source/3d/view.cpp

   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         shadow(4096, layout.get_scene(), layout.get_sun()),
  19         ambient_occlusion(w, h, 100)
  20 {
  21         pipeline.set_hdr(true);
  22         pipeline.set_camera(&camera);
  23         pipeline.add_renderable(sky);
  24         pipeline.add_renderable_for_pass(shadow, 0);
  25         pipeline.add_renderable_for_pass(layout.get_scene(), "translucent");
  26
  27         GL::Pipeline::Pass *pass = &pipeline.add_pass("sky");
  28
  29         pass = &pipeline.add_pass(0);
  30         pass->set_lighting(&layout.get_lighting());
  31         pass->set_depth_test(&GL::DepthTest::lequal());
  32
  33         pass = &pipeline.add_pass("translucent");
  34         pass->set_lighting(&layout.get_lighting());
  35         pass->set_depth_test(&GL::DepthTest::lequal());
  36         pass->set_blend(&GL::Blend::alpha());
  37
  38         pipeline.add_postprocessor(ambient_occlusion);
  39         colorcurve.set_srgb();
  40         pipeline.add_postprocessor(colorcurve);
  41
  42         update_shadow_area();
  43         layout.get_layout().signal_object_added.connect(sigc::hide(sigc::mem_fun(this, &View3D::update_shadow_area)));
  44
  45         camera.set_up_direction(GL::Vector3(0, 0, 1));
  46         // Y+, 60° down
  47         camera.set_look_direction(GL::Vector3(0, 0.5, -0.866));
  48         camera.set_aspect(float(width)/height);
  49
  50         view_all();
  51 }
  52
  53 Ray View3D::create_ray(int x, int y) const
  54 {
  55         return create_ray(x*2.0f/width-1.0f, y*2.0f/height-1.0f);
  56 }
  57
  58 Ray View3D::create_ray(float x, float y) const
  59 {
  60         const GL::Vector3 &start = camera.get_position();
  61         GL::Vector4 ray = camera.unproject(GL::Vector4(x, y, 0, 0));
  62         return Ray(start, Vector(ray));
  63 }
  64
  65 void View3D::compute_bounds(Vector &minp, Vector &maxp)
  66 {
  67         const set<Object *> &objects = layout.get_layout().get_all<Object>();
  68         Geometry::BoundingBox<float, 3> bbox;
  69         for(set<Object *>::const_iterator i=objects.begin(); i!=objects.end(); ++i)
  70                 bbox = bbox|(*i)->get_bounding_box();
  71
  72         minp = bbox.get_minimum_point();
  73         maxp = bbox.get_maximum_point();
  74 }
  75
  76 void View3D::view_all(bool tight)
  77 {
  78         Vector minp, maxp;
  79         compute_bounds(minp, maxp);
  80
  81         float t = tan(camera.get_field_of_view()/2.0f)*2.0f;
  82         float size = max((maxp.y-minp.y+0.1), (maxp.x-minp.x+0.1)/camera.get_aspect());
  83         float dist = size/t;
  84         if(!tight)
  85                 dist += sin(camera.get_field_of_view()/2.0f)*size;
  86         GL::Vector3 center = (minp+maxp)/2.0f;
  87         const GL::Vector3 &look = camera.get_look_direction();
  88         camera.set_position(center-look*dist);
  89         camera.set_depth_clip(dist*0.02, dist*50);
  90 }
  91
  92 void View3D::render()
  93 {
  94         pipeline.render();
  95 }
  96
  97 void View3D::update_shadow_area()
  98 {
  99         Vector minp, maxp;
 100         compute_bounds(minp, maxp);
 101         shadow.set_target((minp+maxp)/2.0f, (maxp-minp).norm()/2.0f);
 102 }
 103
 104 } // namespace R2C2