/// <summary>
/// Algarithim that helps to decide where the gereration is allowed to put textures on voxels, caves, biomes and ect
/// </summary>
public byte GetVoxel(Vector3 pos)
{
int yPos = Mathf.FloorToInt(pos.y);
/* MUST CALL */
// If outside world bounds, return air voxel ID
if (!IsVoxelInWorld(pos))
{
return(0);
}
// If bottom block of chunk, return bedrock voxel ID
if (yPos == 0)
{
return(6);
}
/* BIOME SELECTION */
/// <summary>
/// Below <see cref="solidGroundHeight"/> is always solid ground.
/// </summary>
int solidGroundHeight = 20;
float sumOfHeights = 0;
int count = 0;
float strongestWeight = 0;
int strongestBiomeIndex = 0;
for (int i = 0; i < biomes.Length; i++)
{
float weight = VoxelData.Get2DPerlin(new Vector2(pos.x, pos.z), biomes[i].offset, biomes[i].scale);
// Is the weight the strongest of all the biomes
if (weight > strongestWeight)
{
strongestWeight = weight;
strongestBiomeIndex = i;
}
// Get the height of the current terrain and multiply by the weight to apply smoothing between biomes
float height = biomes[i].terrainHeight * VoxelData.Get2DPerlin(new Vector2(pos.x, pos.z), 0, biomes[i].terrainScale) * weight;
if (height > 0)
{
sumOfHeights += height;
count++;
}
}
// Set Biome
BiomeAttributes biome = biomes[strongestBiomeIndex];
// Get average heights
sumOfHeights /= count;
// Converts a 0 to 1 value into a percentage that gets multiplied by the heignt to create terrain
int terrainHeight = Mathf.FloorToInt(sumOfHeights + solidGroundHeight);
/* BASIC TERRAIN */
byte voxelValue = 0;
// If top block of chunk, return stone voxel ID. Else if heigher then top block return air voxel ID
if (yPos == terrainHeight)
{
voxelValue = biome.surfaceBlockID;
}
else if (yPos < terrainHeight && yPos > terrainHeight - 4)
{
voxelValue = biome.subSurfaceBlockID;
}
else if (yPos > terrainHeight)
{
return(0);
}
else
{
voxelValue = 5;
}
if ((voxelValue == biome.surfaceBlockID || voxelValue == biome.surfaceBlockID || voxelValue == 5) && biome.lodes.Length > 0)
{
foreach (Lode lode in biome.lodes)
{
if (yPos > lode.minHeight && yPos < lode.maxHeight)
{
if (VoxelData.Get3DPerlin(pos, lode.noiseOffset, lode.scale, lode.threshold))
{
voxelValue = lode.blockID;
}
}
}
}
return(voxelValue);
}
