static void Render()
{
view.Render();
batch.Begin();
batch.SetMatrix(Matrix3x2.Scale(Screen.PixelSize, Screen.PixelSize));
batch.DrawTextureFlipped(view.Texture, Vector2.Zero, Color4.White);
batch.End();
}
public static void AbstractScalingMatricesCanInverse()
{
var x = Var("𝓍");
var y = Var("𝓎");
var m = Matrix3x2.Scale(x, y);
var im = m.Invert();
// NB: Expressions such as x / y cannot simplify when y is a variable.
// Because of this, we can't verify M*M⁻¹ and M⁻¹*M…
Assert.NotEqual(Matrix3x2.Identity, m);
Assert.NotEqual(Matrix3x2.Identity, im);
}
private void SetDisplayTransform(Matrix3x2 displayTransform)
{
Matrix3x2 pointTransform = _transform * displayTransform;
Vector2 scale = pointTransform.Scale();
double length = scale.LengthSquared();
// PointTransform will throw if we provide a very small scale.
if (length < 10E-7)
{
scale = Vector2.One / scale;
pointTransform *= Matrix3x2.CreateScale(scale);
}
Stroke.PointTransform = pointTransform;
}
public static void ConcreteScalingMatricesCanInverse(int sx, int sy)
{
var m = Matrix3x2.Scale(sx, sy);
var im = m.Invert();
Assert.NotEqual(Matrix3x2.Identity, m);
Assert.NotEqual(Matrix3x2.Identity, im);
var a = m * im;
var b = im * m;
Assert.Equal(a, b);
Assert.Equal(Matrix3x2.Identity, a);
Assert.Equal(Matrix3x2.Identity, b);
}
