public InputState(IntPtr windowPtr, SKMatrix viewTransform)
{
_invViewTransform = viewTransform.Invert();
Glfw.SetCursorPosCallback(windowPtr, OnCursorPosChanged);
Glfw.SetMouseButtonCallback(windowPtr, OnMouseButtonChanged);
Glfw.SetKeyCallback(windowPtr, OnKeyChanged);
}
public virtual void Render(SKCanvas canvas)
{
SKMatrix visual = VisualTransform;
SKMatrix invert = visual.Invert();
canvas.Concat(ref visual);
Draw(canvas);
canvas.Concat(ref invert);
}
public override void Render(SKCanvas canvas)
{
base.Render(canvas);
SKMatrix visual = _childrenVisualTransform;
SKMatrix invert = visual.Invert();
canvas.Concat(ref visual);
RenderChildren(canvas);
canvas.Concat(ref invert);
}
public void InverseOfMatrixIsCorrect()
{
var rowMajor = new float[] {
1, 2, 3,
0, 1, 4,
5, 6, 1,
};
var expectedRowMajor = new float[] {
-11.5f, 8, 2.5f,
10, -7, -2,
-2.5f, 2, 0.5f,
};
var matrix = new SKMatrix(rowMajor);
var inverse = matrix.Invert();
Assert.Equal(expectedRowMajor, inverse.Values);
}