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

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <vector>
   5
   6 /* TODO: fix those */
   7 #include "camera.h"
   8 #include "mesh.h"
   9 #include "object.h"
  10 #include "scene.h"
  11
  12 #include "opengl/opengl.h"
  13 #include "vulkan/vk.h"
  14
  15 /* static functions */
  16
  17 static bool init();
  18 static void cleanup();
  19 static void display();
  20
  21 /* glfw callbacks */
  22 static void key_clbk(GLFWwindow *win, int key, int scancode, int action, int mods);
  23 static void motion_clbk(GLFWwindow *win, double x, double y);
  24 static void mouse_clbk(GLFWwindow *win, int button, int action, int mods);
  25
  26 /* global variables */
  27 bool use_vulkan;
  28
  29 GLFWwindow *win;
  30 int win_w = 800;
  31 int win_h = 600;
  32
  33 Camera *camera;
  34
  35 /* variables */
  36 // TODO: remove just for test:
  37 static Scene scene;
  38
  39 int main(int argc, char **argv)
  40 {
  41         for(int i=0; i<argc; ++i) {
  42                 if(strcmp(argv[i], "-opengl") == 0) {
  43                         use_vulkan = false;
  44                         printf("Backend: OpenGL.\n");
  45                 }
  46                 else if(strcmp(argv[i], "-vulkan") == 0) {
  47                         use_vulkan = true;
  48                         printf("Backend: Vulkan.\n");
  49                 }
  50                 else {
  51                         printf("No backend specified. Using OpenGL.\n");
  52                 }
  53         }
  54
  55         if(!init()) {
  56                 fprintf(stderr, "Failed to initialize program.\n");
  57                 return 1;
  58         }
  59
  60         glfwSetKeyCallback(win, key_clbk);
  61         glfwSetCursorPosCallback(win, motion_clbk);
  62         glfwSetMouseButtonCallback(win, mouse_clbk);
  63
  64         while(!glfwWindowShouldClose(win)) {
  65                 display();
  66
  67                 glfwSwapBuffers(win);
  68                 glfwPollEvents();
  69         }
  70
  71         atexit(cleanup);
  72         return 0;
  73 }
  74
  75 static bool init()
  76 {
  77         if(use_vulkan) {
  78                 if(!init_vulkan())
  79                         return false;
  80         }
  81         else {
  82                 if(!init_opengl())
  83                         return false;
  84         }
  85
  86         camera = new Camera(25, 25, 4, 45);
  87
  88         if(!scene.load("data/spot/spot_control_mesh.obj")) {
  89                 fprintf(stderr, "Failed to load scene.\n");
  90                 return false;
  91         }
  92
  93         for(size_t i=0; i<scene.objects.size(); ++i) {
  94                 printf("object: %d\n", (int)i);
  95                 printf("mesh: %s\n", scene.objects[i]->mesh->name.c_str());
  96                 printf("material: %s\n", scene.objects[i]->material->name.c_str());
  97                 printf("transform:\n");
  98                 scene.objects[i]->transform.print();
  99         }
 100         return true;
 101 }
 102
 103 static void cleanup()
 104 {
 105         if(use_vulkan) {
 106                 cleanup_vulkan();
 107         }
 108         else {
 109                 cleanup_opengl();
 110         }
 111
 112         delete camera;
 113 }
 114
 115 static void key_clbk(GLFWwindow *win, int key, int scancode, int action, int mods)
 116 {
 117         if(key == GLFW_KEY_ESCAPE && action == GLFW_PRESS) {
 118                 glfwSetWindowShouldClose(win, GLFW_TRUE);
 119         }
 120 }
 121
 122 static double prev_x, prev_y;
 123 static int bnstate[8];
 124
 125 static void motion_clbk(GLFWwindow *win, double x, double y)
 126 {
 127         int dx = x - prev_x;
 128         int dy = y - prev_y;
 129
 130         prev_x = x;
 131         prev_y = y;
 132
 133         if(!dx && !dy) return;
 134
 135         if(bnstate[0]) {
 136                 camera->theta += dx * 0.5;
 137                 camera->phi += dy * 0.5;
 138
 139                 if(camera->phi < -90) camera->phi = -90;
 140                 if(camera->phi > 90) camera->phi = 90;
 141         }
 142         if(bnstate[2]) {
 143                 camera->distance += dy * 0.1;
 144                 if(camera->distance < 0.0) camera->distance = 0.0;
 145         }
 146 }
 147
 148 static void mouse_clbk(GLFWwindow *win, int bn, int action, int mods)
 149 {
 150         bnstate[bn - GLFW_MOUSE_BUTTON_LEFT] = action == GLFW_PRESS ? 1 : 0;
 151         glfwGetCursorPos(win, &prev_x, &prev_y);
 152 }
 153
 154 static void display()
 155 {
 156         if(use_vulkan) {
 157                 display_vulkan();
 158         }
 159         else {
 160                 display_opengl();
 161         }
 162 }