New structure

[dragonblocks3d.git] / src / mapgen.cpp

diff --git a/src/mapgen.cpp b/src/mapgen.cpp
new file mode 100644 (file)
index 0000000..5cad82c
--- /dev/null
+++ b/src/mapgen.cpp
@@ -0,0 +1,35 @@
+#include <iostream>
+#include <glm/gtc/noise.hpp>
+#include "mapgen.hpp" 
+
+using namespace glm;
+using namespace dragonblocks;
+
+Chunk::Data Mapgen::generate(const ivec3 &chunkp) const
+{
+       Chunk::Data data;
+       vec3 minp = chunkp * ivec3(DRAGONBLOCKS_CHUNK_SIZE);
+       vec3 maxp = minp + vec3(DRAGONBLOCKS_CHUNK_SIZE);
+       int minx = minp.x, miny = minp.y, minz = minp.z, maxx = maxp.x, maxy = maxp.y, maxz = maxp.z;
+       for (int x = minx; x < maxx; x++) {
+               int rx = x - minx;
+               for (int z = minz; z < maxz; z++) {
+                       int rz = z - minz;
+                       int grass_layer = grass_layer_middle + grass_layer_range * perlin(vec2((float)x / 64, (float)z / 64));
+                       for (int y = miny; y < maxy; y++) {
+                               int ry = y - miny;
+                               BlockDef *blockdef;
+                               if (y < grass_layer - 4)
+                                       blockdef = stone_def;
+                               else if (y < grass_layer - 1)
+                                       blockdef = dirt_def;
+                               else if (y < grass_layer)
+                                       blockdef = grass_def;
+                               else
+                                       blockdef = air_def;
+                               data.blocks[rx][ry][rz] = blockdef;
+                       }
+               }
+       }
+       return data;
+}