OpenSceneGraph/examples/osgslideshow/DefaultPresentation.cpp

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#include <osgDB/ReadFile>
#include <osg/Switch>
#include <osg/Texture2D>
#include <osg/MatrixTransform>
#include <osg/Quat>
#include <osg/Geometry>
#include <osg/Geode>
osg::MatrixTransform* createPositionedAndScaledModel(osg::Node* model,const osg::Vec3& pos, float radius, osg::Quat rotation)
{
osg::MatrixTransform* transform = new osg::MatrixTransform;
const osg::BoundingSphere& bs = model->getBound();
transform->setDataVariance(osg::Object::STATIC);
transform->setMatrix(osg::Matrix::translate(-bs.center())*
osg::Matrix::scale(radius/bs.radius(),radius/bs.radius(),radius/bs.radius())*
osg::Matrix::rotate(rotation)*
osg::Matrix::translate(pos));
transform->addChild(model);
return transform;
}
osg::Node* createDefaultPresentation()
{
osg::Switch* presentation = new osg::Switch;
presentation->setName("Presentation default");
float width = 1280.0f;
float height = 1024.0f;
osg::Geometry* backgroundQuad = osg::createTexturedQuadGeometry(osg::Vec3(0.0f,0.0f,0.0f),
osg::Vec3(width,0.0f,0.0f),
osg::Vec3(0.0f,0.0f,height));
osg::Geode* background = new osg::Geode;
background->getOrCreateStateSet()->setTextureAttributeAndModes(0,
new osg::Texture2D(osgDB::readImageFile("lz.rgb")),
osg::StateAttribute::ON);
background->addDrawable(backgroundQuad);
osg::Geode* background2 = new osg::Geode;
background2->getOrCreateStateSet()->setTextureAttributeAndModes(0,
new osg::Texture2D(osgDB::readImageFile("reflect.rgb")),
osg::StateAttribute::ON);
background2->addDrawable(backgroundQuad);
{
osg::Switch* slide = new osg::Switch;
slide->setName("Slide 0");
{
osg::Group* group = new osg::Group;
group->setName("Layer 0");
group->addChild(background);
slide->addChild(group);
}
{
osg::Group* group = new osg::Group;
group->setName("Layer 1");
group->addChild(background2);
slide->addChild(group);
}
{
osg::Group* group = new osg::Group;
group->setName("Layer 2");
group->addChild(background);
group->addChild(createPositionedAndScaledModel(osgDB::readNodeFile("cow.osg"),
osg::Vec3(600.0f,0.0f,600.0f),500.0f,
osg::Quat()));
slide->addChild(group);
}
presentation->addChild(slide);
}
{
osg::Switch* slide = new osg::Switch;
slide->setName("Slide 1");
{
osg::Group* group = new osg::Group;
group->setName("Layer 0");
group->addChild(background);
group->addChild(createPositionedAndScaledModel(osgDB::readNodeFile("glider.osg"),
osg::Vec3(600.0f,0.0f,600.0f),500.0f,
osg::Quat()));
slide->addChild(group);
}
{
osg::Group* group = new osg::Group;
group->setName("Layer 1");
group->addChild(background2);
group->addChild(createPositionedAndScaledModel(osgDB::readNodeFile("Town.osg"),
osg::Vec3(600.0f,0.0f,600.0f),500.0f,
osg::Quat()));
slide->addChild(group);
}
presentation->addChild(slide);
}
return presentation;
}