Source/System/GraphOp/OSGStripeGraphOp.cpp

   1 /*---------------------------------------------------------------------------*\
   2  *                                OpenSG                                     *
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   5  *             Copyright (C) 2000-2002 by the OpenSG Forum                   *
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  28 \*---------------------------------------------------------------------------*/
  29 /*---------------------------------------------------------------------------*\
  30  *                                Changes                                    *
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  37 \*---------------------------------------------------------------------------*/
  38
  39
  40 /***************************************************************************\
  41 *                             Includes                                    *
  42 \***************************************************************************/
  43
  44 #include "OSGStripeGraphOp.h"
  45 #include "OSGTypedGeoIntegralProperty.h"
  46 #include "OSGGeoFunctions.h"
  47 #include "OSGGraphOpFactory.h"
  48
  49 OSG_USING_NAMESPACE
  50
  51 /***************************************************************************\
  52  *                            Description                                  *
  53 \***************************************************************************/
  54
  55 /*! \class OSG::StripeGraphOp
  56     \ingroup GrpSystemNodeCoresDrawablesGeometry
  57
  58 A base class used to traverse geometries.
  59
  60 */
  61
  62 namespace
  63 {
  64     //! Register the GraphOp with the factory
  65     static bool registerOp(void)
  66     {
  67         GraphOpRefPtr newOp = StripeGraphOp::create();
  68
  69         GraphOpFactory::the()->registerOp(newOp);
  70         return true;
  71     }
  72
  73     static OSG::StaticInitFuncWrapper registerOpWrapper(registerOp);
  74
  75 } // namespace
  76
  77
  78 /***************************************************************************\
  79  *                           Instance methods                              *
  80 \***************************************************************************/
  81
  82 /*-------------------------------------------------------------------------*\
  83  -  public                                                                 -
  84 \*-------------------------------------------------------------------------*/
  85
  86
  87 /*------------- constructors & destructors --------------------------------*/
  88
  89 StripeGraphOp::StripeGraphOp(const char* name) :
  90     Inherited(name),
  91     _force      (false),
  92     _stitch     (false),
  93     _singleIndex(false)
  94 {
  95 }
  96
  97 StripeGraphOp::~StripeGraphOp(void)
  98 {
  99 }
 100
 101 StripeGraphOpTransitPtr
 102 StripeGraphOp::create(void)
 103 {
 104     return StripeGraphOpTransitPtr(new StripeGraphOp);
 105 }
 106
 107 GraphOpTransitPtr StripeGraphOp::clone(void)
 108 {
 109     return GraphOpTransitPtr(new StripeGraphOp);
 110 }
 111
 112 void StripeGraphOp::setParams(const std::string params)
 113 {
 114     ParamSet ps(params);
 115
 116     ps("force",       _force);
 117     ps("stitch",      _stitch);
 118     ps("singleindex", _singleIndex);
 119
 120     std::string out = ps.getUnusedParams();
 121     if(out.length())
 122     {
 123         FWARNING(("StripeGraphOp doesn't have parameters '%s'\n.",
 124                 out.c_str()));
 125     }
 126 }
 127
 128 std::string StripeGraphOp::usage(void)
 129 {
 130     return
 131     "Stripe: Stripe Geometries\n"
 132     "Params: name (type, default)\n"
 133     "  force       (bool, false): force striping even if already striped\n"
 134     "  stitch      (bool, false): stitch strips using degenerate triangles\n"
 135     "  singleIndex (bool, false): create single index before striping\n";
 136 }
 137
 138 bool StripeGraphOp::travNodeEnter(Node *node)
 139 {
 140     Geometry *geo = dynamic_cast<Geometry *>(node->getCore());
 141
 142     if(geo != NULL)
 143     {
 144         // Check if it's striped already
 145         if (!_force)
 146         {
 147             GeoIntegralProperty *t = geo->getTypes();
 148
 149             if(t != NULL)
 150             {
 151                 bool gotNonTriangles = false;
 152                 bool gotTriStrips    = false;
 153
 154                 for(UInt32 i = 0; i < t->size(); ++i)
 155                 {
 156                     switch(t->getValue(i))
 157                     {
 158                         case GL_TRIANGLE_STRIP:
 159                         case GL_TRIANGLE_FAN:
 160                             gotTriStrips = true;
 161                             break;
 162
 163                         case GL_QUADS:
 164                         case GL_QUAD_STRIP:
 165                         case GL_POLYGON:
 166                             gotNonTriangles = true;
 167                             break;
 168
 169                         default:
 170                             break;
 171                     }
 172
 173                     if(gotNonTriangles == true)
 174                         break;
 175                 }
 176
 177                 if(gotNonTriangles == false &&
 178                    gotTriStrips    == true   )
 179                 {
 180                     return true;
 181                 }
 182             }
 183         }
 184
 185         createSharedIndex(geo);
 186
 187         if(_singleIndex == true)
 188         {
 189             createSingleIndex(geo);
 190         }
 191
 192         createOptimizedPrimitives(geo, 1, true, true, 16, false, _stitch);
 193     }
 194
 195     return true;
 196 }
 197
 198 bool StripeGraphOp::travNodeLeave(Node *)
 199 {
 200     return true;
 201 }
 202
 203 /*-------------------------------------------------------------------------*\
 204  -  protected                                                              -
 205 \*-------------------------------------------------------------------------*/