Open Access
表1
基于光线投射的可见面判别算法流程
| 输入：人脸网格模型Fj |
| 输出：剔除不可见面后的人脸网格模型Fj′ |
| for 遍历顶点1→VerNum; |
| 获取顶点的坐标Ot，以图像平面法向量方向做线； |
| for遍历网格面片1→FaceNum |
| 根据当前坐标按(3)式求解对应顶点 |
| while t≥0, b1≥0, b2≥0; |
| 若b1+b2≤1 |
| 则判定射线与当前三角面片相交； |
| end while |
| 更新Ot |
| end for |
| 更新VerNum; |
| end for |
| 返回Fj并剔除不可见面片 |
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