地形开挖+arcgis

最新推荐文章于 2024-07-21 12:06:30 发布

原创最新推荐文章于 2024-07-21 12:06:30 发布 · 441 阅读

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#arcgis

地形开挖效果

扩展slice的glsl代码,实现开挖效果
在这里插入图片描述
核心代码：

bool caculateSide(vec3 VecPoint1, vec3 VecPoint2, vec3 Rel){
    float L1=length(VecPoint1);
    float L2= length(VecPoint2);
    float LR= length(Rel);
    float m1=L1/LR;
    float m2=L2/LR;
   
    vec3 v1 = cross(VecPoint1,VecPoint2);
    vec3 v2 = cross(VecPoint1,Rel);
    float dot_1=dot(v1,v2);
  
    vec3 v3 = cross(VecPoint2,VecPoint1);
    vec3 v4 = cross(VecPoint2,Rel);
    float dot_2=dot(v3,v4);
  
    vec3 v5 = cross(VecPoint1-VecPoint2,-VecPoint2);
    vec3 v6 = cross(VecPoint1-VecPoint2,Rel-VecPoint2);
    float dot_3=dot(v5,v6);
  
    bool line1=(m1*Rel.x==VecPoint1.x)&&dot(VecPoint1,Rel)>0.0;
    bool line2=(m2*Rel.x==VecPoint2.x)&&dot(VecPoint2,Rel)>0.0;
  
    return (dot_1>0.0&&dot_2>0.0&&dot_3>0.0)||line1||line2;
}