Source/System/NodeCores/Groups/Misc/OSGDistanceLOD.cpp

   1 /*---------------------------------------------------------------------------*\
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   5  *             Copyright (C) 2000-2002 by the OpenSG Forum                   *
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  29 /*---------------------------------------------------------------------------*\
  30  *                                Changes                                    *
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  37 \*---------------------------------------------------------------------------*/
  38
  39 #include <cstdlib>
  40 #include <cstdio>
  41
  42 #include "OSGConfig.h"
  43
  44 #include "OSGAction.h"
  45 #include "OSGCamera.h"
  46 #include "OSGRenderAction.h"
  47
  48 //just for debug
  49 #include <iostream>
  50 //just for debug
  51
  52 #include "OSGDistanceLOD.h"
  53
  54 OSG_USING_NAMESPACE
  55
  56 // Documentation for this class is emited in the
  57 // OSGDistanceLODBase.cpp file.
  58 // To modify it, please change the .fcd file (OSGDistanceLOD.fcd) and
  59 // regenerate the base file.
  60
  61 /*-------------------------------------------------------------------------*/
  62 /*                               Sync                                      */
  63
  64 void DistanceLOD::changed(ConstFieldMaskArg whichField,
  65                           UInt32            origin,
  66                           BitVector         details)
  67 {
  68     Inherited::changed(whichField, origin, details);
  69 }
  70
  71 /*-------------------------------------------------------------------------*/
  72 /*                               Dump                                      */
  73
  74 void DistanceLOD::dump(      UInt32    OSG_CHECK_ARG(uiIndent),
  75                        const BitVector OSG_CHECK_ARG(bvFlags )) const
  76 {
  77     SLOG << "Dump DistanceLOD NI" << std::endl;
  78 }
  79
  80 /*-------------------------------------------------------------------------*/
  81 /*                            Constructors                                 */
  82
  83 DistanceLOD::DistanceLOD(void) :
  84     Inherited()
  85 {
  86 }
  87
  88 DistanceLOD::DistanceLOD(const DistanceLOD &source) :
  89     Inherited(source)
  90 {
  91 }
  92
  93 /*-------------------------------------------------------------------------*/
  94 /*                             Destructor                                  */
  95
  96 DistanceLOD::~DistanceLOD(void)
  97 {
  98 }
  99
 100 /*-------------------------------------------------------------------------*/
 101 /*                               Init                                      */
 102
 103 void DistanceLOD::initMethod(InitPhase ePhase)
 104 {
 105     Inherited::initMethod(ePhase);
 106
 107     if(ePhase == TypeObject::SystemPost)
 108     {
 109         RenderAction::registerEnterDefault(
 110             DistanceLOD::getClassType(),
 111             reinterpret_cast<Action::Callback>(&DistanceLOD::renderEnter));
 112     }
 113 }
 114
 115 Action::ResultE DistanceLOD::renderEnter(Action *action)
 116 {
 117     action->useNodeList();
 118
 119     Int32 numLevels = action->getNNodes();
 120
 121     if(numLevels == 0)
 122         return Action::Continue;
 123
 124     RenderAction  *ra        = dynamic_cast<RenderAction *>(action);
 125     Int32          index     = 0;
 126
 127     const MFReal32 *range = getMFRange();
 128
 129     Int32 numRanges = range->size32();
 130
 131     if(numRanges == 0 || numLevels == 1)
 132     {
 133         index = 0;
 134     }
 135     else
 136     {
 137         Pnt3f eyepos;
 138
 139         ra->getActivePartition()->getCameraToWorld().mult(eyepos, eyepos);
 140
 141         Pnt3f objpos;
 142
 143         ra->topMatrix().mult(getCenter(), objpos);
 144
 145         Real32 dist = eyepos.dist(objpos);
 146
 147         if(numRanges >= numLevels && numLevels > 1)
 148             numRanges = numLevels - 1;
 149
 150         if(dist >= (*range)[numRanges - 1])
 151         {
 152             index = numRanges;
 153         }
 154         else
 155         {
 156             for(index = 0; index < numRanges; ++index)
 157             {
 158                 if(dist < (*range)[index])
 159                     break;
 160             }
 161         }
 162     }
 163
 164     Node *nodePtr = action->getNode(index);
 165
 166     if(ra->isVisible(nodePtr))
 167     {
 168         ra->addNode(nodePtr);
 169     }
 170
 171     return Action::Continue;
 172 }