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 "object.h"
  17 #include "renderer.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 float phi = 25;
  47 float theta = 0;
  48 float dist = 16;
  49
  50 ShaderManager *sdr_man;
  51
  52 /* variables */
  53
  54 static float aspect;
  55 static OrbitCamera *camera;
  56
  57 static Scene *scene_cow;
  58 static Renderer *rcow;
  59
  60 static Scene *scene_ground;
  61 static Renderer *rground; // default renderer
  62 static Texture *gskybox;
  63
  64 static Renderer *tr;
  65 static Material tmat;
  66 static Terrain t;
  67
  68 /* *** */
  69
  70 int main(int argc, char **argv)
  71 {
  72         Gfx_API api;
  73
  74         for(int i=0; i<argc; ++i) {
  75                 if(strcmp(argv[i], "-opengl") == 0) {
  76                         api = GFX_GL;
  77                         printf("Backend: OpenGL.\n");
  78                 }
  79                 else if(strcmp(argv[i], "-vulkan") == 0) {
  80                         api = GFX_VK;
  81                         printf("Backend: Vulkan.\n");
  82                 }
  83                 else {
  84                         api = GFX_GL;
  85                         printf("No backend specified. Using OpenGL.\n");
  86                 }
  87         }
  88
  89         if(!init(api)) {
  90                 fprintf(stderr, "Failed to initialize program.\n");
  91                 return 1;
  92         }
  93
  94         glfwSetKeyCallback(win, clbk_key);
  95         glfwSetCursorPosCallback(win, clbk_motion);
  96         glfwSetMouseButtonCallback(win, clbk_mouse);
  97         glfwSetWindowSizeCallback(win, clbk_reshape);
  98
  99         glfwGetWindowSize(win, &win_w, &win_h);
 100         clbk_reshape(win, win_w, win_h);
 101
 102         while(!glfwWindowShouldClose(win)) {
 103                 display();
 104
 105                 glfwSwapBuffers(win);
 106                 glfwPollEvents();
 107         }
 108
 109         cleanup();
 110         // atexit(cleanup);
 111         return 0;
 112 }
 113
 114 static bool init(Gfx_API api)
 115 {
 116         if(!gfx_init(api))
 117                 return false;
 118
 119         sdr_man = new ShaderManager;
 120
 121         camera = new OrbitCamera;
 122
 123         // scene_ground = new Scene;
 124         // if(!scene_ground->load("data/ground.obj")) {
 125         //      fprintf(stderr, "Failed to load scene: ground.obj.\n");
 126         //      return false;
 127         // }
 128
 129         // rground = new Renderer;
 130         // rground->camera = camera;
 131         // rground->scene = scene_ground;
 132
 133         // if(!rground->create()) {
 134         //      fprintf(stderr, "Failed to create default renderer.\n");
 135         //      return false;
 136         // }
 137
 138         // gskybox = gfx_create_texture();
 139         // gskybox->load("data/cubemap/cubemap.hdr");
 140         // rground->set_sky_tex(gskybox);
 141
 142         scene_cow = new Scene;
 143         if(!scene_cow->load("data/spot/spot.obj")) {
 144                 fprintf(stderr, "Failed to load scene: spot.obj.\n");
 145                 return false;
 146         }
 147
 148         rcow = new Renderer;
 149         rcow->camera = camera;
 150         rcow->scene = scene_cow;
 151
 152         if(!rcow->create()) {
 153                 fprintf(stderr, "Failed to create renderer for cows.\n");
 154                 return false;
 155         }
 156
 157         TerrainParams p;
 158         p.xsz = 50;
 159         p.ysz = 50;
 160         p.max_height = 2;
 161         p.xtiles = 20;
 162         p.ytiles = 20;
 163         p.tile_usub = 10;
 164         p.tile_vsub = 10;
 165         p.num_octaves = 3;
 166         p.noise_freq = 10;
 167         p.coarse_heightmap = 0;
 168
 169         t.init();
 170         t.generate(p);
 171
 172         tmat.diffuse = Vec3(1, 0, 0);
 173         tmat.specular = Vec3(0.5, 0, 0);
 174         tmat.shininess = 40;
 175         tmat.dtex = 0;
 176         tmat.name = "tt";
 177
 178         t.material = tmat;
 179
 180         tr = new Renderer;
 181         tr->camera = camera;
 182         tr->scene = t.get_visible(camera);
 183         if(!tr->create()) {
 184                 fprintf(stderr, "terrain fail\n");
 185                 return false;
 186         }
 187
 188
 189 // TODO delete: debugging
 190         // for(size_t i=0; i<scene_ground->objects.size(); ++i) {
 191         //      printf("object: %d\n", (int)i);
 192         //      printf("mesh: %s\n", scene_ground->objects[i]->mesh->name.c_str());
 193         //      printf("material: %s\n", scene_ground->objects[i]->material->name.c_str());
 194         //      printf("transform:\n");
 195         //      scene_ground->objects[i]->transform.print();
 196         // }
 197         return true;
 198 }
 199
 200 static void cleanup()
 201 {
 202         delete sdr_man;
 203         delete camera;
 204
 205         delete scene_cow;
 206         delete rcow;
 207
 208         // delete scene_ground;
 209         // delete rground;
 210
 211 //TODO
 212         delete tr;
 213         gfx_cleanup();
 214 }
 215
 216 static void clbk_key(GLFWwindow *win, int key, int scancode, int action, int mods)
 217 {
 218         if(key == GLFW_KEY_ESCAPE && action == GLFW_PRESS) {
 219                 glfwSetWindowShouldClose(win, GLFW_TRUE);
 220         }
 221 }
 222
 223 static double prev_x, prev_y;
 224 static bool button[8];
 225
 226 static void clbk_motion(GLFWwindow *win, double x, double y)
 227 {
 228         double dx = x - prev_x;
 229         double dy = y - prev_y;
 230
 231         prev_x = x;
 232         prev_y = y;
 233
 234         if(button[0]) {
 235                 theta += dx * 0.5;
 236                 phi += dy * 0.5;
 237
 238                 if(phi < 0)
 239                         phi = 0;
 240                 if(phi > 90)
 241                         phi = 90;
 242         }
 243
 244         if(button[1]) {
 245                 dist += dy * 0.1;
 246                 if(dist < 0.0) {
 247                         dist = 0.0;
 248                 }
 249         }
 250 }
 251
 252 static void clbk_mouse(GLFWwindow *win, int bn, int action, int mods)
 253 {
 254         button[bn] = action == GLFW_PRESS;
 255         glfwGetCursorPos(win, &prev_x, &prev_y);
 256 }
 257
 258 static void clbk_reshape(GLFWwindow *win, int width, int height)
 259 {
 260         gfx_viewport(0, 0, width, height);
 261         aspect = (float)width / (float)height;
 262         mprojection = calc_projection_matrix(45, aspect, 0.5, 1000.0);
 263
 264         win_h = height;
 265         win_w = width;
 266 }
 267
 268 static void display()
 269 {
 270         camera->set_orbit_params(theta, phi, dist);
 271
 272         // gfx_clear(0.76, 0.3, 0.43);
 273         gfx_clear(0.1, 0.1, 0.1);
 274
 275         tr->draw();
 276 //      rground->draw();
 277         // rcow->draw();
 278 }