source: trunk/VUT/Ogre/src/OgreOctreeHierarchyInterface.cpp @ 174

#include "OgreOctreeHierarchyInterface.h"
#include "OgreVisibilityOctreeSceneManager.h"
#include <OgreOctree.h>
#include <OgreLogManager.h>
#include <OgreStringConverter.h>


namespace Ogre {

//-----------------------------------------------------------------------
OctreeHierarchyInterface::OctreeHierarchyInterface(OctreeSceneManager *sm, RenderSystem *rsys): 
SceneNodeHierarchyInterface(sm, rsys)
{
}
//-----------------------------------------------------------------------
void OctreeHierarchyInterface::TraverseNode(GtpVisibility::HierarchyNode *node)
{
        ++ mNumTraversedNodes;

        Octree *octree = static_cast<Octree *>(node);

        // if we come across some renderable geometry => render it
        if (octree->mNodes.size() > 0)
        {
                RenderNode(node);
        }
        
        //if (octree->numNodes() > (int)octree->mNodes.size()) // if not all subtrees are empty
        if (!IsLeaf(node))
        {
                for(int i=0; i<8; ++i)
                {
                        Octree *nextChild = 
                                octree->mChildren[(i & 4) >> 2][(i & 2) >> 1][i & 1];

                        if (nextChild)
                        {
                                mDistanceQueue->push(nextChild);
                        }
                }
        }
}
//-----------------------------------------------------------------------
bool OctreeHierarchyInterface::IsLeaf(GtpVisibility::HierarchyNode *node) const
{
        Octree *octree = static_cast<Octree *>(node);
        // HACK: if there are subtrees, they are empty => we are not interested in them
        return octree->numNodes() == (int)octree->mNodes.size();
}
//-----------------------------------------------------------------------
bool OctreeHierarchyInterface::HasGeometry(GtpVisibility::HierarchyNode *node) const
{
        return static_cast<Octree *>(node)->mNodes.size() > 0;
}
//-----------------------------------------------------------------------
float OctreeHierarchyInterface::GetSquaredDistance(GtpVisibility::HierarchyNode *node) const
{
        AxisAlignedBox *box = &static_cast<Octree *>(node)->mBox;
        Vector3 mid = ((box->getMaximum() - box->getMinimum()) * 0.5) + box->getMinimum();

        return (mCullCamera->getDerivedPosition() - mid).squaredLength();
}
//-----------------------------------------------------------------------
void OctreeHierarchyInterface::SetNodeVisible(GtpVisibility::HierarchyNode *node, 
                                                                                          const bool visible)
{
#ifdef GTP_VISIBILITY_MODIFIED_OGRE
        static_cast<Octree *>(node)->setOctreeVisible(visible);
#endif
}
//-----------------------------------------------------------------------
void OctreeHierarchyInterface::SetLastVisited(GtpVisibility::HierarchyNode *node, 
                                                                                          const unsigned int frameId)
{
#ifdef GTP_VISIBILITY_MODIFIED_OGRE
        static_cast<Octree *>(node)->setLastVisited(frameId);
#endif
}
//-----------------------------------------------------------------------
void OctreeHierarchyInterface::PullUpVisibility(GtpVisibility::HierarchyNode *node)
{               
#ifdef GTP_VISIBILITY_MODIFIED_OGRE
        Octree *octant = static_cast<Octree *>(node);

        while (octant && !octant->isOctreeVisible())
        {
                octant->setOctreeVisible(true);
                octant = octant->getParent();
        }
#endif
}
//-----------------------------------------------------------------------
void OctreeHierarchyInterface::RenderNode(GtpVisibility::HierarchyNode *node)
{
#ifdef GTP_VISIBILITY_MODIFIED_OGRE
        Octree *octant = static_cast<Octree *>(node);

        if (octant->lastRendered() != mFrameId)
        {
                octant->setLastRendered(mFrameId);

                dynamic_cast<OctreeSceneManager *>(mSceneManager)->_renderOctant(mCamera, 
                        octant, mOnlyShadowCasters, mLeavePassesInQueue);

                mVisibleNodes.push_back(node);
        }
#endif
}
//-----------------------------------------------------------------------
bool OctreeHierarchyInterface::IsNodeVisible(GtpVisibility::HierarchyNode *node) const
{
#ifdef GTP_VISIBILITY_MODIFIED_OGRE
        return static_cast<Octree *>(node)->isOctreeVisible();
#else
        return true;
#endif
}
//-----------------------------------------------------------------------
unsigned int OctreeHierarchyInterface::LastVisited(GtpVisibility::HierarchyNode *node) const
{
#ifdef GTP_VISIBILITY_MODIFIED_OGRE
        return static_cast<Octree *>(node)->lastVisited();
#else
        return 0;
#endif
}
//-----------------------------------------------------------------------
AxisAlignedBox *OctreeHierarchyInterface::GetBoundingBox(GtpVisibility::HierarchyNode *node)
{
        if (node != mSavedNode)
        {
                mSavedNode = node;
            //static_cast<Octree *>(node)->_getCullBounds(&mBox);
                mBox = static_cast<Octree *>(node)->_getWorldAABB();
        }

        return &mBox;
}
//-----------------------------------------------------------------------
void OctreeHierarchyInterface::VisualizeCulledNode(GtpVisibility::HierarchyNode *node, 
                                                                                                   GtpVisibility::CullingType type)
{
        WireBoundingBox *box = static_cast<Octree *>(node)->getWireBoundingBox();

        if (type == GtpVisibility::FRUSTUM_CULLED)
        {
                box->setMaterial("FrustumCulledNodesMaterial");
        }
        else // type == GtpVisibility::QUERY_CULLED
        {
                box->setMaterial("QueryCulledNodesMaterial");
        }

        dynamic_cast<OctreeSceneManager *>(mSceneManager)->getBoxes()->push_back(box);
}
//-----------------------------------------------------------------------
void OctreeHierarchyInterface::GetNodeGeometryList(GtpVisibility::HierarchyNode *node,  
                                                                                   GtpVisibility::GeometryList *geometryList, 
                                                                                   bool includeChildren)
{
        NodeList::const_iterator nodeIt, nodeIt_end;
        nodeIt_end = static_cast<Octree *>(node)->mNodes.end();

        for (nodeIt = static_cast<Octree *>(node)->mNodes.begin(); nodeIt != nodeIt_end; ++nodeIt)
        {
                SceneNodeHierarchyInterface::GetNodeGeometryList(*nodeIt, geometryList, includeChildren);
        }
}

} // namespace Ogre