Added XML support and slideshow constructor to slideshow3D example, now
renamed from the previous osgslideshow.
This commit is contained in:
Robert Osfield
262
examples/slideshow3D/SlideShowConstructor.cpp
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262
examples/slideshow3D/SlideShowConstructor.cpp
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#include "SlideShowConstructor.h"
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#include <osg/Geometry>
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#include <osg/PolygonOffset>
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#include <osg/Geode>
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#include <osg/Texture2D>
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#include <osg/MatrixTransform>
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#include <osgDB/ReadFile>
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#include <osgText/Text>
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SlideShowConstructor::SlideShowConstructor()
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{
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_slideOrigin.set(0.0f,0.0f,0.0f);
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_slideWidth = 1280.0f;
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_slideHeight = 1024.0f;
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_backgroundColor.set(0.0f,0.0f,0.0f,1.0f);
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_textColor.set(1.0f,1.0f,1.0f,1.0f);
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_textFont = "fonts/arial.ttf";
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}
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void SlideShowConstructor::createPresentation()
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{
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_titleHeight = _slideHeight*0.08f;
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_titleOrigin = _slideOrigin + osg::Vec3(_slideWidth*0.5f,0.0f,_slideHeight*0.98f-_titleHeight);
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_textHeight = _slideHeight*0.05f;
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_textOrigin = _slideOrigin + osg::Vec3(_slideWidth*0.1f,0.0f,_titleOrigin.z()-2*_textHeight);
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_imageOrigin = _slideOrigin + osg::Vec3(_slideWidth*0.7f,0.0f,_titleOrigin.z()*0.5f);
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_modelLeft = _slideOrigin + osg::Vec3(_slideWidth*0.0f,0.0f,_titleOrigin.z()*0.5f);
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_modelRight = _slideOrigin + osg::Vec3(_slideWidth*1.0f,0.0f,_titleOrigin.z()*0.5f);
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_root = new osg::ClearNode;
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_root->setClearColor(_backgroundColor);
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_presentationSwitch = new osg::Switch;
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_presentationSwitch->setName(std::string("Presentation_")+_presentationName);
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_root->addChild(_presentationSwitch.get());
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}
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void SlideShowConstructor::setBackgroundColor(const osg::Vec4& color)
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{
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_backgroundColor = color;
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if (_root.valid()) _root->setClearColor(_backgroundColor);
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}
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void SlideShowConstructor::setTextColor(const osg::Vec4& color)
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{
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_textColor = color;
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}
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void SlideShowConstructor::setPresentationName(const std::string& name)
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{
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_presentationName = name;
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if (_presentationSwitch.valid()) _presentationSwitch->setName(std::string("Presentation_")+_presentationName);
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}
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void SlideShowConstructor::addSlide()
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{
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if (!_presentationSwitch) createPresentation();
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// reset cursors
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_textCursor = _textOrigin;
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_imageCursor = _imageOrigin;
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_modelCursor = _modelLeft*0.5f + _modelRight*0.5f;
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_slide = new osg::Switch;
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_slide->setName(std::string("Slide_")+_slideTitle);
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_presentationSwitch->addChild(_slide.get());
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_previousLayer = 0;
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_currentLayer = 0;
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}
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void SlideShowConstructor::addLayer()
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{
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if (!_slide) addSlide();
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_previousLayer = _currentLayer;
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_currentLayer = new osg::Group;
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_slide->addChild(_currentLayer.get());
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if (!_previousLayer)
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{
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// create the background and title..
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if (!_slideBackgroundImageFileName.empty())
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{
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osg::Geometry* backgroundQuad = osg::createTexturedQuadGeometry(_slideOrigin,
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osg::Vec3(_slideWidth,0.0f,0.0f),
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osg::Vec3(0.0f,0.0f,_slideHeight));
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osg::Geode* background = new osg::Geode;
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osg::StateSet* backgroundStateSet = background->getOrCreateStateSet();
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backgroundStateSet->setAttributeAndModes(
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new osg::PolygonOffset(1.0f,1.0f),
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osg::StateAttribute::ON);
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backgroundStateSet->setTextureAttributeAndModes(0,
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new osg::Texture2D(osgDB::readImageFile(_slideBackgroundImageFileName)),
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osg::StateAttribute::ON);
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background->addDrawable(backgroundQuad);
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_currentLayer->addChild(background);
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}
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if (!_slideTitle.empty())
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{
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osg::Geode* geode = new osg::Geode;
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osgText::Text* text = new osgText::Text;
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text->setFont(_textFont);
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text->setColor(_textColor);
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text->setCharacterSize(_titleHeight);
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text->setAxisAlignment(osgText::Text::XZ_PLANE);
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text->setAlignment(osgText::Text::CENTER_BASE_LINE);
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text->setPosition(_titleOrigin);
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text->setText(_slideTitle);
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geode->addDrawable(text);
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_currentLayer->addChild(geode);
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}
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}
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else
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{
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// copy previous layer's children across into new layer.
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for(unsigned int i=0;i<_previousLayer->getNumChildren();++i)
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{
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_currentLayer->addChild(_previousLayer->getChild(i));
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}
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}
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}
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void SlideShowConstructor::addBullet(const std::string& bullet)
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{
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if (!_currentLayer) addLayer();
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osg::Geode* geode = new osg::Geode;
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osgText::Text* text = new osgText::Text;
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text->setFont(_textFont);
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text->setColor(_textColor);
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text->setCharacterSize(_textHeight);
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text->setAxisAlignment(osgText::Text::XZ_PLANE);
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text->setAlignment(osgText::Text::BASE_LINE);
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text->setPosition(_textCursor);
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text->setText(bullet);
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osg::BoundingBox bb = text->getBound();
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_textCursor.z() = bb.zMin()-_textHeight;
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geode->addDrawable(text);
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_currentLayer->addChild(geode);
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}
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void SlideShowConstructor::addParagraph(const std::string& paragraph)
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{
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if (!_currentLayer) addLayer();
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osg::Geode* geode = new osg::Geode;
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osgText::Text* text = new osgText::Text;
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text->setFont(_textFont);
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text->setColor(_textColor);
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text->setCharacterSize(_textHeight);
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text->setAxisAlignment(osgText::Text::XZ_PLANE);
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text->setAlignment(osgText::Text::BASE_LINE);
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text->setPosition(_textCursor);
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text->setText(paragraph);
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osg::BoundingBox bb = text->getBound();
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_textCursor.z() = bb.zMin()-_textHeight;
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geode->addDrawable(text);
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_currentLayer->addChild(geode);
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}
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void SlideShowConstructor::addImage(const std::string& filename,float height)
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{
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if (!_currentLayer) addLayer();
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osg::Image* image = osgDB::readImageFile(filename);
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if (!image) return;
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float s = image->s();
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float t = image->t();
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float image_height = _slideHeight*0.6f;
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float image_width = image_height*s/t;
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osg::Vec3 pos = _imageCursor + osg::Vec3(-image_width*0.5f,-height*image_height*0.1f,-image_height*0.5f);
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osg::Geometry* backgroundQuad = osg::createTexturedQuadGeometry(pos,
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osg::Vec3(image_width,0.0f,0.0f),
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osg::Vec3(0.0f,0.0f,image_height));
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osg::Geode* background = new osg::Geode;
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osg::StateSet* backgroundStateSet = background->getOrCreateStateSet();
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backgroundStateSet->setTextureAttributeAndModes(0,
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new osg::Texture2D(image),
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osg::StateAttribute::ON);
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background->addDrawable(backgroundQuad);
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_currentLayer->addChild(background);
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}
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void SlideShowConstructor::addModel(const std::string& filename,float scale,float rotation,float position)
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{
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if (!_currentLayer) addLayer();
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osg::Node* model = osgDB::readNodeFile(filename);
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if (!model) return;
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osg::Vec3 pos = _modelLeft*(1.0f-position) + _modelRight*position;
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float radius = scale*_slideHeight*0.7f;
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osg::Quat quat;
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quat.makeRotate(osg::DegreesToRadians(rotation),0.0f,0.0f,1.0f);
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osg::MatrixTransform* transform = new osg::MatrixTransform;
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const osg::BoundingSphere& bs = model->getBound();
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transform->setDataVariance(osg::Object::STATIC);
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transform->setMatrix(osg::Matrix::translate(-bs.center())*
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osg::Matrix::scale(radius/bs.radius(),radius/bs.radius(),radius/bs.radius())*
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osg::Matrix::rotate(quat)*
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osg::Matrix::translate(pos));
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transform->addChild(model);
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_currentLayer->addChild(transform);
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}
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