source/libr2c2/object.cpp

   1 #include <stdexcept>
   2 #include "object.h"
   3
   4 using namespace std;
   5
   6 namespace R2C2 {
   7
   8 Snap Object::get_snap_node(unsigned) const
   9 {
  10         throw out_of_range("Object::get_snap_node");
  11 }
  12
  13 bool Object::snap(Snap &sn, float limit, SnapType what) const
  14 {
  15         if(what&SNAP_NODE)
  16         {
  17                 unsigned nsn = get_n_snap_nodes();
  18                 for(unsigned i=0; i<nsn; ++i)
  19                 {
  20                         Snap node = get_snap_node(i);
  21                         Vector d(sn.position.x-node.position.x, sn.position.y-node.position.y, sn.position.z-node.position.z);
  22                         if(d.x*d.x+d.y*d.y<limit*limit)
  23                         {
  24                                 sn = node;
  25                                 return true;
  26                         }
  27                 }
  28         }
  29
  30         return false;
  31 }
  32
  33 bool Object::snap_to(const Object &other, float limit, SnapType what)
  34 {
  35         if(what==SNAP_DEFAULT)
  36                 what = get_default_snap_type_to(other);
  37
  38         if(!what)
  39                 return false;
  40
  41         unsigned nsn = get_n_snap_nodes();
  42         for(unsigned i=0; i<nsn; ++i)
  43         {
  44                 Snap sn = get_snap_node(i);
  45                 Snap ssn = sn;
  46                 if(other.snap(ssn, limit, what))
  47                 {
  48                         set_rotation(rotation+ssn.rotation-sn.rotation-M_PI);
  49                         sn = get_snap_node(i);
  50                         position.x += ssn.position.x-sn.position.x;
  51                         position.y += ssn.position.y-sn.position.y;
  52                         position.z += ssn.position.z-sn.position.z;
  53                         return true;
  54                 }
  55         }
  56
  57         return false;
  58 }
  59
  60 } // namespace R2C2