public void RotationMatrix()
{
using (var obj = new SKTransformNode()) {
var zero = new MatrixFloat3x3();
obj.RotationMatrix = zero;
// In Swift, a rotated zero matrice also becomes the identity matrice.
Asserts.AreEqual(MatrixFloat3x3.Identity, obj.RotationMatrix, "RotationMatrix");
// Changing XRotation (or YRotation for that matter), makes the RotationMatrix change too
obj.XRotation = (nfloat)(Math.PI / 2);
var rotatedMatrix = new MatrixFloat3x3(
1, 0, 0,
0, 0, -1,
0, 1, 0
);
Asserts.AreEqual(rotatedMatrix, obj.RotationMatrix, 0.000001f, "RotationMatrix a");
Asserts.AreEqual(rotatedMatrix, CFunctions.GetMatrixFloat3x3(obj, "rotationMatrix"), 0.000001f, "RotationMatrix native a");
// Got this matrix after setting both XRotation and YRotation to Pi/2
rotatedMatrix = new MatrixFloat3x3(
0, 1, 0,
0, 0, -1,
-1, 0, 0
);
obj.RotationMatrix = rotatedMatrix;
Asserts.AreEqual(rotatedMatrix, obj.RotationMatrix, 0.000001f, "RotationMatrix b");
Assert.AreEqual((nfloat)(Math.PI / 2), obj.XRotation, 0.000001f, "XRotation b");
Assert.AreEqual(0, obj.YRotation, 0.000001f, "YRotation b"); // Setting YRotation changes RotationMatrix, but setting RotationMatrix doesn't change YRotation.
}
}
public void QuaternionTest()
{
Quaternion Q;
using (var obj = new SKTransformNode()) {
Asserts.AreEqual(Quaternion.Identity, obj.Quaternion, "1 Quaternion");
Q = new Quaternion(new Vector3(1, 2, 3), 4);
obj.Quaternion = Q;
Asserts.AreEqual(Q, obj.Quaternion, "2 Quaternion");
}
}
public void EulerAngles()
{
VectorFloat3 V3 = new VectorFloat3();
using (var obj = new SKTransformNode()) {
Asserts.AreEqual(V3, obj.EulerAngles, "1 EulerAngles");
V3 = new VectorFloat3(1, 2, 3);
obj.EulerAngles = V3;
// The values bellow match what the same code in Swift returns.
Assert.AreEqual(-2.14159298f, obj.EulerAngles.X, "#x1");
Assert.AreEqual(1.14159274f, obj.EulerAngles.Y, "#y1");
Assert.AreEqual(-0.141592711f, obj.EulerAngles.Z, "#z1");
}
}
