计算两个向量的法向量

计算两个向量的法向量

function thirdAxisDirectVector(vector_1,vector_2){
    var v1_x = vector_1.x;
    var v1_y = vector_1.y;
    var v1_z = vector_1.z;

    var v2_x = vector_2.x;
    var v2_y = vector_2.y;
    var v2_z = vector_2.z;

    var v3_x = v1_y*v2_z - v2_y*v1_z;
    var v3_y = v2_x*v1_z - v1_x*v2_z;
    var v3_z = v1_x*v2_y - v2_x*v1_y;

    var vector_3 = new THREE.Vector3();
    vector_3.x = v3_x;
    vector_3.y = v3_y;
    vector_3.z = v3_z;
    
    return vector_3;
}

 

 

 

##################################