Per-pixel lighting is implemented by using projective texture mapping technology and simulated the train headlights successfully.
采用投影纹理映射技术实现了像素级光照效果，并成功地用来模拟列车头灯。
Based on projective geometry and computer 3 dimension visual technology, the most effective method to solve sun shadow problem is present.
由此基于投影几何学理论及计算机三维可视化技术，建立了日照阴影问题最有效的方法。
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