void buildChunkMesh(Chunks chunk, Vec3Int chunkCoords, Mesh _mesh)
{
int[] indices = new int[ChunkTemplate.Instance.vertex_count * 3];
IndexStack <int> istack = new IndexStack <int>(indices);
for (int x = 0; x < vxe.chunk_size; x++)
{
for (int y = 0; y < vxe.chunk_size; y++)
{
for (int z = 0; z < vxe.chunk_size; z++)
{
Vec3Int vcoord = new Vec3Int(x, y, z);
Voxel voxel = chunk.getVoxel(vcoord);
if (voxel.isOccupied())
{
Vector3 vwrldcoord = vxe.FromGrid(chunkCoords * vxe.chunk_size + vcoord);
if ((vwrldcoord - camera.transform.position).sqrMagnitude > 0.64f)
{
continue;
}
//front
if (voxel.getFace(VF.VX_FRONT_SHOWN))
{
//front
istack.push(chunk.getIndex(x, y, z + 1, DIR.DIR_FRONT));
istack.push(chunk.getIndex(x + 1, y, z + 1, DIR.DIR_FRONT));
istack.push(chunk.getIndex(x + 1, y + 1, z + 1, DIR.DIR_FRONT));
istack.push(chunk.getIndex(x, y + 1, z + 1, DIR.DIR_FRONT));
}
if (voxel.getFace(VF.VX_RIGHT_SHOWN))
{
//right
istack.push(chunk.getIndex(x + 1, y, z, DIR.DIR_RIGHT));
istack.push(chunk.getIndex(x + 1, y + 1, z, DIR.DIR_RIGHT));
istack.push(chunk.getIndex(x + 1, y + 1, z + 1, DIR.DIR_RIGHT));
istack.push(chunk.getIndex(x + 1, y, z + 1, DIR.DIR_RIGHT));
}
if (voxel.getFace(VF.VX_BACK_SHOWN))
{
//back
istack.push(chunk.getIndex(x, y, z, DIR.DIR_BACK));
istack.push(chunk.getIndex(x, y + 1, z, DIR.DIR_BACK));
istack.push(chunk.getIndex(x + 1, y + 1, z, DIR.DIR_BACK));
istack.push(chunk.getIndex(x + 1, y, z, DIR.DIR_BACK));
}
if (voxel.getFace(VF.VX_LEFT_SHOWN))
{
//left
istack.push(chunk.getIndex(x, y, z, DIR.DIR_LEFT));
istack.push(chunk.getIndex(x, y, z + 1, DIR.DIR_LEFT));
istack.push(chunk.getIndex(x, y + 1, z + 1, DIR.DIR_LEFT));
istack.push(chunk.getIndex(x, y + 1, z, DIR.DIR_LEFT));
}
if (voxel.getFace(VF.VX_TOP_SHOWN))
{
//top
istack.push(chunk.getIndex(x, y + 1, z, DIR.DIR_UP));
istack.push(chunk.getIndex(x, y + 1, z + 1, DIR.DIR_UP));
istack.push(chunk.getIndex(x + 1, y + 1, z + 1, DIR.DIR_UP));
istack.push(chunk.getIndex(x + 1, y + 1, z, DIR.DIR_UP));
}
if (voxel.getFace(VF.VX_BOTTOM_SHOWN))
{
//bottom
istack.push(chunk.getIndex(x, y, z, DIR.DIR_DOWN));
istack.push(chunk.getIndex(x + 1, y, z, DIR.DIR_DOWN));
istack.push(chunk.getIndex(x + 1, y, z + 1, DIR.DIR_DOWN));
istack.push(chunk.getIndex(x, y, z + 1, DIR.DIR_DOWN));
}
}
}
}
}
int[] indexArray = new int[istack.getCount()];
System.Array.Copy(istack.getArray(), indexArray, istack.getCount());
_mesh.SetIndices(indexArray, MeshTopology.Quads, 0);
}