Three days, every afternoon, my right brain is suffering pain, I don't know why, may be too tired? I am not sure. I really hope the pain go away ASAP.
To learn to create a usable WF4 designer, I decide to have a good look at WPF. So, I pick up some WPF books, and I come across some math problems. I think I need to relearn the Vector and Linear Algebra math again. To have a good understand of WPF graphic system.
And I come across this great Vector Tutorial:
Vector Math for 3D Computer Graphics
Simple and Nice, hope you would like it.