vex 从放弃到入门

int snpt = npoints(1);
int spt_num = fit(ch("cur_pos"),0,1,0,snpt-1);
vector cur_pos = point(1,"P",spt_num);
@P += cur_pos;

int npt_l = npoints(0);
int npt_r = npoints(1);
int npt_r1 = fit(ch("cur_pos"),0,1,0,npt_r-1);
vector cur_pos = point(1,"P",npt_r1);
for(int i =0; i<npt_l;i++)
{
    vector sphere_pos = point(0,"P",i);
    sphere_pos += cur_pos;
    setpointattrib(geoself(),"P",i,sphere_pos);
}

int nprm_t = nprimitives(1);
int add_points = ch("add_points");
for(int i = 0;i<nprm_t;i++)
{
    int spt_num1 = primpoint(1,i,0);
    int spt_num2 = primpoint(1,i,1);
    int spt_num3 = primpoint(1,i,3);
    
    vector tmp1 = point(1,"P",spt_num1);
    vector tmp2 = point(1,"P",spt_num2);
    vector tmp3 = point(1,"P",spt_num3);

    vector tmpU = tmp2 - tmp1;
    vector tmpV = tmp3 - tmp1;
    vector tmp = set(0,0,0);
    for(int j = 0; j< add_points ;j++)
    {
        float r1 = rand(j+1);
        float r2 = rand(j*10+3);
        tmp = tmpU*r1 + tmpV*r2;
        tmp += tmp1;
        int rtn = addpoint(geoself(),tmp);
    }

    
}