我在碰撞检测代码中使用的代码是这样的:
(注:Vector3f
是 LWJGL 库的一部分。)
(注2:Tri是由LWJGL的Vector3fs.v1、v2、v3三个组成的类。)
public Vector<Tri> getTrisTouching(Vector3f pos, float radius){
Vector<Tri> tempVec = new Vector<Tri>();
for(int i = 0; i < tris.size(); i++){
Tri t = tris.get(i);
Vector3f one_to_point = new Vector3f(0,0,0);
Vector3f.sub(pos,t.v1,one_to_point); //Storing vector A->P
Vector3f one_to_two = new Vector3f(0,0,0);
Vector3f.sub(t.v2,t.v1, one_to_two); //Storing vector A->B
Vector3f one_to_three = new Vector3f(0,0,0);
Vector3f.sub(t.v3, t.v1, one_to_three); //Storing vector A->C
float q1 = Vector3f.dot(one_to_point, one_to_two) / one_to_two.lengthSquared(); // The normalized "distance" from a to
float q2 = Vector3f.dot(one_to_point, one_to_three) / one_to_three.lengthSquared(); // The normalized "distance" from a to
if (q1 > 0 && q2 > 0 && q1 + q2 < 1){
tempVec.add(t);
}
}
return tempVec;
}
我的问题是如何正确查看空间中的一个点是否接触到我的三角形之一?