source: GTP/trunk/Lib/Vis/OnlineCullingCHC/OGRE/src/OgreBvHierarchyInterface.cpp @ 1320

/*
-----------------------------------------------------------------------------
This source file is part of the GameTools Project
http://www.gametools.org

Author: Martin Szydlowski
-----------------------------------------------------------------------------
*/

#include "OgreBvhRenderable.h"
#include "OgreBvHierarchySceneManager.h"
#include "OgreBvHierarchyInterface.h"

namespace Ogre
{

BvHierarchyInterface::BvHierarchyInterface(BvHierarchySceneManager *sm, RenderSystem *rsys):
PlatformHierarchyInterface(sm, rsys)
{

}

bool BvHierarchyInterface::IsLeaf(GtpVisibility::HierarchyNode *node) const
{
        return BVHNODEPTR_CAST(node)->isLeaf();
}

void BvHierarchyInterface::TraverseNode(GtpVisibility::HierarchyNode *node)
{
        ++ mNumTraversedNodes;

        BvHierarchy::Node * kdnode = BVHNODEPTR_CAST(node);

        // if the node is a leaf and has geometry => render it
        if (kdnode->isLeaf())
        {
                if (!kdnode->isEmpty())
                {
                        RenderNode(node);
                }
        }
        else
        {
                if (kdnode->getLeftChild())
                        mDistanceQueue->push(kdnode->getLeftChild());
                if (kdnode->getRightChild())
                        mDistanceQueue->push(kdnode->getRightChild());
        }
}

void BvHierarchyInterface::RenderNode(GtpVisibility::HierarchyNode *node)
{
        BvHierarchy::Node * kdnode = BVHNODEPTR_CAST(node);
        if (kdnode->lastRendered() != mFrameId)
        {
                kdnode->setLastRendered(mFrameId);
                BvHierarchySceneManager * ksm = static_cast<BvHierarchySceneManager *>(mSceneManager);

                ksm->_renderNode(kdnode, mCamera, mOnlyShadowCasters, mLeavePassesInQueue);

                mVisibleNodes.push_back(node);
        }
}

void BvHierarchyInterface::PullUpVisibility(GtpVisibility::HierarchyNode *node) const
{
        BvHierarchy::Node * kdnode = BVHNODEPTR_CAST(node);

        while (kdnode && !kdnode->isNodeVisible())
        {
                kdnode->setNodeVisible(true);
                kdnode = kdnode->getParent();
        }
}

float BvHierarchyInterface::GetSquaredDistance(GtpVisibility::HierarchyNode *node) const
{
        const Vector3 pos = BVHNODEPTR_CAST(node)->mAABB.getCenter();
        return (mCameraPosition - pos).squaredLength();
}

AxisAlignedBox * BvHierarchyInterface::GetBoundingBox(GtpVisibility::HierarchyNode *node)
{
        // reuse box if node is the same
        // only create renderable bounding box for new node
        if (node != mSavedNode)
        {
                mSavedNode = node;
                mBox = BVHNODEPTR_CAST(node)->_getWorldAABB();
        }

        return &mBox;
}

bool BvHierarchyInterface::HasGeometry(GtpVisibility::HierarchyNode *node) const
{
        return BVHNODEPTR_CAST(node)->hasGeometry();
}

void BvHierarchyInterface::SetNodeVisible(GtpVisibility::HierarchyNode *node, const bool visible) const
{
        BVHNODEPTR_CAST(node)->setNodeVisible(visible);
}

bool BvHierarchyInterface::IsNodeVisible(GtpVisibility::HierarchyNode *node) const
{
        return BVHNODEPTR_CAST(node)->isNodeVisible();
}

void BvHierarchyInterface::SetLastVisited(GtpVisibility::HierarchyNode *node, const unsigned int frameId) const
{
        BVHNODEPTR_CAST(node)->setLastVisited(frameId);
}

unsigned int BvHierarchyInterface::LastVisited(GtpVisibility::HierarchyNode *node) const
{
        return BVHNODEPTR_CAST(node)->lastVisited();
}

void BvHierarchyInterface::VisualizeCulledNode(GtpVisibility::HierarchyNode *node, 
                                                                                                   GtpVisibility::CullingType type) const
{
        WireBoundingBox *box = BVHNODEPTR_CAST(node)->getWireBoundingBox();

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

        dynamic_cast<BvHierarchySceneManager *>(mSceneManager)->getRenderQueue()->addRenderable(box);
}

void BvHierarchyInterface::GetNodeGeometryList(GtpVisibility::HierarchyNode *node, 
                                                                                                   GtpVisibility::GeometryVector *geometryList, 
                                                                                                   bool includeChildren) 
{
        BVHNODEPTR_CAST(node)->getGeometryList(geometryList);
}

} // namespace Ogre