public void RayMissesCSGObject()
{
var c = new shape.CSG(shape.Operation.Union, new shape.Sphere(), new shape.Cube());
var r = new Ray(pt.Point(0, 2, -5), pt.Vector(0, 0, 1));
var xs = c.Intersect(r);
Assert.Empty(xs);
}
public void CSGCreatedWithOperationAndTwoShapes()
{
var s1 = new shape.Sphere();
var s2 = new shape.Cube();
var c = new shape.CSG(shape.Operation.Union, s1, s2);
Assert.Equal(shape.Operation.Union, c.Operation);
Assert.Equal(s1, c.Left);
Assert.Equal(s2, c.Right);
Assert.Equal(c, s1.Parent);
Assert.Equal(c, s2.Parent);
}
public void RayHitsCSGObject()
{
var s1 = new shape.Sphere();
var s2 = new shape.Sphere(transform.Translation(0, 0, 0.5));
var c = new shape.CSG(shape.Operation.Union, s1, s2);
var r = new Ray(pt.Point(0, 0, -5), pt.Vector(0, 0, 1));
var xs = c.Intersect(r);
Assert.Equal(2, xs.Count());
Assert.Equal(4, xs[0].T);
Assert.Equal(s1, xs[0].Object);
Assert.Equal(6.5, xs[1].T);
Assert.Equal(s2, xs[1].Object);
}
public void FilteringListIntersections(string op, int x0, int x1)
{
var operation = (shape.Operation)Enum.Parse(typeof(shape.Operation), op);
var s1 = new shape.Sphere();
var s2 = new shape.Cube();
var c = new shape.CSG(operation, s1, s2);
var xs = Intersection.Intersections(
new Intersection(1, s1),
new Intersection(2, s2),
new Intersection(3, s1),
new Intersection(4, s2)
);
List <Intersection> result = c.FilterIntersections(xs);
Assert.Equal(2, result.Count);
Assert.Equal(xs[x0], result[0]);
Assert.Equal(xs[x1], result[1]);
}