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