source/gameview/renderer.cpp

   1 #include "renderer.h"
   2 #include <msp/game/entity.h>
   3 #include <msp/game/stage.h>
   4 #include <msp/game/transform.h>
   5 #include <msp/gl/sequencebuilder.h>
   6
   7 using namespace std;
   8
   9 namespace Msp::GameView {
  10
  11 Renderer::Renderer(Game::Stage &s, GL::View &v):
  12         System(s),
  13         view(v),
  14         event_observer(s.get_event_bus())
  15 {
  16         event_observer.observe<Game::Events::CameraChanged>([this](auto &e){ camera_changed(e); });
  17
  18         if(Game::Handle<Game::Camera> ac = stage.get_active_camera())
  19                 camera_changed({ ac });
  20
  21         view.set_camera(&gl_camera);
  22 }
  23
  24 Renderer::~Renderer()
  25 { }
  26
  27 void Renderer::camera_changed(const Game::Events::CameraChanged &event)
  28 {
  29         active_camera = event.camera;
  30         if(event.camera)
  31         {
  32                 const string &seq_name = event.camera->get_sequence_name();
  33                 if(seq_name!=current_seq_name)
  34                 {
  35                         current_seq_name = seq_name;
  36                         GL::SequenceBuilder bld(stage.get_resources().get<GL::SequenceTemplate>(seq_name));
  37                         bld.set_renderable("content", scene);
  38                         sequence.reset(bld.build(view));
  39                         view.set_content(sequence.get());
  40                 }
  41         }
  42 }
  43
  44 void Renderer::tick(Time::TimeDelta)
  45 {
  46         if(active_camera)
  47         {
  48                 Game::Handle<Game::Transform> transform = active_camera->get_entity()->get_transform();
  49                 if(transform)
  50                         gl_camera.set_object_matrix(transform->get_world_matrix());
  51                 else
  52                         gl_camera.set_object_matrix(GL::Matrix());
  53                 if(active_camera->is_orthographic())
  54                 {
  55                         const LinAl::Vector<float, 2> &size = active_camera->get_size();
  56                         gl_camera.set_orthographic(size.x, size.y);
  57                 }
  58                 else
  59                         gl_camera.set_field_of_view(active_camera->get_fov_vertical());
  60                 gl_camera.set_depth_clip(active_camera->get_near_clip(), active_camera->get_far_clip());
  61         }
  62         view.render();
  63 }
  64
  65 } // namespace Msp::GameView