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refactor: prevent desert from generation adjacent to mountain in biome generation

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zhenyan121
2026-04-17 22:22:18 +08:00
parent e69d38ad94
commit f2328d19fd
5 changed files with 38 additions and 28 deletions
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8
src/gameplay/chunk.cpp
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@@ -280,16 +280,10 @@ void Chunk::resolve_blocks() {
float world_x = static_cast<float>(x + m_chunk_pos.x * CHUCK_SIZE);
float world_z = static_cast<float>(z + m_chunk_pos.z * CHUCK_SIZE);
float biome_noise = PerlinNoise::noise(
world_x * BIOME_NOISE_FREQUENCY,
0.5f,
world_z * BIOME_NOISE_FREQUENCY
);
float temp = PerlinNoise::noise(world_x * BIOME_NOISE_FREQUENCY, 0.0f, world_z * BIOME_NOISE_FREQUENCY);
float humid = PerlinNoise::noise(world_x * BIOME_NOISE_FREQUENCY, 1.0f, world_z * BIOME_NOISE_FREQUENCY);
int height = Math::get_interpolated_height(world_x, world_z, biome_noise, temp, humid);
int height = Math::get_interpolated_height(world_x, world_z, temp, humid);
auto biome = get_biome_from_noise(temp, humid);
for (int y = 5; y < height - 5; y++) {
m_blocks[get_index(x, y, z)] = 3;

17
src/tools/math_tools.cpp
View File

@@ -34,9 +34,8 @@ namespace Math {
}
}
int get_interpolated_height(float world_x, float world_z, float biome_noise, float temp, float humid) {
int get_interpolated_height(float world_x, float world_z, float temp, float humid) {
auto weight = [](float t, float h, float ct, float ch) -> float {
float dt = t - ct;
float dh = h - ch;
@@ -44,16 +43,16 @@ namespace Math {
return std::max(0.0f, 0.5f - dist);
};
float w_mountain = weight(temp, humid, 0.25f, 0.25f);
float w_plain = weight(temp, humid, 0.25f, 0.75f);
float w_desert = weight(temp, humid, 0.75f, 0.25f);
float w_mountain = weight(temp, humid, 0.25f, 0.15f);
float w_plain = weight(temp, humid, 0.50f, 0.40f);
float w_desert = weight(temp, humid, 0.75f, 0.15f);
float w_forest = weight(temp, humid, 0.75f, 0.75f);
// adjust transitions between chunks
float pow_n = 8.0f; // the larger n is, the purer the biome
w_mountain = std::pow(w_mountain, pow_n);
w_plain = std::pow(w_plain, pow_n);
w_desert = std::pow(w_desert, pow_n);
w_forest = std::pow(w_forest, pow_n);
w_mountain = std::pow(w_mountain, pow_n) * MOUNTAIN_FREQ;
w_plain = std::pow(w_plain, pow_n) * PLAIN_FREQ;
w_desert = std::pow(w_desert, pow_n) * DESERT_FREQ;
w_forest = std::pow(w_forest, pow_n) * FOREST_FREQ;
float total = w_mountain + w_plain + w_desert + w_forest;
w_mountain /= total; w_plain /= total; w_desert /= total; w_forest /= total;