Source/System/RenderingBackend/OSGDepthSortTreeBuilder.cpp

   1 /*---------------------------------------------------------------------------*\
   2  *                                OpenSG                                     *
   3  *                                                                           *
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   5  *                    Copyright (C) 2010 by the OpenSG Forum                 *
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   7  *                            www.opensg.org                                 *
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  15  * This library is free software; you can redistribute it and/or modify it   *
  16  * under the terms of the GNU Library General Public License as published    *
  17  * by the Free Software Foundation, version 2.                               *
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  19  * This library is distributed in the hope that it will be useful, but       *
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  22  * Library General Public License for more details.                          *
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  29 /*---------------------------------------------------------------------------*\
  30  *                                Changes                                    *
  31  *                                                                           *
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  37 \*---------------------------------------------------------------------------*/
  38
  39 #include "OSGDepthSortTreeBuilder.h"
  40 #include "OSGRenderActionBase.h"
  41 #include "OSGRenderPartition.h"
  42
  43 OSG_BEGIN_NAMESPACE
  44
  45 DepthSortTreeBuilder::DepthSortTreeBuilder(void) :
  46     Inherited()
  47 {
  48 }
  49
  50 DepthSortTreeBuilder::~DepthSortTreeBuilder(void)
  51 {
  52 }
  53
  54 void
  55 DepthSortTreeBuilder::add(RenderActionBase    *pAction,
  56                           RenderPartitionBase *pPart,
  57                           DrawFunctor         &drawFunc,
  58                           State               *pState,
  59                           StateOverride       *pStateOverride)
  60 {
  61     RenderPartition *pRPart = dynamic_cast<RenderPartition *>(pPart);
  62     RenderTreeNode  *pNode  = _pNodePool->create<RenderTreeNode>(_uiNodePoolIdx);
  63
  64     OSG::Node *pActNode = pAction->getActNode();
  65     Pnt3f      objPos;
  66
  67     pActNode->getVolume().getCenter(objPos);
  68
  69 #ifndef OSG_ENABLE_DOUBLE_MATRIX_STACK
  70     pRPart->getModelViewMatrix().mult(objPos, objPos);
  71     pRPart->getProjectionTrans().mult(objPos, objPos);
  72
  73     pNode->setScalar     (objPos[2]                 );
  74     pNode->setMatrixStore(pRPart->getMatrixStackTop());
  75 #else
  76     Pnt3d tmpPos(objPos[0], objPos[1], objPos[2]);
  77     pRPart->getModelViewMatrix().mult(tmpPos, tmpPos);
  78
  79     // convert back to Real32 (proj trans is only Matrix4f)
  80     objPos[0] = tmpPos[0];
  81     objPos[1] = tmpPos[1];
  82     objPos[2] = tmpPos[2];
  83     pRPart->getProjectionTrans().mult(objPos, objPos);
  84
  85     Matrix4f tmpMat;
  86     tmpMat.convertFrom(pRPart->getModelViewMatrix());
  87     MatrixStore tmpMS(pRPart->getMatrixStackTop().first, tmpMat);
  88
  89     pNode->setScalar     (objPos[2]);
  90     pNode->setMatrixStore(tmpMS    );
  91 #endif
  92
  93     pNode->setState        (pState                 );
  94     pNode->setStateOverride(pStateOverride         );
  95     pNode->setLightState   (pRPart->getLightState());
  96
  97     pNode->setNode   (pActNode);
  98     pNode->setFunctor(drawFunc);
  99
 100
 101     Inherited::addNode(pNode);
 102 }
 103
 104 OSG_END_NAMESPACE