int main( int argc, char **argv )
{
//printf("%d\n",win_width);
//printf("%d\n",win_height);
// Parse the arguments
if (argc < 2) {
printf("Missing arguments ... use:\n");
return -1;
}
set_up_chess();
step_max = atoi(argv[1]); // maximum level of recursions
// Optional arguments
for(int i = 2; i < argc; i++)
{
if (strcmp(argv[i], "+s") == 0) shadow_on = 1;
else if (strcmp(argv[i], "+l")==0) reflect_on = 1;
else if (strcmp(argv[i], "+c")==0) board_on = 1;
else if (strcmp(argv[i], "+r")==0) refract_on = 1;
else if (strcmp(argv[i], "+p")==0) antialias_on = 1;
else if (strcmp(argv[i], "+f")==0) diffuse_reflection_on = 1;
}
if(board_on) {
pl.height = -3;
pl.reflectance = 0.4;
pl.mat_ambient = vec3(0, 0, 0);
pl.mat_diffuse1 = vec3(4, 4, 4);
pl.mat_diffuse2 = vec3(0.0, 0.0, 0.0);
pl.mat_specular = vec3(1.0, 1.0, 1.0);
pl.shineness = 10;
}
//
// ray trace the scene now
//
// we have used so many global variables and this function is
// happy to carry no parameters
//
printf("Rendering scene using my fantastic ray tracer ...\n");
ray_trace();
printf("ray tracing ended\n");
// we want to make sure that intensity values are normalized
histogram_normalization();
// Show the result in glut via texture mapping
glutInit( &argc, argv );
glutInitDisplayMode( GLUT_RGBA | GLUT_DOUBLE );
glutInitWindowSize( WIN_WIDTH, WIN_HEIGHT );
glutCreateWindow( "Ray tracing" );
glewInit();
init();
glutDisplayFunc( display );
glutKeyboardFunc( keyboard );
glutMainLoop();
return 0;
}
/** Display callback; render the scene.
*/
void handle_display() {
// The ray itself.
ray3_t ray ;
ray.base = eye ;
color_t color ;
#ifndef NDEBUG
clock_t start_time, end_time ;
start_time = clock() ;
#endif
for (int x=0; x<win_width; ++x) {
for (int y=0; y<win_height; ++y) {
win2world(x, y, &ray.dir) ;
debug_c((x==400 && y==300),
"view ray = {(%f, %f, %f), (%f, %f, %f)}.\n",
eye.x, eye.y, eye.z,
ray.dir.x, ray.dir.y, ray.dir.z) ;
color = ray_trace(ray, 1.0 + EPSILON, FLT_MAX, 5) ;
*(fb+fb_offset(y, x, 0)) = color.red ;
*(fb+fb_offset(y, x, 1)) = color.green ;
*(fb+fb_offset(y, x, 2)) = color.blue ;
}
}
#ifndef NDEBUG
end_time = clock() ;
debug("handle_display(): frame calculation time = %f sec.",
((double)(end_time-start_time))/CLOCKS_PER_SEC) ;
#endif
glWindowPos2s(0, 0) ;
glDrawPixels(win_width, win_height, GL_RGB, GL_FLOAT, fb) ;
glFlush() ;
glutSwapBuffers() ;
}
void run(int w_start, int w_end, int h_start, int h_end, int *status, double *y, double *z)
{
for (int h = h_start; h <= h_end; h++) {
for (int w = w_start; w <= w_end; w++) {
int k = h * C_RESOLUTION_WIDTH + w;
ray_trace(w, h, status + k, y + k, z + k);
}
}
}