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反射 (计算机图形学)

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光线跟踪模型展示镜面反射

反射计算机图形学中指模拟具有反光性质的物体(例如镜子或有光泽的表面

反射是由光线追迹描绘器完成的,过程大致为从眼睛投射光线到反射面上并进行跟踪,计算出其反射方向,然后重复上述步骤直到找不到具有反射性质的表面。对木材瓷砖等具有光泽的表面进行反射可以使3D渲染的效果更加逼真。

反射分为以下四种:

  • 镜面反射(英语:Polished or Mirror reflection):镜面反射指不受干扰的反射,比如镜子或镀铬表面。
  • 模糊反射(英语:Blurry Reflection):模糊反射指材料表面有微小的随机凹凸,使得反射是模糊的。
  • 金属反射(英语:Metallic Reflection):如果反射材料的高光和阴影都保持其固有颜色,即为金属反射。
  • 光泽反射(英语:Glossy Reflection):这个术语的意思可能并不明确。有时它指“模糊反射”的对立面(“光泽度”较低时,反射是模糊的)。然而,有些人将“光泽反射”一词作为“模糊反射”的同义词使用。

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反射 (计算机图形学)
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