void set_all_normals (ENTITY* this,VECTOR* _normal)
{
 int num = ent_status (this,1);
 int c = 0;
 CONTACT* cont = 0;
 for (;c<num;c++)
{
 cont = ent_getvertex(this,NULL,c);
 cont.v.nx = _normal.x; 
 cont.v.ny = _normal.z;// DX coord to GS
 cont.v.nz = _normal.y;// DX coord to GS
}

}