void changePlaybackSpeed(int ratioDiff)
{
float ratio = (float)pow(2.0, ratioDiff);
float speed = getPlaybackSpeed() * ratio;
if (speed < 0)
{
speed = 0;
}
openni::Status rc = setPlaybackSpeed(speed);
if (rc == openni::STATUS_OK)
{
if (speed == 0)
{
displayMessage("Playback speed set to fastest");
}
else
{
displayMessage("Playback speed set to x%.2f", speed);
}
}
else if ((rc == openni::STATUS_NOT_IMPLEMENTED) || (rc == openni::STATUS_NOT_SUPPORTED) || (rc == openni::STATUS_BAD_PARAMETER))
{
displayError("Playback speed is not supported");
}
else
{
displayError("Error setting playback speed:\n%s", openni::OpenNI::getExtendedError());
}
}
void drawPlaybackSpeed()
{
XnDouble dSpeed = getPlaybackSpeed();
if (dSpeed != 1.0)
{
XnChar strSpeed[30];
int len = sprintf(strSpeed, "x%g", dSpeed);
int width = 0;
for (int i = 0; i < len; ++i)
width += glutBitmapWidth(GLUT_BITMAP_TIMES_ROMAN_24, strSpeed[i]);
glColor3f(0, 1, 0);
glRasterPos2i(WIN_SIZE_X - width - 3, 30);
glPrintString(GLUT_BITMAP_TIMES_ROMAN_24, strSpeed);
}
}
