// Reduces the size of the given shape by the given factor.
static VoxelSet <bool> ReduceShape(VoxelSet <bool> shape, int factor)
{
Vec3i size = Vec3i.Max(shape.Size / factor, new Vec3i(1));
Debug.Log("Old size: " + shape.Size + " New size: " + size);
VoxelSet <bool> reducedShape = new VoxelSet <bool>(size);
shape.Apply((v, idx) => {
Vec3i targetIdx = Vec3i.Min(size - 1, idx / factor);
reducedShape[targetIdx] = reducedShape[targetIdx] || v;
});
return(reducedShape);
}
public static List <Quad> VoxelsToQuads(VoxelSet <Vec4b> voxels)
{
List <Quad> quads = new List <Quad>();
Vec3f[] normals =
{
new Vec3f(1, 0, 0),
new Vec3f(-1, 0, 0),
new Vec3f(0, 1, 0),
new Vec3f(0, -1, 0),
new Vec3f(0, 0, 1),
new Vec3f(0, 0, -1)
};
Vec3f[] dxs =
{
new Vec3f(0, 1, 0),
new Vec3f(0, 0, 1),
new Vec3f(0, 0, 1),
new Vec3f(1, 0, 0),
new Vec3f(1, 0, 0),
new Vec3f(0, 1, 0)
};
Vec3f[] dys =
{
new Vec3f(0, 0, 1),
new Vec3f(0, 1, 0),
new Vec3f(1, 0, 0),
new Vec3f(0, 0, 1),
new Vec3f(0, 1, 0),
new Vec3f(1, 0, 0)
};
voxels.Apply((Vec4b c, Vec3i idx) => {
if (c.w == 0)
{
// Voxel is empty
//return;
}
// Check each face
for (int i = 0; i < 6; ++i)
{
Quad quad = new Quad();
quad.normal = normals[i];
quad.dx = dxs[i];
quad.dy = dys[i];
quad.offset = new Vec3f(idx.x, idx.y, idx.z);
quad.color = c;
Vec3i neighbor = idx + new Vec3i(new Vec3f(quad.normal.x, quad.normal.y, quad.normal.z));
if (c.w == 0 || voxels.IsValid(neighbor) && voxels[neighbor].w > 0)
{
// Voxel face is covered
continue;
}
if (quad.normal.x > 0 || quad.normal.y > 0 || quad.normal.z > 0)
{
quad.offset += quad.normal;
}
quads.Add(quad);
}
});
return(quads);
}