OtfTransmittanceMapOccluder::OtfTransmittanceMapOccluder(Renderer::CPtr renderer,
Camera::CPtr camera,
const size_t numSamples)
: m_renderer(renderer), m_camera(camera)
{
// Record resolution of camera
m_resolution = m_camera->resolution();
m_floatRasterBounds = static_cast<Imath::V2f>(m_resolution);
m_intRasterBounds = m_resolution - Imath::V2i(1);
// Update transmittance map size and sample count
m_transmittanceMap.setSize(m_resolution.x, m_resolution.y);
m_transmittanceMap.setNumSamples(numSamples);
// Reset the list of computed pixels
m_computed.resize(m_resolution.x * m_resolution.y, 0);
// Check if space behind camera is valid
m_clipBehindCamera = !camera->canTransformNegativeCamZ();
}
TransmittanceMapOccluder::TransmittanceMapOccluder(Renderer::CPtr baseRenderer,
Camera::CPtr camera,
const size_t numSamples)
: m_camera(camera)
{
// Clone Renderer to create a mutable copy
Renderer::Ptr renderer = baseRenderer->clone();
// Configure Renderer
renderer->setCamera(camera);
renderer->setPrimaryEnabled(false);
renderer->setTransmittanceMapEnabled(true);
renderer->setNumDeepSamples(numSamples);
// Execute render and grab transmittace map
renderer->execute();
m_transmittanceMap = renderer->transmittanceMap();
// Record the bounds of the transmittance map
m_rasterBounds = static_cast<Imath::V2f>(m_transmittanceMap->size());
// Check if space behind camera is valid
m_clipBehindCamera = !camera->canTransformNegativeCamZ();
}