cool. I ll have a look later today and get back to you -Nick
On Thu, Jul 1, 2010 at 2:51 PM, Gianni Ambrosio <[email protected]> wrote: > Nick, here is a working code showing the label disappearing problem: > > > Code: > > #include <osgViewer/Viewer> > #include <osgText/Text> > #include <osg/LineWidth> > #include <osg/Geometry> > #include <osgGA/TrackballManipulator> > > osgText::Text* createAxisLabel(const std::string& iLabel, const osg::Vec3& > iPosition) > { > osgText::Text* text = new osgText::Text; > text->setFont("arial.ttf"); > text->setText(iLabel); > text->setPosition(iPosition); > text->setCharacterSize(17); > text->setAutoRotateToScreen(true); > text->setColor(osg::Vec4(204, 204, 0, 1)); > text->setCharacterSizeMode(osgText::Text::SCREEN_COORDS); > return text; > } > > osg::Geometry* createArrow(const osg::Matrixd& iTransform, const osg::Vec4& > iColor, double iHeight) > { > osg::Geometry* geometry = new osg::Geometry; > > double pyramidBaseZ = iHeight/3.0*2.0; > double outerBaseRadius = iHeight/9.0; > osg::Vec3Array* vertices = new osg::Vec3Array(7); > (*vertices)[0].set(iTransform.preMult(osg::Vec3d(outerBaseRadius, 0.0, > pyramidBaseZ))); > (*vertices)[1].set(iTransform.preMult(osg::Vec3d(0.0, outerBaseRadius, > pyramidBaseZ))); > (*vertices)[2].set(iTransform.preMult(osg::Vec3d(-outerBaseRadius, 0.0, > pyramidBaseZ))); > (*vertices)[3].set(iTransform.preMult(osg::Vec3d(0.0, -outerBaseRadius, > pyramidBaseZ))); > (*vertices)[4].set(iTransform.preMult(osg::Vec3d(0.0, 0.0, iHeight))); > (*vertices)[5].set(iTransform.preMult(osg::Vec3d(0.0, 0.0, iHeight))); > (*vertices)[6].set(iTransform.preMult(osg::Vec3d(0.0, 0.0, 0.0))); > > osg::UByteArray* indices = new osg::UByteArray(20); > (*indices)[0]=0; (*indices)[1]=1; (*indices)[2]=4; > (*indices)[3]=1; (*indices)[4]=2; (*indices)[5]=4; > (*indices)[6]=2; (*indices)[7]=3; (*indices)[8]=4; > (*indices)[9]=3; (*indices)[10]=0; (*indices)[11]=4; > (*indices)[12]=1; (*indices)[13]=0; (*indices)[14]=3; > (*indices)[15]=2; (*indices)[16]=1; (*indices)[17]=3; > (*indices)[18]=5; > (*indices)[19]=6; > > geometry->setVertexArray(vertices); > geometry->setVertexIndices(indices); > > osg::Vec4Array* colors = new osg::Vec4Array; > colors->push_back(iColor); > geometry->setColorArray(colors); > geometry->setColorBinding(osg::Geometry::BIND_OVERALL); > > geometry->addPrimitiveSet(new > osg::DrawArrays(osg::PrimitiveSet::TRIANGLES, 0, indices->size()-2)); > geometry->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::LINES, > indices->size()-2, 2)); > > return geometry; > } > > osg::Geometry* createXAxis(double iHeight) > { > osg::Matrixd transform = osg::Matrix::rotate(osg::inDegrees(90.0f), 0.0f, > 1.0f, 0.0f); > osg::Vec4 color(0.5f,0.125f,0.125f,1.0f); > osg::Geometry* geometry = createArrow(transform, color, iHeight); > return geometry; > } > > osg::Geometry* createYAxis(double iHeight) > { > osg::Matrixd transform = osg::Matrix::rotate(osg::inDegrees(-90.0f), > 1.0f, 0.0f, 0.0f); > osg::Vec4 color(0.125f,0.5f,0.125f,1.0f); > osg::Geometry* geometry = createArrow(transform, color, iHeight); > return geometry; > } > > osg::Geometry* createZAxis(double iHeight) > { > osg::Matrixd transform = osg::Matrix::identity(); > osg::Vec4 color(0.125f,0.125f,0.5f,1.0f); > osg::Geometry* geometry = createArrow(transform, color, iHeight); > return geometry; > } > > osg::Geode* createAxesGeometry() > { > osg::Geode* geode = new osg::Geode; > > osg::LineWidth* lineWidth = new osg::LineWidth(2); > geode->getOrCreateStateSet()->setAttributeAndModes(lineWidth, > osg::StateAttribute::ON); > geode->getOrCreateStateSet()->setMode(GL_LIGHTING, > osg::StateAttribute::OFF); > > double length = 70.0; > geode->addDrawable(createXAxis(length)); > geode->addDrawable(createYAxis(length)); > geode->addDrawable(createZAxis(length)); > geode->addDrawable(createAxisLabel("X", osg::Vec3(length*1.05, 0, 0))); > geode->addDrawable(createAxisLabel("Y", osg::Vec3(0, length*1.05, 0))); > geode->addDrawable(createAxisLabel("Z", osg::Vec3(0, 0, length*1.05))); > > return geode; > } > > class AxisCameraUpdateCallback:public osg::NodeCallback > { > public: > virtual void operator()(osg::Node* node, osg::NodeVisitor* nv) > { > if(nv->getVisitorType() == osg::NodeVisitor::UPDATE_VISITOR) > { > osg::Camera* camera = dynamic_cast<osg::Camera*>(node); > if (camera) > { > osg::View* view = camera->getView(); > if (view && view->getNumSlaves() > 0) > { > osg::View::Slave* slave = &view->getSlave(0); > if(slave->_camera.get() == camera) > { > osg::Camera* masterCam = view->getCamera(); > osg::Vec3 eye, center, up; > masterCam->getViewMatrixAsLookAt(eye, center, up, 30); > osg::Matrixd matrix; > matrix.makeLookAt(eye-center, osg::Vec3(0, 0, 0), up); // > always look at (0, 0, 0) > camera->setViewMatrix(matrix); > } > } > } > } > traverse(node,nv); > } > }; > > osg::Camera* createHUD() > { > osg::Camera* camera = new osg::Camera; > camera->setProjectionMatrix(osg::Matrix::ortho2D(-80, 1280-80, -80, > 1024-80)); > camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF); > camera->setClearMask(GL_DEPTH_BUFFER_BIT); > camera->setRenderOrder(osg::Camera::POST_RENDER); > camera->setUpdateCallback(new AxisCameraUpdateCallback); > > osg::Geode* geode = createAxesGeometry(); > camera->addChild(geode); > > return camera; > } > > int main( int argc, char **argv ) > { > osgViewer::Viewer viewer; > osg::Group* root = new osg::Group; > osg::Camera* camera = createHUD(); > viewer.addSlave(camera, false); > root->addChild(camera); > viewer.setSceneData(root); > viewer.setCameraManipulator(new osgGA::TrackballManipulator); > return viewer.run(); > } > > > > > Regards > Gianni > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=29584#29584 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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