Example #1
0
		static public Frustum Transform(Frustum frustum, Matrix4X4 matrix)
		{
			Frustum transformedFrustum = new Frustum();
			transformedFrustum.plane = new Plane[frustum.plane.Length];
			for (int i = 0; i < frustum.plane.Length; ++i)
			{
				Vector3 planeNormal = frustum.plane[i].planeNormal;
				double distanceToPlane = frustum.plane[i].distanceToPlaneFromOrigin;
				transformedFrustum.plane[i].planeNormal = Vector3.TransformNormal(planeNormal, matrix);
				Vector3 pointOnPlane = planeNormal * distanceToPlane;
				Vector3 pointOnTransformedPlane = Vector3.TransformNormal(pointOnPlane, matrix);
				transformedFrustum.plane[i].distanceToPlaneFromOrigin = Vector3.Dot(transformedFrustum.plane[i].planeNormal, pointOnTransformedPlane);
			}

			return transformedFrustum;
		}
Example #2
0
		public void FrustumIntersetAABBTests()
		{
			{
				Frustum frustum = new Frustum(
					new Plane(new Vector3(1, 0, 0), 20),
					new Plane(new Vector3(-1, 0, 0), 20),
					new Plane(new Vector3(0, 1, 0), 20),
					new Plane(new Vector3(0, -1, 0), 20),
					new Plane(new Vector3(0, 0, 1), 20),
					new Plane(new Vector3(0, 0, -1), 20));

				// outside to left
				{
					AxisAlignedBoundingBox aabb = new AxisAlignedBoundingBox(new Vector3(-30, -10, -10), new Vector3(-25, 10, 10));
					FrustumIntersection intersection = frustum.GetIntersect(aabb);
					Assert.IsTrue(intersection == FrustumIntersection.Outside);
				}

				// intersect
				{
					AxisAlignedBoundingBox aabb = new AxisAlignedBoundingBox(new Vector3(-25, 0, -10), new Vector3(-15, 10, 10));
					FrustumIntersection intersection = frustum.GetIntersect(aabb);
					Assert.IsTrue(intersection == FrustumIntersection.Intersect);
				}

				// inside
				{
					AxisAlignedBoundingBox aabb = new AxisAlignedBoundingBox(new Vector3(-5, -5, -5), new Vector3(5, 5, 5));
					FrustumIntersection intersection = frustum.GetIntersect(aabb);
					Assert.IsTrue(intersection == FrustumIntersection.Inside);
				}
			}

			{
				Frustum frustum = new Frustum(
					new Plane(new Vector3(-1, -1, 0), 0),
					new Plane(new Vector3(1, -1, 0), 0),
					new Plane(new Vector3(0, -1, -1), 0),
					new Plane(new Vector3(0, -1, 1), 0),
					new Plane(new Vector3(0, -1, 0), 0),
					new Plane(new Vector3(0, 1, 0), 10000));

				// outside to left
				{
					AxisAlignedBoundingBox aabb = new AxisAlignedBoundingBox(new Vector3(-110, 0, -10), new Vector3(-100, 10, 10));
					FrustumIntersection intersection = frustum.GetIntersect(aabb);
					Assert.IsTrue(intersection == FrustumIntersection.Outside);
				}

				// intersect with origin (front)
				{
					AxisAlignedBoundingBox aabb = new AxisAlignedBoundingBox(new Vector3(-10, -10, -10), new Vector3(10, 10, 10));
					FrustumIntersection intersection = frustum.GetIntersect(aabb);
					Assert.IsTrue(intersection == FrustumIntersection.Intersect);
				}

				// inside
				{
					AxisAlignedBoundingBox aabb = new AxisAlignedBoundingBox(new Vector3(-5, 100, -5), new Vector3(5, 110, 5));
					FrustumIntersection intersection = frustum.GetIntersect(aabb);
					Assert.IsTrue(intersection == FrustumIntersection.Inside);
				}
			}

			{
				// looking down -z
				Frustum frustum5PlaneNegZ = new Frustum(
					new Vector3(-1, 0, 1),
					new Vector3(-1, 0, 1),
					new Vector3(0, 1, 1),
					new Vector3(0, -1, 1),
					new Vector3(0, 0, -1), 10000);

				// outside to left
				{
					AxisAlignedBoundingBox aabb = new AxisAlignedBoundingBox(new Vector3(-110, 0, -10), new Vector3(-100, 10, 10));
					FrustumIntersection intersection = frustum5PlaneNegZ.GetIntersect(aabb);
					Assert.IsTrue(intersection == FrustumIntersection.Outside);
				}

				// intersect with origin (front)
				{
					AxisAlignedBoundingBox aabb = new AxisAlignedBoundingBox(new Vector3(-10, -10, -10), new Vector3(10, 10, 10));
					FrustumIntersection intersection = frustum5PlaneNegZ.GetIntersect(aabb);
					Assert.IsTrue(intersection == FrustumIntersection.Intersect);
				}

				// inside
				{
					AxisAlignedBoundingBox aabb = new AxisAlignedBoundingBox(new Vector3(-5, -5, -110), new Vector3(5, 5, -100));
					FrustumIntersection intersection = frustum5PlaneNegZ.GetIntersect(aabb);
					Assert.IsTrue(intersection == FrustumIntersection.Inside);
				}
			}
		}
        public void FrustumIntersetAABBTests()
        {
            {
                Frustum frustum = new Frustum(
                    new Plane(new Vector3(1, 0, 0), 20),
                    new Plane(new Vector3(-1, 0, 0), 20),
                    new Plane(new Vector3(0, 1, 0), 20),
                    new Plane(new Vector3(0, -1, 0), 20),
                    new Plane(new Vector3(0, 0, 1), 20),
                    new Plane(new Vector3(0, 0, -1), 20));

                // outside to left
                {
                    AxisAlignedBoundingBox aabb         = new AxisAlignedBoundingBox(new Vector3(-30, -10, -10), new Vector3(-25, 10, 10));
                    FrustumIntersection    intersection = frustum.GetIntersect(aabb);
                    Assert.IsTrue(intersection == FrustumIntersection.Outside);
                }

                // intersect
                {
                    AxisAlignedBoundingBox aabb         = new AxisAlignedBoundingBox(new Vector3(-25, 0, -10), new Vector3(-15, 10, 10));
                    FrustumIntersection    intersection = frustum.GetIntersect(aabb);
                    Assert.IsTrue(intersection == FrustumIntersection.Intersect);
                }

                // not intersect
                {
                    AxisAlignedBoundingBox aabb         = new AxisAlignedBoundingBox(new Vector3(-25, 0, 30), new Vector3(-15, 10, 35));
                    FrustumIntersection    intersection = frustum.GetIntersect(aabb);
                    Assert.IsTrue(intersection == FrustumIntersection.Outside);
                }

                // inside
                {
                    AxisAlignedBoundingBox aabb         = new AxisAlignedBoundingBox(new Vector3(-5, -5, -5), new Vector3(5, 5, 5));
                    FrustumIntersection    intersection = frustum.GetIntersect(aabb);
                    Assert.IsTrue(intersection == FrustumIntersection.Inside);
                }
            }

            {
                Frustum frustum = new Frustum(
                    new Plane(new Vector3(-1, -1, 0), 0),
                    new Plane(new Vector3(1, -1, 0), 0),
                    new Plane(new Vector3(0, -1, -1), 0),
                    new Plane(new Vector3(0, -1, 1), 0),
                    new Plane(new Vector3(0, -1, 0), 0),
                    new Plane(new Vector3(0, 1, 0), 10000));

                // outside to left
                {
                    AxisAlignedBoundingBox aabb         = new AxisAlignedBoundingBox(new Vector3(-110, 0, -10), new Vector3(-100, 10, 10));
                    FrustumIntersection    intersection = frustum.GetIntersect(aabb);
                    Assert.IsTrue(intersection == FrustumIntersection.Outside);
                }

                // intersect with origin (front)
                {
                    AxisAlignedBoundingBox aabb         = new AxisAlignedBoundingBox(new Vector3(-10, -10, -10), new Vector3(10, 10, 10));
                    FrustumIntersection    intersection = frustum.GetIntersect(aabb);
                    Assert.IsTrue(intersection == FrustumIntersection.Intersect);
                }

                // inside
                {
                    AxisAlignedBoundingBox aabb         = new AxisAlignedBoundingBox(new Vector3(-5, 100, -5), new Vector3(5, 110, 5));
                    FrustumIntersection    intersection = frustum.GetIntersect(aabb);
                    Assert.IsTrue(intersection == FrustumIntersection.Inside);
                }
            }

            {
                // looking down -z
                Frustum frustum5PlaneNegZ = new Frustum(
                    new Vector3(-1, 0, 1),
                    new Vector3(-1, 0, 1),
                    new Vector3(0, 1, 1),
                    new Vector3(0, -1, 1),
                    new Vector3(0, 0, -1), 10000);

                // outside to left
                {
                    AxisAlignedBoundingBox aabb         = new AxisAlignedBoundingBox(new Vector3(-110, 0, -10), new Vector3(-100, 10, 10));
                    FrustumIntersection    intersection = frustum5PlaneNegZ.GetIntersect(aabb);
                    Assert.IsTrue(intersection == FrustumIntersection.Outside);
                }

                // intersect with origin (front)
                {
                    AxisAlignedBoundingBox aabb         = new AxisAlignedBoundingBox(new Vector3(-10, -10, -10), new Vector3(10, 10, 10));
                    FrustumIntersection    intersection = frustum5PlaneNegZ.GetIntersect(aabb);
                    Assert.IsTrue(intersection == FrustumIntersection.Intersect);
                }

                // inside
                {
                    AxisAlignedBoundingBox aabb         = new AxisAlignedBoundingBox(new Vector3(-5, -5, -110), new Vector3(5, 5, -100));
                    FrustumIntersection    intersection = frustum5PlaneNegZ.GetIntersect(aabb);
                    Assert.IsTrue(intersection == FrustumIntersection.Inside);
                }
            }
        }