From 7edd606fee969a2e51279480873e2e623c433360 Mon Sep 17 00:00:00 2001
From: Tobias Berger <berger@edv-ermtraud.net>
Date: Tue, 16 Nov 2021 13:51:37 +0100
Subject: [PATCH] stoof

---
 include/FastNoiseLite.h |  2 +-
 src/main.c              | 77 +++++++++++++++++++++++++++++++++++------
 2 files changed, 68 insertions(+), 11 deletions(-)

diff --git a/include/FastNoiseLite.h b/include/FastNoiseLite.h
index 767bfeb..967161b 100644
--- a/include/FastNoiseLite.h
+++ b/include/FastNoiseLite.h
@@ -3030,7 +3030,7 @@ extern "C"
   fnl_state fnlCreateState()
   {
     fnl_state newState;
-    newState.seed = 1337;
+    newState.seed = 0;
     newState.frequency = 0.01f;
     newState.noise_type = FNL_NOISE_OPENSIMPLEX2;
     newState.rotation_type_3d = FNL_ROTATION_NONE;
diff --git a/src/main.c b/src/main.c
index 95c9ea6..defbf22 100644
--- a/src/main.c
+++ b/src/main.c
@@ -3,26 +3,49 @@
 #define FNL_IMPL
 #include "FastNoiseLite.h"
 
-#define initialScreenWidth 900
-#define initialScreenHeight 900
+#define INITIAL_SCREEN_WIDTH 900
+#define INITIAL_SCREEN_HEIGHT 900
+
+#define SCALE 64
 
 int main(void)
 {
   // Initialization
   //--------------------------------------------------------------------------------------
 
+  SetTraceLogLevel(LOG_ALL);
   SetConfigFlags(FLAG_WINDOW_RESIZABLE | FLAG_VSYNC_HINT);
-  InitWindow(initialScreenWidth, initialScreenHeight, "raylib [core] example - basic window");
+  InitWindow(INITIAL_SCREEN_WIDTH, INITIAL_SCREEN_HEIGHT, "raylib [core] example - basic window");
 
-  SetTargetFPS(60); // Set our game to run at 60 frames-per-second
+  SetTargetFPS(5); // Set our game to run at 60 frames-per-second
 
   fnl_state state = fnlCreateState();
   state.seed = 0;
+  state.frequency = 1.0f / (float)SCALE;
   state.octaves = 1;
   state.noise_type = FNL_NOISE_PERLIN;
-  //--------------------------------------------------------------------------------------
 
-  TraceLog(LOG_INFO, TextFormat("%i", GetScreenWidth()));
+  int virtualScreenWidth = GetScreenWidth() / SCALE;
+  int virtualScreenHeight = GetScreenHeight() / SCALE;
+  float virtualRatio = (float)virtualScreenWidth / (float)virtualScreenHeight;
+
+  RenderTexture2D *target = (RenderTexture2D *)MemAlloc(sizeof(RenderTexture2D));
+
+  *target = LoadRenderTexture(virtualScreenWidth, virtualScreenHeight);
+
+  Camera2D camera = {0};
+  camera.zoom = 1.0f;
+
+  Rectangle sourceRec = {0.0f,
+                         0.0f,
+                         (float)target->texture.width,
+                         -(float)target->texture.height};
+  Rectangle destRec = {-virtualRatio,
+                       -virtualRatio,
+                       GetScreenWidth() + (virtualRatio * 2.0f),
+                       GetScreenHeight() + (virtualRatio * 2.0f)};
+
+  //--------------------------------------------------------------------------------------
 
   double offset = 0.0;
 
@@ -38,6 +61,27 @@ int main(void)
       TraceLog(LOG_INFO, TextFormat("Noisetype: %i", state.noise_type));
     }
 
+    if (IsWindowResized())
+    {
+      TraceLog(LOG_DEBUG, "Resized.");
+      int virtualScreenWidth = GetScreenWidth() / SCALE;
+      int virtualScreenHeight = GetScreenHeight() / SCALE;
+      float virtualRatio = (float)virtualScreenWidth / (float)virtualScreenHeight;
+
+      UnloadRenderTexture(*target);
+      *target = LoadRenderTexture(virtualScreenWidth, virtualScreenHeight);
+
+      sourceRec = (Rectangle){0.0f,
+                              0.0f,
+                              (float)target->texture.width,
+                              (float)target->texture.height};
+
+      destRec = (Rectangle){0.0f,
+                            0.0f,
+                            GetScreenWidth(),
+                            GetScreenHeight()};
+    }
+
     if (IsKeyPressed(KEY_UP))
     {
       state.octaves++;
@@ -59,26 +103,39 @@ int main(void)
 
     // Draw
     //----------------------------------------------------------------------------------
-    BeginDrawing();
+
+    BeginTextureMode(*target);
 
     ClearBackground(RAYWHITE);
 
-    for (int x = 0; x < GetScreenWidth(); x++)
+    for (int x = 0; x < virtualScreenWidth; x++)
     {
-      for (int y = 0; y < GetScreenHeight(); y++)
+      for (int y = 0; y < virtualScreenHeight; y++)
       {
         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});
+        DrawPixel(x, y, (Color){0, noise, noise, 255});
       }
     }
 
+    EndTextureMode();
+
+    BeginDrawing();
+    {
+      ClearBackground(RAYWHITE);
+      // BeginMode2D();
+      {
+        DrawTexturePro(target->texture, sourceRec, destRec, (Vector2){0.0f, 0.0f}, 0.0f, WHITE);
+      }
+      // EndMode2D();
+    }
     EndDrawing();
     //----------------------------------------------------------------------------------
   }
 
   // De-Initialization
   //--------------------------------------------------------------------------------------
+  MemFree(target);
   CloseWindow(); // Close window and OpenGL context
   //--------------------------------------------------------------------------------------