146 lines
5.4 KiB
C++
146 lines
5.4 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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//osgManipulator - Copyright (C) 2007 Fugro-Jason B.V.
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#include <osgManipulator/RotateSphereDragger>
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#include <osgManipulator/Command>
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#include <osg/ShapeDrawable>
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#include <osg/Geometry>
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#include <osg/Material>
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#include <iostream>
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using namespace osgManipulator;
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RotateSphereDragger::RotateSphereDragger() : _prevPtOnSphere(true)
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{
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_projector = new SpherePlaneProjector();
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setColor(osg::Vec4(0.0f, 1.0f, 0.0f, 1.0f));
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setPickColor(osg::Vec4(1.0f, 1.0f, 0.0f, 1.0f));
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}
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RotateSphereDragger::~RotateSphereDragger()
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{
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}
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bool RotateSphereDragger::handle(const PointerInfo& pointer, const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa)
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{
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// Check if the dragger node is in the nodepath.
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if (!pointer.contains(this)) return false;
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switch (ea.getEventType())
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{
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// Pick start.
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case (osgGA::GUIEventAdapter::PUSH):
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{
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// Get the LocalToWorld matrix for this node and set it for the projector.
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osg::NodePath nodePathToRoot;
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computeNodePathToRoot(*this,nodePathToRoot);
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osg::Matrix localToWorld = osg::computeLocalToWorld(nodePathToRoot);
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_projector->setLocalToWorld(localToWorld);
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_startLocalToWorld = _projector->getLocalToWorld();
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_startWorldToLocal = _projector->getWorldToLocal();
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if (_projector->isPointInFront(pointer, _startLocalToWorld))
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_projector->setFront(true);
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else
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_projector->setFront(false);
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osg::Vec3d projectedPoint;
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if (_projector->project(pointer, projectedPoint))
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{
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// Generate the motion command.
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osg::ref_ptr<Rotate3DCommand> cmd = new Rotate3DCommand();
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cmd->setStage(MotionCommand::START);
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cmd->setLocalToWorldAndWorldToLocal(_startLocalToWorld,_startWorldToLocal);
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// Dispatch command.
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dispatch(*cmd);
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// Set color to pick color.
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setMaterialColor(_pickColor,*this);
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_prevRotation = osg::Quat();
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_prevWorldProjPt = projectedPoint * _projector->getLocalToWorld();
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_prevPtOnSphere = _projector->isProjectionOnSphere();
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aa.requestRedraw();
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}
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return true;
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}
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// Pick move.
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case (osgGA::GUIEventAdapter::DRAG):
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{
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// Get the LocalToWorld matrix for this node and set it for the projector.
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osg::Matrix localToWorld = osg::Matrix(_prevRotation) * _startLocalToWorld;
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_projector->setLocalToWorld(localToWorld);
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osg::Vec3d projectedPoint;
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if (_projector->project(pointer, projectedPoint))
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{
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osg::Vec3d prevProjectedPoint = _prevWorldProjPt * _projector->getWorldToLocal();
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osg::Quat deltaRotation = _projector->getRotation(prevProjectedPoint, _prevPtOnSphere,
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projectedPoint, _projector->isProjectionOnSphere(),1.0f);
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osg::Quat rotation = deltaRotation * _prevRotation;
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// Generate the motion command.
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osg::ref_ptr<Rotate3DCommand> cmd = new Rotate3DCommand();
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cmd->setStage(MotionCommand::MOVE);
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cmd->setLocalToWorldAndWorldToLocal(_startLocalToWorld,_startWorldToLocal);
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cmd->setRotation(rotation);
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// Dispatch command.
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dispatch(*cmd);
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_prevWorldProjPt = projectedPoint * _projector->getLocalToWorld();
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_prevRotation = rotation;
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_prevPtOnSphere = _projector->isProjectionOnSphere();
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aa.requestRedraw();
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}
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return true;
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}
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// Pick finish.
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case (osgGA::GUIEventAdapter::RELEASE):
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{
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osg::ref_ptr<Rotate3DCommand> cmd = new Rotate3DCommand();
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cmd->setStage(MotionCommand::FINISH);
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cmd->setLocalToWorldAndWorldToLocal(_startLocalToWorld,_startWorldToLocal);
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// Dispatch command.
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dispatch(*cmd);
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// Reset color.
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setMaterialColor(_color,*this);
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aa.requestRedraw();
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return true;
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}
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default:
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return false;
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}
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}
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void RotateSphereDragger::setupDefaultGeometry()
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{
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osg::Geode* geode = new osg::Geode;
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geode->addDrawable(new osg::ShapeDrawable(const_cast<osg::Sphere*>(_projector->getSphere())));
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addChild(geode);
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}
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