GPU PRO介绍的图形渲染引擎 D3D与OPENGL之前的移植-- quad-tree scene management - per-pixel lights (forward shading) - sunlight and spot light shadows (hardware shadow maps) - sky-box - full-scene bloom

This library offer easy way to add soft dynamic 2d lights to your physic based game. Rendering use libgdx but it would be easy to port this to other frameworks or pure openGl too.