source/3d/view.cpp

   1 #include <msp/gl/tests.h>
   2 #include "layout.h"
   3 #include "track.h"
   4 #include "view.h"
   5
   6 using namespace std;
   7 using namespace Msp;
   8
   9 namespace R2C2 {
  10
  11 View3D::View3D(Layout3D &l, unsigned w, unsigned h):
  12         layout(l),
  13         width(w),
  14         height(h),
  15         pipeline(w, h)
  16 {
  17         pipeline.set_camera(&camera);
  18         pipeline.add_renderable_for_pass(layout.get_scene(), 0);
  19
  20         GL::Pipeline::Pass *pass = &pipeline.add_pass(0);
  21         pass->set_lighting(&layout.get_lighting());
  22         pass->set_depth_test(&GL::DepthTest::lequal());
  23
  24         camera.set_up_direction(GL::Vector3(0, 0, 1));
  25         // Y+, 60° down
  26         camera.set_look_direction(GL::Vector3(0, 0.5, -0.866));
  27         camera.set_aspect(float(width)/height);
  28
  29         view_all();
  30 }
  31
  32 void View3D::view_all(bool tight)
  33 {
  34         const set<Track *> &tracks = layout.get_layout().get_all<Track>();
  35         Geometry::BoundingBox<float, 3> bbox;
  36         for(set<Track *>::const_iterator i=tracks.begin(); i!=tracks.end(); ++i)
  37                 bbox = bbox|(*i)->get_bounding_box();
  38
  39         const Vector &minp = bbox.get_minimum_point();
  40         const Vector &maxp = bbox.get_maximum_point();
  41
  42         float t = tan(camera.get_field_of_view()/2.0f)*2.0f;
  43         float size = max((maxp.y-minp.y+0.1), (maxp.x-minp.x+0.1)/camera.get_aspect());
  44         float dist = size/t;
  45         if(!tight)
  46                 dist += sin(camera.get_field_of_view()/2.0f)*size;
  47         GL::Vector3 center = (minp+maxp)/2.0f;
  48         const GL::Vector3 &look = camera.get_look_direction();
  49         camera.set_position(center-look*dist);
  50 }
  51
  52 void View3D::render()
  53 {
  54         pipeline.render();
  55 }
  56
  57 } // namespace R2C2