git.mutantstargoat.com Git - demo/blob - src/main.cc

   1 #include <GL/glew.h>
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <vector>
   7
   8 #include <gmath/gmath.h>
   9
  10 #include "gfxapi.h"
  11 #include "global.h"
  12
  13 /* TODO: fix those */
  14 #include "camera.h"
  15 #include "mesh.h"
  16 #include "morph_renderer.h"
  17 #include "object.h"
  18 #include "scene.h"
  19 #include "terrain.h"
  20 #include "texture.h"
  21
  22 #include "opengl/opengl.h"
  23 #include "vulkan/vk.h"
  24
  25 /* static functions */
  26
  27 static bool init(Gfx_API api);
  28 static void cleanup();
  29 static void display();
  30
  31 /* glfw callbacks */
  32
  33 static void clbk_key(GLFWwindow *win, int key, int scancode, int action, int mods);
  34 static void clbk_motion(GLFWwindow *win, double x, double y);
  35 static void clbk_mouse(GLFWwindow *win, int button, int action, int mods);
  36 static void clbk_reshape(GLFWwindow *win, int width, int height);
  37
  38 /* global variables */
  39
  40 Mat4 mprojection;
  41
  42 GLFWwindow *win;
  43 int win_w = 800;
  44 int win_h = 600;
  45
  46 ShaderManager *sdr_man;
  47
  48 double time_sec;
  49
  50 /* variables */
  51 static bool move_camera;
  52
  53 static float cam_phi = 25;
  54 static float cam_theta = 0;
  55 static float cam_dist = 16;
  56 static Vec3 cam_pos;
  57
  58 static float aspect;
  59 static OrbitCamera *camera;
  60
  61 static float fog_density;
  62
  63 static Scene *cow_scene;
  64 static Object *cow_object;
  65 static MorphRenderer *cow_rend;
  66
  67 static Terrain terrain;
  68 static Texture *skybox_tex;
  69 static Texture *terrain_tex;
  70 static Material terrain_mat;
  71 static Renderer *terrain_rend;
  72
  73 /* *** */
  74
  75 int main(int argc, char **argv)
  76 {
  77         Gfx_API api;
  78
  79         for(int i=0; i<argc; ++i) {
  80                 if(strcmp(argv[i], "-opengl") == 0) {
  81                         api = GFX_GL;
  82                         printf("Backend: OpenGL.\n");
  83                 }
  84                 else if(strcmp(argv[i], "-vulkan") == 0) {
  85                         api = GFX_VK;
  86                         printf("Backend: Vulkan.\n");
  87                 }
  88                 else {
  89                         api = GFX_GL;
  90                         printf("No backend specified. Using OpenGL.\n");
  91                 }
  92         }
  93
  94         if(!init(api)) {
  95                 fprintf(stderr, "Failed to initialize program.\n");
  96                 return 1;
  97         }
  98
  99         glfwSetKeyCallback(win, clbk_key);
 100         glfwSetCursorPosCallback(win, clbk_motion);
 101         glfwSetMouseButtonCallback(win, clbk_mouse);
 102         glfwSetWindowSizeCallback(win, clbk_reshape);
 103
 104         glfwGetWindowSize(win, &win_w, &win_h);
 105         clbk_reshape(win, win_w, win_h);
 106
 107         while(!glfwWindowShouldClose(win)) {
 108                 display();
 109
 110                 glfwSwapBuffers(win);
 111                 glfwPollEvents();
 112         }
 113
 114         cleanup();
 115         // atexit(cleanup);
 116         return 0;
 117 }
 118
 119 static bool init(Gfx_API api)
 120 {
 121         if(!gfx_init(api))
 122                 return false;
 123
 124         fog_density = 0.0037;
 125
 126         sdr_man = new ShaderManager;
 127
 128         camera = new OrbitCamera;
 129
 130         cow_scene = new Scene;
 131         if(!cow_scene->load("data/spot/spot.obj")) {
 132                 fprintf(stderr, "Failed to load scene: spot.obj.\n");
 133                 return false;
 134         }
 135
 136         cow_rend = new MorphRenderer;
 137         cow_rend->camera = camera;
 138         cow_rend->scene = cow_scene;
 139
 140         if(!cow_rend->create()) {
 141                 fprintf(stderr, "Failed to create renderer for cows.\n");
 142                 return false;
 143         }
 144
 145         cow_object = cow_scene->objects[0];
 146
 147         terrain_tex = gfx_create_texture();
 148         if(!terrain_tex->load("data/grass.jpeg")) {
 149                 fprintf(stderr, "Failed to load ground texture.\n");
 150                 return false;
 151         }
 152
 153         Image ter_hmap;
 154         if(!ter_hmap.load("data/terhmap.png")) {
 155                 fprintf(stderr, "Failed to load terrain heightmap.\n");
 156                 return false;
 157         }
 158
 159         TerrainParams p;
 160         p.xsz = 200;
 161         p.ysz = 200;
 162         p.max_height = 30;
 163         p.xtiles = 40;
 164         p.ytiles = 40;
 165         p.tile_usub = 10;
 166         p.tile_vsub = 10;
 167         p.num_octaves = 3;
 168         p.noise_freq = 5;
 169         p.coarse_heightmap = ter_hmap;
 170
 171         terrain.init();
 172         terrain.generate(p);
 173
 174         terrain_mat.diffuse = Vec3(1, 1, 1);
 175         terrain_mat.specular = Vec3(0, 0, 0);
 176         terrain_mat.shininess = 40;
 177         terrain_mat.dtex = terrain_tex;
 178         terrain_mat.name = "tt";
 179
 180         terrain.material = terrain_mat;
 181
 182         terrain_rend = new Renderer;
 183         terrain_rend->camera = camera;
 184         terrain_rend->scene = terrain.get_visible(camera);
 185
 186         skybox_tex = gfx_create_texture();
 187         skybox_tex->load("data/cubemap/cubemap.hdr");
 188         terrain_rend->set_sky_tex(skybox_tex);
 189
 190         if(!terrain_rend->create()) {
 191                 fprintf(stderr, "terrain fail\n");
 192                 return false;
 193         }
 194
 195         return true;
 196 }
 197
 198 static void cleanup()
 199 {
 200         delete sdr_man;
 201         delete camera;
 202
 203         delete cow_scene;
 204         delete cow_rend;
 205
 206 //TODO
 207         delete terrain_tex;
 208         delete terrain_rend;
 209         gfx_cleanup();
 210 }
 211
 212 static float cow_speed = 10;
 213 static Vec3 cow_pos;
 214 static bool keystate[256];
 215
 216 static void clbk_key(GLFWwindow *win, int key, int scancode, int action, int mods)
 217 {
 218         if(action == GLFW_REPEAT) return;
 219
 220         if(action == GLFW_PRESS) {
 221                 switch(key) {
 222                 case GLFW_KEY_ESCAPE:
 223                         glfwSetWindowShouldClose(win, GLFW_TRUE);
 224                         return;
 225
 226                 case ' ':
 227                         move_camera = !move_camera;
 228                         break;
 229
 230                 case 'F':
 231                         fog_density = fog_density < 1 - 0.0009 ? fog_density + 0.0001 : 1;
 232                         break;
 233
 234                 case 'U':
 235                         fog_density = fog_density > 0.0001 ? fog_density - 0.0001 : 0;
 236                         break;
 237
 238                 default:
 239                         break;
 240                 }
 241         }
 242
 243         if(key < 256) {
 244                 keystate[key] = action == GLFW_PRESS;
 245         }
 246 }
 247
 248 static double prev_x, prev_y;
 249 static bool button[8];
 250
 251 static void clbk_motion(GLFWwindow *win, double x, double y)
 252 {
 253         double dx = x - prev_x;
 254         double dy = y - prev_y;
 255
 256         prev_x = x;
 257         prev_y = y;
 258
 259         if(button[0]) {
 260                 cam_theta += dx * 0.5;
 261                 cam_phi += dy * 0.5;
 262
 263                 if(cam_phi < 0)
 264                         cam_phi = 0;
 265                 if(cam_phi > 90)
 266                         cam_phi = 90;
 267         }
 268
 269         if(button[1]) {
 270                 cam_dist += dy * 0.1;
 271                 if(cam_dist < 0.0) {
 272                         cam_dist = 0.0;
 273                 }
 274         }
 275  }
 276
 277 static void clbk_mouse(GLFWwindow *win, int bn, int action, int mods)
 278 {
 279         button[bn] = action == GLFW_PRESS;
 280         glfwGetCursorPos(win, &prev_x, &prev_y);
 281 }
 282
 283 static void clbk_reshape(GLFWwindow *win, int width, int height)
 284 {
 285         gfx_viewport(0, 0, width, height);
 286         aspect = (float)width / (float)height;
 287         mprojection = calc_projection_matrix(45, aspect, 0.5, 1000.0);
 288
 289         win_h = height;
 290         win_w = width;
 291 }
 292
 293 static void update(float dt)
 294 {
 295         Vec3 dir;
 296
 297         if(keystate['D'])
 298                 dir.x += cow_speed * dt;
 299         if(keystate['A'])
 300                 dir.x -= cow_speed * dt;
 301         if(keystate['W'])
 302                 dir.z -= cow_speed * dt;
 303         if(keystate['S'])
 304                 dir.z += cow_speed * dt;
 305
 306         Vec3 *pos = move_camera ? &cam_pos : &cow_pos;
 307         float theta = cam_theta / 180.0 * M_PI;
 308         pos->x += dir.x * cos(theta) - dir.z * sin(theta);
 309         pos->z += dir.x * sin(theta) + dir.z * cos(theta);
 310 }
 311
 312 static void display()
 313 {
 314         static float prev_tsec;
 315         time_sec = glfwGetTime();
 316         float dt = time_sec - prev_tsec;
 317         prev_tsec = time_sec;
 318
 319         update(dt);
 320
 321         cam_pos.y = terrain.get_height(cam_pos) + 0.5;
 322         camera->set_orbit_params(cam_theta, cam_phi, cam_dist);
 323         camera->set_position(cam_pos.x, cam_pos.y, cam_pos.z);
 324
 325         gfx_clear(0.1, 0.1, 0.1);
 326
 327         printf("fog_density: %f\n", fog_density);
 328         terrain_rend->fog_density = fog_density;
 329         terrain_rend->draw();
 330
 331         cow_pos.y = terrain.get_height(cow_pos);
 332         cow_object->transform.translation(cow_pos);
 333         cow_rend->draw();
 334 }