public void DefaultMaterial()
{
var s = new TestShape();
var expected = new Material();
Assert.Equal(expected, s.Material);
}
public void AddChildToGroup()
{
var g = new Group();
var s = new TestShape();
g.Add(s);
Assert.NotEmpty(g);
Assert.Contains(s, g);
Assert.Equal(g, s.Parent);
}
public void AssignTransformation()
{
var s = new TestShape()
{
Transform = Transform.Translate(2, 3, 4),
};
var expected = Transform.Translate(2, 3, 4);
Assert.Equal(expected, s.Transform);
}
public void IntersectTranslatedShapeWithRay()
{
var r = new Ray(Vector4.CreatePosition(0, 0, -5), Vector4.CreateDirection(0, 0, 1));
var s = new TestShape();
s.Transform = Transform.Translate(5, 0, 0);
var xs = s.Intersect(r);
var savedRay = s.SavedRay.Value;
Assert.Equal(Vector4.CreatePosition(-5, 0, -5), savedRay.Origin);
Assert.Equal(Vector4.CreateDirection(0, 0, 1), savedRay.Direction);
}
public void TestShapeHasArbitraryBounds()
{
var s = new TestShape();
var box = s.GetBounds();
Assert.Equal(
Vector4.CreatePosition(-1, -1, -1),
box.Min);
Assert.Equal(
Vector4.CreatePosition(1, 1, 1),
box.Max);
}
public void IntersectGroupTestsChildrenIfBoxHit()
{
var child = new TestShape();
var shape = new Group();
shape.Add(child);
var r = new Ray(
Vector4.CreatePosition(0, 0, -5),
Vector4.CreateDirection(0, 0, 1));
var xs = shape.Intersect(r);
Assert.NotNull(child.SavedRay);
}
public void IntersectCsgTestsChildrenIfBoxHit()
{
var left = new TestShape();
var right = new TestShape();
var shape = new Csg(Operation.Difference, left, right);
var r = new Ray(
Vector4.CreatePosition(0, 0, -5),
Vector4.CreateDirection(0, 0, 1));
var xs = shape.Intersect(r);
Assert.NotNull(left.SavedRay);
Assert.NotNull(right.SavedRay);
}
public void ComputeNormalOnTranslatedShape()
{
var s = new TestShape()
{
Transform = Transform.Translate(0, 1, 0),
};
var n = s.GetNormal(Vector4.CreatePosition(0, 1.70711, -0.70711));
var expected = Vector4.CreateDirection(0, 0.70711, -0.70711);
const double eps = 0.00001;
var comparer = Vector4.GetEqualityComparer(eps);
Assert.Equal(expected, n, comparer);
}
public void AssigningMaterial()
{
var m = new Material
{
Ambient = 1,
};
var s = new TestShape()
{
Material = m,
};
Assert.Equal(m, s.Material);
}
public void ComputeNormalOnTransformedShape()
{
var s = new TestShape()
{
Transform =
Transform.Scale(1, 0.5, 1) *
Transform.RotateZ(Math.PI / 5),
};
var n = s.GetNormal(Vector4.CreatePosition(0, Math.Sqrt(2) / 2, -Math.Sqrt(2) / 2));
var expected = Vector4.CreateDirection(0, 0.97014, -0.24254);
const double eps = 0.00001;
var comparer = Vector4.GetEqualityComparer(eps);
Assert.Equal(expected, n, comparer);
}
public void DefaultTransformation()
{
var s = new TestShape();
Assert.Equal(Matrix4x4.Identity, s.Transform);
}
public void ShapeHasParentAttribute()
{
var s = new TestShape();
Assert.Null(s.Parent);
}