public void TestPatternCheckerZ()
{
var pattern = new CheckersPattern(Color.White, Color.Black);
Assert.AreEqual(pattern.PatternAt(Point.Zero), Color.White);
Assert.AreEqual(pattern.PatternAt(new Point(0, 0, 0.99)), Color.White);
Assert.AreEqual(pattern.PatternAt(new Point(0, 0, 1.01)), Color.Black);
}
public void CheckersShouldRepeatInZ()
{
var pat = new CheckersPattern(white, black);
Assert.Equal(white, pat.GetColor(Vector4.CreatePosition(0, 0, 0)));
Assert.Equal(white, pat.GetColor(Vector4.CreatePosition(0, 0, 0.99)));
Assert.Equal(black, pat.GetColor(Vector4.CreatePosition(0, 0, 1.01)));
}
public void CheckersShouldExtendInZ()
{
var pattern = new CheckersPattern(Color.WHITE, Color.BLACK);
Assert.AreEqual(Color.WHITE, pattern.PatternAt(new Point(0, 0, 0)));
Assert.AreEqual(Color.WHITE, pattern.PatternAt(new Point(0, 0, 0.99)));
Assert.AreEqual(Color.BLACK, pattern.PatternAt(new Point(0, 0, 1.01)));
}
public void Pattern_Repeats_In_Z()
{
var pattern = new CheckersPattern(Color.White, Color.Black);
var unitSphere = new Sphere();
pattern.ColorAt(new Point(0, 0, 0), unitSphere).ShouldBe(Color.White);
pattern.ColorAt(new Point(0, 0, 0.99), unitSphere).ShouldBe(Color.White);
pattern.ColorAt(new Point(0, 0, 1.01), unitSphere).ShouldBe(Color.Black);
}
public void TestPatternCheckerPattern2D()
{
var checkers = new CheckersPattern(2, 2, Color.Black, Color.White);
Assert.AreEqual(checkers.UVPatternAt(0.0, 0.0), Color.Black);
Assert.AreEqual(checkers.UVPatternAt(0.5, 0.0), Color.White);
Assert.AreEqual(checkers.UVPatternAt(0.0, 0.5), Color.White);
Assert.AreEqual(checkers.UVPatternAt(0.5, 0.5), Color.Black);
Assert.AreEqual(checkers.UVPatternAt(1.0, 1.0), Color.Black);
}
public void TestPatternTextureMapPatternWithSphericalMap()
{
var checkers = new CheckersPattern(16, 8, Color.Black, Color.White);
var pattern = new TextureMap(checkers, Mapping.Spherical);
Assert.AreEqual(pattern.PatternAt(new Point(0.4315, 0.4670, 0.7719)), Color.White);
Assert.AreEqual(pattern.PatternAt(new Point(-0.9654, 0.2552, -0.0534)), Color.Black);
Assert.AreEqual(pattern.PatternAt(new Point(0.1039, 0.7090, 0.6975)), Color.White);
Assert.AreEqual(pattern.PatternAt(new Point(-0.4986, -0.7856, -0.3663)), Color.Black);
Assert.AreEqual(pattern.PatternAt(new Point(-0.0317, -0.9395, 0.3411)), Color.Black);
Assert.AreEqual(pattern.PatternAt(new Point(0.4809, -0.7721, 0.4154)), Color.Black);
Assert.AreEqual(pattern.PatternAt(new Point(0.0285, -0.9612, -0.2745)), Color.Black);
Assert.AreEqual(pattern.PatternAt(new Point(-0.5734, -0.2162, -0.7903)), Color.White);
Assert.AreEqual(pattern.PatternAt(new Point(0.7688, -0.1470, 0.6223)), Color.Black);
Assert.AreEqual(pattern.PatternAt(new Point(-0.7652, 0.2175, 0.6060)), Color.Black);
}
public void T08_3DChecker()
{
Pattern pattern = new CheckersPattern(new SolidColorPattern(Color.white),
new SolidColorPattern(Color.black));
Assert.AreEqual(Color.white, pattern.PatternAt(new Point(0, 0, 0)));
Assert.AreEqual(Color.white, pattern.PatternAt(new Point(0.99, 0, 0)));
Assert.AreEqual(Color.black, pattern.PatternAt(new Point(1.01, 0, 0)));
Assert.AreEqual(Color.white, pattern.PatternAt(new Point(0, 0, 0)));
Assert.AreEqual(Color.white, pattern.PatternAt(new Point(0, 0.99, 0)));
Assert.AreEqual(Color.black, pattern.PatternAt(new Point(0, 1.01, 0)));
Assert.AreEqual(Color.white, pattern.PatternAt(new Point(0, 0, 0)));
Assert.AreEqual(Color.white, pattern.PatternAt(new Point(0, 0, 0.99)));
Assert.AreEqual(Color.black, pattern.PatternAt(new Point(0, 0, 1.01)));
}
private static void TestCase07()
{
// Checker should repeat in x
Pattern pattern = new CheckersPattern(white, black);
Assert.Equal(white, pattern.ColorAt(Tuple.Point(0, 0, 0)));
Assert.Equal(white, pattern.ColorAt(Tuple.Point(0.99f, 0, 0)));
Assert.Equal(black, pattern.ColorAt(Tuple.Point(1.01f, 0, 0)));
// Checker should repeat in y
Assert.Equal(white, pattern.ColorAt(Tuple.Point(0, 0, 0)));
Assert.Equal(white, pattern.ColorAt(Tuple.Point(0, 0.99f, 0)));
Assert.Equal(black, pattern.ColorAt(Tuple.Point(0, 1.01f, 0)));
// Checker should repeat in z
Assert.Equal(white, pattern.ColorAt(Tuple.Point(0, 0, 0)));
Assert.Equal(white, pattern.ColorAt(Tuple.Point(0, 0, 0.99f)));
Assert.Equal(black, pattern.ColorAt(Tuple.Point(0, 0, 1.01f)));
}
private RTPattern BuildPattern(Values item)
{
RTPattern p = null;
var type = item["type"];
var colors = item["colors"];
var transform = item["transform"];
var a = ConvertToColor(colors[0]);
var b = ConvertToColor(colors[1]);
switch (type.String.ToLower())
{
case "stripes":
p = new StripePattern(a, b);
break;
case "checkers":
p = new CheckersPattern(a, b);
break;
//BlendedPattern
//CheckersPattern
//GradientPattern
//NestedPattern
//PerlinNoisePattern
//RadialGradientPattern
//RingPattern
//SolidColorPattern
//CubeMapPattern3D
//CheckersPattern3D
//UVImage
//UVAlignCheck
//TextureMap
}
if (!transform.IsEmpty)
{
p.Transform = BuildTransform(transform);
}
return(p);
}
public static World Example3()
{
var world = new World();
var ringPattern1 = new RingPattern(
new Color(0.4, 0.4, 0.4),
new Color(0.7, 0.7, 0.7))
{
Transform =
Transform.Scale(4, 4, 4),
};
var stripePattern1 = new StripePattern(
new Color(0.2, 0.2, 0.2),
new Color(0.5, 0.5, 1.0))
{
Transform =
Transform.Scale(0.1, 0.1, 0.1),
};
var checkers = new CheckersPattern(
Color.White,
Color.Black)
{
Transform =
Transform.Scale(1, 1, 1),
};
var nestedPattern = new NestedPattern(
checkers,
ringPattern1,
stripePattern1);
var pertubedPattern = new PertubedPattern(
new SolidPattern(Color.Black),
new SolidPattern(new Color(0.1, 0.2, 0.3)))
{
Transform = Transform.Scale(5.5, 5.5, 5.5),
};
var floor = new Plane
{
Material = new Material
{
Pattern = pertubedPattern,
Specular = 0,
},
};
world.Objects.Add(floor);
var gradientTransform =
Transform.Translate(1, 0, 0) *
Transform.Scale(2, 1, 1);
var sphere = new Sphere
{
Transform =
Transform.Translate(0, 1, 0),
Material = new Material
{
Pattern = new GradientPattern(
new Color(1.0, 0.0, 0.0),
new Color(0.0, 0.0, 1.0))
{
Transform = gradientTransform,
},
},
};
world.Objects.Add(sphere);
var gradients = new[]
{
new GradientPattern(
new Color(1.0, 0.0, 0.0),
new Color(0.0, 0.0, 1.0))
{
Transform = gradientTransform,
},
new GradientPattern(
new Color(1.0, 0.0, 0.0),
new Color(0.0, 1.0, 0.0))
{
Transform = gradientTransform,
},
new GradientPattern(
new Color(0.0, 1.0, 0.0),
new Color(0.0, 0.0, 1.0))
{
Transform = gradientTransform,
},
new GradientPattern(
new Color(0.5, 0.5, 0.0),
new Color(0.0, 0.5, 0.5))
{
Transform = gradientTransform,
},
new GradientPattern(
new Color(0.5, 0.0, 0.5),
new Color(0.0, 1.0, 0.0))
{
Transform = gradientTransform,
},
};
const int n = 1024;
var arc = 2 * Math.PI / n;
for (var i = 0; i < n; i++)
{
const double r = 0.15;
var gi = i % gradients.Length;
var ni = (double)i / n;
const double scatter = 15;
var q = scatter * Rng.NextDouble();
var s = new Sphere
{
Transform =
Transform.RotateY(i * arc) *
Transform.Translate(0, r, 2 - r + q) *
Transform.Scale(r, r, r),
Material = new Material
{
Pattern = gradients[gi],
},
};
world.Objects.Add(s);
}
var light = new PointLight(
Vector4.CreatePosition(-10, 10, -10),
Color.White);
world.Lights.Add(light);
return(world);
}
