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

   1 #include <GL/glew.h>
   2 #include <GL/glut.h>
   3
   4 #include <assert.h>
   5 #include <stdlib.h>
   6 #include <stdio.h>
   7 #include <string>
   8
   9 #include "mesh.h"
  10 #include "hair.h"
  11
  12 #define MAX_NUM_SPAWNS 500
  13
  14 static bool init();
  15 static void cleanup();
  16 static void display();
  17 static void reshape(int x, int y);
  18 static void keydown(unsigned char key, int x, int y);
  19 static void mouse(int bn, int st, int x, int y);
  20 static void motion(int x, int y);
  21
  22 static std::vector<Mesh*> meshes;
  23 static Mesh *mesh_head;
  24 static Hair hair;
  25
  26 int win_width, win_height;
  27 float cam_theta, cam_phi = 25, cam_dist = 8;
  28
  29 int main(int argc, char **argv)
  30 {
  31         glutInit(&argc, argv);
  32         glutInitWindowSize(800, 600);
  33         glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
  34         glutCreateWindow("hair test");
  35
  36         glutDisplayFunc(display);
  37         glutReshapeFunc(reshape);
  38         glutKeyboardFunc(keydown);
  39         glutMouseFunc(mouse);
  40         glutMotionFunc(motion);
  41
  42         if(!init()) {
  43                 return 1;
  44         }
  45         atexit(cleanup);
  46
  47         glutMainLoop();
  48         return 0;
  49 }
  50
  51 static bool init()
  52 {
  53         glewInit();
  54
  55         glEnable(GL_DEPTH_TEST);
  56         glEnable(GL_CULL_FACE);
  57         glEnable(GL_COLOR_MATERIAL);
  58
  59         glEnable(GL_LIGHTING);
  60         glEnable(GL_LIGHT0);
  61
  62         glClearColor(0.5, 0.5, 0.5, 1);
  63         meshes = load_meshes("data/head.fbx");
  64         if (meshes.empty()) {
  65                 fprintf(stderr, "Failed to load mesh.\n");
  66                 return false;
  67         }
  68
  69         for(size_t i=0; i<meshes.size(); i++) {
  70                 meshes[i]->calc_bbox();
  71
  72                 Vec3 v0 = meshes[i]->bbox.v0;
  73                 Vec3 v1 = meshes[i]->bbox.v1;
  74
  75                 printf("mesh: %s\n", meshes[i]->name.c_str());
  76                 printf("AABB mesh %d: v0: (%f, %f, %f) v1: (%f, %f, %f)\n",
  77                                 (int)i, v0.x, v0.y, v0.z, v1.x, v1.y, v1.z);
  78
  79                 meshes[i]->update_vbo(MESH_ALL);
  80                 printf("num vertices: %d num triangles: %d\n",
  81                                 (int)meshes[i]->vertices.size(),
  82                                 (int)meshes[i]->indices.size() / 3);
  83
  84                 if(meshes[i]->name == "head") {
  85                         mesh_head = meshes[i];
  86                 }
  87         }
  88         if(!mesh_head) {
  89                 fprintf(stderr, "Failed to find the head mesh.\n");
  90                 return false;
  91         }
  92
  93         if(!hair.init(mesh_head, MAX_NUM_SPAWNS, 0.1)) {
  94                 fprintf(stderr, "Failed to initialize hair\n");
  95                 return false;
  96         }
  97
  98         return true;
  99 }
 100
 101 static void cleanup()
 102 {
 103         for(size_t i=0; i<meshes.size(); i++) {
 104                 delete meshes[i];
 105         }
 106 }
 107
 108 static void display()
 109 {
 110         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 111
 112         glMatrixMode(GL_MODELVIEW);
 113         glLoadIdentity();
 114         glTranslatef(0, 0, -cam_dist);
 115         glRotatef(cam_phi, 1, 0, 0);
 116         glRotatef(cam_theta, 0, 1, 0);
 117
 118         for(size_t i=0; i<meshes.size(); i++) {
 119                 meshes[i]->draw();
 120         }
 121
 122         hair.draw();
 123
 124         glutSwapBuffers();
 125         assert(glGetError() == GL_NO_ERROR);
 126 }
 127
 128 static void reshape(int x, int y)
 129 {
 130         glViewport(0, 0, x, y);
 131         win_width = x;
 132         win_height = y;
 133
 134         glMatrixMode(GL_PROJECTION);
 135         glLoadIdentity();
 136         gluPerspective(50.0, (float)x / (float)y, 0.5, 500.0);
 137 }
 138
 139 static void keydown(unsigned char key, int /*x*/, int /*y*/)
 140 {
 141         switch(key) {
 142         case 27:
 143                 exit(0);
 144         }
 145 }
 146
 147 bool bnstate[8];
 148 int prev_x, prev_y;
 149
 150 static void mouse(int bn, int st, int x, int y)
 151 {
 152         bnstate[bn] = st == GLUT_DOWN;
 153         prev_x = x;
 154         prev_y = y;
 155 }
 156
 157 static void motion(int x, int y)
 158 {
 159         int dx = x - prev_x;
 160         int dy = y - prev_y;
 161         prev_x = x;
 162         prev_y = y;
 163
 164         if(!dx && !dy) return;
 165
 166         if(bnstate[0]) {
 167                 cam_theta += dx * 0.5;
 168                 cam_phi += dy * 0.5;
 169
 170                 if(cam_phi < -90) cam_phi = -90;
 171                 if(cam_phi > 90) cam_phi = 90;
 172                 glutPostRedisplay();
 173         }
 174         if(bnstate[2]) {
 175                 cam_dist += dy * 0.1;
 176                 if(cam_dist < 0) cam_dist = 0;
 177                 glutPostRedisplay();
 178         }
 179 }