List<TexturedVertex> GenerateVertsFor(VoxelContainer data, IntVector3 start, IntVector3 end)
{
var verts = new List<TexturedVertex>();
var here = new IntVector3(data.Start);
//Voxel currentVoxel;
Vector3[] currentVerts;
Vector2[] currentUVs;
for (here.X = start.X; here.X <= end.X; here.X++)
for (here.Z = start.Z; here.Z <= end.Z; here.Z++)
for (here.Y = start.Y; here.Y <= end.Y; here.Y++)
{
//currentVoxel = data.GetVoxel(here);
foreach (var face in VoxelHelper.VisibleFacesFor(data, here))
{
currentVerts = VoxelHelper.FaceVerts(here, face).ToArray();
currentUVs = VoxelHelper.UVCoords(data.GetVoxel(here).Type, face, Atlas).ToArray();
verts.AddRange(new []{
new TexturedVertex(currentVerts[0], currentUVs[0]),
new TexturedVertex(currentVerts[1], currentUVs[1]),
new TexturedVertex(currentVerts[2], currentUVs[2]),
new TexturedVertex(currentVerts[3], currentUVs[3])
});
}
}
return verts;
}
/// <summary>
/// Returns faces that are visible for the voxel at the given index in the given volume.
/// </summary>
/// <returns>The faces for.</returns>
/// <param name="volume">Volume.</param>
/// <param name="voxel">Voxel.</param>
public static IEnumerable<Face> VisibleFacesFor(VoxelContainer chunk, IntVector3 voxel)
{
var result = new List<Face>();
var faceVector = new IntVector3(voxel);
if (chunk.GetVoxel(voxel).Weight > 0)
{
faceVector.Y += 1;
if (chunk.GetVoxel(faceVector).Weight <= 0)
result.Add(Face.Top);
faceVector.Y -= 2;
if (chunk.GetVoxel(faceVector).Weight <= 0)
result.Add(Face.Bottom);
faceVector.Y += 1;
faceVector.X -= 1;
if (chunk.GetVoxel(faceVector).Weight <= 0)
result.Add(Face.Left);
faceVector.X += 2;
if (chunk.GetVoxel(faceVector).Weight <= 0)
result.Add(Face.Right);
faceVector.X -= 1;
faceVector.Z -= 1;
if (chunk.GetVoxel(faceVector).Weight <= 0)
result.Add(Face.Front);
faceVector.Z += 2;
if (chunk.GetVoxel(faceVector).Weight <= 0)
result.Add(Face.Back);
}
return result;
}