//
// Initialize OpenGL to establish lighting and colors
// and initialize viewing and model parameter
//
void initialize(){
// initialize modelview matrix to identity
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
// specify window clear (background) color to be black
glClearColor(0, 0, 0, 0);
// position light and turn it on
glEnable(GL_LIGHT0);
glEnable(GL_LIGHT1);
glEnable(GL_LIGHT2);
// initialize viewing and model parameters
setInitialState();
updateProjection();
//read in OBJFile
objfile.read();
psurf = objfile.getscene();
// This is texture map sent to texture memory without mipmapping:
//glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, TEXTUREWIDTH, TEXTUREHEIGHT,
// 0, GL_RGBA, GL_UNSIGNED_BYTE, TextureImage);
}
//
// Load the scene and get the centroid and bounding box
//
void load_scene(PolySurf **scene, OBJFile &objfile){
int err = objfile.read();
*scene = objfile.getscene();
if(err || scene == NULL){
char *filename = objfile.getfilename();
cerr << "OBJ file " << filename << " has errors" << endl;
exit(2);
}
}
//
// Main program to create window, setup callbacks, and initiate GLUT
//
int main(int argc, char* argv[]){
int suffix;
//parse command line arguments
switch(argc){
case 4:
image = new ImageFile();
saveName = argv[3];
wFileExists = true;
case 3:
Nrays = atoi(argv[2]);
case 2:
suffix = strlen(argv[1]) - 4;
if(strcmp(&(argv[1][suffix]), ".obj") != 0){
std::cerr<< "Invalid file suffix: " << suffix << std::endl;
exit(1);
}
objfile.setfilename(argv[1]);
break;
case 1:
default:
std::cerr<< "invalid number of arguments "<< std::endl;
exit(-1);
break;
}
args = argv;
//add to the lights vector
gl_lightspos.push_back(Vector3d(100,100,100));
gl_lightspos.push_back(Vector3d(-100,100,40));
cam = new Camera(Vector3d(0., 0., 0.), Vector3d(0., 0., -1.), Vector3d(0., 1., 0.), 1.0);
// start up the glut utilities
glutInit(&argc, argv);
// create the graphics window, giving width, height, and title text
// and establish double buffering, RGBA color
// Depth buffering must be available for drawing the shaded model
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA | GLUT_DEPTH);
glutInitWindowSize(WIDTH, HEIGHT);
glutCreateWindow("3D Texture Viewer with Mipmaps");
// register callback to draw graphics when window needs updating
glutDisplayFunc(doDisplay);
glutReshapeFunc(doReshape);
glutKeyboardFunc(handleKey);
glutMouseFunc(handleButtons);
glutMotionFunc(handleMotion);
initialize();
glutMainLoop();
}
//
// Validate command line, and initialize viewport width, and output filename
//
void get_commandline(int argc, char *argv[], OBJFile &objfile){
int suffix;
if(argc < 2 || argc > 3)
goto abort;
suffix = strlen(argv[1]) - 4;
if(strcmp(&(argv[1][suffix]), ".obj") != 0)
goto abort;
objfile.setfilename(argv[1]);
return;
abort:
cerr << "usage: objview filename.obj [nrays]" << endl;
exit(1);
}
