public IEnumerable <Shape> Split(Shape parentShape, ComponentSelector selector)
{
if (selector == ComponentSelector.FACES)
{
var halfWidth = parentShape.Size.X * 0.5f;
var halfHeight = parentShape.Size.Y * 0.5f;
var halfDepth = parentShape.Size.Z * 0.5f;
var quads = new List <Quad>
{
// bottom
new Quad()
{
Transform = Matrix4x4.CreateTranslation(0, 0, halfHeight) * Matrix4x4.CreateRotationX((float)Math.PI * 0.5f) * parentShape.Transform,
Size = new Vector3(parentShape.Size.X, 1, parentShape.Size.Z)
},
// top
new Quad()
{
Transform = Matrix4x4.CreateTranslation(0, 0, halfHeight) * Matrix4x4.CreateRotationX((float)Math.PI * -0.5f) * parentShape.Transform,
Size = new Vector3(parentShape.Size.X, 1, parentShape.Size.Z)
},
// back
new Quad()
{
Transform = Matrix4x4.CreateTranslation(0, 0, halfDepth) * parentShape.Transform,
Size = new Vector3(parentShape.Size.X, 1, parentShape.Size.Z)
},
// front
new Quad()
{
Transform = Matrix4x4.CreateTranslation(0, 0, halfDepth) * Matrix4x4.CreateRotationY(-(float)Math.PI) * parentShape.Transform,
Size = new Vector3(parentShape.Size.X, 1, parentShape.Size.Z)
},
// right
new Quad()
{
Transform = Matrix4x4.CreateTranslation(0, 0, halfWidth) * Matrix4x4.CreateRotationY((float)Math.PI * 0.5f) * parentShape.Transform,
Size = new Vector3(parentShape.Size.Z, 1, parentShape.Size.X)
},
// left
new Quad()
{
Transform = Matrix4x4.CreateTranslation(0, 0, halfWidth) * Matrix4x4.CreateRotationY((float)Math.PI * -0.5f) * parentShape.Transform,
Size = new Vector3(parentShape.Size.Z, 1, parentShape.Size.X)
},
};
return(quads);
}
throw new NotImplementedException($"{nameof(BoxComponentSplitter)} doesn't know how to split '{selector.ToString()}' (yet?)");
}