772 lines
28 KiB
C++
772 lines
28 KiB
C++
/* OpenSceneGraph example, osgspheresegment.
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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 <osgViewer/Viewer>
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#include <osgViewer/ViewerEventHandlers>
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#include <osg/Group>
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#include <osg/Geode>
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#include <osg/ShapeDrawable>
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#include <osg/Texture2D>
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#include <osg/PositionAttitudeTransform>
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#include <osg/MatrixTransform>
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#include <osg/Geometry>
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#include <osgUtil/SmoothingVisitor>
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#include <osgDB/ReadFile>
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#include <osgText/Text>
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#include <osgSim/SphereSegment>
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#include <osgSim/OverlayNode>
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#include <osgParticle/ExplosionEffect>
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#include <osgParticle/SmokeEffect>
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#include <osgParticle/FireEffect>
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#include <osgParticle/ParticleSystemUpdater>
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#include <osg/io_utils>
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#include <iostream>
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// for the grid data..
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#include "../osghangglide/terrain_coords.h"
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osg::AnimationPath* createAnimationPath(const osg::Vec3& center,float radius,double looptime)
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{
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// set up the animation path
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osg::AnimationPath* animationPath = new osg::AnimationPath;
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animationPath->setLoopMode(osg::AnimationPath::LOOP);
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int numSamples = 40;
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float yaw = 0.0f;
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float yaw_delta = 2.0f*osg::PI/((float)numSamples-1.0f);
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float roll = osg::inDegrees(30.0f);
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double time=0.0f;
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double time_delta = looptime/(double)numSamples;
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for(int i=0;i<numSamples;++i)
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{
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osg::Vec3 position(center+osg::Vec3(sinf(yaw)*radius,cosf(yaw)*radius,0.0f));
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osg::Quat rotation(osg::Quat(roll,osg::Vec3(0.0,1.0,0.0))*osg::Quat(-(yaw+osg::inDegrees(90.0f)),osg::Vec3(0.0,0.0,1.0)));
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animationPath->insert(time,osg::AnimationPath::ControlPoint(position,rotation));
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yaw += yaw_delta;
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time += time_delta;
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}
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return animationPath;
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}
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class IntersectionUpdateCallback : public osg::NodeCallback
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{
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virtual void operator()(osg::Node* /*node*/, osg::NodeVisitor* nv)
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{
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if (!root_ || !terrain_ || !ss_ || !intersectionGroup_)
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{
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osg::notify(osg::NOTICE)<<"IntersectionUpdateCallback not set up correctly."<<std::endl;
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return;
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}
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//traverse(node,nv);
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frameCount_++;
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if (frameCount_ > 200)
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{
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// first we need find the transformation matrix that takes
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// the terrain into the coordinate frame of the sphere segment.
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osg::Matrixd terrainLocalToWorld;
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osg::MatrixList terrain_worldMatrices = terrain_->getWorldMatrices(root_.get());
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if (terrain_worldMatrices.empty()) terrainLocalToWorld.makeIdentity();
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else if (terrain_worldMatrices.size()==1) terrainLocalToWorld = terrain_worldMatrices.front();
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else
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{
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osg::notify(osg::NOTICE)<<"IntersectionUpdateCallback: warning cannot interestect with multiple terrain instances, just uses first one."<<std::endl;
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terrainLocalToWorld = terrain_worldMatrices.front();
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}
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// sphere segment is easier as this callback is attached to the node, so the node visitor has the unique path to it already.
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osg::Matrixd ssWorldToLocal = osg::computeWorldToLocal(nv->getNodePath());
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// now we can compute the terrain to ss transform
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osg::Matrixd possie = terrainLocalToWorld*ssWorldToLocal;
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osgSim::SphereSegment::LineList lines = ss_->computeIntersection(possie, terrain_.get());
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if (!lines.empty())
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{
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if (intersectionGroup_.valid())
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{
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// now we need to place the intersections which are in the SphereSegmenet's coordinate frame into
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// to the final position.
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osg::MatrixTransform* mt = new osg::MatrixTransform;
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mt->setMatrix(osg::computeLocalToWorld(nv->getNodePath()));
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intersectionGroup_->addChild(mt);
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// std::cout<<"matrix = "<<mt->getMatrix()<<std::endl;
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osg::Geode* geode = new osg::Geode;
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mt->addChild(geode);
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geode->getOrCreateStateSet()->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
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for(osgSim::SphereSegment::LineList::iterator itr=lines.begin();
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itr!=lines.end();
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++itr)
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{
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osg::Geometry* geom = new osg::Geometry;
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geode->addDrawable(geom);
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osg::Vec3Array* vertices = itr->get();
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geom->setVertexArray(vertices);
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geom->addPrimitiveSet(new osg::DrawArrays(GL_LINE_STRIP, 0, vertices->getNumElements()));
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}
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}
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}
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else
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{
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osg::notify(osg::NOTICE)<<"No intersections found"<<std::endl;
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}
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frameCount_ = 0;
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}
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}
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public:
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osg::observer_ptr<osg::Group> root_;
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osg::observer_ptr<osg::Geode> terrain_;
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osg::observer_ptr<osgSim::SphereSegment> ss_;
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osg::observer_ptr<osg::Group> intersectionGroup_;
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unsigned frameCount_;
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};
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class RotateUpdateCallback : public osg::NodeCallback
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{
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public:
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RotateUpdateCallback() { i=0;}
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virtual void operator()(osg::Node* node, osg::NodeVisitor* /*nv*/)
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{
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osgSim::SphereSegment * ss = dynamic_cast<osgSim::SphereSegment *>(node);
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if (ss)
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{
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ss->setArea(osg::Vec3(cos(i/(2*osg::PI)),sin(i/(2*osg::PI)),0), osg::PI_2, osg::PI_2);
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i += 0.1f;
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}
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}
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protected:
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float i;
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};
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osg::Node* createMovingModel(const osg::Vec3& center, float radius, osg::Geode * terrainGeode, osg::Group * root, bool createMovingRadar = false)
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{
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float animationLength = 10.0f;
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osg::AnimationPath* animationPath = createAnimationPath(center,radius,animationLength);
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osg::Group* model = new osg::Group;
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osg::ref_ptr<osg::Node> glider = osgDB::readRefNodeFile("glider.osgt");
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if (glider)
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{
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const osg::BoundingSphere& bs = glider->getBound();
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float size = radius/bs.radius()*0.3f;
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osg::MatrixTransform* positioned = new osg::MatrixTransform;
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positioned->setDataVariance(osg::Object::STATIC);
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positioned->setMatrix(osg::Matrix::translate(-bs.center())*
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osg::Matrix::scale(size,size,size)*
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osg::Matrix::rotate(osg::inDegrees(-90.0f),0.0f,0.0f,1.0f));
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positioned->addChild(glider);
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osg::PositionAttitudeTransform* xform = new osg::PositionAttitudeTransform;
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xform->getOrCreateStateSet()->setMode(GL_NORMALIZE, osg::StateAttribute::ON);
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xform->setUpdateCallback(new osg::AnimationPathCallback(animationPath,0.0,1.0));
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xform->addChild(positioned);
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model->addChild(xform);
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}
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if (createMovingRadar)
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{
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// The IntersectionUpdateCallback has to have a safe place to put all its generated geometry into,
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// and this group can't be in the parental chain of the callback otherwise we will end up invalidating
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// traversal iterators.
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osg::Group* intersectionGroup = new osg::Group;
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root->addChild(intersectionGroup);
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osg::PositionAttitudeTransform* xform = new osg::PositionAttitudeTransform;
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xform->setUpdateCallback(new osg::AnimationPathCallback(animationPath,0.0,1.0));
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osgSim::SphereSegment * ss = new osgSim::SphereSegment(osg::Vec3d(0.0,0.0,0.0),
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700.0f, // radius
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osg::DegreesToRadians(135.0f),
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osg::DegreesToRadians(240.0f),
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osg::DegreesToRadians(-60.0f),
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osg::DegreesToRadians(-40.0f),
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60);
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IntersectionUpdateCallback * iuc = new IntersectionUpdateCallback;
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iuc->frameCount_ = 0;
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iuc->root_ = root;
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iuc->terrain_ = terrainGeode;
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iuc->ss_ = ss;
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iuc->intersectionGroup_ = intersectionGroup;
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ss->setUpdateCallback(iuc);
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ss->setAllColors(osg::Vec4(1.0f,1.0f,1.0f,0.5f));
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ss->setSideColor(osg::Vec4(0.5f,1.0f,1.0f,0.1f));
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xform->addChild(ss);
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model->addChild(xform);
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}
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osg::ref_ptr<osg::Node> cessna = osgDB::readRefNodeFile("cessna.osgt");
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if (cessna)
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{
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const osg::BoundingSphere& bs = cessna->getBound();
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osgText::Text* text = new osgText::Text;
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float size = radius/bs.radius()*0.3f;
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text->setPosition(bs.center());
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text->setText("Cessna");
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text->setAlignment(osgText::Text::CENTER_CENTER);
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text->setAxisAlignment(osgText::Text::SCREEN);
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text->setCharacterSize(40.0f);
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text->setCharacterSizeMode(osgText::Text::OBJECT_COORDS);
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osg::Geode* geode = new osg::Geode;
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geode->addDrawable(text);
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osg::LOD* lod = new osg::LOD;
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lod->setRangeMode(osg::LOD::PIXEL_SIZE_ON_SCREEN);
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lod->setRadius(cessna->getBound().radius());
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lod->addChild(geode,0.0f,100.0f);
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lod->addChild(cessna,100.0f,10000.0f);
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osg::MatrixTransform* positioned = new osg::MatrixTransform;
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positioned->getOrCreateStateSet()->setMode(GL_NORMALIZE, osg::StateAttribute::ON);
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positioned->setDataVariance(osg::Object::STATIC);
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positioned->setMatrix(osg::Matrix::translate(-bs.center())*
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osg::Matrix::scale(size,size,size)*
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osg::Matrix::rotate(osg::inDegrees(180.0f),0.0f,0.0f,1.0f));
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//positioned->addChild(cessna);
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positioned->addChild(lod);
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osg::MatrixTransform* xform = new osg::MatrixTransform;
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xform->setUpdateCallback(new osg::AnimationPathCallback(animationPath,0.0f,2.0));
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xform->addChild(positioned);
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model->addChild(xform);
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}
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return model;
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}
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osg::Group* createOverlay(const osg::Vec3& center, float radius)
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{
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osg::Group* group = new osg::Group;
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// create a grid of lines.
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{
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osg::Geometry* geom = new osg::Geometry;
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unsigned int num_rows = 10;
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osg::Vec3 left = center+osg::Vec3(-radius,-radius,0.0f);
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osg::Vec3 right = center+osg::Vec3(radius,-radius,0.0f);
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osg::Vec3 delta_row = osg::Vec3(0.0f,2.0f*radius/float(num_rows-1),0.0f);
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osg::Vec3 top = center+osg::Vec3(-radius,radius,0.0f);
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osg::Vec3 bottom = center+osg::Vec3(-radius,-radius,0.0f);
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osg::Vec3 delta_column = osg::Vec3(2.0f*radius/float(num_rows-1),0.0f,0.0f);
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osg::Vec3Array* vertices = new osg::Vec3Array;
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for(unsigned int i=0; i<num_rows; ++i)
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{
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vertices->push_back(left);
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vertices->push_back(right);
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left += delta_row;
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right += delta_row;
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vertices->push_back(top);
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vertices->push_back(bottom);
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top += delta_column;
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bottom += delta_column;
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}
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geom->setVertexArray(vertices);
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osg::Vec4ubArray& color = *(new osg::Vec4ubArray(1));
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color[0].set(0,0,0,255);
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geom->setColorArray(&color, osg::Array::BIND_OVERALL);
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geom->addPrimitiveSet(new osg::DrawArrays(GL_LINES,0,vertices->getNumElements()));
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geom->getOrCreateStateSet()->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
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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::Vec3 computeTerrainIntersection(osg::Node* subgraph,float x,float y)
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{
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const osg::BoundingSphere& bs = subgraph->getBound();
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float zMax = bs.center().z()+bs.radius();
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float zMin = bs.center().z()-bs.radius();
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osg::ref_ptr<osgUtil::LineSegmentIntersector> intersector =
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new osgUtil::LineSegmentIntersector(osg::Vec3(x,y,zMin),osg::Vec3(x,y,zMax));
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osgUtil::IntersectionVisitor iv(intersector.get());
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subgraph->accept(iv);
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if (intersector->containsIntersections())
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{
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return intersector->getFirstIntersection().getWorldIntersectPoint();
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}
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return osg::Vec3(x,y,0.0f);
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}
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class AdjustSphereSegmentCallback : public osgGA::GUIEventHandler
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{
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public:
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void scaleSphereSegment(osgSim::SphereSegment* ss, float scale)
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{
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if (!ss) return;
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osg::Vec3 direction_vec;
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float azRange, elevRange;
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ss->getArea(direction_vec, azRange, elevRange);
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ss->setArea(direction_vec, azRange*scale, elevRange*scale);
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}
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virtual bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& /*aa*/, osg::Object* object, osg::NodeVisitor* /*nv*/)
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{
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if (ea.getHandled()) return false;
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switch(ea.getEventType())
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{
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case(osgGA::GUIEventAdapter::KEYDOWN):
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{
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if (ea.getKey()=='>')
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{
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scaleSphereSegment(dynamic_cast<osgSim::SphereSegment*>(object), 1.1f);
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return true;
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}
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else if (ea.getKey()=='<')
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{
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scaleSphereSegment(dynamic_cast<osgSim::SphereSegment*>(object), 1.0f/1.1f);
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}
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break;
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}
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default:
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break;
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}
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return false;
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}
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};
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//////////////////////////////////////////////////////////////////////////////
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// MAIN SCENE GRAPH BUILDING FUNCTION
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//////////////////////////////////////////////////////////////////////////////
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void build_world(osg::Group *root, unsigned int testCase, bool useOverlay, osgSim::OverlayNode::OverlayTechnique technique)
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{
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// create terrain
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osg::ref_ptr<osg::Geode> terrainGeode;
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{
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terrainGeode = new osg::Geode;
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osg::ref_ptr<osg::StateSet> stateset = new osg::StateSet();
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osg::ref_ptr<osg::Image> image = osgDB::readRefImageFile("Images/lz.rgb");
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if (image)
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{
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osg::Texture2D* texture = new osg::Texture2D;
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texture->setImage(image);
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stateset->setTextureAttributeAndModes(0,texture,osg::StateAttribute::ON);
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}
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terrainGeode->setStateSet( stateset );
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{
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unsigned int numColumns = 38;
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unsigned int numRows = 39;
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unsigned int r, c;
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osg::Vec3 origin(0.0f,0.0f,0.0f);
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osg::Vec3 size(1000.0f,1000.0f,250.0f);
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osg::ref_ptr<osg::Geometry> geometry = new osg::Geometry;
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osg::Vec3Array& v = *(new osg::Vec3Array(numColumns*numRows));
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osg::Vec2Array& tc = *(new osg::Vec2Array(numColumns*numRows));
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osg::Vec4ubArray& color = *(new osg::Vec4ubArray(1));
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color[0].set(255,255,255,255);
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float rowCoordDelta = size.y()/(float)(numRows-1);
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float columnCoordDelta = size.x()/(float)(numColumns-1);
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float rowTexDelta = 1.0f/(float)(numRows-1);
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float columnTexDelta = 1.0f/(float)(numColumns-1);
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// compute z range of z values of grid data so we can scale it.
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float min_z = FLT_MAX;
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float max_z = -FLT_MAX;
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for(r=0;r<numRows;++r)
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{
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for(c=0;c<numColumns;++c)
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{
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min_z = osg::minimum(min_z,vertex[r+c*numRows][2]);
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max_z = osg::maximum(max_z,vertex[r+c*numRows][2]);
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}
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}
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float scale_z = size.z()/(max_z-min_z);
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osg::Vec3 pos = origin;
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osg::Vec2 tex(0.0f,0.0f);
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int vi=0;
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for(r=0;r<numRows;++r)
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{
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pos.x() = origin.x();
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tex.x() = 0.0f;
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for(c=0;c<numColumns;++c)
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{
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v[vi].set(pos.x(),pos.y(),pos.z()+(vertex[r+c*numRows][2]-min_z)*scale_z);
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tc[vi] = tex;
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pos.x()+=columnCoordDelta;
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tex.x()+=columnTexDelta;
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++vi;
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}
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pos.y() += rowCoordDelta;
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tex.y() += rowTexDelta;
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}
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|
|
|
geometry->setVertexArray(&v);
|
|
geometry->setTexCoordArray(0, &tc);
|
|
geometry->setColorArray(&color, osg::Array::BIND_OVERALL);
|
|
|
|
for(r=0;r<numRows-1;++r)
|
|
{
|
|
osg::DrawElementsUShort& drawElements = *(new osg::DrawElementsUShort(GL_QUAD_STRIP,2*numColumns));
|
|
geometry->addPrimitiveSet(&drawElements);
|
|
int ei=0;
|
|
for(c=0;c<numColumns;++c)
|
|
{
|
|
drawElements[ei++] = (r+1)*numColumns+c;
|
|
drawElements[ei++] = (r)*numColumns+c;
|
|
}
|
|
}
|
|
|
|
osgUtil::SmoothingVisitor smoother;
|
|
smoother.smooth(*geometry);
|
|
|
|
terrainGeode->addDrawable(geometry);
|
|
}
|
|
|
|
}
|
|
|
|
|
|
// create sphere segment
|
|
osg::ref_ptr<osgSim::SphereSegment> ss = 0;
|
|
{
|
|
|
|
osg::Matrix terrainToSS;
|
|
|
|
switch(testCase)
|
|
{
|
|
case(0):
|
|
ss = new osgSim::SphereSegment(
|
|
computeTerrainIntersection(terrainGeode.get(),550.0f,780.0f), // center
|
|
510.0f, // radius
|
|
osg::DegreesToRadians(135.0f),
|
|
osg::DegreesToRadians(240.0f),
|
|
osg::DegreesToRadians(-10.0f),
|
|
osg::DegreesToRadians(30.0f),
|
|
60);
|
|
root->addChild(ss.get());
|
|
break;
|
|
case(1):
|
|
ss = new osgSim::SphereSegment(
|
|
computeTerrainIntersection(terrainGeode.get(),550.0f,780.0f), // center
|
|
510.0f, // radius
|
|
osg::DegreesToRadians(45.0f),
|
|
osg::DegreesToRadians(240.0f),
|
|
osg::DegreesToRadians(-10.0f),
|
|
osg::DegreesToRadians(30.0f),
|
|
60);
|
|
root->addChild(ss.get());
|
|
break;
|
|
case(2):
|
|
ss = new osgSim::SphereSegment(
|
|
computeTerrainIntersection(terrainGeode.get(),550.0f,780.0f), // center
|
|
510.0f, // radius
|
|
osg::DegreesToRadians(5.0f),
|
|
osg::DegreesToRadians(355.0f),
|
|
osg::DegreesToRadians(-10.0f),
|
|
osg::DegreesToRadians(30.0f),
|
|
60);
|
|
root->addChild(ss.get());
|
|
break;
|
|
case(3):
|
|
ss = new osgSim::SphereSegment(
|
|
computeTerrainIntersection(terrainGeode.get(),550.0f,780.0f), // center
|
|
510.0f, // radius
|
|
osg::DegreesToRadians(0.0f),
|
|
osg::DegreesToRadians(360.0f),
|
|
osg::DegreesToRadians(-10.0f),
|
|
osg::DegreesToRadians(30.0f),
|
|
60);
|
|
root->addChild(ss.get());
|
|
break;
|
|
case(4):
|
|
{
|
|
ss = new osgSim::SphereSegment(osg::Vec3d(0.0,0.0,0.0),
|
|
700.0f, // radius
|
|
osg::DegreesToRadians(135.0f),
|
|
osg::DegreesToRadians(240.0f),
|
|
osg::DegreesToRadians(-60.0f),
|
|
osg::DegreesToRadians(-40.0f),
|
|
60);
|
|
|
|
osg::ref_ptr<osg::MatrixTransform> mt = new osg::MatrixTransform;
|
|
|
|
mt->setMatrix(osg::Matrix(-0.851781, 0.156428, -0.5, 0,
|
|
-0.180627, -0.983552, -6.93889e-18, 0,
|
|
-0.491776, 0.0903136, 0.866025, 0,
|
|
598.217, 481.957, 100, 1));
|
|
mt->addChild(ss.get());
|
|
|
|
terrainToSS.invert(mt->getMatrix());
|
|
|
|
root->addChild(mt.get());
|
|
break;
|
|
}
|
|
case(5):
|
|
{
|
|
ss = new osgSim::SphereSegment(osg::Vec3d(0.0,0.0,0.0),
|
|
700.0f, // radius
|
|
osg::DegreesToRadians(35.0f),
|
|
osg::DegreesToRadians(135.0f),
|
|
osg::DegreesToRadians(-60.0f),
|
|
osg::DegreesToRadians(-40.0f),
|
|
60);
|
|
|
|
osg::ref_ptr<osg::MatrixTransform> mt = new osg::MatrixTransform;
|
|
|
|
mt->setMatrix(osg::Matrix(-0.851781, 0.156428, -0.5, 0,
|
|
-0.180627, -0.983552, -6.93889e-18, 0,
|
|
-0.491776, 0.0903136, 0.866025, 0,
|
|
598.217, 481.957, 100, 1));
|
|
mt->addChild(ss.get());
|
|
|
|
terrainToSS.invert(mt->getMatrix());
|
|
|
|
root->addChild(mt.get());
|
|
break;
|
|
}
|
|
case(6):
|
|
{
|
|
ss = new osgSim::SphereSegment(osg::Vec3d(0.0,0.0,0.0),
|
|
700.0f, // radius
|
|
osg::DegreesToRadians(-45.0f),
|
|
osg::DegreesToRadians(45.0f),
|
|
osg::DegreesToRadians(-60.0f),
|
|
osg::DegreesToRadians(-40.0f),
|
|
60);
|
|
|
|
osg::ref_ptr<osg::MatrixTransform> mt = new osg::MatrixTransform;
|
|
|
|
mt->setMatrix(osg::Matrix(-0.851781, 0.156428, -0.5, 0,
|
|
-0.180627, -0.983552, -6.93889e-18, 0,
|
|
-0.491776, 0.0903136, 0.866025, 0,
|
|
598.217, 481.957, 100, 1));
|
|
mt->addChild(ss.get());
|
|
|
|
terrainToSS.invert(mt->getMatrix());
|
|
|
|
root->addChild(mt.get());
|
|
break;
|
|
}
|
|
case(7):
|
|
{
|
|
ss = new osgSim::SphereSegment(
|
|
computeTerrainIntersection(terrainGeode.get(),550.0f,780.0f), // center
|
|
510.0f, // radius
|
|
osg::DegreesToRadians(-240.0f),
|
|
osg::DegreesToRadians(-135.0f),
|
|
osg::DegreesToRadians(-10.0f),
|
|
osg::DegreesToRadians(30.0f),
|
|
60);
|
|
ss->setUpdateCallback(new RotateUpdateCallback());
|
|
root->addChild(ss.get());
|
|
break;
|
|
}
|
|
};
|
|
|
|
if (ss.valid())
|
|
{
|
|
ss->setAllColors(osg::Vec4(1.0f,1.0f,1.0f,0.5f));
|
|
ss->setSideColor(osg::Vec4(0.0f,1.0f,1.0f,0.1f));
|
|
|
|
if (!ss->getParents().empty())
|
|
{
|
|
ss->getParent(0)->addChild(ss->computeIntersectionSubgraph(terrainToSS, terrainGeode.get()));
|
|
}
|
|
|
|
ss->setEventCallback(new AdjustSphereSegmentCallback);
|
|
|
|
}
|
|
}
|
|
|
|
|
|
if (useOverlay)
|
|
{
|
|
osgSim::OverlayNode* overlayNode = new osgSim::OverlayNode(technique);
|
|
overlayNode->getOrCreateStateSet()->setTextureAttribute(1, new osg::TexEnv(osg::TexEnv::DECAL));
|
|
|
|
const osg::BoundingSphere& bs = terrainGeode->getBound();
|
|
osg::Group* overlaySubgraph = createOverlay(bs.center(), bs.radius()*0.5f);
|
|
overlaySubgraph->addChild(ss.get());
|
|
overlayNode->setOverlaySubgraph(overlaySubgraph);
|
|
overlayNode->setOverlayTextureSizeHint(1024);
|
|
overlayNode->setOverlayBaseHeight(0.0);
|
|
overlayNode->addChild(terrainGeode.get());
|
|
|
|
root->addChild(overlayNode);
|
|
}
|
|
else
|
|
{
|
|
root->addChild(terrainGeode.get());
|
|
}
|
|
|
|
// create particle effects
|
|
{
|
|
osg::Vec3 position = computeTerrainIntersection(terrainGeode.get(),100.0f,100.0f);
|
|
|
|
osgParticle::ExplosionEffect* explosion = new osgParticle::ExplosionEffect(position, 10.0f);
|
|
osgParticle::SmokeEffect* smoke = new osgParticle::SmokeEffect(position, 10.0f);
|
|
osgParticle::FireEffect* fire = new osgParticle::FireEffect(position, 10.0f);
|
|
|
|
root->addChild(explosion);
|
|
root->addChild(smoke);
|
|
root->addChild(fire);
|
|
}
|
|
|
|
// create particle effects
|
|
{
|
|
osg::Vec3 position = computeTerrainIntersection(terrainGeode.get(),200.0f,100.0f);
|
|
|
|
osgParticle::ExplosionEffect* explosion = new osgParticle::ExplosionEffect(position, 1.0f);
|
|
osgParticle::SmokeEffect* smoke = new osgParticle::SmokeEffect(position, 1.0f);
|
|
osgParticle::FireEffect* fire = new osgParticle::FireEffect(position, 1.0f);
|
|
|
|
root->addChild(explosion);
|
|
root->addChild(smoke);
|
|
root->addChild(fire);
|
|
}
|
|
|
|
|
|
bool createMovingRadar = true;
|
|
|
|
// create the moving models.
|
|
{
|
|
root->addChild(createMovingModel(osg::Vec3(500.0f,500.0f,500.0f),100.0f, terrainGeode.get(), root, createMovingRadar));
|
|
}
|
|
}
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
// main()
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
// use an ArgumentParser object to manage the program arguments.
|
|
osg::ArgumentParser arguments(&argc,argv);
|
|
|
|
// set up the usage document, in case we need to print out how to use this program.
|
|
arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" is the example which demonstrates use of particle systems.");
|
|
arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" [options] image_file_left_eye image_file_right_eye");
|
|
arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
|
|
|
|
|
|
// construct the viewer.
|
|
osgViewer::Viewer viewer(arguments);
|
|
|
|
// if user request help write it out to cout.
|
|
unsigned int testCase = 0;
|
|
while (arguments.read("-t", testCase)) {}
|
|
|
|
bool useOverlay = false;
|
|
osgSim::OverlayNode::OverlayTechnique technique = osgSim::OverlayNode::OBJECT_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY;
|
|
while (arguments.read("--object")) { useOverlay = true; technique = osgSim::OverlayNode::OBJECT_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY; }
|
|
while (arguments.read("--ortho") || arguments.read("--orthographic")) { useOverlay = true; technique = osgSim::OverlayNode::VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY; }
|
|
while (arguments.read("--persp") || arguments.read("--perspective")) { useOverlay = true; technique = osgSim::OverlayNode::VIEW_DEPENDENT_WITH_PERSPECTIVE_OVERLAY; }
|
|
|
|
|
|
// if user request help write it out to cout.
|
|
if (arguments.read("-h") || arguments.read("--help"))
|
|
{
|
|
arguments.getApplicationUsage()->write(std::cout);
|
|
return 1;
|
|
}
|
|
|
|
// any option left unread are converted into errors to write out later.
|
|
arguments.reportRemainingOptionsAsUnrecognized();
|
|
|
|
// report any errors if they have occurred when parsing the program arguments.
|
|
if (arguments.errors())
|
|
{
|
|
arguments.writeErrorMessages(std::cout);
|
|
return 1;
|
|
}
|
|
|
|
osg::Group *root = new osg::Group;
|
|
build_world(root, testCase, useOverlay, technique);
|
|
|
|
|
|
viewer.addEventHandler(new osgViewer::StatsHandler);
|
|
|
|
// add a viewport to the viewer and attach the scene graph.
|
|
viewer.setSceneData(root);
|
|
|
|
return viewer.run();
|
|
}
|