public void T04_StripeTransformation()
{
if (Scene.current != null)
{
Scene.current.Clear();
}
Sphere sphere = new Sphere();
sphere.SetMatrix(Mat4.ScaleMatrix(2, 2, 2));
StripePattern pattern = new StripePattern(new SolidColorPattern(Color.white),
new SolidColorPattern(Color.black));
Color color = pattern.PatternAtObject(sphere, new Point(1.5, 0, 0));
Assert.AreEqual(Color.white, color);
sphere.SetMatrix(new Mat4());
pattern.matrix = Mat4.ScaleMatrix(2, 2, 2);
color = pattern.PatternAtObject(sphere, new Point(1.5, 0, 0));
Assert.AreEqual(Color.white, color);
sphere.SetMatrix(Mat4.ScaleMatrix(2, 2, 2));
pattern.matrix = Mat4.TranslateMatrix(0.5, 0, 0);
color = pattern.PatternAtObject(sphere, new Point(2.5, 0, 0));
Assert.AreEqual(Color.white, color);
}
public void AStripePatternIsConstantInY()
{
var shape = new Sphere();
var pattern = new StripePattern(Color.WHITE, Color.BLACK);
Assert.AreEqual(Color.WHITE, pattern.PatternAtObject(shape, new Point(0, 0, 0)));
Assert.AreEqual(Color.WHITE, pattern.PatternAtObject(shape, new Point(0, 1, 0)));
Assert.AreEqual(Color.WHITE, pattern.PatternAtObject(shape, new Point(0, 2, 0)));
}
public void StripesWithAPatternTransformation()
{
var shape = new Sphere();
var pattern = new StripePattern(Color.WHITE, Color.BLACK)
{
Transform = Transform.Scaling(2, 2, 2)
};
var c = pattern.PatternAtObject(shape, new Point(1.5, 0, 0));
Assert.AreEqual(Color.WHITE, c);
}
public void AStripePatternIsAlternatesInX()
{
var shape = new Sphere();
var pattern = new StripePattern(Color.WHITE, Color.BLACK);
Assert.AreEqual(Color.WHITE, pattern.PatternAtObject(shape, new Point(0, 0, 0)));
Assert.AreEqual(Color.WHITE, pattern.PatternAtObject(shape, new Point(0.9, 0, 0)));
Assert.AreEqual(Color.BLACK, pattern.PatternAtObject(shape, new Point(1, 0, 0)));
Assert.AreEqual(Color.BLACK, pattern.PatternAtObject(shape, new Point(-0.1, 0, 0)));
Assert.AreEqual(Color.BLACK, pattern.PatternAtObject(shape, new Point(-1, 0, 0)));
Assert.AreEqual(Color.WHITE, pattern.PatternAtObject(shape, new Point(-1.1, 0, 0)));
}