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Add plant and aquatic variety

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chelsea
2026-05-02 23:18:00 -05:00
parent d0f3c9a048
commit 335b35d416
4 changed files with 80 additions and 9 deletions
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69
worldgen-c/src/worldgen.c
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@@ -137,6 +137,7 @@ static void generate_chunk_redwood_floor(worldgen_ctx *ctx, int chunk_x, int chu
column_data columns[CHUNK_SIZE][CHUNK_SIZE], chunk_data *chunk);
static void generate_chunk_grass(worldgen_ctx *ctx, int chunk_x, int chunk_z, column_data columns[CHUNK_SIZE][CHUNK_SIZE], chunk_data *out);
static void generate_chunk_flowers(worldgen_ctx *ctx, int chunk_x, int chunk_z, column_data columns[CHUNK_SIZE][CHUNK_SIZE], chunk_data *out);
static void generate_chunk_aquatic_life(worldgen_ctx *ctx, int chunk_x, int chunk_z, column_data columns[CHUNK_SIZE][CHUNK_SIZE], chunk_data *out);
static void generate_chunk_cabins(worldgen_ctx *ctx, int chunk_x, int chunk_z, column_data columns[CHUNK_SIZE][CHUNK_SIZE], chunk_data *out);
static void generate_chunk_border_wall(worldgen_ctx *ctx, int chunk_x, int chunk_z, chunk_data *out);
static void ensure_trail_prepass(worldgen_ctx *ctx, int chunk_x, int chunk_z);
@@ -939,8 +940,18 @@ static int generate_coal(worldgen_ctx *ctx, int x, int y, int z, int column_heig
static uint16_t select_surface_block(worldgen_ctx *ctx, const column_data *data, int world_x, int world_z) {
if (data->has_water && data->water_surface >= data->height) {
int slope = ground_slope(ctx, world_x, world_z);
if (slope <= 1) return BLOCK_SAND;
if (slope <= 3) return BLOCK_GRAVEL;
double shelf = simplex_noise2(&ctx->noise, (world_x + 45000) * 0.025, (world_z - 45000) * 0.025) * 0.5 + 0.5;
double basin = simplex_noise2(&ctx->noise, (world_x - 23000) * 0.007, (world_z + 23000) * 0.007) * 0.5 + 0.5;
int depth = data->water_surface - data->height;
if (slope <= 1) {
if (depth >= 3 && basin > 0.74) return BLOCK_CLAY;
if (shelf > 0.76) return BLOCK_GRAVEL;
return BLOCK_SAND;
}
if (slope <= 3) {
if (depth >= 4 && basin > 0.82) return BLOCK_CLAY;
return (shelf > 0.44) ? BLOCK_GRAVEL : BLOCK_SAND;
}
return BLOCK_STONE;
}
int snow_line = ctx->snow_line;
@@ -1870,7 +1881,7 @@ static void generate_chunk_redwood_floor(worldgen_ctx *ctx, int chunk_x, int chu
double litter = simplex_noise2(&ctx->noise, (wx + 8000) * 0.03, (wz - 8000) * 0.03) * 0.5 + 0.5;
double fern_chance = clamp01(0.25 + rain * 0.5 + (1.0 - litter) * 0.25);
if (chunk->blocks[cd.height + 1][dx][dz] == BLOCK_AIR && rng_next_f64(&rng) < fern_chance) {
chunk->blocks[cd.height + 1][dx][dz] = BLOCK_TALL_GRASS;
chunk->blocks[cd.height + 1][dx][dz] = (rain > 0.55 || rng_next_f64(&rng) < 0.45) ? BLOCK_FERN : BLOCK_TALL_GRASS;
}
if (rng_next_f64(&rng) < 0.0035) {
try_place_redwood_fallen_log(ctx, chunk_x, chunk_z, chunk, columns, dx, dz, &rng);
@@ -1901,7 +1912,7 @@ static void generate_chunk_grass(worldgen_ctx *ctx, int chunk_x, int chunk_z, co
uint32_t h = hash_coords(world_x, world_z, (uint32_t)(ctx->world_seed ^ 0x5F3759DFu));
double roll = (double)(h & 0xFFFF) / 65535.0;
if (roll > chance) continue;
out->blocks[cd.height + 1][dx][dz] = BLOCK_TALL_GRASS;
out->blocks[cd.height + 1][dx][dz] = (humidity > 0.72 && rain > 0.45) ? BLOCK_FERN : BLOCK_TALL_GRASS;
if (roll < chance * 0.4) {
const int offsets[4][2] = {{1, 0}, {-1, 0}, {0, 1}, {0, -1}};
for (int i = 0; i < 4; ++i) {
@@ -1912,7 +1923,7 @@ static void generate_chunk_grass(worldgen_ctx *ctx, int chunk_x, int chunk_z, co
if (nd.height <= 0 || nd.height >= CHUNK_HEIGHT - 1) continue;
if (out->blocks[nd.height][nx][nz] != BLOCK_GRASS) continue;
if (out->blocks[nd.height + 1][nx][nz] != BLOCK_AIR) continue;
out->blocks[nd.height + 1][nx][nz] = BLOCK_TALL_GRASS;
out->blocks[nd.height + 1][nx][nz] = ((h >> (i + 3)) & 1u) ? BLOCK_TALL_GRASS : BLOCK_FERN;
}
}
}
@@ -1942,7 +1953,17 @@ static void generate_chunk_flowers(worldgen_ctx *ctx, int chunk_x, int chunk_z,
uint32_t h = hash_coords(world_x + 30000, world_z - 30000, (uint32_t)(ctx->world_seed ^ 0xA511E9B5u));
double roll = (double)(h & 0xFFFF) / 65535.0;
if (roll > chance) continue;
out->blocks[cd.height + 1][dx][dz] = BLOCK_WILDFLOWER;
uint16_t flower = BLOCK_WILDFLOWER;
uint32_t flower_hash = hash_coords(world_x - 17000, world_z + 17000, (uint32_t)(ctx->world_seed ^ 0xB10F00Du));
switch ((flower_hash >> 8) % 6) {
case 0: flower = BLOCK_DANDELION; break;
case 1: flower = BLOCK_AZURE_BLUET; break;
case 2: flower = BLOCK_OXEYE_DAISY; break;
case 3: flower = BLOCK_CORNFLOWER; break;
case 4: flower = BLOCK_LILY_OF_THE_VALLEY; break;
default: flower = BLOCK_WILDFLOWER; break;
}
out->blocks[cd.height + 1][dx][dz] = flower;
static const int offsets[4][2] = {{1, 0}, {-1, 0}, {0, 1}, {0, -1}};
for (int i = 0; i < 4; ++i) {
int nx = dx + offsets[i][0];
@@ -1954,7 +1975,40 @@ static void generate_chunk_flowers(worldgen_ctx *ctx, int chunk_x, int chunk_z,
if (out->blocks[nd.height + 1][nx][nz] != BLOCK_AIR) continue;
uint32_t nh = hash_coords(world_x + offsets[i][0] + 60000, world_z + offsets[i][1] - 60000, (uint32_t)(ctx->world_seed ^ 0xF00DBAAu));
if ((nh & 0xFFFF) > 24000) continue;
out->blocks[nd.height + 1][nx][nz] = BLOCK_WILDFLOWER;
uint16_t patch_flower = flower;
if ((nh & 7u) == 0u) patch_flower = BLOCK_DANDELION;
out->blocks[nd.height + 1][nx][nz] = patch_flower;
}
}
}
}
static void generate_chunk_aquatic_life(worldgen_ctx *ctx, int chunk_x, int chunk_z, column_data columns[CHUNK_SIZE][CHUNK_SIZE], chunk_data *out) {
for (int dx = 0; dx < CHUNK_SIZE; ++dx) {
for (int dz = 0; dz < CHUNK_SIZE; ++dz) {
column_data cd = columns[dx][dz];
if (!cd.has_water || cd.water_surface <= cd.height) continue;
if (cd.height <= 0 || cd.height >= CHUNK_HEIGHT - 2) continue;
int depth = cd.water_surface - cd.height;
if (depth < 1 || depth > 9) continue;
int world_x = chunk_x * CHUNK_SIZE + dx;
int world_z = chunk_z * CHUNK_SIZE + dz;
uint16_t floor = out->blocks[cd.height][dx][dz];
if (floor != BLOCK_SAND && floor != BLOCK_GRAVEL && floor != BLOCK_CLAY && floor != BLOCK_DIRT) continue;
if (out->blocks[cd.height + 1][dx][dz] != BLOCK_WATER) continue;
double bed = simplex_noise2(&ctx->noise, (world_x + 70000) * 0.035, (world_z - 70000) * 0.035) * 0.5 + 0.5;
double patch = simplex_noise2(&ctx->noise, (world_x - 15000) * 0.011, (world_z + 15000) * 0.011) * 0.5 + 0.5;
double chance = 0.08 + patch * 0.24;
if (floor == BLOCK_CLAY) chance += 0.10;
if (depth <= 3) chance += 0.12;
if (ground_slope(ctx, world_x, world_z) > 2) chance *= 0.35;
uint32_t h = hash_coords(world_x, world_z, (uint32_t)(ctx->world_seed ^ 0x5EA6A55u));
double roll = (double)(h & 0xFFFF) / 65535.0;
if (roll > clamp01(chance)) continue;
out->blocks[cd.height + 1][dx][dz] = BLOCK_SEAGRASS;
if (depth >= 3 && bed > 0.78 && cd.height + 2 < CHUNK_HEIGHT &&
out->blocks[cd.height + 2][dx][dz] == BLOCK_WATER) {
out->blocks[cd.height + 2][dx][dz] = BLOCK_SEAGRASS;
}
}
}
@@ -3852,6 +3906,7 @@ void worldgen_generate_chunk(worldgen_ctx *ctx, int chunk_x, int chunk_z, chunk_
generate_chunk_redwood_floor(ctx, chunk_x, chunk_z, columns, out);
generate_chunk_grass(ctx, chunk_x, chunk_z, columns, out);
generate_chunk_flowers(ctx, chunk_x, chunk_z, columns, out);
generate_chunk_aquatic_life(ctx, chunk_x, chunk_z, columns, out);
// Tree overlay
block_list trees;