fixed blending

Implementing noise blending

engine/world_generation/src/biome_painter.rs

@@ -64,6 +64,22 @@ impl BiomePainter {
 
 		return biome;
 	}
+
+	pub fn sample_biome_index(&self, data: &BiomeData) -> usize {
+		assert!(self.biomes.length() != 0, "There are no biomes");
+		let mut biome = 0;
+		let mut dist = f32::INFINITY;
+
+		for i in 0..self.biomes.len() {
+			let d = self.biomes[i].distance(data.into());
+			if d < dist {
+				biome = i;
+				dist = d;
+			}
+		}
+
+		return biome;
+	}
 }
 
 create_asset_loader!(

engine/world_generation/src/heightmap.rs

@@ -1,4 +1,4 @@
-use bevy::math::IVec2;
+use bevy::math::{IVec2, UVec2};
 use bevy::prelude::{FloatExt, Vec2};
 use bevy::utils::default;
 use bevy::utils::petgraph::data;
@@ -10,7 +10,7 @@ use crate::map::biome_map::{self, BiomeChunk, BiomeData, BiomeMap};
 use crate::prelude::*;
 
 pub fn generate_heightmap(cfg: &GenerationConfig, seed: u32, painter: &BiomePainter) -> Map {
-	let biomes = &generate_biomes(cfg, seed);
+	let biomes = &generate_biomes(cfg, seed, painter);
 	// let mut chunks: Vec<Chunk> = Vec::with_capacity(cfg.size.length_squared() as usize);
 	let chunks = (0..cfg.size.y)
 		.into_par_iter()
@@ -29,13 +29,13 @@ pub fn generate_heightmap(cfg: &GenerationConfig, seed: u32, painter: &BiomePain
 	};
 }
 
-pub fn generate_biomes(cfg: &GenerationConfig, seed: u32) -> BiomeMap {
-	let mut map = BiomeMap::new(cfg.size, 8);
+pub fn generate_biomes(cfg: &GenerationConfig, seed: u32, biome_painter: &BiomePainter) -> BiomeMap {
+	let mut map = BiomeMap::new(cfg.size, biome_painter.biomes.len());
 	map.chunks = (0..cfg.size.y)
 		.into_par_iter()
 		.flat_map(|y| {
 			(0..cfg.size.x).into_par_iter().map(move |x| {
-				return generate_biome_chunk(x as usize, y as usize, cfg, seed);
+				return generate_biome_chunk(x as usize, y as usize, cfg, seed, biome_painter);
 			})
 		})
 		.collect();
@@ -43,8 +43,15 @@ pub fn generate_biomes(cfg: &GenerationConfig, seed: u32) -> BiomeMap {
 	return map;
 }
 
-pub fn generate_biome_chunk(chunk_x: usize, chunk_y: usize, cfg: &GenerationConfig, seed: u32) -> BiomeChunk {
+pub fn generate_biome_chunk(
+	chunk_x: usize,
+	chunk_y: usize,
+	cfg: &GenerationConfig,
+	seed: u32,
+	biome_painter: &BiomePainter,
+) -> BiomeChunk {
 	let mut chunk = BiomeChunk {
+		offset: UVec2::new(chunk_x as u32, chunk_y as u32),
 		data: [BiomeData::default(); Chunk::AREA],
 		tiles: Vec::with_capacity(Chunk::AREA),
 	};
@@ -78,11 +85,16 @@ pub fn generate_biome_chunk(chunk_x: usize, chunk_y: usize, cfg: &GenerationConf
 				cfg.size.as_vec2(),
 				cfg.border_size,
 			);
-			chunk.data[x + z * Chunk::SIZE] = BiomeData {
-				moisture,
-				temperature,
-				continentality,
+			let data = BiomeData {
+				moisture: moisture.clamp(0., 100.),
+				temperature: temperature.clamp(0., 100.),
+				continentality: continentality.clamp(0., 100.),
 			};
+			let mut b = vec![0.; biome_painter.biomes.len()];
+			b[biome_painter.sample_biome_index(&data)] = 1.;
+
+			chunk.data[x + z * Chunk::SIZE] = data;
+			chunk.tiles.push(b);
 		}
 	}
 
@@ -103,15 +115,23 @@ pub fn generate_chunk(
 	for z in 0..Chunk::SIZE {
 		for x in 0..Chunk::SIZE {
 			let biome_data = biome_chunk.get_biome_data(x, z);
-			let biome = biome_painter.sample_biome(biome_data);
-			let sample = sample_point(
+			let biome_blend = biome_chunk.get_biome(x, z);
+			let mut sample = 0.;
+			for i in 0..biome_blend.len() {
+				let blend = biome_blend[i];
+				if blend == 0. {
+					continue;
+				}
+				let biome = &biome_painter.biomes[i];
+				sample += sample_point(
 					x as f64 + chunk_x as f64 * Chunk::SIZE as f64,
 					z as f64 + chunk_z as f64 * Chunk::SIZE as f64,
 					&biome.noise,
 					&noise,
 					cfg.size.as_vec2(),
 					cfg.border_size,
-			);
+				) * blend;
+			}
 			result[x + z * Chunk::SIZE] = sample;
 			data[x + z * Chunk::SIZE] = biome_data.clone();
 		}

engine/world_generation/src/map/biome_map.rs

@@ -6,6 +6,7 @@ use super::chunk::Chunk;
 pub struct BiomeMap {
 	pub height: usize,
 	pub width: usize,
+	pub size: UVec2,
 	pub biome_count: usize,
 	pub chunks: Vec<BiomeChunk>,
 }
@@ -33,6 +34,7 @@ impl BiomeMap {
 	pub fn new(size: UVec2, biome_count: usize) -> Self {
 		let len = size.x as usize * size.y as usize * Chunk::AREA;
 		return BiomeMap {
+			size: size,
 			height: size.y as usize * Chunk::SIZE,
 			width: size.x as usize * Chunk::SIZE,
 			biome_count,
@@ -57,7 +59,10 @@ impl BiomeMap {
 					.map(|y| {
 						let mut new_tiles = Vec::with_capacity(self.width);
 						for x in 0..Chunk::SIZE {
-							let kernel = self.get_kernel(x as i32, y as i32);
+							let tx = x as u32 + chunk.offset.x * Chunk::SIZE as u32;
+							let ty = y as u32 + chunk.offset.y * Chunk::SIZE as u32;
+							let kernel = self.get_kernel(tx as i32, ty as i32);
+
 							let r = kernel
 								.iter()
 								.filter_map(|f| *f)
@@ -77,6 +82,7 @@ impl BiomeMap {
 					.flatten()
 					.collect();
 				return BiomeChunk {
+					offset: chunk.offset,
 					tiles,
 					data: chunk.data,
 				};
@@ -107,27 +113,27 @@ impl BiomeMap {
 			return None;
 		}
 
-		let cx = x as usize / Chunk::SIZE;
-		let cy = y as usize / Chunk::SIZE;
-
-		let chunk = &self.chunks[cx + cy * Chunk::SIZE];
+		let cx = (x as f32 / Chunk::SIZE as f32).floor() as usize;
+		let cy = (y as f32 / Chunk::SIZE as f32).floor() as usize;
 
+		let chunk = &self.chunks[cx + cy * self.size.x as usize];
 		return Some(chunk.get_biome(x as usize - cx * Chunk::SIZE, y as usize - cy * Chunk::SIZE));
 	}
 
 	pub fn get_biome_data(&self, x: usize, y: usize) -> &BiomeData {
-		let cx = x / Chunk::SIZE;
-		let cy = y / Chunk::SIZE;
+		let cx = (x as f32 / Chunk::SIZE as f32).floor() as usize;
+		let cy = (y as f32 / Chunk::SIZE as f32).floor() as usize;
 
-		let chunk = &self.chunks[cx + cy * Chunk::SIZE];
+		let chunk = &self.chunks[cx + cy * self.size.x as usize];
 
-		return chunk.get_biome_data(x - cx * Chunk::SIZE, y - cy * Chunk::SIZE);
+		return chunk.get_biome_data(x - (cx * Chunk::SIZE), y - (cy * Chunk::SIZE));
 	}
 }
 
 #[derive(Clone)]
 pub struct BiomeChunk {
 	pub tiles: Vec<Vec<f32>>,
+	pub offset: UVec2,
 	pub data: [BiomeData; Chunk::AREA],
 }
 
@@ -148,9 +154,9 @@ mod tests {
 
 	#[test]
 	fn biome_blend() {
-		let mut biome = BiomeMap::new(UVec2::ONE * 16, 8);
-		let w = biome.width / Chunk::SIZE;
-		let h = biome.height / Chunk::SIZE;
+		let mut biome = BiomeMap::new(UVec2::splat(4), 8);
+		let w = biome.size.x as usize;
+		let h = biome.size.y as usize;
 
 		for y in 0..h {
 			for x in 0..w {
@@ -162,10 +168,12 @@ mod tests {
 		}
 
 		biome.blend(8);
+		assert!(biome.chunks.iter().all(|f| f.tiles.len() == Chunk::AREA), "Data Lost");
 	}
 
 	fn generate_chunk(x: usize, y: usize, biome: Vec<f32>) -> BiomeChunk {
 		let chunk = BiomeChunk {
+			offset: UVec2::new(x as u32, y as u32),
 			data: [BiomeData::default(); Chunk::AREA],
 			tiles: (0..Chunk::AREA).into_iter().map(|_| biome.clone()).collect(),
 		};

game/buildings/src/building_plugin.rs

@@ -16,7 +16,7 @@ impl Plugin for BuildingPugin {
 		app.insert_resource(BuildQueue::default());
 
 		app.add_systems(Startup, init);
-		app.add_systems(Update, hq_placement.run_if(in_state(GameplayState::PlaceHQ)));
+		//app.add_systems(Update, hq_placement.run_if(in_state(GameplayState::PlaceHQ)));
 
 		app.add_systems(PreUpdate, process_build_queue.run_if(in_state(GameplayState::Playing)));
 	}

game/main/src/map_rendering/map_init.rs

@@ -206,19 +206,19 @@ fn create_heightmap(
 	biome_painter: Res<BiomePainter>,
 ) {
 	let config = GenerationConfig {
-		biome_blend: 3,
+		biome_blend: 16,
 		continent_layer: NoiseConfig {
 			scale: 450.,
 			layers: vec![GeneratorLayer {
 				base_roughness: 2.14,
 				roughness: 0.87,
 				strength: 100.,
-				min_value: -0.2,
+				min_value: 0.,
 				persistence: 0.77,
 				is_rigid: false,
 				weight: 0.,
 				weight_multi: 0.,
-				layers: 4,
+				layers: 1,
 				first_layer_mask: false,
 			}],
 		},
@@ -228,12 +228,12 @@ fn create_heightmap(
 				base_roughness: 2.14,
 				roughness: 0.87,
 				strength: 100.,
-				min_value: -0.2,
+				min_value: 0.,
 				persistence: 0.77,
 				is_rigid: false,
 				weight: 0.,
 				weight_multi: 0.,
-				layers: 4,
+				layers: 1,
 				first_layer_mask: false,
 			}],
 		},
@@ -243,18 +243,18 @@ fn create_heightmap(
 				base_roughness: 2.14,
 				roughness: 0.87,
 				strength: 100.,
-				min_value: -0.2,
+				min_value: 0.,
 				persistence: 0.77,
 				is_rigid: false,
 				weight: 0.,
 				weight_multi: 0.,
-				layers: 4,
+				layers: 1,
 				first_layer_mask: false,
 			}],
 		},
 		sea_level: 8.5,
 		border_size: 64.,
-		size: UVec2::splat(1024 / Chunk::SIZE as u32),
+		size: UVec2::splat(16),
 		// size: UVec2::splat(1),
 	};
 	let heightmap = generate_heightmap(&config, 42069, &biome_painter);