Method begin

Engine/source/gfx/gl/gfxGLOcclusionQuery.cpp:40–54

}

bool GFXGLOcclusionQuery::begin()
{
   if (GFXDevice::getDisableOcclusionQuery())
      return true;

   if (!glIsQuery(mQuery))
      glGenQueries(1, &mQuery);

   if (!mTesting)
   {
      glBeginQuery(GL_SAMPLES_PASSED, mQuery);
      mTesting = true;
   }
   return true;
}

void GFXGLOcclusionQuery::end()
{