More biomes and decos.

1 files changed, 90 insertions, 29 deletions

diff --git a/src/game/worldgen.cpp b/src/game/worldgen.cpp
index f7d4757..8a6addf 100644
--- a/src/game/worldgen.cpp
+++ b/src/game/worldgen.cpp
@@ -4,9 +4,9 @@ namespace game {
 
 using namespace world;
 
-static void add_entity(world_t *world, state_t *game, v2f_t x)
+static void add_entity(uint8_t tile_type, world_t *world, state_t *game, v2f_t x)
 {
-	float noise;
+	float noise, noise_nest, noise_spider;
 	deco_t *deco;
 	deco_type_t type;
 	v2f_t center, offset;
@@ -14,33 +14,77 @@ static void add_entity(world_t *world, state_t *game, v2f_t x)
 	noise = world->perlin.get(x, 0.53213f) + world->perlin.get(x, 0.12994f);
 	noise = fabs(noise / 2);
 
-	if (noise < 0.16)
-		return;
-
 	offset[0] = world->perlin.get(x, 0.17331f);
 	offset[1] = world->perlin.get(x, 0.19571f);
 	center = x + v2f_t(0.5f, 0.5f) + offset.norm() * 0.1;
 
-	if (noise > 0.42) {
+	switch (tile_type) {
+	case TILE_DIRT:
+		noise_nest = 0.42f;
+		noise_spider = 0.39f;
+		break;
+
+	case TILE_DIRT_RED:
+		noise_nest = 0.45f;
+		noise_spider = 0.41f;
+		break;
+
+	case TILE_GRAVEL:
+		noise_nest = 0.36f;
+		noise_spider = 0.33f;
+		break;
+
+	default:
+		goto just_decos;
+	}
+
+
+	if (noise > noise_nest) {
 		unit_nest_t *nest = new unit_nest_t(game);
 		nest->place(world, center);
 		return;
-	} else if (noise > 0.39) {
+	} else if (noise > noise_spider) {
 		unit_spider_t *spider = new unit_spider_t(game);
 		spider->place(world, center);
 		return;
 	}
 
-	if (noise > 0.36)
-		type = DECO_EYETHING;
-	else if (noise > 0.33)
-		type = DECO_STONE;
-	else if (noise > 0.26)
-		type = DECO_SPIKE;
-	else if (noise > 0.20)
-		type = DECO_SPIKE_SMALL;
-	else
-		type = DECO_STONE_SMALL;
+just_decos:
+	switch (tile_type) {
+	case TILE_DIRT_RED:
+		if (noise > 0.21)
+			type = DECO_EYETHING;
+		else if (noise > 0.08)
+			type = DECO_WART;
+		else
+			return;
+		break;
+
+	case TILE_DIRT:
+		if (noise > 0.33)
+			type = DECO_STONE;
+		else if (noise > 0.26)
+			type = DECO_SPIKE;
+		else if (noise > 0.20)
+			type = DECO_SPIKE_SMALL;
+		else if (noise > 0.16)
+			type = DECO_STONE_SMALL;
+		else
+			return;
+		break;
+
+	case TILE_GRAVEL:
+		if (noise > 0.30)
+			type = DECO_STONE;
+		else if (noise > 0.13)
+			type = DECO_STONE_SMALL;
+		else
+			return;
+		break;
+
+	default:
+		return;
+	}
 
 	deco = new deco_t(game, type);
 	deco->phase_shift = offset[0] * 500.0;
@@ -61,27 +105,46 @@ void worldgen(world_t *world, sector_index_t index, sector_t *sector,
 		tile_index_t tile_index(index[0] * SECTOR_SIZE + lx,
 		                        index[1] * SECTOR_SIZE + ly);
 		v2f_t x;
-		float waterlevel, height;
+		float biome, waterlevel, height;
 
 		x = v2f_t(index) * SECTOR_SIZE + v2f_t(lx, ly);
 
 		waterlevel = world->perlin.get(x, 1000.0f) * 0.3f +
 			     world->perlin.get(x, 500.0f) * 0.1f;
 
+		biome = world->perlin.get(x - v2f_t(60, 20), 160.0f) * 0.4f +
+		        world->perlin.get(x, 30.0f) * 0.2f +
+		        world->perlin.get(x, 5.0f) * 0.03f;
+
+
 		height = world->perlin.get(x, 40.0f) * 0.6f +
 			 world->perlin.get(x, 20.0f) * 0.25f +
 			 world->perlin.get(x, 10.0f) * 0.2f +
 			 world->perlin.get(x, 4.0f) * 0.1f +
 			 world->perlin.get(x, 1.0f) * 0.05f;
 
-		if (height < waterlevel)
-			tile->type = TILE_WATER;
-		else if (height < waterlevel + 0.1)
-			tile->type = TILE_DIRT;
-		else if (world->perlin.get(x, 3.0f) > 0.0f)
-			tile->type = TILE_STONE;
-		else
-			tile->type = TILE_DIRT;
+		if (biome < 0.0f) {
+			if (height < waterlevel)
+				tile->type = TILE_WATER;
+			else if (height < waterlevel + 0.1)
+				tile->type = TILE_DIRT;
+			else if (world->perlin.get(x, 3.0f) > 0.0f)
+				tile->type = TILE_STONE;
+			else
+				tile->type = TILE_DIRT;
+		} else if (biome < 0.1f) {
+			if (height < waterlevel - 0.07f)
+				tile->type = TILE_STONE;
+			else
+				tile->type = TILE_GRAVEL;
+		} else {
+			if (height < waterlevel)
+				tile->type = TILE_DIRT_RED;
+			else if (world->perlin.get(x, 3.0f) > 0.0f)
+				tile->type = TILE_STONE_RED;
+			else
+				tile->type = TILE_DIRT_RED;
+		}
 	}
 
 decos:
@@ -96,9 +159,7 @@ decos:
 		v2f_t x;
 
 		x = v2f_t(index) * SECTOR_SIZE + v2f_t(lx, ly);
-
-		if (tile->type == TILE_DIRT)
-			add_entity(world, game, x);
+		add_entity(tile->type, world, game, x);
 	}
 }