Error while trying to execute an OptiX program

[sienaiwun]

@mdkoa1

You might not be using a valid device number for rendering. Most likely, you have more than 1 Graphics Card on your system.

It is best to do a debug and step through the specific code in SampleScene.cpp. You might be using your non-nvidia card for rendering when you set your device:

if(m_num_devices)
{
int max_num_devices = Context::getDeviceCount();
int actual_num_devices = std::min( max_num_devices, std::max( 1, m_num_devices ) );
std::vector devs(actual_num_devices);
for( int i = 0; i < actual_num_devices; ++i ) devs[i] = i;
m_context->setDevices( devs.begin(), devs.end() );
}

You might have to activate your Nvidia graphics card for customized rendering through your own nvidia drivers control panel (Under Manage 3D Settings) if i’m not wrong.

Thanks. But I only have a GTX 570 graphic card.
and I use the code
std::vector enabled_devices = rtContext->getEnabledDevices();
only one device index is in this vector.

and I use your code as
int max_num_devices = Context::getDeviceCount();
int actual_num_devices = std::min( max_num_devices, std::max( 1, max_num_devices ) );
std::vector devs(actual_num_devices);
for( int i = 0; i < max_num_devices; ++i ) devs[i] = i;
rtContext->setDevices( devs.begin(), devs.end() );
the error is still the same.

what can I do to deal with it?