src/app/states.cpp

   1 #include "MasterState.hpp"
   2
   3 #include "../world/Body.hpp"
   4 #include "../world/Simulation.hpp"
   5
   6 #include <glm/gtx/transform.hpp>
   7
   8
   9 namespace blobs {
  10 namespace app {
  11
  12 MasterState::MasterState(Assets &assets, world::Simulation &sim) noexcept
  13 : State()
  14 , assets(assets)
  15 , sim(sim)
  16 , reference(&sim.Root())
  17 , cam()
  18 , remain(0)
  19 , thirds(0)
  20 , paused(false) {
  21         // sunset view: standing in the center of surface 0 (+Z), looking west (-X)
  22         //cam.View(glm::lookAt(glm::vec3(0.0f, 0.0f, 5.6f), glm::vec3(-1.0f, 0.0f, 5.6f), glm::vec3(0.0f, 0.0f, 1.0f)));
  23         // sunrise view: standing in the center of surface 0 (+Z), looking east (+X)
  24         cam.View(glm::lookAt(glm::vec3(0.0f, 0.0f, 5.6f), glm::vec3(1.0f, 0.0f, 5.6f), glm::vec3(0.0f, 0.0f, 1.0f)));
  25         // far out, looking at planet
  26         //cam.View(glm::lookAt(glm::vec3(10.0f, 10.0f, 50.0f), glm::vec3(0.0f, 0.0f, 0.0f), glm::vec3(0.0f, 1.0f, 0.0f)));
  27 }
  28
  29 MasterState::~MasterState() noexcept {
  30 }
  31
  32
  33 void MasterState::OnResize(int w, int h) {
  34         cam.Aspect(float(w), float(h));
  35 }
  36
  37 void MasterState::OnUpdate(int dt) {
  38         remain += dt;
  39         while (remain >= FrameMS()) {
  40                 Tick();
  41         }
  42 }
  43
  44 void MasterState::Tick() {
  45         if (!paused) {
  46                 sim.Tick();
  47         }
  48         remain -= FrameMS();
  49         thirds = (thirds + 1) % 3;
  50 }
  51
  52 int MasterState::FrameMS() const noexcept {
  53         return thirds == 0 ? 16 : 17;
  54 }
  55
  56
  57 void MasterState::OnKeyDown(const SDL_KeyboardEvent &e) {
  58         if (e.keysym.sym == SDLK_p) {
  59                 paused = !paused;
  60         }
  61 }
  62
  63 void MasterState::OnRender(graphics::Viewport &viewport) {
  64         glm::dmat4 ppos = reference->InverseTransform() * reference->ToParent();
  65         assets.shaders.planet_surface.Activate();
  66         assets.shaders.planet_surface.SetTexture(assets.textures.tiles);
  67
  68         assets.shaders.planet_surface.SetMVP(glm::mat4(1.0f), cam.View(), cam.Projection());
  69         assets.shaders.planet_surface.SetLight(glm::vec3(cam.View() * ppos[3]), glm::vec3(1.0f, 1.0f, 1.0f), 2.0e4f);
  70         reference->Draw(assets, viewport);
  71
  72         world::Body *child = reference->Children()[0];
  73         assets.shaders.planet_surface.SetMVP(reference->InverseTransform() * child->FromParent() * child->LocalTransform(), cam.View(), cam.Projection());
  74         child->Draw(assets, viewport);
  75
  76         assets.shaders.sun_surface.Activate();
  77         assets.shaders.sun_surface.SetMVP(ppos * reference->Parent().LocalTransform(), cam.View(), cam.Projection());
  78         assets.shaders.sun_surface.SetLight(glm::vec3(1.0f, 1.0f, 1.0f), 2.0e4f);
  79         assets.shaders.sun_surface.Draw();
  80 }
  81
  82 }
  83 }