source/gameview/renderer.cpp

   1 #include "renderer.h"
   2 #include <msp/game/entity.h>
   3 #include <msp/game/meshsource.h>
   4 #include <msp/game/stage.h>
   5 #include <msp/game/transform.h>
   6 #include <msp/gl/sequencebuilder.h>
   7 #include "meshrenderer.h"
   8
   9 using namespace std;
  10
  11 namespace Msp::GameView {
  12
  13 Renderer::Renderer(Game::Stage &s, GL::View &v):
  14         System(s),
  15         view(v),
  16         event_observer(s.get_event_bus())
  17 {
  18         event_observer.observe<Game::Events::EntityCreated>([this](auto &e){ entity_created(e); });
  19         event_observer.observe<Game::Events::EntityDestroyed>([this](auto &e){ entity_destroyed(e); });
  20         event_observer.observe<Game::Events::CameraChanged>([this](auto &e){ camera_changed(e); });
  21
  22         stage.synthesize_initial_events(event_observer);
  23
  24         view.set_camera(&gl_camera);
  25 }
  26
  27 Renderer::~Renderer()
  28 { }
  29
  30 void Renderer::entity_created(const Game::Events::EntityCreated &event)
  31 {
  32         Game::Handle<Game::MeshSource> mesh_source = event.entity->get_component<Game::MeshSource>();
  33         Game::Handle<MeshRenderer> mesh_renderer = event.entity->get_component<MeshRenderer>();
  34         if(mesh_source && !mesh_renderer)
  35         {
  36                 auto i = lower_bound_member(entities, event.entity, &RenderedEntity::entity);
  37                 i = entities.emplace(i, event.entity, Game::Owned<MeshRenderer>(event.entity, mesh_source));
  38                 scene.add(i->mesh_renderer->get_instance());
  39         }
  40 }
  41
  42 void Renderer::entity_destroyed(const Game::Events::EntityDestroyed &event)
  43 {
  44         auto i = lower_bound_member(entities, event.entity, &RenderedEntity::entity);
  45         if(i!=entities.end() && i->entity==event.entity)
  46         {
  47                 scene.remove(i->mesh_renderer->get_instance());
  48                 entities.erase(i);
  49         }
  50 }
  51
  52 void Renderer::camera_changed(const Game::Events::CameraChanged &event)
  53 {
  54         active_camera = event.camera;
  55         if(event.camera)
  56         {
  57                 const string &seq_name = event.camera->get_sequence_name();
  58                 if(seq_name!=current_seq_name)
  59                 {
  60                         current_seq_name = seq_name;
  61                         GL::SequenceBuilder bld(stage.get_resources().get<GL::SequenceTemplate>(seq_name));
  62                         bld.set_renderable("content", scene);
  63                         sequence.reset(bld.build(view));
  64                         view.set_content(sequence.get());
  65                 }
  66         }
  67 }
  68
  69 void Renderer::tick(Time::TimeDelta)
  70 {
  71         if(active_camera)
  72         {
  73                 Game::Handle<Game::Transform> transform = active_camera->get_entity()->get_transform();
  74                 if(transform)
  75                         gl_camera.set_object_matrix(transform->get_world_matrix());
  76                 else
  77                         gl_camera.set_object_matrix(GL::Matrix());
  78                 if(active_camera->is_orthographic())
  79                 {
  80                         const LinAl::Vector<float, 2> &size = active_camera->get_size();
  81                         gl_camera.set_orthographic(size.x, size.y);
  82                 }
  83                 else
  84                         gl_camera.set_field_of_view(active_camera->get_fov_vertical());
  85                 gl_camera.set_depth_clip(active_camera->get_near_clip(), active_camera->get_far_clip());
  86         }
  87
  88         for(const RenderedEntity &e: entities)
  89                 e.mesh_renderer->update_matrix();
  90
  91         view.render();
  92 }
  93
  94 } // namespace Msp::GameView