NX二次开发-UFUN已知两个向量方向求夹角角度UF_VEC3_angle_between

     NX9+VS2012

     #include <uf.h>
     #include <uf_ui.h>
     #include <uf_vec.h>
     #include <uf_curve.h>

     UF_initialize();

     //创建直线1
     UF_CURVE_line_t LineCoords1;
     LineCoords1.start_point[] = 0.0;
     LineCoords1.start_point[] = 0.0;
     LineCoords1.start_point[] = 0.0;
     LineCoords1.end_point[] = 0.0;
     LineCoords1.end_point[] = 100.0;
     LineCoords1.end_point[] = 0.0;
     tag_t Line1Tag = NULL_TAG;
     UF_CURVE_create_line(&LineCoords1, &Line1Tag);

     //创建直线2
     UF_CURVE_line_t LineCoords2;
     LineCoords2.start_point[] = 0.0;
     LineCoords2.start_point[] = 0.0;
     LineCoords2.start_point[] = 0.0;
     LineCoords2.end_point[] = 110.0;
     LineCoords2.end_point[] = 80.0;
     LineCoords2.end_point[] = 0.0;
     tag_t Line2Tag = NULL_TAG;
     UF_CURVE_create_line(&LineCoords2, &Line2Tag);

     //直线1的向量方向,终点减起点
     double Vec1[] = {LineCoords1.end_point[]-LineCoords1.start_point[], LineCoords1.end_point[]-LineCoords1.start_point[], LineCoords1.end_point[]-LineCoords1.start_point[]};

     //直线2的向量方向,终点减起点
     double Vec2[] = {LineCoords2.end_point[]-LineCoords2.start_point[], LineCoords2.end_point[]-LineCoords2.start_point[], LineCoords2.end_point[]-LineCoords2.start_point[]};

     //求两个向量的叉乘
     double CrossProduct[];
     UF_VEC3_cross(Vec1, Vec2, CrossProduct);

     //已知两个向量求夹角(输出的是弧度)
     double Angle;
     UF_VEC3_angle_between(Vec1, Vec2, CrossProduct, &Angle);

     //打印
     char msg[];
     sprintf(msg, "%f",RADEG*Angle );//角度=180度/π*弧度,或者用宏定义RADEG*弧度
     uc1601(msg, );

     UF_terminate();