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Enabled the settng/getting of the Text3D's WallStateSet and BackStateSet along with use of these in the rendering implementation

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to allow separate colour and other state to be assigned to the front, wall and back faces.
This commit is contained in:
Robert Osfield 2011-03-07 12:33:11 +00:00
parent afecdbb46b
commit 215fca84f7
2 changed files with 136 additions and 88 deletions
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180
include/osgText/Text3D
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@ -23,128 +23,132 @@ namespace osgText {
class OSGTEXT_EXPORT Text3D : public osgText::TextBase class OSGTEXT_EXPORT Text3D : public osgText::TextBase
{ {
public: public:
/** Reder mode used to render the Text. /** Reder mode used to render the Text.
* PER_FACE : render all front face with the default StateSet * PER_FACE : render all front face with the default StateSet
* all wall face with the wall StateSet * all wall face with the wall StateSet
* all back face with the back StateSet (back face of the character, no the OpenGL back face) * all back face with the back StateSet (back face of the character, no the OpenGL back face)
* *
* PER_GLYPH : render all Charactere with the default StateSet * PER_GLYPH : render all Charactere with the default StateSet
*/ */
enum RenderMode enum RenderMode
{ {
PER_FACE, PER_FACE,
PER_GLYPH PER_GLYPH
}; };
Text3D(); Text3D();
Text3D(const Text3D& text,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY); Text3D(const Text3D& text,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
META_Object(osgText,Text3D) META_Object(osgText,Text3D)
/** Get the Charactere Depth of text. */ /** Get the Charactere Depth of text. */
float getCharacterDepth() const; float getCharacterDepth() const;
/** Set the Charactere Depth of text. */ /** Set the Charactere Depth of text. */
void setCharacterDepth(float characterDepth); void setCharacterDepth(float characterDepth);
/** Get the render mode used to render the text. */ /** Get the render mode used to render the text. */
RenderMode getRenderMode() const { return _renderMode; } RenderMode getRenderMode() const { return _renderMode; }
/** Set the render mode used to render the text. */ /** Set the render mode used to render the text. */
void setRenderMode(RenderMode renderMode) { _renderMode = renderMode; computeGlyphRepresentation(); } void setRenderMode(RenderMode renderMode) { _renderMode = renderMode; computeGlyphRepresentation(); }
// /** Get the wall StateSet */
// osg::StateSet * getWallStateSet() { return _wallStateSet.get(); } /** Get the wall StateSet */
// /** Get or create the wall StateSet */ osg::StateSet* getWallStateSet() { return _wallStateSet.get(); }
// osg::StateSet * getOrCreateWallStateSet() /** Get the wall StateSet */
// { const osg::StateSet* getWallStateSet() const { return _wallStateSet.get(); }
// if (_wallStateSet.valid() == false) _wallStateSet = new osg::StateSet; /** Get or create the wall StateSet */
// return _wallStateSet.get(); osg::StateSet* getOrCreateWallStateSet()
// } {
// /** Set the wall StateSet */ if (_wallStateSet.valid() == false) _wallStateSet = new osg::StateSet;
// void setWallStateSet(osg::StateSet * wallStateSet) { _wallStateSet = wallStateSet; } return _wallStateSet.get();
// }
// /** Get the back StateSet */ /** Set the wall StateSet */
// osg::StateSet * getBackStateSet() { return _backStateSet.get(); } void setWallStateSet(osg::StateSet* wallStateSet) { _wallStateSet = wallStateSet; }
// /** Get or create the back StateSet */
// osg::StateSet * getOrCreateBackStateSet() { if (_backStateSet.valid() == false) _backStateSet = new osg::StateSet; return _backStateSet.get(); } /** Get the back StateSet */
// /** Set the back StateSet */ osg::StateSet* getBackStateSet() { return _backStateSet.get(); }
// void setBackStateSet(osg::StateSet * backStateSet) { _backStateSet = backStateSet; } /** Get the back StateSet */
// osg::StateSet* getBackStateSet() const { return _backStateSet.get(); }
/** Get or create the back StateSet */
osg::StateSet* getOrCreateBackStateSet() { if (_backStateSet.valid() == false) _backStateSet = new osg::StateSet; return _backStateSet.get(); }
/** Set the back StateSet */
void setBackStateSet(osg::StateSet* backStateSet) { _backStateSet = backStateSet; }
/** Draw the text.*/ /** Draw the text.*/
virtual void drawImplementation(osg::RenderInfo& renderInfo) const; virtual void drawImplementation(osg::RenderInfo& renderInfo) const;
/** return false, osgText::Text does not support accept(AttributeFunctor&).*/ /** return false, osgText::Text does not support accept(AttributeFunctor&).*/
virtual bool supports(const osg::Drawable::AttributeFunctor&) const { return false; } virtual bool supports(const osg::Drawable::AttributeFunctor&) const { return false; }
/** return true, osgText::Text does support accept(ConstAttributeFunctor&).*/ /** return true, osgText::Text does support accept(ConstAttributeFunctor&).*/
virtual bool supports(const osg::Drawable::ConstAttributeFunctor&) const { return false; } virtual bool supports(const osg::Drawable::ConstAttributeFunctor&) const { return false; }
/** accept an ConstAttributeFunctor and call its methods to tell it about the interal attributes that this Drawable has.*/ /** accept an ConstAttributeFunctor and call its methods to tell it about the interal attributes that this Drawable has.*/
virtual void accept(osg::Drawable::ConstAttributeFunctor& af) const; virtual void accept(osg::Drawable::ConstAttributeFunctor& af) const;
/** return true, osgText::Text does support accept(PrimitiveFunctor&) .*/ /** return true, osgText::Text does support accept(PrimitiveFunctor&) .*/
virtual bool supports(const osg::PrimitiveFunctor&) const { return false; } virtual bool supports(const osg::PrimitiveFunctor&) const { return false; }
/** accept a PrimtiveFunctor and call its methods to tell it about the interal primtives that this Drawable has.*/ /** accept a PrimtiveFunctor and call its methods to tell it about the interal primtives that this Drawable has.*/
virtual void accept(osg::PrimitiveFunctor& pf) const; virtual void accept(osg::PrimitiveFunctor& pf) const;
/** Set whether to use a mutex to ensure ref() and unref() are thread safe.*/ /** Set whether to use a mutex to ensure ref() and unref() are thread safe.*/
virtual void setThreadSafeRefUnref(bool threadSafe); virtual void setThreadSafeRefUnref(bool threadSafe);
/** Resize any per context GLObject buffers to specified size. */ /** Resize any per context GLObject buffers to specified size. */
virtual void resizeGLObjectBuffers(unsigned int maxSize); virtual void resizeGLObjectBuffers(unsigned int maxSize);
/** If State is non-zero, this function releases OpenGL objects for /** If State is non-zero, this function releases OpenGL objects for
* the specified graphics context. Otherwise, releases OpenGL objexts * the specified graphics context. Otherwise, releases OpenGL objexts
* for all graphics contexts. */ * for all graphics contexts. */
virtual void releaseGLObjects(osg::State* state=0) const; virtual void releaseGLObjects(osg::State* state=0) const;
// // make Font a friend to allow it set the _font to 0 if the font is // // make Font a friend to allow it set the _font to 0 if the font is
// // forcefully unloaded. // // forcefully unloaded.
friend class Font; friend class Font;
virtual osg::BoundingBox computeBound() const; virtual osg::BoundingBox computeBound() const;
protected: protected:
virtual ~Text3D() {} virtual ~Text3D() {}
void renderPerGlyph(osg::State & state) const; void renderPerGlyph(osg::State & state) const;
void renderPerFace(osg::State & state) const; void renderPerFace(osg::State & state) const;
String::iterator computeLastCharacterOnLine(osg::Vec2& cursor, String::iterator first,String::iterator last); String::iterator computeLastCharacterOnLine(osg::Vec2& cursor, String::iterator first,String::iterator last);
void computeGlyphRepresentation(); void computeGlyphRepresentation();
void computePositions(unsigned int contextID) const; void computePositions(unsigned int contextID) const;
// ** glyph and other information to render the glyph // ** glyph and other information to render the glyph
struct GlyphRenderInfo struct GlyphRenderInfo
{ {
GlyphRenderInfo(GlyphGeometry* glyphGeometry, osg::Vec3 & pos): GlyphRenderInfo(GlyphGeometry* glyphGeometry, osg::Vec3 & pos):
_glyphGeometry(glyphGeometry), _glyphGeometry(glyphGeometry),
_position(pos) {} _position(pos) {}
osg::ref_ptr<GlyphGeometry> _glyphGeometry; osg::ref_ptr<GlyphGeometry> _glyphGeometry;
osg::Vec3 _position; osg::Vec3 _position;
}; };
typedef std::vector<GlyphRenderInfo> LineRenderInfo; typedef std::vector<GlyphRenderInfo> LineRenderInfo;
typedef std::vector<LineRenderInfo> TextRenderInfo; typedef std::vector<LineRenderInfo> TextRenderInfo;
TextRenderInfo _textRenderInfo; TextRenderInfo _textRenderInfo;
RenderMode _renderMode; RenderMode _renderMode;
osg::ref_ptr<osg::StateSet> _wallStateSet; osg::ref_ptr<osg::StateSet> _wallStateSet;
osg::ref_ptr<osg::StateSet> _backStateSet; osg::ref_ptr<osg::StateSet> _backStateSet;
}; };
} }

44
src/osgText/Text3D.cpp
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@ -584,6 +584,17 @@ void Text3D::renderPerGlyph(osg::State & state) const
{ {
osg::Matrix original_modelview = state.getModelViewMatrix(); osg::Matrix original_modelview = state.getModelViewMatrix();
const osg::StateSet* frontStateSet = getStateSet();
const osg::StateSet* wallStateSet = getWallStateSet();
const osg::StateSet* backStateSet = getBackStateSet();
bool applyMainColor = false;
if (wallStateSet==0) wallStateSet = frontStateSet;
else if (wallStateSet->getAttribute(osg::StateAttribute::MATERIAL)!=0) applyMainColor = true;
if (backStateSet==0) backStateSet = frontStateSet;
else if (backStateSet->getAttribute(osg::StateAttribute::MATERIAL)!=0) applyMainColor = true;
// ** for each line, do ... // ** for each line, do ...
TextRenderInfo::const_iterator itLine, endLine = _textRenderInfo.end(); TextRenderInfo::const_iterator itLine, endLine = _textRenderInfo.end();
for (itLine = _textRenderInfo.begin(); itLine!=endLine; ++itLine) for (itLine = _textRenderInfo.begin(); itLine!=endLine; ++itLine)
@ -605,6 +616,11 @@ void Text3D::renderPerGlyph(osg::State & state) const
state.applyDisablingOfVertexAttributes(); state.applyDisablingOfVertexAttributes();
if (frontStateSet!=backStateSet)
{
state.apply(frontStateSet);
if (applyMainColor) state.Color(_color.r(),_color.g(),_color.b(),_color.a());
}
osg::Geometry::PrimitiveSetList & pslFront = it->_glyphGeometry->getFrontPrimitiveSetList(); osg::Geometry::PrimitiveSetList & pslFront = it->_glyphGeometry->getFrontPrimitiveSetList();
for(osg::Geometry::PrimitiveSetList::const_iterator itr=pslFront.begin(), end = pslFront.end(); itr!=end; ++itr) for(osg::Geometry::PrimitiveSetList::const_iterator itr=pslFront.begin(), end = pslFront.end(); itr!=end; ++itr)
@ -612,6 +628,8 @@ void Text3D::renderPerGlyph(osg::State & state) const
(*itr)->draw(state, false); (*itr)->draw(state, false);
} }
if (wallStateSet!=frontStateSet) state.apply(wallStateSet);
// ** render the wall face of the glyph // ** render the wall face of the glyph
osg::Geometry::PrimitiveSetList & pslWall = it->_glyphGeometry->getWallPrimitiveSetList(); osg::Geometry::PrimitiveSetList & pslWall = it->_glyphGeometry->getWallPrimitiveSetList();
for(osg::Geometry::PrimitiveSetList::const_iterator itr=pslWall.begin(), end=pslWall.end(); itr!=end; ++itr) for(osg::Geometry::PrimitiveSetList::const_iterator itr=pslWall.begin(), end=pslWall.end(); itr!=end; ++itr)
@ -619,6 +637,12 @@ void Text3D::renderPerGlyph(osg::State & state) const
(*itr)->draw(state, false); (*itr)->draw(state, false);
} }
if (backStateSet!=wallStateSet)
{
state.apply(backStateSet);
if (applyMainColor) state.Color(_color.r(),_color.g(),_color.b(),_color.a());
}
osg::Geometry::PrimitiveSetList & pslBack = it->_glyphGeometry->getBackPrimitiveSetList(); osg::Geometry::PrimitiveSetList & pslBack = it->_glyphGeometry->getBackPrimitiveSetList();
for(osg::Geometry::PrimitiveSetList::const_iterator itr=pslBack.begin(), end=pslBack.end(); itr!=end; ++itr) for(osg::Geometry::PrimitiveSetList::const_iterator itr=pslBack.begin(), end=pslBack.end(); itr!=end; ++itr)
{ {
@ -636,6 +660,18 @@ void Text3D::renderPerFace(osg::State & state) const
state.Normal(0.0f,0.0f,1.0f); state.Normal(0.0f,0.0f,1.0f);
#endif #endif
const osg::StateSet* frontStateSet = getStateSet();
const osg::StateSet* wallStateSet = getWallStateSet();
const osg::StateSet* backStateSet = getBackStateSet();
bool applyMainColor = false;
if (wallStateSet==0) wallStateSet = frontStateSet;
else if (wallStateSet->getAttribute(osg::StateAttribute::MATERIAL)!=0) applyMainColor = true;
if (backStateSet==0) backStateSet = frontStateSet;
else if (backStateSet->getAttribute(osg::StateAttribute::MATERIAL)!=0) applyMainColor = true;
TextRenderInfo::const_iterator itLine, endLine = _textRenderInfo.end(); TextRenderInfo::const_iterator itLine, endLine = _textRenderInfo.end();
for (itLine = _textRenderInfo.begin(); itLine!=endLine; ++itLine) for (itLine = _textRenderInfo.begin(); itLine!=endLine; ++itLine)
{ {
@ -659,6 +695,7 @@ void Text3D::renderPerFace(osg::State & state) const
} }
} }
if (wallStateSet!=frontStateSet) state.apply(wallStateSet);
// ** render all wall face of the text // ** render all wall face of the text
for (itLine = _textRenderInfo.begin(); itLine!=endLine; ++itLine) for (itLine = _textRenderInfo.begin(); itLine!=endLine; ++itLine)
@ -687,6 +724,13 @@ void Text3D::renderPerFace(osg::State & state) const
// ** render all back face of the text // ** render all back face of the text
state.Normal(0.0f,0.0f,-1.0f); state.Normal(0.0f,0.0f,-1.0f);
#endif #endif
if (backStateSet!=wallStateSet)
{
state.apply(backStateSet);
if (applyMainColor) state.Color(_color.r(),_color.g(),_color.b(),_color.a());
}
for (itLine = _textRenderInfo.begin(); itLine!=endLine; ++itLine) for (itLine = _textRenderInfo.begin(); itLine!=endLine; ++itLine)
{ {
// ** for each glyph in the line, do ... // ** for each glyph in the line, do ...