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 , move_velocity(0.003f)
  20 , pitch_sensitivity(-0.0025f)
  21 , yaw_sensitivity(-0.001f)
  22 , cam()
  23 , hud()
  24 , world()
  25 , outline()
  26 , outline_visible(false)
  27 , outline_transform(1.0f)
  28 , running(false)
  29 , front(false)
  30 , back(false)
  31 , left(false)
  32 , right(false)
  33 , up(false)
  34 , down(false)
  35 , place(false)
  36 , remove(false)
  37 , pick(false)
  38 , remove_id(0)
  39 , place_id(1) {
  40         GLContext::EnableVSync();
  41
  42         GLuint VertexArrayID;
  43         glGenVertexArrays(1, &VertexArrayID);
  44         glBindVertexArray(VertexArrayID);
  45
  46         world.Generate();
  47
  48         cam.Position(glm::vec3(0, 4, 4));
  49         hud.Viewport(960, 600);
  50         hud.Display(*world.BlockTypes()[place_id]);
  51
  52         glClearColor(0.0, 0.0, 0.0, 1.0);
  53 }
  54
  55
  56 void Application::Run() {
  57         running = true;
  58         Uint32 last = SDL_GetTicks();
  59         window.GrabMouse();
  60         while (running) {
  61                 Uint32 now = SDL_GetTicks();
  62                 int delta = now - last;
  63                 Loop(delta);
  64                 last = now;
  65         }
  66 }
  67
  68 void Application::Loop(int dt) {
  69         HandleEvents();
  70         Update(dt);
  71         Render();
  72 }
  73
  74
  75 void Application::HandleEvents() {
  76         SDL_Event event;
  77         while (SDL_PollEvent(&event)) {
  78                 switch (event.type) {
  79                         case SDL_KEYDOWN:
  80                         case SDL_KEYUP:
  81                                 switch (event.key.keysym.sym) {
  82                                         case SDLK_w:
  83                                                 front = event.key.state == SDL_PRESSED;
  84                                                 break;
  85                                         case SDLK_s:
  86                                                 back = event.key.state == SDL_PRESSED;
  87                                                 break;
  88                                         case SDLK_a:
  89                                                 left = event.key.state == SDL_PRESSED;
  90                                                 break;
  91                                         case SDLK_d:
  92                                                 right = event.key.state == SDL_PRESSED;
  93                                                 break;
  94                                         case SDLK_q:
  95                                         case SDLK_SPACE:
  96                                                 up = event.key.state == SDL_PRESSED;
  97                                                 break;
  98                                         case SDLK_e:
  99                                         case SDLK_LSHIFT:
 100                                                 down = event.key.state == SDL_PRESSED;
 101                                                 break;
 102                                 }
 103                                 break;
 104                         case SDL_MOUSEBUTTONDOWN:
 105                                 if (event.button.button == 1) {
 106                                         // left
 107                                         remove = true;
 108                                 } else if (event.button.button == 2) {
 109                                         // middle
 110                                         pick = true;
 111                                 } else if (event.button.button == 3) {
 112                                         // right
 113                                         place = true;
 114                                 }
 115                                 break;
 116                         case SDL_MOUSEMOTION:
 117                                 cam.RotateYaw(event.motion.xrel * yaw_sensitivity);
 118                                 cam.RotatePitch(event.motion.yrel * pitch_sensitivity);
 119                                 break;
 120                         case SDL_QUIT:
 121                                 running = false;
 122                                 break;
 123                         case SDL_WINDOWEVENT:
 124                                 switch (event.window.event) {
 125                                         case SDL_WINDOWEVENT_RESIZED:
 126                                                 cam.Viewport(event.window.data1, event.window.data2);
 127                                                 hud.Viewport(event.window.data1, event.window.data2);
 128                                                 break;
 129                                         default:
 130                                                 break;
 131                                 }
 132                                 break;
 133                         default:
 134                                 break;
 135                 }
 136         }
 137 }
 138
 139 void Application::Update(int dt) {
 140         glm::vec3 vel;
 141         if (right && !left) {
 142                 vel.x = move_velocity;
 143         } else if (left && !right) {
 144                 vel.x = -move_velocity;
 145         }
 146         if (up && !down) {
 147                 vel.y = move_velocity;
 148         } else if (down && !up) {
 149                 vel.y = -move_velocity;
 150         }
 151         if (back && !front) {
 152                 vel.z = move_velocity;
 153         } else if (front && !back) {
 154                 vel.z = -move_velocity;
 155         }
 156         cam.OrientationVelocity(vel);
 157
 158         cam.Update(dt);
 159
 160         Ray aim = cam.Aim();
 161         Chunk *chunk;
 162         int blkid;
 163         float dist;
 164         glm::vec3 normal;
 165         if (world.Intersection(aim, glm::mat4(1.0f), &chunk, &blkid, &dist, &normal)) {
 166                 glm::vec3 pos = Chunk::ToCoords(blkid);
 167                 outline_visible = true;
 168                 outline.Clear();
 169                 chunk->BlockAt(blkid).type->FillOutlineModel(outline);
 170                 outline_transform = glm::translate(chunk->Transform(), pos);
 171         } else {
 172                 outline_visible = false;
 173         }
 174
 175         if (pick) {
 176                 if (chunk) {
 177                         place_id = chunk->BlockAt(blkid).type->id;
 178                         hud.Display(*world.BlockTypes()[place_id]);
 179                 }
 180                 pick = false;
 181         }
 182         if (remove) {
 183                 if (chunk) {
 184                         chunk->BlockAt(blkid).type = world.BlockTypes()[remove_id];
 185                         chunk->Invalidate();
 186                 }
 187                 remove = false;
 188         }
 189         if (place) {
 190                 if (chunk) {
 191                         Chunk *mod_chunk = chunk;
 192                         glm::vec3 next_pos = Chunk::ToCoords(blkid) + normal;
 193                         if (!Chunk::InBounds(next_pos)) {
 194                                 mod_chunk = &world.Next(*chunk, normal);
 195                                 next_pos -= normal * Chunk::Extent();
 196                         }
 197                         mod_chunk->BlockAt(next_pos).type = world.BlockTypes()[place_id];
 198                         mod_chunk->Invalidate();
 199                 }
 200                 place = false;
 201         }
 202 }
 203
 204 void Application::Render() {
 205         GLContext::Clear();
 206
 207         program.Activate();
 208
 209         program.SetLightDirection({ -1.0f, -3.0f, -2.0f });
 210         program.SetVP(cam.View(), cam.Projection());
 211
 212         for (Chunk &chunk : world.LoadedChunks()) {
 213                 program.SetM(chunk.Transform());
 214                 chunk.Draw();
 215         }
 216
 217         if (outline_visible) {
 218                 program.SetM(outline_transform);
 219                 outline.Draw();
 220         }
 221
 222         hud.Render(program);
 223
 224         window.Flip();
 225 }
 226
 227 }