// functions to get & set voxels at world positions
public Block GetBlockAt(Vector3 worldPos)
{
worldPos -= m_WorldMin; // offset from origin
return(m_WorldData.GetBlock(
(int)(worldPos.x / m_BlockSize),
(int)(worldPos.y / m_BlockSize),
(int)(worldPos.z / m_BlockSize)
));
}
// Buid the mesh for a given block within a chunk
private int BuildMeshForBlock(int blockX, int blockY, int blockZ, int x, int y, int z, Chunk chunk, int index)
{
Block currentBlock = chunk.Blocks[x, y, z];
// if it isn't a transparent block then bail because it won't have any faces to build
if ((currentBlock.IsTransparent() == false))
return index;
byte lightAmount = 255;//currentBlock.LightAmount;
// Check surround blocks, if they aren't transparent then they have an outside face
// Bottom
Block block = m_WorldData.GetBlock(blockX, blockY - 1, blockZ);
if (block.IsTransparent() == false)
{
AddBlockFace( new IntVec3(x + 1, y, z), new IntVec3(x + 1, y, z + 1),
new IntVec3(x, y, z + 1), new IntVec3(x, y, z),
0.5f, chunk, index, block.m_Type, BlockFace.Bottom, lightAmount);
index += 4;
}
// West
block = m_WorldData.GetBlock(blockX - 1, blockY, blockZ);
if (block.IsTransparent() == false)
{
AddBlockFace(new IntVec3(x, y, z),
new IntVec3(x, y, z + 1),
new IntVec3(x, y + 1, z + 1),
new IntVec3(x, y + 1, z),
0.8f, chunk, index, block.m_Type, BlockFace.West, lightAmount);
index += 4;
}
// Top
block = m_WorldData.GetBlock(blockX, blockY + 1, blockZ);
if (block.IsTransparent() == false)
{
AddBlockFace(new IntVec3(x, y + 1, z),
new IntVec3(x, y + 1, z + 1),
new IntVec3(x + 1, y + 1, z + 1),
new IntVec3(x + 1, y + 1, z),
0.9f, chunk, index, block.m_Type, BlockFace.Top, lightAmount);
index += 4;
}
// East
block = m_WorldData.GetBlock(blockX + 1, blockY, blockZ);
if (block.IsTransparent() == false)
{
AddBlockFace(new IntVec3(x + 1, y + 1,z),
new IntVec3(x + 1, y + 1,z + 1),
new IntVec3(x + 1, y,z + 1),
new IntVec3(x + 1, y, z),
0.7f, chunk, index, block.m_Type, BlockFace.East, lightAmount);
index += 4;
}
// North
block = m_WorldData.GetBlock(blockX, blockY, blockZ + 1);
if (block.IsTransparent() == false)
{
AddBlockFace(new IntVec3(x + 1, y,z + 1),
new IntVec3(x + 1, y + 1,z + 1),
new IntVec3(x, y + 1,z + 1),
new IntVec3(x, y, z + 1),
0.4f, chunk, index, block.m_Type, BlockFace.North, lightAmount);
index += 4;
}
// South
block = m_WorldData.GetBlock(blockX, blockY, blockZ - 1);
if (block.IsTransparent() == false)
{
AddBlockFace(new IntVec3(x, y,z),
new IntVec3(x, y + 1,z),
new IntVec3(x + 1, y + 1,z),
new IntVec3(x + 1, y, z),
1.0f, chunk, index, block.m_Type, BlockFace.South, lightAmount);
index += 4;
}
return index;
}
float GetDensityForBlockCorner(int blockX, int blockY, int blockZ)
{
float density = 0;
density += m_WorldData.GetBlock(blockX, blockY, blockZ + 1).IsTransparent() ? 0.0f:1.0f;
density += m_WorldData.GetBlock(blockX - 1, blockY, blockZ + 1).IsTransparent() ? 0.0f:1.0f;
density += m_WorldData.GetBlock(blockX - 1, blockY, blockZ).IsTransparent() ? 0.0f:1.0f;
density += m_WorldData.GetBlock(blockX, blockY, blockZ).IsTransparent() ? 0.0f:1.0f;
density += m_WorldData.GetBlock(blockX, blockY + 1, blockZ + 1).IsTransparent() ? 0.0f:1.0f;
density += m_WorldData.GetBlock(blockX - 1, blockY + 1, blockZ + 1).IsTransparent() ? 0.0f:1.0f;
density += m_WorldData.GetBlock(blockX - 1, blockY + 1, blockZ).IsTransparent() ? 0.0f:1.0f;
density += m_WorldData.GetBlock(blockX, blockY + 1, blockZ).IsTransparent() ? 0.0f:1.0f;
return(density * (1.0f / 8.0f));
}