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 * modification, are permitted provided that the following conditions are
 * met:
 * 
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 * this list of conditions and the following disclaimer.
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 * contributors may be used to endorse or promote products derived from
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/*!
  \class SoText3 SoText3.h Inventor/nodes/SoText3.h
  \brief The SoText3 class renders extruded 3D text.
  \ingroup nodes

  Render text as 3D geometry.

  The size of the textual geometry representation is decided from the
  SoFont::size field of a preceding SoFont-node in the scene graph,
  which specifies the size in unit coordinates. This value sets the
  approximate vertical size of the letters.  The default value if no
  SoFont-nodes are used, is 10.

  This node will create 3D geometry from a specified font defined by a
  preceding SoFont node. The complexity of the glyphs is controlled by
  a preceding SoComplexity node with \e Type set to OBJECT_SPACE.
  Please note that the default builtin 3D font will not be affected by
  the SoComplexity node.

  This is a simple example of an extruded SoText3 string:

  \verbatim
   #Inventor V2.1 ascii

   Separator {
     renderCaching ON
     Font {
        name "Arial"
        size 2
     }
     ProfileCoordinate2 {
       point [ 0 0,
               0.05 0.05,
               0.25 0.05,
               0.3 0 ]
     }
     LinearProfile {
       index [ 0, 1, 2, 3 ]
     }
     Complexity {
       type OBJECT_SPACE
       value 1
     }
     ShapeHints {
       creaseAngle 1.5
       shapeType SOLID
       vertexOrdering COUNTERCLOCKWISE
     }
     Material {
       diffuseColor 0.6 0.6 0.8
       specularColor 1 1 1
     }
     Text3 {
       string ["Coin3D"]
       parts ALL
     }
   }
  \endverbatim

  <center>
  <img src="http://doc.coin3d.org/images/Coin/nodes/text3.png">
  </center>


  if SoText3::Part is set to SIDES or ALL and no profile is provided, a
  flat, one unit long profile will be created.

  Separate colors can be assigned to the front, sides and back of the
  glyphs by adding a preceding SoMaterialBinding node.  Set the \e value
  field to PER_PART (default is OVERALL). The front, side and back of
  the glyphs will then be colored according to diffuse color 0, 1 and 2
  found on the stack.

  Beware that using a lot of SoText3 text characters in a scene will
  usually have severe impact on the rendering performance, as each and
  every character of the text increases the polygon-count a lot. This
  makes SoText3 nodes most suitable in situations where you just need
  a few characters to be placed in your scene, rather than to
  visualize complete sentences.

  <b>FILE FORMAT/DEFAULTS:</b>
  \code
    Text3 {
        string ""
        spacing 1
        justification LEFT
        parts FRONT
    }
  \endcode

  \sa SoText2, SoAsciiText, SoProfile
*/

// *************************************************************************

#include <Inventor/nodes/SoText3.h>

#include <string.h>
#include <float.h> // FLT_MAX, FLT_MIN

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif // HAVE_CONFIG_H

#include <Inventor/SoPrimitiveVertex.h>
#include <Inventor/actions/SoGLRenderAction.h>
#include <Inventor/actions/SoGetPrimitiveCountAction.h>
#include <Inventor/bundles/SoMaterialBundle.h>
#include <Inventor/details/SoTextDetail.h>
#include <Inventor/elements/SoFontNameElement.h>
#include <Inventor/elements/SoFontSizeElement.h>
#include <Inventor/elements/SoGLShapeHintsElement.h>
#include <Inventor/elements/SoMaterialBindingElement.h>
#include <Inventor/elements/SoLazyElement.h>
#include <Inventor/elements/SoGLCacheContextElement.h>
#include <Inventor/elements/SoComplexityTypeElement.h>
#include <Inventor/elements/SoComplexityElement.h>
#include <Inventor/elements/SoCreaseAngleElement.h>
#include <Inventor/elements/SoGLMultiTextureEnabledElement.h>
#include <Inventor/elements/SoTextOutlineEnabledElement.h>
#include <Inventor/misc/SoState.h>
#include <Inventor/misc/SoNormalGenerator.h>
#include <Inventor/nodes/SoProfile.h>
#include <Inventor/nodes/SoNurbsProfile.h>
#include <Inventor/SbLine.h>
#include <Inventor/SbBox2f.h>
#include <Inventor/lists/SbList.h>
#include <Inventor/elements/SoCacheElement.h>
#include <Inventor/system/gl.h>

#ifdef COIN_THREADSAFE
#include <Inventor/threads/SbMutex.h>
#endif // COIN_THREADSAFE

#if COIN_DEBUG
#include <Inventor/errors/SoDebugError.h>
#endif // COIN_DEBUG

#include "coindefs.h" // COIN_OBSOLETED()
#include "nodes/SoSubNodeP.h"
#include "fonts/glyph3d.h"
#include "caches/SoGlyphCache.h"

// *************************************************************************

/*!
  \enum SoText3::Part
  Used to specify which parts should be rendered/generated.
*/
/*!
  \var SoText3::Part SoText3::FRONT
  Front of characters.
*/
/*!
  \var SoText3::Part SoText3::SIDES
  Sides of characters.
*/
/*!
  \var SoText3::Part SoText3::BACK
  Back of characters.
*/
/*!
  \var SoText3::Part SoText3::ALL
  All parts.
*/

/*!
  \enum SoText3::Justification
  Used to specify horizontal string alignment.
*/
/*!
  \var SoText3::Justification SoText3::LEFT
  Left edges of strings are aligned.
*/
/*!
  \var SoText3::Justification SoText3::RIGHT
  Right edges of strings are aligned.
*/
/*!
  \var SoText3::Justification SoText3::CENTER
  Strings are centered.
*/


/*!
  \var SoMFString SoText3::string

  The strings to render.

  Array defaults to contain a single empty string.
*/
/*!
  \var SoSFFloat SoText3::spacing
  Vertical spacing. 1.0 is the default spacing.
*/
/*!
  \var SoSFEnum SoText3::justification
  Horizontal justification. Default is alignment at the left border.
*/
/*!
  \var SoSFBitMask SoText3::parts
  Character parts. Default is to show only the front-facing part.
*/

// FIXME: missing features, pederb 20000224
//   - Texture coordinates are not generated yet.
//   - Normals for SIDES should be smoothed.

// *************************************************************************

class SoText3P {
public:
  SoText3P(SoText3 * master) : master(master) { }

  void render(SoState * state, const cc_font_specification * fontspec, unsigned int part);
  void generate(SoAction * action, const cc_font_specification * fontspec, unsigned int part);

  SbList <float> widths;
  void setUpGlyphs(SoState * state, SoText3 * textnode);
  SbBox3f maxglyphbbox;
  SoNormalGenerator * normalgenerator;

  SoGlyphCache * cache;

  void lock(void) {
#ifdef COIN_THREADSAFE
    this->mutex.lock();
#endif // COIN_THREADSAFE
  }
  void unlock(void) {
#ifdef COIN_THREADSAFE
    this->mutex.unlock();
#endif // COIN_THREADSAFE
  }
private:
#ifdef COIN_THREADSAFE
  // FIXME: a mutex for every instance seems a bit excessive,
  // especially since MSWindows might have rather strict limits on the
  // total amount of mutex resources a process (or even a user) can
  // allocate. so consider making this a class-wide instance instead.
  // -mortene.
  SbMutex mutex;
#endif // COIN_THREADSAFE
  SoText3 * master;
};

#define PRIVATE(p) ((p)->pimpl)
#define PUBLIC(p) ((p)->master)

// *************************************************************************

SO_NODE_SOURCE(SoText3);

// *************************************************************************

SoText3::SoText3(void)
{
  SO_NODE_INTERNAL_CONSTRUCTOR(SoText3);

  SO_NODE_ADD_FIELD(string, (""));
  SO_NODE_ADD_FIELD(spacing, (1.0f));
  SO_NODE_ADD_FIELD(justification, (SoText3::LEFT));
  SO_NODE_ADD_FIELD(parts, (SoText3::FRONT));

  SO_NODE_DEFINE_ENUM_VALUE(Justification, LEFT);
  SO_NODE_DEFINE_ENUM_VALUE(Justification, RIGHT);
  SO_NODE_DEFINE_ENUM_VALUE(Justification, CENTER);
  SO_NODE_SET_SF_ENUM_TYPE(justification, Justification);

  SO_NODE_DEFINE_ENUM_VALUE(Part, FRONT);
  SO_NODE_DEFINE_ENUM_VALUE(Part, SIDES);
  SO_NODE_DEFINE_ENUM_VALUE(Part, BACK);
  SO_NODE_DEFINE_ENUM_VALUE(Part, ALL);
  SO_NODE_SET_SF_ENUM_TYPE(parts, Part);

  PRIVATE(this) = new SoText3P(this);
  PRIVATE(this)->normalgenerator = new SoNormalGenerator(FALSE, 0xff);
  PRIVATE(this)->cache = NULL;
}

SoText3::~SoText3()
{
  if (PRIVATE(this)->cache) PRIVATE(this)->cache->unref();
  delete PRIVATE(this)->normalgenerator;
  delete PRIVATE(this);
}

// doc in parent
void
SoText3::initClass(void)
{
  SO_NODE_INTERNAL_INIT_CLASS(SoText3, SO_FROM_INVENTOR_2_1);
}

// doc in parent
void
SoText3::computeBBox(SoAction * action, SbBox3f & box, SbVec3f & center)
{
  SoState * state = action->getState();

  PRIVATE(this)->lock();
  PRIVATE(this)->setUpGlyphs(state, this);
  SoCacheElement::addCacheDependency(state, PRIVATE(this)->cache);

  const cc_font_specification * fontspec = PRIVATE(this)->cache->getCachedFontspec();

  int i, n = PRIVATE(this)->widths.getLength();
  if (n == 0) {
    PRIVATE(this)->unlock();
    return; // empty bbox
  }
  float maxw = FLT_MIN;
  for (i = 0; i < n; i++) {
    maxw = SbMax(maxw, PRIVATE(this)->widths[i]);
  }

  if (maxw == FLT_MIN) { // There is no text to bound. Returning.
    PRIVATE(this)->unlock();
    return;
  }

  SbBox2f maxbox;

  const float maxy = 0;
  float miny = -this->spacing.getValue() * fontspec->size * (n-1);

  float minx, maxx;
  switch (this->justification.getValue()) {
  case SoText3::LEFT:
    minx = 0.0f;
    maxx = maxw;
    break;
  case SoText3::RIGHT:
    minx = -maxw;
    maxx = 0.0f;
    break;
  case SoText3::CENTER:
    maxx = maxw * 0.5f;
    minx = -maxx;
    break;
  default:
    assert(0 && "unknown justification");
    minx = maxx = 0.0f;
    break;
  }

  // check profiles and extend bounding box if necessary
  float profsize = 0;
  float minz = -1.0f, maxz = 0.0f;

  const SoNodeList profilenodes = SoProfileElement::get(state);
  int numprofiles = profilenodes.getLength();
  if ( numprofiles > 0) {
    assert(profilenodes[0]->getTypeId().isDerivedFrom(SoProfile::getClassTypeId()));
    for (int i = numprofiles-1; i >= 0; i--) {
      SoProfile *pn = (SoProfile *)profilenodes[i];
      if (pn->isOfType(SoNurbsProfile::getClassTypeId())) {
        // Don't use SoProfile::getVertices() for SoNurbsProfile
        // nodes as this would cause a call to the GLU library, which
        // requires a valid GL context. Instead we approximate using
        // SoNurbsProfile::getTrimCurve(), and use the control points
        // to calculate the bounding box. This is an approximation,
        // but the same technique is used in So[Indexed]NurbsSurface
        // and So[Indexed]NurbsCurve. To avoid this approximation we
        // would need our own NURBS library.    pederb, 20000926
        SoNurbsProfile * np = (SoNurbsProfile*) pn;
        float * knots;
        int32_t numknots;
        int dim;
        int32_t numpts;
        float * points;
        np->getTrimCurve(state, numpts, points, dim,
                         numknots, knots);
        for (int j = 0; j < numpts; j++) {
          if (-points[j*dim] > maxz) maxz = -points[j*dim];
          if (-points[j*dim] < minz) minz = -points[j*dim];
          if (points[j*dim+1] > profsize) profsize = points[j*dim+1];
        }
      }
      else {
        int32_t num;
        SbVec2f *coords;
        pn->getVertices(state, num, coords);
        for (int j = 0; j < num; j++) {
          if (-coords[j][0] > maxz) maxz = -coords[j][0];
          if (-coords[j][0] < minz) minz = -coords[j][0];
          if (coords[j][1] > profsize) profsize = coords[j][1];
        }
      }
    }
  }
  else {
    // extrude
    if (this->parts.getValue() == SoText3::BACK) {
      maxz = -1.0f;
    }
    else if (this->parts.getValue() == SoText3::FRONT) {
      minz = 0.0f;
    }
  }

  box.setBounds(SbVec3f(minx, miny, minz), SbVec3f(maxx, maxy, maxz));

  // Expanding bbox so that glyphs like 'j's and 'q's are completely inside.
  box.extendBy(SbVec3f(0,PRIVATE(this)->maxglyphbbox.getMin()[1] - (n-1) * fontspec->size, 0));
  box.extendBy(PRIVATE(this)->maxglyphbbox);

  box.extendBy(SbVec3f(box.getMax()[0] + profsize, box.getMax()[1] + profsize, 0));
  box.extendBy(SbVec3f(box.getMin()[0] - profsize, box.getMin()[1] - profsize, 0));

  center = box.getCenter();
  PRIVATE(this)->unlock();
}


/*!
  Not implemented. Should probably have been private in OIV. Let us
  know if you need this method for anything, and we'll implement it.
*/
SbBox3f
SoText3::getCharacterBounds(SoState * COIN_UNUSED_ARG(state), int COIN_UNUSED_ARG(stringindex), int COIN_UNUSED_ARG(charindex))
{
  COIN_OBSOLETED();
  return SbBox3f();
}

// doc in parent
void
SoText3::GLRender(SoGLRenderAction * action)
{
  if (!this->shouldGLRender(action))
    return;

  PRIVATE(this)->lock();

  SoState * state = action->getState();

  // FIXME: implement this feature. 20040820 mortene.
  static SbBool warned = FALSE;
  if (!warned) {
    const int stackidx = SoTextOutlineEnabledElement::getClassStackIndex();
    const SbBool outlinepresence = state->isElementEnabled(stackidx);

    if (outlinepresence && SoTextOutlineEnabledElement::get(state)) {
#if COIN_DEBUG
      SoDebugError::postWarning("SoText3::GLRender",
                                "Support for rendering SoText3 nodes in outline "
                                "(i.e. heeding the SoTextOutlineEnabledElement) "
                                "not yet implemented.");
#endif // COIN_DEBUG
      warned = TRUE;
    }
  }


  PRIVATE(this)->setUpGlyphs(state, this);
  SoCacheElement::addCacheDependency(state, PRIVATE(this)->cache);

  const cc_font_specification * fontspec = PRIVATE(this)->cache->getCachedFontspec();

  SoMaterialBindingElement::Binding binding = SoMaterialBindingElement::get(state);
  SoMaterialBundle mb(action);
  mb.sendFirst();

  const unsigned int prts = this->parts.getValue();
  SoLazyElement * lazyelement = SoLazyElement::getInstance(state);
  const int numdiffuse = lazyelement->getNumDiffuse();

  SbBool matperpart = (binding != SoMaterialBindingElement::OVERALL);

  if (prts & SoText3::FRONT) {
    PRIVATE(this)->render(state, fontspec, SoText3::FRONT);
  }
  if (prts & SoText3::SIDES) {
    if (matperpart && (numdiffuse > 1))
        mb.send(1, FALSE);
    PRIVATE(this)->render(state, fontspec, SoText3::SIDES);
  }
  if (prts & SoText3::BACK) {
    if (matperpart && (numdiffuse > 2))
      mb.send(2, FALSE);
    PRIVATE(this)->render(state, fontspec, SoText3::BACK);
  }

  if (SoComplexityTypeElement::get(state) == SoComplexityTypeElement::OBJECT_SPACE) {
    SoGLCacheContextElement::shouldAutoCache(state, SoGLCacheContextElement::DO_AUTO_CACHE);
    SoGLCacheContextElement::incNumShapes(state);
  }
  PRIVATE(this)->unlock();
}

// doc in parent
void
SoText3::getPrimitiveCount(SoGetPrimitiveCountAction * action)
{
  if (action->is3DTextCountedAsTriangles()) {
    // will cause a call to generatePrimitives()
    // slow, but we can't be bothered to implement a new loop to count triangles
    inherited::getPrimitiveCount(action);
  }
  else {
    action->addNumText(this->string.getNum());
  }
}

// doc in parent
void
SoText3::generatePrimitives(SoAction * action)
{
  SoState * state = action->getState();

  PRIVATE(this)->lock();
  PRIVATE(this)->setUpGlyphs(state, this);
  
  if (PRIVATE(this)->cache) {
    const cc_font_specification * fontspec = PRIVATE(this)->cache->getCachedFontspec();
    unsigned int prts = this->parts.getValue();
    
    if (prts & SoText3::FRONT) {
      PRIVATE(this)->generate(action, fontspec, SoText3::FRONT);
    }
    if (prts & SoText3::SIDES) {
      PRIVATE(this)->generate(action, fontspec, SoText3::SIDES);
    }
    if (prts & SoText3::BACK) {
      PRIVATE(this)->generate(action, fontspec, SoText3::BACK);
    }
  }
  PRIVATE(this)->unlock();
}

// doc in parent
SoDetail *
SoText3::createTriangleDetail(SoRayPickAction * COIN_UNUSED_ARG(action),
                              const SoPrimitiveVertex * v1,
                              const SoPrimitiveVertex * COIN_UNUSED_ARG(v2),
                              const SoPrimitiveVertex * COIN_UNUSED_ARG(v3),
                              SoPickedPoint * COIN_UNUSED_ARG(pp))
{
  // generatePrimitives() places text details inside each primitive vertex
  assert(v1->getDetail());
  return v1->getDetail()->copy();
}

void
SoText3P::render(SoState * state, const cc_font_specification * fontspec,
                 unsigned int part)
{
  int i, n = this->widths.getLength();

  int firstprofile = -1;
  int32_t profnum;
  SbVec2f *profcoords;
  float nearz =  FLT_MAX;
  float farz  = -FLT_MAX;

  float creaseangle = SoCreaseAngleElement::get(state);

  SbBool do2Dtextures = FALSE;
  SbBool do3Dtextures = FALSE;
  if (SoGLMultiTextureEnabledElement::get(state, 0)) {
    do2Dtextures = TRUE;
    if (SoGLMultiTextureEnabledElement::getMode(state, 0) ==
        SoMultiTextureEnabledElement::TEXTURE3D) {
      do3Dtextures = TRUE;
    }
  }
  // FIXME: implement proper support for 3D-texturing, and get rid of
  // this. (20031010 handegar)
  if (do3Dtextures) {
    static SbBool first = TRUE;
    if (first) {
      first = FALSE;
#if COIN_DEBUG
      SoDebugError::postWarning("SoText3::GLRender",
                                "3D-textures not supported for this node type yet.");
#endif // COIN_DEBUG
    }
  }


  const SoNodeList & profilenodes = SoProfileElement::get(state);
  int numprofiles = profilenodes.getLength();
  // Indicates if a valid profile has been specified. If it has not,
  // text will be rendered extruded.
  SbBool validprofile = FALSE;

  if (numprofiles > 0) {
    assert(profilenodes[0]->getTypeId().isDerivedFrom(SoProfile::getClassTypeId()));
    // Find near/far z (for modifying position of front/back)

    for (int l=numprofiles-1; l>=0; l--) {
      SoProfile * pn = (SoProfile *) profilenodes[l];
      pn->getVertices(state, profnum, profcoords);

      if (profnum > 0) {
        if (profcoords[profnum-1][0] > farz) farz = profcoords[profnum-1][0];
        if (profcoords[0][0] < nearz) nearz = profcoords[0][0];
        if (pn->linkage.getValue() == SoProfile::START_FIRST) {
          if (firstprofile == -1) {
            firstprofile = l;
            validprofile = TRUE;
          }
          break;
        }
      }
    }
    nearz = -nearz;
    farz = -farz;
  }

  // If no profiles have been specified, or if no valid coordinates have
  // been given, set near and far / front and back values to default.
  if (!validprofile) {
    nearz = 0.0;
    farz = -1.0;
  }

  float ypos = 0.0f;
  for (i = 0; i < n; i++) {

    float xpos = 0.0f;
    switch (PUBLIC(this)->justification.getValue()) {
    case SoText3::RIGHT:
      xpos = -this->widths[i];
      break;
    case SoText3::CENTER:
      xpos = - this->widths[i] * 0.5f;
      break;
    }

    SbString str = PUBLIC(this)->string[i];
    cc_glyph3d * prevglyph = NULL;
    const char * p = str.getString();
    size_t length = cc_string_utf8_validate_length(p);
    assert(length);

    for (unsigned int strcharidx = 0; strcharidx < length; strcharidx++) {
      uint32_t glyphidx = 0;

      glyphidx = cc_string_utf8_get_char(p);
      p = cc_string_utf8_next_char(p);

      cc_glyph3d * glyph = cc_glyph3d_ref(glyphidx, fontspec);
      const SbVec2f * coords = (SbVec2f *) cc_glyph3d_getcoords(glyph);

      // Get kerning
      if (strcharidx > 0) {
        float kerningx, kerningy;
        cc_glyph3d_getkerning(prevglyph, glyph, &kerningx, &kerningy);
        xpos += kerningx * fontspec->size;
      }
      if (prevglyph) {
        cc_glyph3d_unref(prevglyph);
      }
      prevglyph = glyph;

      if (part != SoText3::SIDES) {  // FRONT & BACK
        const int * ptr = cc_glyph3d_getfaceindices(glyph);
        glBegin(GL_TRIANGLES);

        while (*ptr >= 0) {
          SbVec2f v0, v1, v2;
          float zval;
          if (part == SoText3::FRONT) {
            glNormal3f(0.0f, 0.0f, 1.0f);
            v2 = coords[*ptr++];
            v1 = coords[*ptr++];
            v0 = coords[*ptr++];
            zval = nearz;
          }
          else {  // BACK
            glNormal3f(0.0f, 0.0f, -1.0f);
            v0 = coords[*ptr++];
            v1 = coords[*ptr++];
            v2 = coords[*ptr++];
            zval = farz;
          }
          if(do2Dtextures)
            glTexCoord2f(v0[0] + xpos/fontspec->size,
                         v0[1] + ypos/fontspec->size);
          glVertex3f(v0[0] * fontspec->size + xpos, v0[1] * fontspec->size + ypos, zval);
          if(do2Dtextures)
            glTexCoord2f(v1[0] + xpos/fontspec->size,
                         v1[1] + ypos/fontspec->size);
          glVertex3f(v1[0] * fontspec->size + xpos, v1[1] * fontspec->size + ypos, zval);
          if(do2Dtextures)
            glTexCoord2f(v2[0] + xpos/fontspec->size,
                         v2[1] + ypos/fontspec->size);
          glVertex3f(v2[0] * fontspec->size + xpos, v2[1] * fontspec->size + ypos, zval);

        }
        glEnd();
      }
      else { // SIDES

        if (!validprofile) {  // no profile - extrude
          const int * ptr = cc_glyph3d_getedgeindices(glyph);
          SbVec2f v0, v1;
          int counter = 0;

          glBegin(GL_QUADS);

          while (*ptr >= 0) {
            v1 = coords[*ptr++];
            v0 = coords[*ptr++];
            const int * ccw = (int *) cc_glyph3d_getnextccwedge(glyph, counter);
            const int * cw  = (int *) cc_glyph3d_getnextcwedge(glyph, counter);
            SbVec3f vleft(coords[*(ccw+1)][0], coords[*(ccw+1)][1], 0);
            SbVec3f vright(coords[*cw][0], coords[*cw][1], 0);
            counter++;

            // create two 'normal' vectors pointing out from the edges
            SbVec3f normala(vright[0] - v0[0], vright[1] - v0[1], 0.0f);
            normala = normala.cross(SbVec3f(0.0f, 0.0f,  1.0f));
            if (normala.length() > 0)
              normala.normalize();

            SbVec3f normalb(v1[0] - vleft[0], v1[1] - vleft[1], 0.0f);
            normalb = normalb.cross(SbVec3f(0.0f, 0.0f,  1.0f));
            if (normalb.length() > 0)
              normalb.normalize();

            SbBool flatshading = FALSE;
            float dot = normala.dot(normalb);

            if(acos(dot) > creaseangle) {
              normala = SbVec3f(v1[0] - v0[0], v1[1] - v0[1], 0.0f);
              normala = normala.cross(SbVec3f(0.0f, 0.0f, 1.0f));
              if (normala.length() > 0)
                normala.normalize();

              flatshading = TRUE;
            }

            if (!flatshading) {
              if(do2Dtextures)
                 glTexCoord2f(v1[0] + xpos/fontspec->size,
                              v1[1] + ypos/fontspec->size);
              glNormal3fv(normala.getValue());
              glVertex3f(v1[0]*fontspec->size + xpos, v1[1]*fontspec->size + ypos, 0.0f);

              if(do2Dtextures)
                glTexCoord2f(v0[0] + xpos/fontspec->size,
                             v0[1] + ypos/fontspec->size);
              glNormal3fv(normalb.getValue());
              glVertex3f(v0[0]*fontspec->size + xpos, v0[1]*fontspec->size + ypos, 0.0f);

              if(do2Dtextures)
                glTexCoord2f(v0[0] + xpos/fontspec->size,
                             v0[1] + ypos/fontspec->size);
              glNormal3fv(normalb.getValue());
              glVertex3f(v0[0]*fontspec->size + xpos, v0[1]*fontspec->size + ypos, -1.0f);

              if(do2Dtextures)
                glTexCoord2f(v1[0] + xpos/fontspec->size,
                             v1[1] + ypos/fontspec->size);
              glNormal3fv(normala.getValue());
              glVertex3f(v1[0]*fontspec->size + xpos, v1[1]*fontspec->size + ypos, -1.0f);

            }
            else {
              glNormal3fv(normala.getValue());
              if(do2Dtextures)
                glTexCoord2f(v1[0] + xpos/fontspec->size,
                             v1[1] + ypos/fontspec->size);
              glVertex3f(v1[0]*fontspec->size + xpos, v1[1]*fontspec->size + ypos, 0.0f);

              if(do2Dtextures)
                glTexCoord2f(v0[0] + xpos/fontspec->size,
                             v0[1] + ypos/fontspec->size);
              glVertex3f(v0[0]*fontspec->size + xpos, v0[1]*fontspec->size + ypos, 0.0f);

              if(do2Dtextures)
                glTexCoord2f(v0[0] + xpos/fontspec->size,
                             v0[1] + ypos/fontspec->size);
              glVertex3f(v0[0]*fontspec->size + xpos, v0[1]*fontspec->size + ypos, -1.0f);

              if(do2Dtextures)
                glTexCoord2f(v1[0] + xpos/fontspec->size,
                             v1[1] + ypos/fontspec->size);
              glVertex3f(v1[0]*fontspec->size + xpos, v1[1]*fontspec->size + ypos, -1.0f);
            }
          }
          glEnd();

        }
        else {  // profile
          assert(validprofile && firstprofile >= 0);

          const int * indices = cc_glyph3d_getedgeindices(glyph);
          int ind = 0;
          SbVec3f normala, normalb;

          SbList <SbVec3f> vertexlist;
          this->normalgenerator->reset(FALSE);

          while (*indices >= 0) {

            int i0 = *indices++;
            int i1 = *indices++;
            SbVec3f va(coords[i0][0], coords[i0][1], nearz);
            SbVec3f vb(coords[i1][0], coords[i1][1], nearz);
            const int * ccw = (int *) cc_glyph3d_getnextccwedge(glyph, ind);
            const int * cw  = (int *) cc_glyph3d_getnextcwedge(glyph, ind);
            SbVec3f vleft(coords[*(ccw+1)][0], coords[*(ccw+1)][1], nearz);
            SbVec3f vright(coords[*cw][0], coords[*cw][1], nearz);
            ind++;

            va[0] = va[0] * fontspec->size;
            va[1] = va[1] * fontspec->size;
            vb[0] = vb[0] * fontspec->size;
            vb[1] = vb[1] * fontspec->size;
            vleft[0] = vleft[0] * fontspec->size;
            vleft[1] = vleft[1] * fontspec->size;
            vright[0] = vright[0] * fontspec->size;
            vright[1] = vright[1] * fontspec->size;

            // create two 'normal' vectors pointing out from the edges
            SbVec3f normala(vleft[0] - va[0], vleft[1] - va[1], 0.0f);
            normala = normala.cross(SbVec3f(0.0f, 0.0f,  -1.0f));
            if (normala.length() > 0)
              normala.normalize();

            SbVec3f normalb(vb[0] - vright[0], vb[1] - vright[1], 0.0f);
            normalb = normalb.cross(SbVec3f(0.0f, 0.0f,  -1.0f));
            if (normalb.length() > 0)
              normalb.normalize();

            SoProfile * pn = (SoProfile *) profilenodes[firstprofile];
            pn->getVertices(state, profnum, profcoords);

            SbVec3f vc,vd;
            SbVec2f starta(va[0], va[1]);
            SbVec2f startb(vb[0], vb[1]);

            for (int j=firstprofile; j<numprofiles; j++) {
              SoProfile * pn = (SoProfile *) profilenodes[j];
              pn->getVertices(state, profnum, profcoords);

              for (int k=1; k<profnum; k++) {

                // Calc points for two next faces
                vd[0] = starta[0] + (profcoords[k][1] * normalb[0]);
                vd[1] = starta[1] + (profcoords[k][1] * normalb[1]);
                vd[2] = -profcoords[k][0];
                vc[0] = startb[0] + (profcoords[k][1] * normala[0]);
                vc[1] = startb[1] + (profcoords[k][1] * normala[1]);
                vc[2] = -profcoords[k][0];

                // The windows tesselation sometimes return
                // illegal/empty tris. A test must be done to
                // prevent stdout from being flooded with
                // normalize() warnings from inside the normal
                // generator.

                if ((va != vd) && (va != vb) && (vd != vb)) {
                  vertexlist.append(va);
                  vertexlist.append(vd);
                  vertexlist.append(vb);
                  normalgenerator->triangle(va,vd,vb);
                }

                if ((vb != vd) && (vb != vc) && (vd != vc)) {
                  vertexlist.append(vb);
                  vertexlist.append(vd);
                  vertexlist.append(vc);
                  normalgenerator->triangle(vb,vd,vc);
                }

                va = vd;
                vb = vc;

              }
            }

          }

          normalgenerator->generate(creaseangle);
          const SbVec3f * normals = normalgenerator->getNormals();
          const int size = vertexlist.getLength();

          // NOTE: We add the xpos and ypos to each vertex at this
          // point because Linux systems seems to accumulate an error
          // when calculating the normals (ie. two 'o's in a row
          // doesn't get the same normals due to the xpos
          // difference). This doesn't happen on Windows so it is
          // probably a floating point precision issue linked to the
          // compilator. (Tested on MSVC 6 and GCC 2.95.4) (20031010
          // handegar).

          glBegin(GL_TRIANGLES);

          for (int z = 0;z < size;z += 3) {

            // FIXME: Add proper texturing for profile
            // coords. (20031010 handegar)

            glNormal3fv(normals[z+2].getValue());
            glVertex3fv(SbVec3f(vertexlist[z+2][0] + xpos,
                                vertexlist[z+2][1] + ypos,
                                vertexlist[z+2][2]).getValue());

            glNormal3fv(normals[z+1].getValue());
            glVertex3fv(SbVec3f(vertexlist[z+1][0] + xpos,
                                vertexlist[z+1][1] + ypos,
                                vertexlist[z+1][2]).getValue());

            glNormal3fv(normals[z].getValue());
            glVertex3fv(SbVec3f(vertexlist[z][0] + xpos,
                                vertexlist[z][1] + ypos,
                                vertexlist[z][2]).getValue());
          }
          glEnd();

          vertexlist.truncate(0);

        }

      }

      float advancex, advancey;
      cc_glyph3d_getadvance(glyph, &advancex, &advancey);
      xpos += advancex * fontspec->size;

    }
    if (prevglyph) {
      cc_glyph3d_unref(prevglyph);
      prevglyph = NULL;
    }
    ypos -= fontspec->size * PUBLIC(this)->spacing.getValue();
  }
}

// render text geometry
void
SoText3::render(SoState * COIN_UNUSED_ARG(state), unsigned int COIN_UNUSED_ARG(part))
{
  assert(FALSE && "obsoleted");
}

void
SoText3::generate(SoAction * COIN_UNUSED_ARG(action), unsigned int COIN_UNUSED_ARG(part))
{
  assert(FALSE && "obsoleted");
}

// generate text geometry
void
SoText3P::generate(SoAction * action, const cc_font_specification * fontspec,
                   unsigned int part)
{
  SoState * state = action->getState();

  // SoCreaseAngleElement is not enabled for SoGetPrimitiveCountAction.
  float creaseangle = 0.5f;
  if (state->isElementEnabled(SoCreaseAngleElement::getClassStackIndex())) {
    creaseangle = SoCreaseAngleElement::get(state);
  }
  SoPrimitiveVertex vertex;
  SoTextDetail detail;
  detail.setPart(part);
  vertex.setDetail(&detail);

  // we might get here from getPrimitiveCount(). We therefore need to
  // check if lazy element is enabled
  if (SoMaterialBindingElement::get(state) !=
      SoMaterialBindingElement::OVERALL &&
      state->isElementEnabled(SoLazyElement::getClassStackIndex())) {

    SoLazyElement * lazyelement = SoLazyElement::getInstance(state);
    const int numdiffuse = lazyelement->getNumDiffuse();

    if (part == SoText3::SIDES && (numdiffuse > 1))
      vertex.setMaterialIndex(1);
    else if (part == SoText3::BACK && (numdiffuse > 2))
      vertex.setMaterialIndex(2);
  }

  SbBool do2Dtextures = FALSE;
  SbBool do3Dtextures = FALSE;

  // not all actions have these elements enabled
  // (for instance SoGetPrimitiveCountAction)
  if (state->isElementEnabled(SoMultiTextureEnabledElement::getClassStackIndex())) {
    if (SoMultiTextureEnabledElement::get(state)) do2Dtextures = TRUE;
  }
  // FIXME: implement proper support for 3D-texturing, and get rid of
  // this. (20031010 handegar)
  if (do3Dtextures) {
    static SbBool first = TRUE;
    if (first) {
      first = FALSE;
#if COIN_DEBUG
      SoDebugError::postWarning("SoText3::GLRender",
                                "3D-textures not supported for this node type yet.");
#endif // COIN_DEBUG
    }
  }


  int i, n = this->widths.getLength();

  int firstprofile = -1;
  int32_t profnum;
  SbVec2f *profcoords;
  float nearz =  FLT_MAX;
  float farz  = -FLT_MAX;

  const SoNodeList & profilenodes = SoProfileElement::get(state);
  int numprofiles = profilenodes.getLength();

  if (numprofiles > 0) {
    assert(profilenodes[0]->getTypeId().isDerivedFrom(SoProfile::getClassTypeId()));
    // Find near/far z (for modifying position of front/back)

    for (int l = numprofiles-1; l >= 0; l--) {
      SoProfile * pn = (SoProfile *)profilenodes[l];
      pn->getVertices(state, profnum, profcoords);

      if (profnum > 0) {
        if (profcoords[profnum-1][0] > farz) farz = profcoords[profnum-1][0];
        if (profcoords[0][0] < nearz) nearz = profcoords[0][0];
        if (pn->linkage.getValue() == SoProfile::START_FIRST) {
          if (firstprofile == -1) firstprofile = l;
          break;
        }
      }
    }

    nearz = -nearz;
    farz = -farz;
  }
  else {
    nearz = 0.0;
    farz = -1.0;
  }

  float ypos = 0.0f;
  for (i = 0; i < n; i++) {
    detail.setStringIndex(i);
    float xpos = 0.0f;
    switch (PUBLIC(this)->justification.getValue()) {
    case SoText3::RIGHT:
      xpos = -this->widths[i];
      break;
    case SoText3::CENTER:
      xpos = - this->widths[i] * 0.5f;
      break;
    }

    SbString str = PUBLIC(this)->string[i];
    cc_glyph3d * prevglyph = NULL;
    const char * p = str.getString();
    size_t length = cc_string_utf8_validate_length(p);
    assert(length);

    for (unsigned int strcharidx = 0; strcharidx < length; strcharidx++) {
      uint32_t glyphidx = 0;

      glyphidx = cc_string_utf8_get_char(p);
      p = cc_string_utf8_next_char(p);

      cc_glyph3d * glyph = cc_glyph3d_ref(glyphidx, fontspec);
      const SbVec2f * coords = (SbVec2f *) cc_glyph3d_getcoords(glyph);

      detail.setCharacterIndex(strcharidx);

      // Get kerning
      if (strcharidx > 0) {
        float kerningx, kerningy;
        cc_glyph3d_getkerning(prevglyph, glyph, &kerningx, &kerningy);
        xpos += kerningx * fontspec->size;
      }
      if (prevglyph) {
        cc_glyph3d_unref(prevglyph);
      }
      prevglyph = glyph;

      if (part != SoText3::SIDES) {  // FRONT & BACK
        const int * ptr = cc_glyph3d_getfaceindices(glyph);
        PUBLIC(this)->beginShape(action, SoShape::TRIANGLES, NULL);

        while (*ptr >= 0) {
          SbVec2f v0, v1, v2;
          float zval;
          if (part == SoText3::FRONT) {
            vertex.setNormal(SbVec3f(0.0f, 0.0f, 1.0f));
            v2 = coords[*ptr++];
            v1 = coords[*ptr++];
            v0 = coords[*ptr++];
            zval = nearz;
          }
          else {  // BACK
            vertex.setNormal(SbVec3f(0.0f, 0.0f, -1.0f));
            v0 = coords[*ptr++];
            v1 = coords[*ptr++];
            v2 = coords[*ptr++];
            zval = farz;
          }

          if(do2Dtextures) {
            vertex.setTextureCoords(SbVec2f(v0[0] + xpos/fontspec->size, v0[1] + ypos/fontspec->size));
          }
          vertex.setPoint(SbVec3f(v0[0] * fontspec->size + xpos, v0[1] * fontspec->size + ypos, zval));
          PUBLIC(this)->shapeVertex(&vertex);

          if(do2Dtextures) {
            vertex.setTextureCoords(SbVec2f(v1[0] + xpos/fontspec->size, v1[1] + ypos/fontspec->size));
          }
          vertex.setPoint(SbVec3f(v1[0] * fontspec->size + xpos, v1[1] * fontspec->size + ypos, zval));
          PUBLIC(this)->shapeVertex(&vertex);

          if(do2Dtextures) {
            vertex.setTextureCoords(SbVec2f(v2[0] + xpos/fontspec->size, v2[1] + ypos/fontspec->size));
          }
          vertex.setPoint(SbVec3f(v2[0] * fontspec->size + xpos, v2[1] * fontspec->size + ypos, zval));
          PUBLIC(this)->shapeVertex(&vertex);
        }

        PUBLIC(this)->endShape();

      }
      else { // SIDES
        if (profilenodes.getLength() == 0) {  // no profile - extrude

          const int * ptr = cc_glyph3d_getedgeindices(glyph);
          SbVec2f v0, v1;
          int counter = 0;
          PUBLIC(this)->beginShape(action, SoShape::QUADS, NULL);

          while (*ptr >= 0) {
            v1 = coords[*ptr++];
            v0 = coords[*ptr++];
            const int * ccw = (int *) cc_glyph3d_getnextccwedge(glyph, counter);
            const int * cw  = (int *) cc_glyph3d_getnextcwedge(glyph, counter);
            SbVec3f vleft(coords[*(ccw+1)][0], coords[*(ccw+1)][1], 0);
            SbVec3f vright(coords[*cw][0], coords[*cw][1], 0);
            counter++;

            v0[0] = v0[0];
            v0[1] = v0[1];
            v1[0] = v1[0];
            v1[1] = v1[1];
            vleft[0] = vleft[0];
            vleft[1] = vleft[1];
            vright[0] = vright[0];
            vright[1] = vright[1];

            // create two 'normal' vectors pointing out from the edges
            SbVec3f normala(vright[0] - v0[0], vright[1] - v0[1], 0.0f);
            normala = normala.cross(SbVec3f(0.0f, 0.0f,  1.0f));
            if (normala.length() > 0)
              normala.normalize();

            SbVec3f normalb(v1[0] - vleft[0], v1[1] - vleft[1], 0.0f);
            normalb = normalb.cross(SbVec3f(0.0f, 0.0f,  1.0f));
            if (normalb.length() > 0)
              normalb.normalize();

            SbBool flatshading = FALSE;
            float dot = normala.dot(normalb);
            if(acos(dot) > creaseangle) {
              normala = SbVec3f(v1[0] - v0[0], v1[1] - v0[1], 0.0f);
              normala = normala.cross(SbVec3f(0.0f, 0.0f,  1.0f));
              if (normala.length() > 0)
                normala.normalize();
              flatshading = TRUE;
            }

            if (!flatshading) {
              if (do2Dtextures) {
                vertex.setTextureCoords(SbVec2f(v1[0] + xpos/fontspec->size,
                                                v1[1] + ypos/fontspec->size));
              }
              vertex.setNormal(normala);
              vertex.setPoint(SbVec3f(v1[0]*fontspec->size + xpos, v1[1]*fontspec->size + ypos, 0.0f));
              PUBLIC(this)->shapeVertex(&vertex);

              if (do2Dtextures) {
                vertex.setTextureCoords(SbVec2f(v0[0] + xpos/fontspec->size,
                                                v0[1] + ypos/fontspec->size));
              }
              vertex.setNormal(normalb);
              vertex.setPoint(SbVec3f(v0[0]*fontspec->size + xpos, v0[1]*fontspec->size + ypos, 0.0f));
              PUBLIC(this)->shapeVertex(&vertex);

              if (do2Dtextures) {
                vertex.setTextureCoords(SbVec2f(v0[0] + xpos/fontspec->size,
                                                v0[1] + ypos/fontspec->size));
              }
              vertex.setNormal(normalb);
              vertex.setPoint(SbVec3f(v0[0]*fontspec->size + xpos, v0[1]*fontspec->size + ypos, -1.0f));
              PUBLIC(this)->shapeVertex(&vertex);

              if (do2Dtextures) {
                vertex.setTextureCoords(SbVec2f(v1[0] + xpos/fontspec->size,
                                                v1[1] + ypos/fontspec->size));
              }
              vertex.setNormal(normala);
              vertex.setPoint(SbVec3f(v1[0]*fontspec->size + xpos, v1[1]*fontspec->size + ypos, -1.0f));
              PUBLIC(this)->shapeVertex(&vertex);
            }
            else {
              vertex.setNormal(normala);

              if (do2Dtextures) {
                vertex.setTextureCoords(SbVec2f(v1[0] + xpos/fontspec->size,
                                                v1[1] + ypos/fontspec->size));
              }
              vertex.setPoint(SbVec3f(v1[0]*fontspec->size + xpos, v1[1]*fontspec->size + ypos, 0.0f));
              PUBLIC(this)->shapeVertex(&vertex);

              if (do2Dtextures) {
                vertex.setTextureCoords(SbVec2f(v0[0] + xpos/fontspec->size,
                                                v0[1] + ypos/fontspec->size));
              }
              vertex.setPoint(SbVec3f(v0[0]*fontspec->size + xpos, v0[1]*fontspec->size + ypos, 0.0f));
              PUBLIC(this)->shapeVertex(&vertex);

              if (do2Dtextures) {
                vertex.setTextureCoords(SbVec2f(v0[0] + xpos/fontspec->size,
                                                v0[1] + ypos/fontspec->size));
              }
              vertex.setPoint(SbVec3f(v0[0]*fontspec->size + xpos, v0[1]*fontspec->size + ypos, -1.0f));
              PUBLIC(this)->shapeVertex(&vertex);

              if (do2Dtextures) {
                vertex.setTextureCoords(SbVec2f(v1[0] + xpos/fontspec->size,
                                                v1[1] + ypos/fontspec->size));
              }
              vertex.setPoint(SbVec3f(v1[0]*fontspec->size + xpos, v1[1]*fontspec->size + ypos, -1.0f));
              PUBLIC(this)->shapeVertex(&vertex);

            }
          }

          PUBLIC(this)->endShape();

        }
        else {  // profile

          const int *indices = cc_glyph3d_getedgeindices(glyph);
          int ind = 0;
          SbVec3f normala, normalb;

          SbList <SbVec3f> vertexlist;
          this->normalgenerator->reset(FALSE);

          while (*indices >= 0) {

            int i0 = *indices++;
            int i1 = *indices++;
            SbVec3f va(coords[i0][0], coords[i0][1], nearz);
            SbVec3f vb(coords[i1][0], coords[i1][1], nearz);
            const int *ccw = (int *) cc_glyph3d_getnextccwedge(glyph, ind);
            const int *cw  = (int *) cc_glyph3d_getnextcwedge(glyph, ind);
            SbVec3f vleft(coords[*(ccw+1)][0], coords[*(ccw+1)][1], nearz);
            SbVec3f vright(coords[*cw][0], coords[*cw][1], nearz);
            ind++;

            va[0] = va[0] * fontspec->size;
            va[1] = va[1] * fontspec->size;
            vb[0] = vb[0] * fontspec->size;
            vb[1] = vb[1] * fontspec->size;
            vleft[0] = vleft[0] * fontspec->size;
            vleft[1] = vleft[1] * fontspec->size;
            vright[0] = vright[0] * fontspec->size;
            vright[1] = vright[1] * fontspec->size;

            // create two 'normal' vectors pointing out from the edges
            SbVec3f normala(vleft[0] - va[0], vleft[1] - va[1], 0.0f);
            normala = normala.cross(SbVec3f(0.0f, 0.0f,  -1.0f));
            if (normala.length() > 0)
              normala.normalize();

            SbVec3f normalb(vb[0] - vright[0], vb[1] - vright[1], 0.0f);
            normalb = normalb.cross(SbVec3f(0.0f, 0.0f,  -1.0f));
            if (normalb.length() > 0)
              normalb.normalize();

            SoProfile *pn = (SoProfile *)profilenodes[firstprofile];
            pn->getVertices(state, profnum, profcoords);

            SbVec3f vc,vd;
            SbVec2f starta(va[0], va[1]);
            SbVec2f startb(vb[0], vb[1]);

            for (int j=firstprofile; j<numprofiles; j++) {
              SoProfile *pn = (SoProfile *)profilenodes[j];
              pn->getVertices(state, profnum, profcoords);

              for (int k=1; k<profnum; k++) {

                // Calc points for two next faces
                vd[0] = starta[0] + (profcoords[k][1] * normalb[0]);
                vd[1] = starta[1] + (profcoords[k][1] * normalb[1]);
                vd[2] = -profcoords[k][0];
                vc[0] = startb[0] + (profcoords[k][1] * normala[0]);
                vc[1] = startb[1] + (profcoords[k][1] * normala[1]);
                vc[2] = -profcoords[k][0];

                // The windows tesselation sometimes return
                // illegal/empty tris. A test must be done to prevent
                // stdout from being flooded with normalize() warnings
                // from inside the normal generator.

                if ((va != vd) && (va != vb) && (vd != vb)) {
                  vertexlist.append(va);
                  vertexlist.append(vd);
                  vertexlist.append(vb);
                  normalgenerator->triangle(va,vd,vb);
                }

                if ((vb != vd) && (vb != vc) && (vd != vc)) {
                  vertexlist.append(vb);
                  vertexlist.append(vd);
                  vertexlist.append(vc);
                  normalgenerator->triangle(vb,vd,vc);
                }

                va = vd;
                vb = vc;

              }

            }

          }


          normalgenerator->generate(creaseangle);
          const SbVec3f * normals = normalgenerator->getNormals();
          const int size = vertexlist.getLength();

          PUBLIC(this)->beginShape(action, SoShape::TRIANGLES, NULL);
          for (int z = 0;z < size;z += 3) {
            vertex.setNormal(normals[z+2].getValue());
            vertex.setPoint(SbVec3f(vertexlist[z+2][0] + xpos,
                                    vertexlist[z+2][1] + ypos,
                                    vertexlist[z+2][2]).getValue());
            PUBLIC(this)->shapeVertex(&vertex);

            vertex.setNormal(normals[z+1].getValue());
            vertex.setPoint(SbVec3f(vertexlist[z+1][0] + xpos,
                                    vertexlist[z+1][1] + ypos,
                                    vertexlist[z+1][2]).getValue());
            PUBLIC(this)->shapeVertex(&vertex);

            vertex.setNormal(normals[z].getValue());
            vertex.setPoint(SbVec3f(vertexlist[z][0] + xpos,
                                    vertexlist[z][1] + ypos,
                                    vertexlist[z][2]).getValue());
            PUBLIC(this)->shapeVertex(&vertex);

          }
          PUBLIC(this)->endShape();
          vertexlist.truncate(0);

        }
      }

      float advancex, advancey;
      cc_glyph3d_getadvance(glyph, &advancex, &advancey);
      xpos += advancex * fontspec->size;

    }
    if (prevglyph) {
      cc_glyph3d_unref(prevglyph);
      prevglyph = NULL;
    }
    ypos -= fontspec->size * PUBLIC(this)->spacing.getValue();
  }


}

// Documented in superclass.
void
SoText3::notify(SoNotList * list)
{
  PRIVATE(this)->lock();
  if (PRIVATE(this)->cache) {
    SoField * f = list->getLastField();
    if (f == &this->string) PRIVATE(this)->cache->invalidate();
  }
  PRIVATE(this)->unlock();
  inherited::notify(list);
}

// recalculate glyphs
void
SoText3P::setUpGlyphs(SoState * state, SoText3 * textnode)
{
  // not all actions have SoCacheElement enabled
  if (!state->isElementEnabled(SoCacheElement::getClassStackIndex())) return;
  if (this->cache && this->cache->isValid(state)) return;
  SoGlyphCache * oldcache = this->cache;

  state->push();
  SbBool storedinvalid = SoCacheElement::setInvalid(FALSE);
  this->cache = new SoGlyphCache(state);
  this->cache->ref();
  SoCacheElement::set(state, this->cache);
  this->cache->readFontspec(state);
  const cc_font_specification * fontspec = this->cache->getCachedFontspec();

  this->widths.truncate(0);

  for (int i = 0; i < textnode->string.getNum(); i++) {

    float stringwidth = 0.0f;
    float kerningx = 0;
    float kerningy = 0;
    float advancex = 0;
    float advancey = 0;
    cc_glyph3d * prevglyph = NULL;

    const float * maxbbox;
    this->maxglyphbbox.makeEmpty();

    SbString str = textnode->string[i];
    const char * p = str.getString();
    size_t length = cc_string_utf8_validate_length(p);
    assert(length);

    for (unsigned int strcharidx = 0; strcharidx < length; strcharidx++) {
      uint32_t glyphidx = 0;

      glyphidx = cc_string_utf8_get_char(p);
      p = cc_string_utf8_next_char(p);

      cc_glyph3d * glyph = cc_glyph3d_ref(glyphidx, fontspec);
      this->cache->addGlyph(glyph);
      assert(glyph);

      maxbbox = cc_glyph3d_getboundingbox(glyph); // Get max height

      this->maxglyphbbox.extendBy(SbVec3f(0, maxbbox[1] * fontspec->size, 0));
      this->maxglyphbbox.extendBy(SbVec3f(0, maxbbox[3] * fontspec->size, 0)); 

      if (strcharidx > 0)
        cc_glyph3d_getkerning(prevglyph, glyph, &kerningx, &kerningy);
      cc_glyph3d_getadvance(glyph, &advancex, &advancey);

      stringwidth += (advancex + kerningx) * fontspec->size;
      prevglyph = glyph;
    }

    if (prevglyph != NULL) {
      // Italic font might cause last letter to be outside bbox. Add width if needed.
      if (advancex < cc_glyph3d_getwidth(prevglyph))
        stringwidth += (cc_glyph3d_getwidth(prevglyph) - advancex) * fontspec->size;
    }

    this->widths.append(stringwidth);
  }

  state->pop();
  SoCacheElement::setInvalid(storedinvalid);

  // unref old cache after creating the new one to avoid recreating glyphs
  if (oldcache) oldcache->unref();

}

#undef PRIVATE
#undef PUBLIC
