Game Development Reference
In-Depth Information
/* detect the markers in the video frame */
if( arDetectMarker(dataPtr, thresh, &marker_info, &marker_num) < 0 ) {
cleanup();
exit(0);
}
arVideoCapNext();
/* check for object visibility */
k = -1;
for( j = 0; j < marker_num; j++ ) {
if( patt_id == marker_info[j].id ) {
if( k == -1 ) k = j;
else if( marker_info[k].cf < marker_info[j].cf ) k = j;
}
}
if( k == -1 ) {
argSwapBuffers();
return;
}
/* get the transformation between the marker and the real camera */
arGetTransMat(&marker_info[k], patt_center, patt_width, patt_trans);
draw();
argSwapBuffers();
}
static void init( void )
{
ARParam wparam;
/* open the video path */
if( arVideoOpen( vconf ) < 0 ) exit(0);
/* find the size of the window */
if( arVideoInqSize(&xsize, &ysize) < 0 ) exit(0);
printf("Image size (x,y) = (%d,%d)\n", xsize, ysize);
/* set the initial camera parameters */
if( arParamLoad(cparam_name, 1, &wparam) < 0 ) {
printf("Camera parameter load error !!\n");
exit(0);
}
arParamChangeSize( &wparam, xsize, ysize, &cparam );
arInitCparam( &cparam );
printf("*** Camera Parameter ***\n");
arParamDisp( &cparam );
