public void ConstructingRayThroughCenterCanvas()
{
var c = new RTF.Camera(201, 101, Math.PI / 2);
var r = c.RayForPixel(100, 50);
Assert.Equal(RTF.PointType.Point(0, 0, 0), r.Origin);
CustomAssert.Equal(RTF.PointType.Vector(0, 0, -1), r.Direction, 5);
}
public void ConstructingRayThroughCornerCanvas()
{
var c = new RTF.Camera(201, 101, Math.PI / 2);
var r = c.RayForPixel(0, 0);
Assert.Equal(RTF.PointType.Point(0, 0, 0), r.Origin);
CustomAssert.Equal(
RTF.PointType.Vector(0.66519, 0.33259, -0.66851),
r.Direction,
5);
}
public void ConstructingRayWhenCameraTransformed()
{
var c = new RTF.Camera(201, 101, Math.PI / 2)
{
Transform = RTH.Transformations.RotationY(Math.PI / 4)
* RTH.Transformations.Translation(0, -2, 5)
};
var r = c.RayForPixel(100, 50);
Assert.Equal(RTF.PointType.Point(0, 2, -5), r.Origin);
CustomAssert.Equal(
RTF.PointType.Vector(Math.Sqrt(2) / 2, 0, -Math.Sqrt(2) / 2),
r.Direction,
5);
}
