FGFS-4.1/OpenSceneGraph
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Added example code showing how to set the minimum and maximum scales

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This commit is contained in:
Robert Osfield 2008-03-18 10:45:47 +00:00
parent e74bb067fb
commit b08f438946
1 changed files with 30 additions and 1 deletions
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31
examples/osgautotransform/osgautotransform.cpp
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@ -149,6 +149,32 @@ osg::Node* createAxis(const osg::Vec3& s, const osg::Vec3& e, int numReps, osg::
return group;
}
osg::Node* createAutoScale(const osg::Vec3& position, float characterSize, const std::string& message, float minScale=0.0, float maxScale=FLT_MAX)
{
std::string timesFont("fonts/arial.ttf");
osgText::Text* text = new osgText::Text;
text->setCharacterSize(characterSize);
text->setText(message);
text->setFont(timesFont);
text->setAlignment(osgText::Text::CENTER_CENTER);
osg::Geode* geode = new osg::Geode;
geode->addDrawable(text);
geode->getOrCreateStateSet()->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
osg::AutoTransform* at = new osg::AutoTransform;
at->addChild(geode);
at->setAutoRotateMode(osg::AutoTransform::ROTATE_TO_SCREEN);
at->setAutoScaleToScreen(true);
at->setMinimumScale(minScale);
at->setMaximumScale(maxScale);
at->setPosition(position);
return at;
}
osg::Node* createScene()
{
osg::Group* root = new osg::Group;
@ -158,7 +184,10 @@ osg::Node* createScene()
root->addChild(createAxis(osg::Vec3(0.0,0.0,0.0),osg::Vec3(1000.0,0.0,0.0),numReps,osg::AutoTransform::ROTATE_TO_CAMERA,osgText::Text::XY_PLANE, "ROTATE_TO_CAMERA"));
root->addChild(createAxis(osg::Vec3(0.0,0.0,0.0),osg::Vec3(0.0,1000.0,0.0),numReps,osg::AutoTransform::ROTATE_TO_SCREEN,osgText::Text::XY_PLANE, "ROTATE_TO_SCREEN"));
root->addChild(createAxis(osg::Vec3(0.0,0.0,0.0),osg::Vec3(0.0,0.0,1000.0),numReps,osg::AutoTransform::NO_ROTATION,osgText::Text::XZ_PLANE, "NO_ROTATION"));
root->addChild(createAutoScale(osg::Vec3(500.0,500.0,500.0), 25.0, "AutoScale with no min, max limits"));
root->addChild(createAutoScale(osg::Vec3(500.0,500.0,300.0), 25.0, "AutoScale with minScale = 1, maxScale = 2.0 ", 1, 2.0));
root->addChild(createAutoScale(osg::Vec3(500.0,500.0,700.0), 25.0, "AutoScale with minScale = 0.0, maxScale = 5.0 ", 0.0, 5.0));
return root;
}