src/app.cpp

   1 #include "app.hpp"
   2
   3 #include "geometry.hpp"
   4
   5 #include <iostream>
   6 #include <stdexcept>
   7
   8
   9 namespace blank {
  10
  11 Application::Application()
  12 : init_sdl()
  13 , init_img()
  14 , init_gl()
  15 , window()
  16 , ctx(window.CreateContext())
  17 , init_glew()
  18 , program()
  19 , cam()
  20 , hud()
  21 , world()
  22 , outline()
  23 , outline_visible(false)
  24 , outline_transform(1.0f)
  25 , running(false)
  26 , place(false)
  27 , remove(false)
  28 , pick(false)
  29 , remove_id(0)
  30 , place_id(1) {
  31         GLContext::EnableVSync();
  32
  33         GLuint VertexArrayID;
  34         glGenVertexArrays(1, &VertexArrayID);
  35         glBindVertexArray(VertexArrayID);
  36
  37         world.Generate({ -4, -4, -4 }, { 5, 5, 5});
  38
  39         hud.Viewport(960, 600);
  40         hud.Display(*world.BlockTypes()[place_id]);
  41
  42         glClearColor(0.0, 0.0, 0.0, 1.0);
  43 }
  44
  45
  46 void Application::Run() {
  47         running = true;
  48         Uint32 last = SDL_GetTicks();
  49         window.GrabMouse();
  50         while (running) {
  51                 Uint32 now = SDL_GetTicks();
  52                 int delta = now - last;
  53                 Loop(delta);
  54                 last = now;
  55         }
  56 }
  57
  58 void Application::Loop(int dt) {
  59         HandleEvents();
  60         Update(dt);
  61         Render();
  62 }
  63
  64
  65 void Application::HandleEvents() {
  66         SDL_Event event;
  67         while (SDL_PollEvent(&event)) {
  68                 switch (event.type) {
  69                         case SDL_KEYDOWN:
  70                         case SDL_KEYUP:
  71                                 world.Controller().HandleKeyboard(event.key);
  72                                 break;
  73                         case SDL_MOUSEBUTTONDOWN:
  74                                 if (event.button.button == 1) {
  75                                         // left
  76                                         remove = true;
  77                                 } else if (event.button.button == 2) {
  78                                         // middle
  79                                         pick = true;
  80                                 } else if (event.button.button == 3) {
  81                                         // right
  82                                         place = true;
  83                                 }
  84                                 break;
  85                         case SDL_MOUSEMOTION:
  86                                 world.Controller().HandleMouse(event.motion);
  87                                 break;
  88                         case SDL_QUIT:
  89                                 running = false;
  90                                 break;
  91                         case SDL_WINDOWEVENT:
  92                                 switch (event.window.event) {
  93                                         case SDL_WINDOWEVENT_RESIZED:
  94                                                 cam.Viewport(event.window.data1, event.window.data2);
  95                                                 hud.Viewport(event.window.data1, event.window.data2);
  96                                                 break;
  97                                         default:
  98                                                 break;
  99                                 }
 100                                 break;
 101                         default:
 102                                 break;
 103                 }
 104         }
 105 }
 106
 107 void Application::Update(int dt) {
 108         world.Update(dt);
 109
 110         Ray aim = world.Controller().Aim();
 111         Chunk *chunk;
 112         int blkid;
 113         float dist;
 114         glm::vec3 normal;
 115         if (world.Intersection(aim, glm::mat4(1.0f), &chunk, &blkid, &dist, &normal)) {
 116                 glm::vec3 pos = Chunk::ToCoords(blkid);
 117                 outline_visible = true;
 118                 outline.Clear();
 119                 chunk->BlockAt(blkid).type->FillOutlineModel(outline);
 120                 outline_transform = glm::translate(chunk->Transform(), pos);
 121                 outline_transform = glm::scale(outline_transform, glm::vec3(1.0001f));
 122         } else {
 123                 outline_visible = false;
 124         }
 125
 126         if (pick) {
 127                 if (chunk) {
 128                         place_id = chunk->BlockAt(blkid).type->id;
 129                         hud.Display(*world.BlockTypes()[place_id]);
 130                 }
 131                 pick = false;
 132         }
 133         if (remove) {
 134                 if (chunk) {
 135                         chunk->BlockAt(blkid).type = world.BlockTypes()[remove_id];
 136                         chunk->Invalidate();
 137                 }
 138                 remove = false;
 139         }
 140         if (place) {
 141                 if (chunk) {
 142                         Chunk *mod_chunk = chunk;
 143                         glm::vec3 next_pos = Chunk::ToCoords(blkid) + normal;
 144                         if (!Chunk::InBounds(next_pos)) {
 145                                 mod_chunk = &world.Next(*chunk, normal);
 146                                 next_pos -= normal * Chunk::Extent();
 147                         }
 148                         mod_chunk->BlockAt(next_pos).type = world.BlockTypes()[place_id];
 149                         mod_chunk->Invalidate();
 150                 }
 151                 place = false;
 152         }
 153 }
 154
 155 void Application::Render() {
 156         GLContext::Clear();
 157
 158         program.Activate();
 159
 160         program.SetProjection(cam.Projection());
 161         world.Render(program);
 162
 163         if (outline_visible) {
 164                 program.SetM(outline_transform);
 165                 outline.Draw();
 166         }
 167
 168         hud.Render(program);
 169
 170         window.Flip();
 171 }
 172
 173 }