329 lines
11 KiB
C++
329 lines
11 KiB
C++
/* OpenSceneGraph example, osgautotransform.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <osgUtil/Optimizer>
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#include <osgDB/ReadFile>
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#include <osgGA/TrackballManipulator>
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#include <osgViewer/ViewerEventHandlers>
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#include <osgViewer/CompositeViewer>
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#include <osg/Material>
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#include <osg/Geode>
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#include <osg/BlendFunc>
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#include <osg/Depth>
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#include <osg/Projection>
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#include <osg/AutoTransform>
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#include <osg/Geometry>
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#include <osgDB/WriteFile>
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#include <osgText/Text>
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#include <iostream>
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osg::Node* createLabel(const osg::Vec3& pos, float size, const std::string& label, osgText::Text::AxisAlignment axisAlignment)
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{
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osg::Geode* geode = new osg::Geode();
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std::string timesFont("fonts/arial.ttf");
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{
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osgText::Text* text = new osgText::Text;
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geode->addDrawable( text );
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text->setFont(timesFont);
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text->setPosition(pos);
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text->setCharacterSize(size);
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text->setAxisAlignment(axisAlignment);
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text->setAlignment(osgText::Text::CENTER_CENTER);
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text->setText(label);
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}
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return geode;
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}
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osg::Node* createLabel3(const osg::Vec3& pos, float size, const std::string& label)
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{
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osg::Geode* geode = new osg::Geode();
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std::string timesFont("fonts/arial.ttf");
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{
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osgText::Text* text = new osgText::Text;
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geode->addDrawable( text );
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text->setFont(timesFont);
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text->setPosition(pos);
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text->setFontResolution(40,40);
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text->setCharacterSize(size);
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text->setAlignment(osgText::Text::CENTER_CENTER);
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text->setAutoRotateToScreen(true);
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text->setCharacterSizeMode(osgText::Text::OBJECT_COORDS_WITH_MAXIMUM_SCREEN_SIZE_CAPPED_BY_FONT_HEIGHT);
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text->setText(label);
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}
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return geode;
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}
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osg::Node* createAxis(const osg::Vec3& s, const osg::Vec3& e, int numReps, osg::AutoTransform::AutoRotateMode autoRotateMode, osgText::Text::AxisAlignment axisAlignment, const std::string& str)
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{
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osg::Group* group = new osg::Group;
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osg::Vec3 dv = e-s;
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dv /= float(numReps-1);
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osg::Vec3 pos = s;
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bool useAuto = true;
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if (useAuto)
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{
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osg::Vec3Array* vertices = new osg::Vec3Array;
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for(int i=0;i<numReps;++i)
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{
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osg::AutoTransform* at = new osg::AutoTransform;
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at->setPosition(pos);
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at->setAutoRotateMode(autoRotateMode);
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at->addChild(createLabel(osg::Vec3(0.0f,0.0f,0.0f),dv.length()*0.2f,str, axisAlignment));
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vertices->push_back(pos);
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pos += dv;
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group->addChild(at);
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}
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osg::Vec4Array* colors = new osg::Vec4Array;
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colors->push_back(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
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osg::Geometry* geom = new osg::Geometry;
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geom->setVertexArray(vertices);
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geom->setColorArray(colors, osg::Array::BIND_OVERALL);
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geom->addPrimitiveSet(new osg::DrawArrays(GL_LINE_STRIP,0,vertices->size()));
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osg::Geode* geode = new osg::Geode;
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geode->addDrawable(geom);
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group->addChild(geode);
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}
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else
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{
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osg::Vec3Array* vertices = new osg::Vec3Array;
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for(int i=0;i<numReps;++i)
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{
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group->addChild(createLabel3(osg::Vec3(pos),dv.length()*0.5f,str));
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vertices->push_back(pos);
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pos += dv;
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}
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osg::Vec4Array* colors = new osg::Vec4Array;
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colors->push_back(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
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osg::Geometry* geom = new osg::Geometry;
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geom->setVertexArray(vertices);
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geom->setColorArray(colors, osg::Array::BIND_OVERALL);
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geom->addPrimitiveSet(new osg::DrawArrays(GL_LINE_STRIP,0,vertices->size()));
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osg::Geode* geode = new osg::Geode;
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geode->addDrawable(geom);
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group->addChild(geode);
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}
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return group;
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}
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osg::Node* createAutoScale(const osg::Vec3& position, float characterSize, const std::string& message, float minScale=0.0, float maxScale=FLT_MAX)
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{
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std::string timesFont("fonts/arial.ttf");
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osgText::Text* text = new osgText::Text;
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text->setCharacterSize(characterSize);
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text->setText(message);
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text->setFont(timesFont);
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text->setAlignment(osgText::Text::CENTER_CENTER);
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osg::Geode* geode = new osg::Geode;
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geode->addDrawable(text);
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geode->getOrCreateStateSet()->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
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osg::AutoTransform* at = new osg::AutoTransform;
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at->addChild(geode);
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at->setAutoRotateMode(osg::AutoTransform::ROTATE_TO_SCREEN);
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at->setAutoScaleToScreen(true);
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at->setMinimumScale(minScale);
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at->setMaximumScale(maxScale);
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at->setPosition(position);
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return at;
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}
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osg::Node* createScene()
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{
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osg::Group* root = new osg::Group;
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// int numReps = 3333;
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int numReps = 10;
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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"));
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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"));
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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"));
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root->addChild(createAutoScale(osg::Vec3(500.0,500.0,500.0), 25.0, "AutoScale with no min, max limits"));
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root->addChild(createAutoScale(osg::Vec3(500.0,500.0,300.0), 25.0, "AutoScale with minScale = 1, maxScale = 2.0 ", 1, 2.0));
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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));
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return root;
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}
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osgViewer::View* createView(osg::ref_ptr<osg::Node> scenegraph, osg::ref_ptr<osg::GraphicsContext> gc, unsigned int x, unsigned int y, unsigned int width, unsigned int height)
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{
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OSG_NOTICE<<"createView(....,x="<<x<<", y="<<y<<", width="<<width<<", height="<<height<<")"<<std::endl;
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if (!gc)
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{
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osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
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traits->x = x;
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traits->y = y;
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traits->width = width;
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traits->height = height;
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traits->windowDecoration = true;
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traits->doubleBuffer = true;
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traits->sharedContext = 0;
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traits->readDISPLAY();
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traits->setUndefinedScreenDetailsToDefaultScreen();
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gc = osg::GraphicsContext::createGraphicsContext(traits.get());
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if (!gc)
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{
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osg::notify(osg::NOTICE)<<" GraphicsWindow has not been created successfully."<<std::endl;
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return 0;
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}
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x = 0;
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y = 0;
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}
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osgViewer::View* view = new osgViewer::View;
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view->getCamera()->setGraphicsContext(gc.get());
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view->getCamera()->setViewport(new osg::Viewport(x, y, width, height));
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//view->getCamera()->setProjectionMatrixAsPerspective(30.0, double(width) / double(height), 1.0, 1000.0);
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view->setCameraManipulator(new osgGA::TrackballManipulator);
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view->setSceneData(scenegraph);
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return view;
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}
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int main(int argc, char** argv)
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{
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osg::ArgumentParser arguments(&argc, argv);
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// construct the viewer.
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osgViewer::CompositeViewer viewer(arguments);
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// create the scene graph that contains osg::AutoTransform nodes, see about for implementation details
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osg::ref_ptr<osg::Node> scenegraph = createScene();
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unsigned int numViews = 1;
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while (arguments.read("-n",numViews)) {}
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bool windows = false;
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while (arguments.read("-w")) { windows = true; }
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if (numViews<=1)
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{
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osgViewer::View* view = new osgViewer::View;
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view->setUpViewAcrossAllScreens();
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view->setSceneData(scenegraph.get());
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view->setCameraManipulator(new osgGA::TrackballManipulator);
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view->addEventHandler( new osgViewer::StatsHandler );
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viewer.addView(view);
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}
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else
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{
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osg::GraphicsContext::WindowingSystemInterface* wsi = osg::GraphicsContext::getWindowingSystemInterface();
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if (!wsi)
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{
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osg::notify(osg::NOTICE)<<"Error, no WindowSystemInterface available, cannot create windows."<<std::endl;
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return 1;
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}
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unsigned int width, height;
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osg::GraphicsContext::ScreenIdentifier main_screen_id;
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main_screen_id.readDISPLAY();
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main_screen_id.setUndefinedScreenDetailsToDefaultScreen();
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wsi->getScreenResolution(main_screen_id, width, height);
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unsigned int x=0, y=0;
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while(arguments.read("--window", x, y, width, height)) {}
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osg::ref_ptr<osg::GraphicsContext> gc;
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if (!windows)
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{
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osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
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traits->x = x;
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traits->y = y;
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traits->width = width;
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traits->height = height;
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traits->windowDecoration = true;
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traits->doubleBuffer = true;
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traits->sharedContext = 0;
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traits->readDISPLAY();
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traits->setUndefinedScreenDetailsToDefaultScreen();
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gc = osg::GraphicsContext::createGraphicsContext(traits.get());
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if (!gc)
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{
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osg::notify(osg::NOTICE)<<" GraphicsWindow has not been created successfully."<<std::endl;
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return 1;
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}
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}
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if (numViews==2)
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{
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viewer.addView(createView(scenegraph, gc, 0, 0, width/2, height));
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viewer.addView(createView(scenegraph, gc, width/2, 0, width/2, height));
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}
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else if (numViews==3)
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{
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viewer.addView(createView(scenegraph, gc, 0, 0, width/2, height/2));
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viewer.addView(createView(scenegraph, gc, width/2, 0, width/2, height/2));
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viewer.addView(createView(scenegraph, gc, 0, height/2, width, height/2));
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}
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else
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{
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viewer.addView(createView(scenegraph, gc, 0, 0, width/2, height/2));
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viewer.addView(createView(scenegraph, gc, width/2, 0, width/2, height/2));
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viewer.addView(createView(scenegraph, gc, 0, height/2, width/2, height/2));
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viewer.addView(createView(scenegraph, gc, width/2, height/2, width/2, height/2));
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}
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viewer.getView(0)->addEventHandler( new osgViewer::StatsHandler );
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}
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// run the viewers frame loop
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return viewer.run();
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}
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