source/libr2c2/object.cpp

   1 #include <stdexcept>
   2 #include "object.h"
   3
   4 using namespace std;
   5
   6 namespace R2C2 {
   7
   8 Object::Object(Layout &l):
   9         layout(l),
  10         shape(0)
  11 { }
  12
  13 Snap Object::get_snap_node(unsigned) const
  14 {
  15         throw out_of_range("Object::get_snap_node");
  16 }
  17
  18 bool Object::snap(Snap &sn, float limit, SnapType what) const
  19 {
  20         if(what&SNAP_NODE)
  21         {
  22                 unsigned nsn = get_n_snap_nodes();
  23                 for(unsigned i=0; i<nsn; ++i)
  24                 {
  25                         Snap node = get_snap_node(i);
  26                         Vector span = sn.position-node.position;
  27                         if(dot(span, span)<limit*limit)
  28                         {
  29                                 sn = node;
  30                                 return true;
  31                         }
  32                 }
  33         }
  34
  35         return false;
  36 }
  37
  38 bool Object::snap_to(const Object &other, float limit, SnapType what)
  39 {
  40         if(what==SNAP_DEFAULT)
  41                 what = get_default_snap_type_to(other);
  42
  43         if(!what)
  44                 return false;
  45
  46         unsigned nsn = get_n_snap_nodes();
  47         for(unsigned i=0; i<nsn; ++i)
  48         {
  49                 Snap sn = get_snap_node(i);
  50                 Snap ssn = sn;
  51                 if(other.snap(ssn, limit, what))
  52                 {
  53                         if(what==SNAP_NODE)
  54                                 set_rotation(rotation+ssn.rotation-sn.rotation-Angle::half_turn());
  55                         else
  56                         {
  57                                 Angle adiff = wrap_balanced((ssn.rotation-sn.rotation)*2.0f)/2.0f;
  58                                 set_rotation(rotation+adiff);
  59                         }
  60                         sn = get_snap_node(i);
  61                         set_position(position+ssn.position-sn.position);
  62                         return true;
  63                 }
  64         }
  65
  66         return false;
  67 }
  68
  69 Object *Object::get_link(unsigned) const
  70 {
  71         throw out_of_range("Object::get_link");
  72 }
  73
  74 bool Object::break_link(Object &other)
  75 {
  76         unsigned nls = get_n_link_slots();
  77         for(unsigned i=0; i<nls; ++i)
  78                 if(get_link(i)==&other)
  79                         return break_link(i);
  80
  81         return false;
  82 }
  83
  84 void Object::break_links()
  85 {
  86         unsigned nls = get_n_link_slots();
  87         for(unsigned i=0; i<nls; ++i)
  88                 break_link(i);
  89 }
  90
  91 const Shape *Object::get_shape() const
  92 {
  93         if(shape)
  94                 return shape;
  95         return get_type().get_shape();
  96 }
  97
  98 bool Object::collide_ray(const Ray &ray) const
  99 {
 100         const Shape *s = get_shape();
 101         if(!s)
 102                 return false;
 103
 104         Transform reverse_trans = Transform::rotation(rotation, Vector(0, 0, -1))*
 105                 Transform::translation(-position);
 106         return s->check_intersection(reverse_trans.transform(ray));
 107 }
 108
 109 BoundingBox Object::get_bounding_box() const
 110 {
 111         const Shape *s = get_shape();
 112         if(!s)
 113                 return BoundingBox();
 114
 115         Transform trans = Transform::translation(position)*
 116                 Transform::rotation(rotation, Vector(0, 0, 1));
 117         return trans.transform(s->get_axis_aligned_bounding_box());
 118 }
 119
 120 } // namespace R2C2