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