64 lines
1.7 KiB
C++
64 lines
1.7 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 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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#ifndef OSGTEXT_FADETEXT
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#define OSGTEXT_FADETEXT 1
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#include <osgText/Text>
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namespace osgText {
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class OSGTEXT_EXPORT FadeText : public osgText::Text
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{
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public:
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FadeText();
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FadeText(const Text& text,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
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META_Object(osgText,FadeText)
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/** Set the speed that the alpha value changes as the text is occluded or becomes visible.*/
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void setFadeSpeed(float fadeSpeed) { _fadeSpeed = fadeSpeed; }
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/** Get the speed that the alpha value changes.*/
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float getFadeSpeed() const { return _fadeSpeed; }
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/** Draw the text.*/
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virtual void drawImplementation(osg::RenderInfo& renderInfo) const;
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protected:
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virtual ~FadeText() {}
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void init();
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struct FadeTextUpdateCallback;
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friend struct FadeTextUpdateCallback;
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typedef std::map<osg::View*, osg::Vec4 > ViewBlendColourMap;
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ViewBlendColourMap& getViewBlendColourMap() { return _viewBlendColourMap; }
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const ViewBlendColourMap& getViewBlendColourMap() const { return _viewBlendColourMap; }
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float _fadeSpeed;
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mutable ViewBlendColourMap _viewBlendColourMap;
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};
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}
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#endif
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