source/3d/view.cpp.orig

   1 #include <msp/gl/blend.h>
   2 #include <msp/gl/tests.h>
   3 #include "layout.h"
   4 #include "track.h"
   5 #include "view.h"
   6
   7 using namespace std;
   8 using namespace Msp;
   9
  10 namespace R2C2 {
  11
  12 View3D::View3D(Layout3D &l, unsigned w, unsigned h):
  13         layout(l),
  14         width(w),
  15         height(h),
  16         pipeline(w, h),
  17         sky(layout.get_catalogue())
  18 {
  19         pipeline.set_camera(&camera);
  20         pipeline.add_renderable(sky);
  21         pipeline.add_renderable_for_pass(layout.get_scene(), 0);
  22         pipeline.add_renderable_for_pass(layout.get_scene(), "translucent");
  23
  24         GL::Pipeline::Pass *pass = &pipeline.add_pass("sky");
  25
  26         pass = &pipeline.add_pass(0);
  27         pass->set_lighting(&layout.get_lighting());
  28         pass->set_depth_test(&GL::DepthTest::lequal());
  29
  30         pass = &pipeline.add_pass("translucent");
  31         pass->set_lighting(&layout.get_lighting());
  32         pass->set_depth_test(&GL::DepthTest::lequal());
  33         pass->set_blend(&GL::Blend::alpha());
  34
  35         camera.set_up_direction(GL::Vector3(0, 0, 1));
  36         // Y+, 60° down
  37         camera.set_look_direction(GL::Vector3(0, 0.5, -0.866));
  38         camera.set_aspect(float(width)/height);
  39
  40         view_all();
  41 }
  42
  43 Ray View3D::create_ray(int x, int y) const
  44 {
  45         return create_ray(x*2.0f/width-1.0f, y*2.0f/height-1.0f);
  46 }
  47
  48 Ray View3D::create_ray(float x, float y) const
  49 {
  50         const GL::Vector3 &start = camera.get_position();
  51         GL::Vector4 ray = camera.unproject(GL::Vector4(x, y, 0, 0));
  52         return Ray(start, Vector(ray));
  53 }
  54
  55 void View3D::view_all(bool tight)
  56 {
  57         const set<Track *> &tracks = layout.get_layout().get_all<Track>();
  58         Geometry::BoundingBox<float, 3> bbox;
  59         for(set<Track *>::const_iterator i=tracks.begin(); i!=tracks.end(); ++i)
  60                 bbox = bbox|(*i)->get_bounding_box();
  61
  62         const Vector &minp = bbox.get_minimum_point();
  63         const Vector &maxp = bbox.get_maximum_point();
  64
  65         float t = tan(camera.get_field_of_view()/2.0f)*2.0f;
  66         float size = max((maxp.y-minp.y+0.1), (maxp.x-minp.x+0.1)/camera.get_aspect());
  67         float dist = size/t;
  68         if(!tight)
  69                 dist += sin(camera.get_field_of_view()/2.0f)*size;
  70         GL::Vector3 center = (minp+maxp)/2.0f;
  71         const GL::Vector3 &look = camera.get_look_direction();
  72         camera.set_position(center-look*dist);
  73         camera.set_depth_clip(dist*0.02, dist*50);
  74 }
  75
  76 void View3D::render()
  77 {
  78         pipeline.render();
  79 }
  80
  81 } // namespace R2C2