SoText3.h

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/*
 *
 *  Copyright (C) 2000 Silicon Graphics, Inc.  All Rights Reserved. 
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  Further, this software is distributed without any warranty that it is
 *  free of the rightful claim of any third person regarding infringement
 *  or the like.  Any license provided herein, whether implied or
 *  otherwise, applies only to this software file.  Patent licenses, if
 *  any, provided herein do not apply to combinations of this program with
 *  other software, or any other product whatsoever.
 * 
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 *  Mountain View, CA  94043, or:
 * 
 *  http://www.sgi.com 
 * 
 *  For further information regarding this notice, see: 
 * 
 *  http://oss.sgi.com/projects/GenInfo/NoticeExplan/
 *
 */
 
 
/*
 * Copyright (C) 1990,91   Silicon Graphics, Inc.
 *
 _______________________________________________________________________
 ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
 |
 |   $Revision: 1.1.1.1 $
 |
 |   Description:
 |      This file defines the SoText3 node class.
 |
 |   Author(s)          : Gavin Bell
 |
 ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
 _______________________________________________________________________
 */
 
#ifndef  _SO_TEXT_3_
#define  _SO_TEXT_3_
 
#include <Inventor/SbBox.h>
#include <Inventor/fields/SoMFString.h>
#include <Inventor/fields/SoSFEnum.h>
#include <Inventor/fields/SoSFBitMask.h>
#include <Inventor/fields/SoSFFloat.h>
#include <Inventor/nodes/SoShape.h>
 
#include <Inventor/system/SbOpenGL.h>   // For GLenum declaration
 
 
#ifndef gluTESSELATOR
#define gluTESSELATOR  GLUtriangulatorObj
#if defined(__glu_h__) && defined(GLU_VERSION_1_2)
#define gluTESSELATOR  GLUtesselator
#else
extern "C" struct GLUtriangulatorObj;
#endif
#endif
 
 
 
class SoOutlineFontCache;
class SoPrimitiveVertex;
class SoTextureCoordinateElement;
 
 
 
class INVENTOR_API SoText3 : public SoShape {
 
    SO_NODE_HEADER(SoText3);
 
  public:
    enum Justification {
        LEFT    = 0x01,
        RIGHT   = 0x02,
        CENTER  = 0x03
    };
 
    enum Part {
        FRONT   = 0x01,
        SIDES   = 0x02,
        BACK    = 0x04,
        ALL     = 0x07
    };
 
 
 
    SoMFString          string;         
 
    SoSFFloat           spacing;        
 
    SoSFBitMask         parts;          
 
    SoSFEnum            justification;
 
 
    SoText3();
 
  SoEXTENDER public:
 
    SbBox3f             getCharacterBounds(SoState *state,
                                int stringIndex, int charIndex);
 
    virtual void        GLRender(SoGLRenderAction *action);
    virtual void        rayPick(SoRayPickAction *action);
 
  SoINTERNAL public:
    static void         initClass();
 
  protected:
    virtual void        computeBBox(SoAction *action, SbBox3f &box,
                                    SbVec3f &center);
 
    virtual void        generatePrimitives(SoAction *);
    
    virtual ~SoText3();
 
  private:
    bool setupFontCache(SoState *state, bool forRender = FALSE);
 
    void getFrontBBox(SbBox2f &result);
 
    SbVec2f getStringOffset(int line);
    
    SbVec2f getCharacterOffset(int line, int whichChar);
 
    void renderFront(SoGLRenderAction *action, int line,
                     GLUtriangulatorObj *tobj);
    
    void renderSide(SoGLRenderAction *action, int line);
 
    SoDetail * createTriangleDetail(SoRayPickAction *,
                                    const SoPrimitiveVertex *,
                                    const SoPrimitiveVertex *,
                                    const SoPrimitiveVertex *,
                                    SoPickedPoint *);
 
    void generateFront(int line);
    
    void generateSide(int line);
 
    static void generateSideTris(int nPoints, const SbVec3f *p1,
                const SbVec3f *n1, const SbVec3f *p2,
                const SbVec3f *n2, const float *sTexCoords,
                const float *tTexCoords);
    static void renderSideTris(int nPoints, const SbVec3f *p1,
                const SbVec3f *n1, const SbVec3f *p2,
                const SbVec3f *n2, const float *sTexCoords,
                const float *tTexCoords);
 
    static void CALLBACK beginCB(GLenum primType);
    static void CALLBACK endCB();
    static void CALLBACK vtxCB(void *vertex);
    
    SoOutlineFontCache *myFont;
 
    static SoText3 *currentGeneratingNode;
    static SoPrimitiveVertex *genPrimVerts[3];
    static SbVec3f genTranslate;
    static int genWhichVertex;
    static uint32_t genPrimType;
    static SoAction *genAction;
    static bool genBack;
    static bool genTexCoord;
    static const SoTextureCoordinateElement *tce;
};
 
#endif /* _SO_TEXT_3_ */