source/designer/measure.cpp

   1 #include <cmath>
   2 #include <msp/gl/meshbuilder.h>
   3 #include <msp/gl/renderer.h>
   4 #include "designer.h"
   5 #include "3d/layout.h"
   6 #include "measure.h"
   7
   8 using namespace std;
   9 using namespace R2C2;
  10 using namespace Msp;
  11
  12 Measure::Measure(Designer &d):
  13         designer(d),
  14         state(NONE),
  15         mesh((GL::COLOR4_UBYTE, GL::VERTEX3))
  16 { }
  17
  18 void Measure::start()
  19 {
  20         state = STARTING;
  21         update_mesh();
  22 }
  23
  24 void Measure::button_press(float gx, float gy, unsigned btn)
  25 {
  26         if(!state)
  27                 return;
  28
  29         if(btn==1)
  30         {
  31                 spoint = Vector(gx, gy, 0);
  32                 sdir = 0;
  33                 snap_to_tracks(spoint, sdir);
  34
  35                 state = ACTIVE;
  36         }
  37         else if(btn==3)
  38         {
  39                 if(state==ACTIVE)
  40                 {
  41                         state = STARTING;
  42                         update_mesh();
  43                 }
  44                 else
  45                 {
  46                         state = NONE;
  47                         signal_done.emit();
  48                 }
  49         }
  50 }
  51
  52 void Measure::pointer_motion(float gx, float gy)
  53 {
  54         if(!state)
  55                 return;
  56
  57         pointer = Vector(gx, gy, 0);
  58         float dir = sdir;
  59         snap_to_tracks(pointer, dir);
  60
  61         if(state!=STARTING)
  62         {
  63                 Vector delta(pointer.x-spoint.x, pointer.y-spoint.y, 0);
  64                 float c = cos(sdir);
  65                 float s = sin(sdir);
  66
  67                 par_dist = delta.x*c+delta.y*s;
  68                 perp_dist = delta.x*s-delta.y*c;
  69
  70                 adiff = dir-sdir+M_PI;
  71                 while(adiff<-M_PI)
  72                         adiff += M_PI*2;
  73                 while(adiff>M_PI)
  74                         adiff -= M_PI*2;
  75
  76                 update_mesh();
  77
  78                 signal_changed.emit();
  79         }
  80 }
  81
  82 void Measure::render(GL::Renderer &renderer, const GL::Tag &) const
  83 {
  84         if(state==NONE)
  85                 return;
  86
  87         GL::Renderer::Push push(renderer);
  88         const Vector &pos = (state==ACTIVE ? spoint : pointer);
  89         renderer.matrix_stack() *= GL::Matrix::translation(pos.x, pos.y, pos.z);
  90
  91         mesh.draw(renderer);
  92 }
  93
  94 void Measure::update_mesh()
  95 {
  96         mesh.clear();
  97         GL::MeshBuilder bld(mesh);
  98         bld.color(1.0f, 1.0f, 1.0f, 1.0f);
  99         bld.begin(GL::QUAD_STRIP);
 100         for(unsigned i=0; i<=16; ++i)
 101         {
 102                 float x = cos(i*M_PI/8)*0.005;
 103                 float y = sin(i*M_PI/8)*0.005;
 104                 bld.vertex(x, y, 0);
 105                 bld.vertex(x, y, 0.01);
 106         }
 107         bld.end();
 108
 109         if(state==ACTIVE)
 110         {
 111                 float c = cos(sdir);
 112                 float s = sin(sdir);
 113                 bld.begin(GL::QUAD_STRIP);
 114                 bld.vertex(0, 0, 0);
 115                 bld.vertex(0, 0, 0.01);
 116                 bld.vertex(c*par_dist, s*par_dist, 0);
 117                 bld.vertex(c*par_dist, s*par_dist, 0.01);
 118                 bld.vertex(pointer.x-spoint.x, pointer.y-spoint.y, 0);
 119                 bld.vertex(pointer.x-spoint.x, pointer.y-spoint.y, 0.01);
 120                 bld.vertex(0, 0, 0);
 121                 bld.vertex(0, 0, 0.01);
 122                 bld.end();
 123         }
 124 }
 125
 126 void Measure::snap_to_tracks(Vector &pt, float &dir)
 127 {
 128         const set<Track *> &ltracks = designer.get_layout().get_tracks();
 129         for(set<Track *>::const_iterator i=ltracks.begin(); i!=ltracks.end(); ++i)
 130                 if((*i)->snap(pt, dir))
 131                         return;
 132 }