/**
* Generate the local contents of a chunk. This should be purely deterministic from the chunk
* contents, chunk position and world seed - should not depend on external state or other data.
*
* @param c
*/
public void generateChunk(Chunk c) {
int hm_x = (((c.getChunkWorldPosX() / Chunk.SIZE_X) % 512) + 512) % 512;
int hm_z = (((c.getChunkWorldPosZ() / Chunk.SIZE_Z) % 512) + 512) % 512;
double scaleFactor = 0.05 * Chunk.SIZE_Y;
double p00 = heightmap[hm_x][hm_z] * scaleFactor;
double p10 = heightmap[(hm_x - 1 + 512) % 512][(hm_z) % 512] * scaleFactor;
double p11 = heightmap[(hm_x - 1 + 512) % 512][(hm_z + 1 + 512) % 512] * scaleFactor;
double p01 = heightmap[(hm_x) % 512][(hm_z + 1 + 512) % 512] * scaleFactor;
for (int x = 0; x < Chunk.SIZE_X; x++) {
for (int z = 0; z < Chunk.SIZE_Z; z++) {
WorldBiomeProvider.Biome type =
biomeProvider.getBiomeAt(c.getBlockWorldPosX(x), c.getBlockWorldPosZ(z));
// calculate avg height
double interpolatedHeight =
lerp(
x / (double) Chunk.SIZE_X,
lerp(z / (double) Chunk.SIZE_Z, p10, p11),
lerp(z / (double) Chunk.SIZE_Z, p00, p01));
// Scale the height to fit one chunk (suppose we have max height 20 on the Heigthmap
// ToDo: Change this formula in later implementation of vertical chunks
double threshold = Math.floor(interpolatedHeight);
for (int y = Chunk.SIZE_Y - 1; y >= 0; y--) {
if (y == 0) { // The very deepest layer of the world is an
// indestructible mantle
c.setBlock(x, y, z, mantle);
break;
} else if (y < threshold) {
c.setBlock(x, y, z, stone);
} else if (y == threshold) {
if (y < Chunk.SIZE_Y * 0.05 + 1) {
c.setBlock(x, y, z, sand);
} else if (y < Chunk.SIZE_Y * 0.05 * 12) {
c.setBlock(x, y, z, grass);
} else {
c.setBlock(x, y, z, snow);
}
} else {
if (y <= Chunk.SIZE_Y / 20) { // Ocean
c.setBlock(x, y, z, water);
c.setLiquid(x, y, z, new LiquidData(LiquidType.WATER, Chunk.MAX_LIQUID_DEPTH));
} else {
c.setBlock(x, y, z, air);
}
}
}
}
}
}
