Refactored osgText::Font so that it now supports both 2D and 3D glyphs.
Added TextNode.h and TextNode.cpp to examples/osgtext3D in prep for introducing the new node to osgText library
This commit is contained in:
Robert Osfield
289
examples/osgtext3D/TextNode.cpp
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289
examples/osgtext3D/TextNode.cpp
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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2010 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#include "TextNode.h"
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#include <osg/io_utils>
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using namespace osgText;
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/////////////////////////////////////////////////////////////////////////////////////////
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//
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// Bevel
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//
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Bevel::Bevel()
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{
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_thickness = 0.1f;
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flatBevel();
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}
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Bevel::Bevel(const Bevel& bevel, const osg::CopyOp&):
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_thickness(bevel._thickness),
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_vertices(bevel._vertices)
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{
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}
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void Bevel::flatBevel(float width)
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{
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_vertices.clear();
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if (width>0.5f) width = 0.5f;
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_vertices.push_back(osg::Vec2(0.0f,0.0f));
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_vertices.push_back(osg::Vec2(width,1.0f));
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if (width<0.5f) _vertices.push_back(osg::Vec2(1-width,1.0f));
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_vertices.push_back(osg::Vec2(1.0f,0.0f));
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}
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void Bevel::roundedBevel(float width, unsigned int numSteps)
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{
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_vertices.clear();
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if (width>0.5f) width = 0.5f;
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unsigned int i = 0;
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for(; i<=numSteps; ++i)
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{
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float angle = float(osg::PI)*0.5f*(float(i)/float(numSteps));
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_vertices.push_back( osg::Vec2((1.0f-cosf(angle))*width, sinf(angle)) );
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}
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// start the second half one into the curve if the width is half way across
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i = width<0.5f ? 0 : 1;
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for(; i<=numSteps; ++i)
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{
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float angle = float(osg::PI)*0.5f*(float(numSteps-i)/float(numSteps));
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_vertices.push_back( osg::Vec2(1.0-(1.0f-cosf(angle))*width, sin(angle)) );
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}
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}
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void Bevel::roundedBevel2(float width, unsigned int numSteps)
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{
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_vertices.clear();
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if (width>0.5f) width = 0.5f;
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float h = 0.1f;
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float r = 1.0f-h;
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_vertices.push_back(osg::Vec2(0.0,0.0));
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unsigned int i = 0;
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for(; i<=numSteps; ++i)
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{
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float angle = float(osg::PI)*0.5f*(float(i)/float(numSteps));
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_vertices.push_back( osg::Vec2((1.0f-cosf(angle))*width, h + sinf(angle)*r) );
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}
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// start the second half one into the curve if the width is half way across
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i = width<0.5f ? 0 : 1;
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for(; i<=numSteps; ++i)
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{
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float angle = float(osg::PI)*0.5f*(float(numSteps-i)/float(numSteps));
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_vertices.push_back( osg::Vec2(1.0-(1.0f-cosf(angle))*width, h + sin(angle)*r) );
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}
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_vertices.push_back(osg::Vec2(1.0,0.0));
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}
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void Bevel::print(std::ostream& fout)
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{
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OSG_NOTICE<<"print bevel"<<std::endl;
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for(Vertices::iterator itr = _vertices.begin();
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itr != _vertices.end();
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++itr)
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{
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OSG_NOTICE<<" "<<*itr<<std::endl;
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}
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}
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/////////////////////////////////////////////////////////////////////////////////////////
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//
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// Style
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//
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Style::Style():
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_widthRatio(1.0f),
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_thicknessRatio(0.0f),
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_outlineRatio(0.0f),
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_sampleDensity(1.0f)
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{
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}
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Style::Style(const Style& style, const osg::CopyOp& copyop):
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osg::Object(style,copyop),
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_bevel(dynamic_cast<Bevel*>(copyop(style._bevel.get()))),
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_widthRatio(style._widthRatio),
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_thicknessRatio(style._thicknessRatio),
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_outlineRatio(style._outlineRatio),
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_sampleDensity(style._sampleDensity)
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{
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}
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/// default Layout implementation used if no other is specified on TextNode
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osg::ref_ptr<Style>& Style::getDefaultStyle()
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{
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static OpenThreads::Mutex s_DefaultStyleMutex;
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(s_DefaultStyleMutex);
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static osg::ref_ptr<Style> s_defaultStyle = new Style;
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return s_defaultStyle;
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}
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/////////////////////////////////////////////////////////////////////////////////////////
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//
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// Layout
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//
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Layout::Layout()
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{
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}
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Layout::Layout(const Layout& layout, const osg::CopyOp& copyop):
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osg::Object(layout,copyop)
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{
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}
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osg::ref_ptr<Layout>& Layout::getDefaultLayout()
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{
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static OpenThreads::Mutex s_DefaultLayoutMutex;
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(s_DefaultLayoutMutex);
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static osg::ref_ptr<Layout> s_defaultLayout = new Layout;
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return s_defaultLayout;
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}
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void Layout::layout(TextNode& text) const
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{
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OSG_NOTICE<<"Layout::layout"<<std::endl;
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Font* font = text.getActiveFont();
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Style* style = text.getActiveStyle();
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TextTechnique* technique = text.getTextTechnique();
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if (!text.getTextTechnique())
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{
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OSG_NOTICE<<"Warning: no TextTechnique assigned to Layout"<<std::endl;
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return;
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}
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technique->start();
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technique->finish();
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}
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/////////////////////////////////////////////////////////////////////////////////////////
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//
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// TextTechnique
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//
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TextTechnique::TextTechnique():
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_textNode(0)
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{
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}
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TextTechnique::TextTechnique(const TextTechnique& technique, const osg::CopyOp& copyop):
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osg::Object(technique, copyop),
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_textNode(0)
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{
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}
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osg::ref_ptr<TextTechnique>& TextTechnique::getDefaultTextTechinque()
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{
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static OpenThreads::Mutex s_DefaultTextTechniqueMutex;
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(s_DefaultTextTechniqueMutex);
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static osg::ref_ptr<TextTechnique> s_defaultTextTechnique = new TextTechnique;
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return s_defaultTextTechnique;
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}
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void TextTechnique::start()
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{
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OSG_NOTICE<<"TextTechnique::start()"<<std::endl;
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}
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void TextTechnique::addCharacter(const osg::Vec3& position, const osg::Vec3& size, Glyph* glyph, Style* style)
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{
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OSG_NOTICE<<"TextTechnique::addCharacter("<<position<<", "<<size<<", "<<glyph<<", "<<style<<")"<<std::endl;
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}
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void TextTechnique::finish()
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{
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OSG_NOTICE<<"TextTechnique::finish()"<<std::endl;
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}
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void TextTechnique::traverse(osg::NodeVisitor& nv)
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{
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OSG_NOTICE<<"TextTechnique::traverse()"<<std::endl;
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}
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/////////////////////////////////////////////////////////////////////////////////////////
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//
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// TextNode
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//
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TextNode::TextNode()
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{
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}
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TextNode::TextNode(const TextNode& text, const osg::CopyOp& copyop):
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osg::Group(text, copyop)
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{
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}
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TextNode::~TextNode()
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{
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setTextTechnique(0);
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}
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void TextNode::traverse(osg::NodeVisitor& nv)
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{
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if (_technique.valid())
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{
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_technique->traverse(nv);
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}
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else
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{
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Group::traverse(nv);
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}
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}
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void TextNode::setTextTechnique(TextTechnique* technique)
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{
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if (_technique==technique) return;
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if (TextTechnique::getDefaultTextTechinque()==technique)
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{
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OSG_NOTICE<<"Warning: Attempt to assign DefaultTextTechnique() prototype to TextNode::setTextTechnique(..), assigning a clone() of it instead."<<std::endl;
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technique = new TextTechnique(*TextTechnique::getDefaultTextTechinque());
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}
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if (_technique.valid()) _technique->setTextNode(0);
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_technique = technique;
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if (_technique.valid()) _technique->setTextNode(this);
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}
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void TextNode::update()
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{
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getActiveLayout()->layout(*this);
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}
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void TextNode::setText(const std::string& str)
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{
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_string.set(str);
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}
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