toby/worlds-history-sim-rs
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Tweak rain gen

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c1d6e373680566d005177b6b85d26135c4f0d5f6
This commit is contained in:
Tobias Berger 2022-09-18 18:07:55 +02:00
parent 8df06365a7
commit 6a17e6df7b
Signed by: toby
GPG key ID: 2D05EFAB764D6A88
3 changed files with 400444 additions and 17 deletions
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400410
planet.ron
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File diff suppressed because one or more lines are too long

38
planet/src/world.rs
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@ -325,33 +325,49 @@ impl World {
fn generate_rainfall(&mut self) -> Result<(), CartesianError> {
info!("Generating rainfall");
// let offset = World::random_offset_vector(&mut self.rng);
const RADIUS: f32 = 2.0;
let offset = World::random_offset_vector(&mut self.rng);
let height = self.terrain.len();
for y in 0..height {
info!("Rainfall: {}/{}", y, height);
let alpha = (y as f32 / self.height as f32) * PI;
let latitude_modifier = f32::sin(2.0 * alpha);
let width = self.terrain[y].len();
for x in 0..width {
// let beta = (x as f32 / self.width as f32) * TAU;
let beta = (x as f32 / self.width as f32) * TAU;
let diff_cell_x =
(width + x + f32::floor(latitude_modifier * width as f32 / 50.0) as usize)
let random_noise =
self.random_noise_from_polar_coordinates(alpha, beta, RADIUS, offset)?;
let latitude_factor = (alpha * 0.9) + (random_noise * 0.2 * PI) - 0.1;
let latitude_modifier_1 = (1.5 * f32::sin(latitude_factor)) - 0.5;
let latitude_modifier_2 = f32::cos(latitude_factor);
let offset_cell_x =
(width + x + f32::floor(latitude_modifier_2 * width as f32 / 20.0) as usize)
% width;
let offset_cell_2_x =
(width + x + f32::floor(latitude_modifier_2 * width as f32 / 10.0) as usize)
% width;
let diff_cell = &self.terrain[y][diff_cell_x];
let diff_altitude = f32::max(0.0, diff_cell.altitude);
let mut cell = &mut self.terrain[y][x];
let offset_cell = &self.terrain[y][offset_cell_x];
let offset_altitude = f32::max(0.0, offset_cell.altitude);
let offset_cell_2 = &self.terrain[y][offset_cell_2_x];
let offset_altitude_2 = f32::max(0.0, offset_cell_2.altitude);
let cell = &mut self.terrain[y][x];
let altitude = f32::max(0.0, cell.altitude);
let altitude_factor =
f32::max(0.0, 2.0 * (altitude - diff_altitude) / World::MAX_ALTITUDE);
let altitude_modifier =
(altitude - (offset_altitude * 1.5) - (offset_altitude_2 * 1.5))
/ World::MAX_ALTITUDE;
let normalized_rainfall = mix_values(latitude_modifier_1, altitude_modifier, 0.6);
let rainfall = f32::min(
World::MAX_RAINFALL,
World::calculate_rainfall(altitude_factor),
World::calculate_rainfall(normalized_rainfall),
);
cell.rainfall = rainfall;

13
planet/src/world_manager.rs
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@ -308,11 +308,14 @@ impl WorldManager {
#[cfg(feature = "render")]
fn rainfall_contour_color(&self, rainfall: f32) -> Color {
Color::rgb(
0.0,
f32::floor((rainfall / self.world().max_rainfall) / 0.1),
0.0,
)
let mut shade_value = 1.0;
let value = rainfall / self.world().max_rainfall;
while shade_value > value {
shade_value -= 0.1;
}
Color::rgb(0.0, shade_value, 0.0)
}
#[cfg(feature = "render")]