OcclusionQuery::OcclusionQuery(OEngine::Render::OgreRenderer* renderer, SceneNode* sunNode) :
mSunTotalAreaQuery(0), mSunVisibleAreaQuery(0), mActiveQuery(0),
mDoQuery(0), mSunVisibility(0),
mWasVisible(false),
mActive(false),
mFirstFrame(true)
{
mRendering = renderer;
mSunNode = sunNode;
try {
RenderSystem* renderSystem = Root::getSingleton().getRenderSystem();
mSunTotalAreaQuery = renderSystem->createHardwareOcclusionQuery();
mSunVisibleAreaQuery = renderSystem->createHardwareOcclusionQuery();
mSupported = (mSunTotalAreaQuery != 0) && (mSunVisibleAreaQuery != 0);
}
catch (Ogre::Exception& e)
{
mSupported = false;
}
if (!mSupported)
{
std::cout << "Hardware occlusion queries not supported." << std::endl;
return;
}
mBBNodeReal = mRendering->getScene()->getRootSceneNode()->createChildSceneNode();
static Ogre::Mesh* plane = MeshManager::getSingleton().createPlane("occlusionbillboard",
ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME, Ogre::Plane(Ogre::Vector3(0,0,1), 0), 1, 1, 1, 1, true, 1, 1, 1, Vector3::UNIT_Y).get();
plane->_setBounds(Ogre::AxisAlignedBox::BOX_INFINITE);
mBBQueryTotal = mRendering->getScene()->createEntity("occlusionbillboard");
mBBQueryTotal->setCastShadows(false);
mBBQueryTotal->setVisibilityFlags(RV_OcclusionQuery);
mBBQueryTotal->setRenderQueueGroup(RQG_OcclusionQuery+1);
mBBQueryTotal->setMaterialName("QueryTotalPixels");
mBBNodeReal->attachObject(mBBQueryTotal);
mBBQueryVisible = mRendering->getScene()->createEntity("occlusionbillboard");
mBBQueryVisible->setCastShadows(false);
mBBQueryVisible->setVisibilityFlags(RV_OcclusionQuery);
mBBQueryVisible->setRenderQueueGroup(RQG_OcclusionQuery+1);
mBBQueryVisible->setMaterialName("QueryVisiblePixels");
mBBNodeReal->attachObject(mBBQueryVisible);
mRendering->getScene()->addRenderObjectListener(this);
mRendering->getScene()->addRenderQueueListener(this);
mDoQuery = true;
}
OcclusionQuery::OcclusionQuery(OEngine::Render::OgreRenderer* renderer, SceneNode* sunNode) :
mSunTotalAreaQuery(0), mSunVisibleAreaQuery(0), mSingleObjectQuery(0), mActiveQuery(0),
mDoQuery(0), mSunVisibility(0), mQuerySingleObjectStarted(false), mTestResult(false),
mQuerySingleObjectRequested(false), mWasVisible(false), mObjectWasVisible(false), mDoQuery2(false),
mBBNode(0)
{
mRendering = renderer;
mSunNode = sunNode;
try {
RenderSystem* renderSystem = Root::getSingleton().getRenderSystem();
mSunTotalAreaQuery = renderSystem->createHardwareOcclusionQuery();
mSunVisibleAreaQuery = renderSystem->createHardwareOcclusionQuery();
mSingleObjectQuery = renderSystem->createHardwareOcclusionQuery();
mSupported = (mSunTotalAreaQuery != 0) && (mSunVisibleAreaQuery != 0) && (mSingleObjectQuery != 0);
}
catch (Ogre::Exception e)
{
mSupported = false;
}
if (!mSupported)
{
std::cout << "Hardware occlusion queries not supported." << std::endl;
return;
}
MaterialPtr matBase = MaterialManager::getSingleton().getByName("BaseWhiteNoLighting");
MaterialPtr matQueryArea = matBase->clone("QueryTotalPixels");
matQueryArea->setDepthWriteEnabled(false);
matQueryArea->setColourWriteEnabled(false);
matQueryArea->setDepthCheckEnabled(false); // Not occluded by objects
MaterialPtr matQueryVisible = matBase->clone("QueryVisiblePixels");
matQueryVisible->setDepthWriteEnabled(false);
matQueryVisible->setColourWriteEnabled(false); // Uncomment this to visualize the occlusion query
matQueryVisible->setDepthCheckEnabled(true); // Occluded by objects
matQueryVisible->setCullingMode(CULL_NONE);
matQueryVisible->setManualCullingMode(MANUAL_CULL_NONE);
if (sunNode)
mBBNode = mSunNode->getParentSceneNode()->createChildSceneNode();
mObjectNode = mRendering->getScene()->getRootSceneNode()->createChildSceneNode();
mBBNodeReal = mRendering->getScene()->getRootSceneNode()->createChildSceneNode();
mBBQueryTotal = mRendering->getScene()->createBillboardSet(1);
mBBQueryTotal->setCastShadows(false);
mBBQueryTotal->setDefaultDimensions(150, 150);
mBBQueryTotal->createBillboard(Vector3::ZERO);
mBBQueryTotal->setMaterialName("QueryTotalPixels");
mBBQueryTotal->setRenderQueueGroup(RQG_OcclusionQuery+1);
mBBQueryTotal->setVisibilityFlags(RV_OcclusionQuery);
mBBNodeReal->attachObject(mBBQueryTotal);
mBBQueryVisible = mRendering->getScene()->createBillboardSet(1);
mBBQueryVisible->setCastShadows(false);
mBBQueryVisible->setDefaultDimensions(150, 150);
mBBQueryVisible->createBillboard(Vector3::ZERO);
mBBQueryVisible->setMaterialName("QueryVisiblePixels");
mBBQueryVisible->setRenderQueueGroup(RQG_OcclusionQuery+1);
mBBQueryVisible->setVisibilityFlags(RV_OcclusionQuery);
mBBNodeReal->attachObject(mBBQueryVisible);
mBBQuerySingleObject = mRendering->getScene()->createBillboardSet(1);
/// \todo ideally this should occupy exactly 1 pixel on the screen
mBBQuerySingleObject->setCastShadows(false);
mBBQuerySingleObject->setDefaultDimensions(0.003, 0.003);
mBBQuerySingleObject->createBillboard(Vector3::ZERO);
mBBQuerySingleObject->setMaterialName("QueryVisiblePixels");
mBBQuerySingleObject->setRenderQueueGroup(RQG_OcclusionQuery);
mBBQuerySingleObject->setVisibilityFlags(RV_OcclusionQuery);
mObjectNode->attachObject(mBBQuerySingleObject);
mRendering->getScene()->addRenderObjectListener(this);
mRendering->getScene()->addRenderQueueListener(this);
mDoQuery = true;
}
