Simon's Tech Blog

Introduction About a month ago, I bought an iPhone 4s, so I write some code on my new toy. Although this device does not support multiple r...

Introduction Spherical Harmonics(SH) functions can represent low frequency data such as diffuse lighting, where those high frequency detai...

Introduction Game sometimes need to solve Inverse Kinematics (IK) for more realistic look like foot placement on a terrain. There are diffe...