Inventor/VRMLnodes/SoVRMLVertexLine.h

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/*=======================================================================
 * Copyright 1991-1996, Silicon Graphics, Inc.
 * ALL RIGHTS RESERVED
 *
 * UNPUBLISHED -- Rights reserved under the copyright laws of the United
 * States.   Use of a copyright notice is precautionary only and does not
 * imply publication or disclosure.
 *
 * U.S. GOVERNMENT RESTRICTED RIGHTS LEGEND:
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 * as set forth in FAR 52.227.19(c)(2) or subparagraph (c)(1)(ii) of the Rights
 * in Technical Data and Computer Software clause at DFARS 252.227-7013 and/or
 * in similar or successor clauses in the FAR, or the DOD or NASA FAR
 * Supplement.  Contractor/manufacturer is Silicon Graphics, Inc.,
 * 2011 N. Shoreline Blvd. Mountain View, CA 94039-7311.
 *
 * THE CONTENT OF THIS WORK CONTAINS CONFIDENTIAL AND PROPRIETARY
 * INFORMATION OF SILICON GRAPHICS, INC. ANY DUPLICATION, MODIFICATION,
 * DISTRIBUTION, OR DISCLOSURE IN ANY FORM, IN WHOLE, OR IN PART, IS STRICTLY
 * PROHIBITED WITHOUT THE PRIOR EXPRESS WRITTEN PERMISSION OF SILICON
 * GRAPHICS, INC.
**=======================================================================*/
/*=======================================================================
** Author      : Paul S. Strauss (MMM yyyy)
**=======================================================================*/
/*=======================================================================
 *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.),            ***
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/


#ifndef  _SO_VRMLVERTEX_LINE_
#define  _SO_VRMLVERTEX_LINE_

#include <Inventor/SbBasic.h>

#include <Inventor/fields/SoMFUInt32.h>
#include <Inventor/fields/SoSFNode.h>
#include <Inventor/fields/SoSFBool.h>

#include <Inventor/nodes/SoMaterialBinding.h>
#include <Inventor/nodes/SoTextureCoordinateBinding.h>
#include <Inventor/VRMLnodes/SoVRMLGeometry.h>
#include <Inventor/elements/SoShapeStyleElement.h>
#include <Inventor/elements/SoMaterialBindingElement.h>



#if defined(OIV_IGNORE_VRML_DEPRECATED)
  #include <SoDeprecationRules.h>
  #pragma push_macro("SoDEPRECATED_CLASS")
  #pragma push_macro("SoDEPRECATED_TYPEDEF")
  #undef SoDEPRECATED_CLASS
  #undef SoDEPRECATED_TYPEDEF
  #define SoDEPRECATED_CLASS(x,y)
  #define SoDEPRECATED_TYPEDEF(x,y)
#endif

#ifndef HIDDEN_FROM_DOC
class SoVRMLVertexLine;

typedef     SoDEPRECATED WINGDIAPI void APIENTRY SoVPCacheFunc(const char *const);

 SoVRMLLinePropertyCache {
 public:

  // API used by shapes:

  SbBool mightNeedSomethingFromState(const SoShapeStyleElement *sse) const
    { return needFromState & sse->getRenderCaseMask(); }

  void        fillInCache(SoNode *, SoNode *, SoNode *, 
                          const int32_t *, const int32_t *, 
                          SbBool ,  SoState *);

  int         getRenderCase(const SoShapeStyleElement *sse) const
    { return renderCase & sse->getRenderCaseMask(); }

  void        sendVertex(const char *vp) const
    { (*vertexFunc)(vp); }
  void        sendColor(const char *cp) const
    { (*colorFunc)(cp); }

  int         getNumVertices() const { return numVerts; }
  int         getNumColors() const { return numColors; }

  const char *getVertices(int i) const
    { return vertexPtr + vertexStride*i; }
  const char *getColors(int i) const
    { return colorPtr + colorStride*i; }

  SbBool colorIsInVtxProp() const {return colorIsInVP;}

  //Indicates if non-opaque transparency is in vertex property.
  SbBool transpIsInVtxProp() const {return transpIsInVP;}

  void setTranspIsInVP(SbBool flag){ transpIsInVP = flag;}

  int         getVertexStride() const { return vertexStride; }
  int         getColorStride() const { return colorStride; }


  SoMaterialBindingElement::Binding   getMaterialBinding()
    { return (SoMaterialBindingElement::Binding)materialBinding; }


  void        invalidate() { needFromState = ALL_FROM_STATE_BITS; }

  // Constructor.   Initializes everything.
  SoVRMLLinePropertyCache();

 public:

  // Tables of functions, data, and strides to increment through data.
  SoVPCacheFunc *vertexFunc;
  const char *vertexPtr;
  int vertexStride, numVerts;
  SoVPCacheFunc *colorFunc;
  const char *colorPtr;
  int colorStride, numColors;

  unsigned char needFromState;

  // 32 rendering cases.  Non-indexed shapes can get away with just
  // looking at the low 5 bits.  The bits are arranged like this:
  // 43210  BITS
  // -----  ----
  // 00...  Overall color
  // 01...  Part color
  // 10...  Face color
  // 11...  Vtx color
  // ..00.  Overall/No norm
  // ..01.  Part norm
  // ..10.  Face norm
  // ..11.  Vtx norm
  // ....?  Explicit exture coordinates needed
 private:
  enum {
    COLOR_BITS = 0x18,
    PART_COLOR = 0x8,
    FACE_COLOR = 0x10,
    VERTEX_COLOR = 0x18,

    NORMAL_BITS = 0x6,
    PART_NORMAL = 0x2,
    FACE_NORMAL = 0x4,
    VERTEX_NORMAL = 0x6,

    TEXCOORD_BIT = 0x1
  };
  // Bit-mask, set by ::fillInCache method
  // Bits use same as above, plus one for coords and one for
  // overrides (diffuse color, material binding, transparency)

  enum {
    OVERRIDE_FROM_STATE_BIT = 0x40,
    COORD_FROM_STATE_BIT = 0x20,
    COLOR_FROM_STATE_BITS = COLOR_BITS,
    NORMAL_FROM_STATE_BITS = NORMAL_BITS,
    TEXCOORD_FROM_STATE_BIT = TEXCOORD_BIT,
    ALL_FROM_STATE_BITS = 0x7F
  };
 private:

  //
  // VertexPropertyCache also stores whether or not colors, normals and
  // texture coordinates should be indexed.  Suggestion for writing
  // rendering loops:
  //
  // To minimize loop overhead, loop unrolling is a good idea.
  // Doing two iterations per loop makes it about 20% faster.  Doing
  // three iterations per loop makes it about 28% faster (only 8%
  // more than two iterations).
  //
  // On 200MHZ machines, an unrolled-by-3 loop can do close to 5
  // million iterations per second, assuming one call per iteration
  // (e.g. one-color, unlit polygons).
  //
  unsigned char materialBinding;
  unsigned char renderCase;
  unsigned char colorIsInVP;
  SbBool transpIsInVP;
};


#endif // HIDDEN_FROM_DOC
//
//  Class: SoVRMLVertexLine
//
//  Abstract vertex-based shape node class. All nodes derived from
//  this class are shapes that are constructed from vertices at some
//  or all of the current coordinates.  They all have vertexProperty nodes,
//  and vpCaches.
//

class SoState;
class SoVRMLLinePropertyCache;
class SoDEPRECATED  SoVRMLVertexLine : public SoVRMLGeometry {

  SO_NODE_ABSTRACT_HEADER(SoVRMLVertexLine);
    
 public:
  SoSFNode            coord;
  SoSFNode            color;
  SoSFBool            colorPerVertex;


 private:

  static void         initClass();
  static void         exitClass();
  virtual void        doAction(SoAction *action);
  virtual void        GLRender(SoGLRenderAction *action);
  virtual void        search(SoSearchAction *action);
  virtual void        getBoundingBox(SoGetBoundingBoxAction *action);
  virtual void        callback(SoCallbackAction *action);
  virtual void        pick(SoPickAction *action);

  virtual SoChildList *getChildren() const;

  virtual SbBool      validateNewFieldValue(SoField *pField,
                                            void *newValue);

  // Redefines this to invalidate normal cache
  virtual void        notify(SoNotList *list);

  // Copies the contents of the given node into this instance. The
  // default implementation copies just field values and the name.
  virtual void        copyContents(const SoFieldContainer *fromFC,
                                   SbBool copyConnections);

 private:
#if 0
    enum Binding {
    OVERALL =               SoMaterialBindingElement::OVERALL,
    PER_PART =              SoMaterialBindingElement::PER_PART,
    PER_PART_INDEXED =      SoMaterialBindingElement::PER_PART_INDEXED,
    PER_FACE =              SoMaterialBindingElement::PER_FACE,
    PER_FACE_INDEXED =      SoMaterialBindingElement::PER_FACE_INDEXED,
    PER_VERTEX =            SoMaterialBindingElement::PER_VERTEX,
    PER_VERTEX_INDEXED =    SoMaterialBindingElement::PER_VERTEX_INDEXED
  };
#endif
  // Constructor - makes this abstract
  SoVRMLVertexLine();

  virtual ~SoVRMLVertexLine();
    
  // Returns TRUE if the shape should be rendered. 
  // Checks for transparency in vertexProperty node before invoking
  // render action.
  virtual SbBool      shouldGLRender(SoGLRenderAction *action,
                                     SbBool isPointsOrLines);

  // vpCache stores information from one render to the next about
  // what information needs to be grabbed from the state, etc.
  SoVRMLLinePropertyCache     vpCache;

  // Hack to make paths work for VRML nodes that contain other nodes
  // in their fields...  Nov-96
  SoChildList *children;
  friend class SoPath;    // Need to access "children" in SoPath::truncate()

  // Mutex to protect access to the vpCache
  SbThreadRWMutex *vpCacheMutex;

 private:
  void rebuildChildrenList();

 private:
  SoMFUInt32  orderedrgba;
  unsigned char materialBinding;

};



#if defined(OIV_IGNORE_VRML_DEPRECATED)
  #pragma pop_macro("SoDEPRECATED_TYPEDEF")
  #pragma pop_macro("SoDEPRECATED_CLASS")
#endif

#endif /* _SO_VRMLVERTEX_LINE_ */

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Open Inventor Toolkit reference manual, generated on 12 Feb 2024
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