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 {
  20         pipeline.set_hdr(true);
  21         pipeline.set_camera(&camera);
  22         pipeline.add_renderable(sky);
  23         pipeline.add_renderable_for_pass(shadow, 0);
  24         pipeline.add_renderable_for_pass(layout.get_scene(), "translucent");
  25
  26         GL::Pipeline::Pass *pass = &pipeline.add_pass("sky");
  27         pass->set_lighting(&layout.get_lighting());
  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         try
  39         {
  40                 ambient_occlusion = new GL::AmbientOcclusion(w, h, 100);
  41                 pipeline.add_postprocessor(*ambient_occlusion);
  42         }
  43         catch(...)
  44         {
  45                 delete ambient_occlusion;
  46                 ambient_occlusion = 0;
  47         }
  48
  49         try
  50         {
  51                 colorcurve = new GL::ColorCurve;
  52                 colorcurve->set_srgb();
  53                 pipeline.add_postprocessor(*colorcurve);
  54         }
  55         catch(...)
  56         {
  57                 delete colorcurve;
  58                 colorcurve = 0;
  59         }
  60
  61         update_shadow_area();
  62         layout.get_layout().signal_object_added.connect(sigc::hide(sigc::mem_fun(this, &View3D::update_shadow_area)));
  63
  64         camera.set_up_direction(GL::Vector3(0, 0, 1));
  65         // Y+, 60° down
  66         camera.set_look_direction(GL::Vector3(0, 0.5, -0.866));
  67         camera.set_aspect(float(width)/height);
  68
  69         view_all();
  70 }
  71
  72 View3D::~View3D()
  73 {
  74         delete colorcurve;
  75         delete ambient_occlusion;
  76 }
  77
  78 Ray View3D::create_ray(int x, int y) const
  79 {
  80         return create_ray(x*2.0f/width-1.0f, y*2.0f/height-1.0f);
  81 }
  82
  83 Ray View3D::create_ray(float x, float y) const
  84 {
  85         const GL::Vector3 &start = camera.get_position();
  86         GL::Vector4 ray = camera.unproject(GL::Vector4(x, y, 0, 0));
  87         return Ray(start, ray.slice<3>(0));
  88 }
  89
  90 void View3D::compute_bounds(Vector &minp, Vector &maxp)
  91 {
  92         const set<Object *> &objects = layout.get_layout().get_all<Object>();
  93         Geometry::BoundingBox<float, 3> bbox;
  94         for(set<Object *>::const_iterator i=objects.begin(); i!=objects.end(); ++i)
  95                 bbox = bbox|(*i)->get_bounding_box();
  96
  97         minp = bbox.get_minimum_point();
  98         maxp = bbox.get_maximum_point();
  99 }
 100
 101 void View3D::view_all(bool tight)
 102 {
 103         Vector minp, maxp;
 104         compute_bounds(minp, maxp);
 105
 106         float t = tan(camera.get_field_of_view()/2.0f)*2.0f;
 107         float size = max((maxp.y-minp.y+0.1), (maxp.x-minp.x+0.1)/camera.get_aspect());
 108         float dist = size/t;
 109         if(!tight)
 110                 dist += sin(camera.get_field_of_view()/2.0f)*size;
 111         GL::Vector3 center = (minp+maxp)/2.0f;
 112         const GL::Vector3 &look = camera.get_look_direction();
 113         camera.set_position(center-look*dist);
 114         camera.set_depth_clip(dist*0.02, dist*50);
 115 }
 116
 117 void View3D::render()
 118 {
 119         pipeline.render();
 120 }
 121
 122 void View3D::update_shadow_area()
 123 {
 124         Vector minp, maxp;
 125         compute_bounds(minp, maxp);
 126         shadow.set_target((minp+maxp)/2.0f, max((maxp-minp).norm()/2.0f, 0.1f));
 127 }
 128
 129 } // namespace R2C2