * const FNLfloat R3 = (FNLfloat)(2.0 / 3.0); + * FNLfloat r = (x + y + z) * R3; // Rotation, not skew + * x = r - x; y = r - y; z = r - z; + */ + + int i = _fnlFastRound(x); + int j = _fnlFastRound(y); + int k = _fnlFastRound(z); + float x0 = (float)x - i; + float y0 = (float)y - j; + float z0 = (float)z - k; + + int xNSign = (int)(-x0 - 1.0f) | 1; + int yNSign = (int)(-y0 - 1.0f) | 1; + int zNSign = (int)(-z0 - 1.0f) | 1; + + float ax0 = xNSign * -x0; + float ay0 = yNSign * -y0; + float az0 = zNSign * -z0; + + i *= PRIME_X; + j *= PRIME_Y; + k *= PRIME_Z; + + float vx, vy, vz; + vx = vy = vz = 0; + + float a = (0.6f - x0 * x0) - (y0 * y0 + z0 * z0); + for (int l = 0; l < 2; l++) + { + if (a > 0) + { + float aaaa = (a * a) * (a * a); + float xo, yo, zo; + if (outGradOnly) + _fnlGradCoordOut3D(seed, i, j, k, &xo, &yo, &zo); + else + _fnlGradCoordDual3D(seed, i, j, k, x0, y0, z0, &xo, &yo, &zo); + vx += aaaa * xo; + vy += aaaa * yo; + vz += aaaa * zo; + } + + float b = a + 1; + int i1 = i; + int j1 = j; + int k1 = k; + float x1 = x0; + float y1 = y0; + float z1 = z0; + if (ax0 >= ay0 && ax0 >= az0) + { + x1 += xNSign; + b -= xNSign * 2 * x1; + i1 -= xNSign * PRIME_X; + } + else if (ay0 > ax0 && ay0 >= az0) + { + y1 += yNSign; + b -= yNSign * 2 * y1; + j1 -= yNSign * PRIME_Y; + } + else + { + z1 += zNSign; + b -= zNSign * 2 * z1; + k1 -= zNSign * PRIME_Z; + } + + if (b > 0) + { + float bbbb = (b * b) * (b * b); + float xo, yo, zo; + if (outGradOnly) + _fnlGradCoordOut3D(seed, i1, j1, k1, &xo, &yo, &zo); + else + _fnlGradCoordDual3D(seed, i1, j1, k1, x1, y1, z1, &xo, &yo, &zo); + vx += bbbb * xo; + vy += bbbb * yo; + vz += bbbb * zo; + } + + if (l == 1) + break; + + ax0 = 0.5f - ax0; + ay0 = 0.5f - ay0; + az0 = 0.5f - az0; + + x0 = xNSign * ax0; + y0 = yNSign * ay0; + z0 = zNSign * az0; + + a += (0.75f - ax0) - (ay0 + az0); + + i += (xNSign >> 1) & PRIME_X; + j += (yNSign >> 1) & PRIME_Y; + k += (zNSign >> 1) & PRIME_Z; + + xNSign = -xNSign; + yNSign = -yNSign; + zNSign = -zNSign; + + seed += 1293373; + } + + *xr += vx * warpAmp; + *yr += vy * warpAmp; + *zr += vz * warpAmp; + } + + // ==================== + // Public API + // ==================== + + fnl_state fnlCreateState() + { + fnl_state newState; + newState.seed = 1337; + newState.frequency = 0.01f; + newState.noise_type = FNL_NOISE_OPENSIMPLEX2; + newState.rotation_type_3d = FNL_ROTATION_NONE; + newState.fractal_type = FNL_FRACTAL_NONE; + newState.octaves = 3; + newState.lacunarity = 2.0f; + newState.gain = 0.5f; + newState.weighted_strength = 0.0f; + newState.ping_pong_strength = 2.0f; + newState.cellular_distance_func = FNL_CELLULAR_DISTANCE_EUCLIDEANSQ; + newState.cellular_return_type = FNL_CELLULAR_RETURN_VALUE_DISTANCE; + newState.cellular_jitter_mod = 1.0f; + newState.domain_warp_amp = 30.0f; + newState.domain_warp_type = FNL_DOMAIN_WARP_OPENSIMPLEX2; + return newState; + } + + float fnlGetNoise2D(fnl_state *state, FNLfloat x, FNLfloat y) + { + _fnlTransformNoiseCoordinate2D(state, &x, &y); + + switch (state->fractal_type) + { + default: + return _fnlGenNoiseSingle2D(state, state->seed, x, y); + case FNL_FRACTAL_FBM: + return _fnlGenFractalFBM2D(state, x, y); + case FNL_FRACTAL_RIDGED: + return _fnlGenFractalRidged2D(state, x, y); + case FNL_FRACTAL_PINGPONG: + return _fnlGenFractalPingPong2D(state, x, y); + } + } + + float fnlGetNoise3D(fnl_state *state, FNLfloat x, FNLfloat y, FNLfloat z) + { + _fnlTransformNoiseCoordinate3D(state, &x, &y, &z); + + // Select a noise type + switch (state->fractal_type) + { + default: + return _fnlGenNoiseSingle3D(state, state->seed, x, y, z); + case FNL_FRACTAL_FBM: + return _fnlGenFractalFBM3D(state, x, y, z); + case FNL_FRACTAL_RIDGED: + return _fnlGenFractalRidged3D(state, x, y, z); + case FNL_FRACTAL_PINGPONG: + return _fnlGenFractalPingPong3D(state, x, y, z); + } + } + + void fnlDomainWarp2D(fnl_state *state, FNLfloat *x, FNLfloat *y) + { + switch (state->fractal_type) + { + default: + _fnlDomainWarpSingle2D(state, x, y); + break; + case FNL_FRACTAL_DOMAIN_WARP_PROGRESSIVE: + _fnlDomainWarpFractalProgressive2D(state, x, y); + break; + case FNL_FRACTAL_DOMAIN_WARP_INDEPENDENT: + _fnlDomainWarpFractalIndependent2D(state, x, y); + break; + } + } + + void fnlDomainWarp3D(fnl_state *state, FNLfloat *x, FNLfloat *y, FNLfloat *z) + { + switch (state->fractal_type) + { + default: + _fnlDomainWarpSingle3D(state, x, y, z); + break; + case FNL_FRACTAL_DOMAIN_WARP_PROGRESSIVE: + _fnlDomainWarpFractalProgressive3D(state, x, y, z); + break; + case FNL_FRACTAL_DOMAIN_WARP_INDEPENDENT: + _fnlDomainWarpFractalIndependent3D(state, x, y, z); + break; + } + } + +#endif // FNL_IMPL + +#if defined(__cplusplus) +} +#endif + +#endif // FASTNOISELITE_H \ No newline at end of file diff --git a/src/OpenSimplex2F.c b/src/OpenSimplex2F.c index 38d60d3..6a2bfd6 100644 --- a/src/OpenSimplex2F.c +++ b/src/OpenSimplex2F.c @@ -18,12 +18,12 @@ int inline _fastFloor(double x) return x < xi ? xi - 1 : xi; } -Grad2 *_newGrad2Arr(unsigned int size) +Grad2 inline *_newGrad2Arr(unsigned int size) { return (Grad2 *)malloc(sizeof(Grad2) * size); } -short *_newShortArr(unsigned int size) +short inline *_newShortArr(unsigned int size) { return (short *)malloc(sizeof(short) * size); } diff --git a/src/main.c b/src/main.c index 48fac59..95c9ea6 100644 --- a/src/main.c +++ b/src/main.c @@ -1,5 +1,7 @@ #include "raylib.h" -#include "OpenSimplex2F.h" + +#define FNL_IMPL +#include "FastNoiseLite.h" #define initialScreenWidth 900 #define initialScreenHeight 900 @@ -9,22 +11,50 @@ int main(void) // Initialization //-------------------------------------------------------------------------------------- - SetConfigFlags(FLAG_WINDOW_RESIZABLE); + SetConfigFlags(FLAG_WINDOW_RESIZABLE | FLAG_VSYNC_HINT); InitWindow(initialScreenWidth, initialScreenHeight, "raylib [core] example - basic window"); SetTargetFPS(60); // Set our game to run at 60 frames-per-second - OpenSimplexEnv *simplexEnv = initOpenSimplex(); - OpenSimplexGradients *simplexGradiants = newOpenSimplexGradients(simplexEnv, 0); + fnl_state state = fnlCreateState(); + state.seed = 0; + state.octaves = 1; + state.noise_type = FNL_NOISE_PERLIN; //-------------------------------------------------------------------------------------- TraceLog(LOG_INFO, TextFormat("%i", GetScreenWidth())); + double offset = 0.0; + // Main game loop while (!WindowShouldClose()) // Detect window close button or ESC key { // Update //---------------------------------------------------------------------------------- + if (IsKeyPressed(KEY_SPACE)) + { + state.noise_type++; + state.noise_type %= (FNL_NOISE_VALUE + 1); + TraceLog(LOG_INFO, TextFormat("Noisetype: %i", state.noise_type)); + } + + if (IsKeyPressed(KEY_UP)) + { + state.octaves++; + } + if (IsKeyPressed(KEY_DOWN)) + { + state.octaves--; + } + if (IsKeyPressed(KEY_UP) || IsKeyPressed(KEY_DOWN)) + { + TraceLog(LOG_INFO, TextFormat("Octaves: %i", state.octaves)); + } + + float frameTime = GetFrameTime(); + offset += (double)frameTime * 10.0; + TraceLog(LOG_INFO, TextFormat("fps: %f (%fms ; total %fs)", 1.0 / frameTime, frameTime * 1000.0, offset / 10.0)); + //---------------------------------------------------------------------------------- // Draw @@ -37,7 +67,7 @@ int main(void) { for (int y = 0; y < GetScreenHeight(); y++) { - int noise = (noise2(simplexEnv, simplexGradiants, x / 64.0, y / 64.0) + 1.0) / 2 * 255; + int noise = (fnlGetNoise2D(&state, ((double)x) + offset, ((double)y) + offset / 2.0) + 1.0) / 2.0 * 255.0; //(noise2(simplexEnv, simplexGradiants, x / 64.0 + offset, y / 64.0 + offset / 2.0) + 1.0) / 2 * 255; DrawPixel(x, y, (Color){noise, noise, noise, 255}); }