public override Vector3[] BuildNormals(
ref int count,
ref CullingFaces c, ref Voxel v,
int x, int y, int z)
{
var l = 4 * (6 - ((byte)c).PopCount());
count += l;
var vertices = new Vector3[l];
var index = 0;
for (byte f = 1; f <= (byte)CullingFaces.Down; f = (byte)(f << 1))
{
if (((byte)f).PopCount() != 1)
{
continue;
}
if (!c.HasFlag(f))
{
Array.Copy(
MakeFaceNormals((CullingFaces)f, x, y, z),
0,
vertices,
index,
4);
index += 4;
}
}
return(vertices);
}
private static IEnumerable <Vector3> MakeNormals(CullingFaces cullingFaces, int x, int y, int z)
{
var count = 4 * (6 - ((byte)cullingFaces).PopCount());
var vertices = new Vector3[count];
var index = 0;
foreach (var face in Enum.GetValues(typeof(CullingFaces)))
{
if (((byte)(CullingFaces)face).PopCount() != 1)
{
continue;
}
if (!cullingFaces.HasFlag((CullingFaces)face))
{
Array.Copy(
MakeFaceNormals((CullingFaces)face, x, y, z),
0,
vertices,
index,
4);
index += 4;
}
}
return(vertices);
}
public override Vector3[] BuildVertices(ref int count, ref CullingFaces c, ref Voxel v, int x, int y, int z)
{
var l = 4 * (6 - ((byte)c).PopCount());
count += l;
var vertices = new Vector3[l];
var index = 0;
var o = new Vector3(x, y, z);
// Faster itterate over culling faces against Enum.GetValues
for (byte fi = 1 << 0; fi <= (byte)CullingFaces.Down; fi = (byte)(fi << 1))
{
if (!c.HasFlag(fi))
{
Array.Copy(
MakeFaceVerts(fi, ref o),
0,
vertices,
index,
4);
index += 4;
}
}
return(vertices);
}
private static int[] MakeTriangles(CullingFaces face, ref int start)
{
var count = 6 * (6 - ((byte)face).PopCount());
var triangles = new int[count];
var index = 0;
foreach (var f in Enum.GetValues(typeof(CullingFaces)))
{
if (((byte)(CullingFaces)f).PopCount() != 1)
{
continue;
}
if (!face.HasFlag((CullingFaces)f))
{
Array.Copy(MakeFaceTriangles((CullingFaces)f, start), 0, triangles, index, 6);
index += 6;
start += 4;
}
}
return(triangles);
}
public override int[] BuildTrianlges(ref int count, ref CullingFaces c, ref Voxel v, ref int triangleIndex, int x, int y, int z)
{
var l = 6 * (6 - ((byte)c).PopCount());
count += l;
var triangles = new int[l];
var index = 0;
for (byte f = 1 << 0; f <= (byte)CullingFaces.Down; f = (byte)(f << 1))
{
if (((byte)f).PopCount() != 1)
{
continue;
}
if (!c.HasFlag(f))
{
Array.Copy(MakeFaceTriangles((CullingFaces)f, triangleIndex), 0, triangles, index, 6);
index += 6;
triangleIndex += 4;
}
}
return(triangles);
}