public void World1_MarkerTransform_ForPoint()
{
var world1t = MatrixSupport.Translate(World1, TestPoint.X, TestPoint.Y);
TestContext.WriteLine($"world1t {world1t} testpoint ${TestPoint}");
var marker = MatrixSupport.LocalFor(world1t, MK_WIDTH, Bounds, -.5, -.5);
var model2 = MatrixSupport.Multiply(marker, world1t);
var mkproj = MatrixSupport.Multiply(model2, Projection);
var modelproj = MatrixSupport.Multiply(World1, Projection);
var reference = modelproj.Transform(TestPoint);
var target = mkproj.Transform(TestPointMarkerCenter);
TestContext.WriteLine($"marker {marker} model2 {model2} Mk.M.P {mkproj}");
TestContext.WriteLine($"M.P {modelproj} pt {TestPointMarkerCenter} ref {reference} target {target}");
Assert.AreEqual(reference.X, target.X, "target.X failed");
Assert.AreEqual(reference.Y, target.Y, "target.Y failed");
}
public void Matrix_Translate_Transform()
{
var wtrans = MatrixSupport.Translate(World1, TestPoint.X, TestPoint.Y);
TestContext.WriteLine($"modeltrans {wtrans}");
// with the translation, (0,0) is our test point (WC->NDC)
var point = wtrans.Transform(Origin);
AssertDouble(TestPoint_ndc.X, point.X, "X failed");
AssertDouble(TestPoint_ndc.Y, point.Y, "Y failed");
// cross-check through W1 inverse
var winv = MatrixSupport.Invert(World1);
// this goes back to world coordinates (NDC->WC)
var point2 = winv.Transform(point);
Assert.AreEqual(TestPoint.X, point2.X, "X failed.2");
Assert.AreEqual(TestPoint.Y, point2.Y, "Y failed.2");
}
public void Matrix_Translate_MatchesTransformGroup()
{
var gt = new TransformGroup();
gt.Children.Add(new TranslateTransform()
{
X = TestPoint.X, Y = TestPoint.Y
});
gt.Children.Add(new MatrixTransform()
{
Matrix = World1
});
TestContext.WriteLine($"final matrix {gt.Value}");
var modeltrans = MatrixSupport.Translate(World1, TestPoint.X, TestPoint.Y);
TestContext.WriteLine($"modeltrans {modeltrans}");
MatrixEqual(gt.Value, modeltrans);
}