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 "texture.h"
  20
  21 #include "opengl/opengl.h"
  22 #include "vulkan/vk.h"
  23
  24 /* static functions */
  25
  26 static bool init(Gfx_API api);
  27 static void cleanup();
  28 static void display();
  29
  30 /* glfw callbacks */
  31
  32 static void clbk_key(GLFWwindow *win, int key, int scancode, int action, int mods);
  33 static void clbk_motion(GLFWwindow *win, double x, double y);
  34 static void clbk_mouse(GLFWwindow *win, int button, int action, int mods);
  35 static void clbk_reshape(GLFWwindow *win, int width, int height);
  36
  37 /* global variables */
  38
  39 Mat4 mprojection;
  40
  41 GLFWwindow *win;
  42 int win_w = 800;
  43 int win_h = 600;
  44
  45 float phi = 25;
  46 float theta = 0;
  47 float dist = 4;
  48
  49 ShaderManager *sdr_man;
  50
  51 /* variables */
  52
  53 static float aspect;
  54 static OrbitCamera *camera;
  55
  56 static Scene *scene_cow;
  57 static Renderer *rcow;
  58
  59 static Scene *scene_ground;
  60 static Renderer *rground; // default renderer
  61 static Texture *gskybox;
  62
  63 /* *** */
  64
  65 int main(int argc, char **argv)
  66 {
  67         Gfx_API api;
  68
  69         for(int i=0; i<argc; ++i) {
  70                 if(strcmp(argv[i], "-opengl") == 0) {
  71                         api = GFX_GL;
  72                         printf("Backend: OpenGL.\n");
  73                 }
  74                 else if(strcmp(argv[i], "-vulkan") == 0) {
  75                         api = GFX_VK;
  76                         printf("Backend: Vulkan.\n");
  77                 }
  78                 else {
  79                         api = GFX_GL;
  80                         printf("No backend specified. Using OpenGL.\n");
  81                 }
  82         }
  83
  84         if(!init(api)) {
  85                 fprintf(stderr, "Failed to initialize program.\n");
  86                 return 1;
  87         }
  88
  89         glfwSetKeyCallback(win, clbk_key);
  90         glfwSetCursorPosCallback(win, clbk_motion);
  91         glfwSetMouseButtonCallback(win, clbk_mouse);
  92         glfwSetWindowSizeCallback(win, clbk_reshape);
  93
  94         glfwGetWindowSize(win, &win_w, &win_h);
  95         clbk_reshape(win, win_w, win_h);
  96
  97         while(!glfwWindowShouldClose(win)) {
  98                 display();
  99
 100                 glfwSwapBuffers(win);
 101                 glfwPollEvents();
 102         }
 103
 104         cleanup();
 105         // atexit(cleanup);
 106         return 0;
 107 }
 108
 109 static bool init(Gfx_API api)
 110 {
 111         if(!gfx_init(api))
 112                 return false;
 113
 114         sdr_man = new ShaderManager;
 115
 116         camera = new OrbitCamera;
 117         camera->set_orbit_params(phi, theta, dist);
 118
 119         scene_ground = new Scene;
 120         if(!scene_ground->load("data/ground.obj")) {
 121                 fprintf(stderr, "Failed to load scene: ground.obj.\n");
 122                 return false;
 123         }
 124
 125         scene_cow = new Scene;
 126         if(!scene_cow->load("data/spot/spot.obj")) {
 127                 fprintf(stderr, "Failed to load scene: spot.obj.\n");
 128                 return false;
 129         }
 130
 131         rground = new Renderer;
 132         rground->camera = camera;
 133         rground->scene = scene_ground;
 134
 135         if(!rground->create()) {
 136                 fprintf(stderr, "Failed to create default renderer.\n");
 137                 return false;
 138         }
 139
 140         gskybox = gfx_create_texture();
 141         gskybox->load("data/cubemap/cubemap.jpg");
 142         rground->set_sky_tex(gskybox);
 143
 144         rcow = new Renderer;
 145         rcow->camera = camera;
 146         rcow->scene = scene_cow;
 147
 148         if(!rcow->create()) {
 149                 fprintf(stderr, "Failed to create renderer for cows.\n");
 150                 return false;
 151         }
 152
 153 // TODO delete: debugging
 154         for(size_t i=0; i<scene_ground->objects.size(); ++i) {
 155                 printf("object: %d\n", (int)i);
 156                 printf("mesh: %s\n", scene_ground->objects[i]->mesh->name.c_str());
 157                 printf("material: %s\n", scene_ground->objects[i]->material->name.c_str());
 158                 printf("transform:\n");
 159                 scene_ground->objects[i]->transform.print();
 160         }
 161         return true;
 162 }
 163
 164 static void cleanup()
 165 {
 166         delete sdr_man;
 167         delete camera;
 168
 169         delete scene_cow;
 170         delete rcow;
 171
 172         delete scene_ground;
 173         delete rground;
 174
 175         gfx_cleanup();
 176 }
 177
 178 static void clbk_key(GLFWwindow *win, int key, int scancode, int action, int mods)
 179 {
 180         if(key == GLFW_KEY_ESCAPE && action == GLFW_PRESS) {
 181                 glfwSetWindowShouldClose(win, GLFW_TRUE);
 182         }
 183 }
 184
 185 static double prev_x, prev_y;
 186 static bool button[8];
 187
 188 static void clbk_motion(GLFWwindow *win, double x, double y)
 189 {
 190         double dx = x - prev_x;
 191         double dy = y - prev_y;
 192
 193         prev_x = x;
 194         prev_y = y;
 195
 196         if(button[0]) {
 197                 theta += dx;
 198                 phi += dy;
 199
 200                 if(phi < -90)
 201                         phi = -90;
 202                 if(phi > 90)
 203                         phi = 90;
 204         }
 205
 206         if(button[1]) {
 207                 dist += dy * 0.1;
 208                 if(dist < 0.0) {
 209                         dist = 0.0;
 210                 }
 211         }
 212 }
 213
 214 static void clbk_mouse(GLFWwindow *win, int bn, int action, int mods)
 215 {
 216         button[bn] = action == GLFW_PRESS;
 217         glfwGetCursorPos(win, &prev_x, &prev_y);
 218 }
 219
 220 static void clbk_reshape(GLFWwindow *win, int width, int height)
 221 {
 222         gfx_viewport(0, 0, width, height);
 223         aspect = (float)width / (float)height;
 224         mprojection = calc_projection_matrix(45, aspect, 0.5, 1000.0);
 225
 226         win_h = height;
 227         win_w = width;
 228 }
 229
 230 static void display()
 231 {
 232         camera->set_orbit_params(phi, theta, dist);
 233
 234         gfx_clear(0.76, 0.3, 0.43);
 235
 236         rground->draw();
 237         rcow->draw();
 238 }