19db0c1674
Vivek's email to osg-submissions: "I'm happy to release the osgdragger nodekit to the OSG community. I implemented the nodekit for my company, Fugro-Jason Inc., and they have kindly agreed to open source it. The nodekit contains a few draggers but it should be easy to build new draggers on top of it. The design of the nodekit is based on a SIGGRAPH 2002 course - "Design and Implementation of Direct Manipulation in 3D". You can find the course notes at http://www.pauliface.com/Sigg02/index.html. Reading pages 20 - 29 of the course notes should give you a fair understanding of how the nodekit works. The source code also contains an example of how to use the draggers."
115 lines
5.0 KiB
C++
115 lines
5.0 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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#ifndef OSGMANIPULATOR_SCALE2DDRAGGER
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#define OSGMANIPULATOR_SCALE2DDRAGGER 1
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#include <osgManipulator/Dragger>
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#include <osgManipulator/Projector>
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namespace osgManipulator {
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/**
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* Dragger for performing 2D scaling.
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*/
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class OSGMANIPULATOR_EXPORT Scale2DDragger : public Dragger
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{
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public:
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enum ScaleMode
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{
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SCALE_WITH_ORIGIN_AS_PIVOT = 0,
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SCALE_WITH_OPPOSITE_HANDLE_AS_PIVOT
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};
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Scale2DDragger(ScaleMode scaleMode=SCALE_WITH_ORIGIN_AS_PIVOT);
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/**
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* Handle pick events on dragger and generate TranslateInLine commands.
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*/
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virtual bool handle(int pixel_x, int pixel_y, const osgUtil::SceneView& sv,
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const osgUtil::IntersectVisitor::HitList& hitList,
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const osgUtil::IntersectVisitor::HitList::iterator& hitIter,
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const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& us);
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/** Setup default geometry for dragger. */
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void setupDefaultGeometry();
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/** Set/Get min scale for dragger. */
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inline void setMinScale(const osg::Vec2& min) { _minScale = min; }
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inline const osg::Vec2& getMinScale() const { return _minScale; }
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/** Set/Get color for dragger. */
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inline void setColor(const osg::Vec4& color) { _color = color; setMaterialColor(_color,*this); }
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inline const osg::Vec4 getColor() const { return _color; }
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/**
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* Set/Get pick color for dragger. Pick color is color of the dragger
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* when picked. It gives a visual feedback to show that the dragger has
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* been picked.
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*/
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inline void setPickColor(const osg::Vec4& color) { _pickColor = color; }
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inline const osg::Vec4 getPickColor() const { return _pickColor; }
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/** Set/Get the handle nodes for dragger. */
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inline void setTopLeftHandleNode (osg::Node& node) { _topLeftHandleNode = &node; }
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inline osg::Node* getTopLeftHandleNode() { return _topLeftHandleNode.get(); }
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inline void setBottomLeftHandleNode (osg::Node& node) { _bottomLeftHandleNode = &node; }
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inline osg::Node* getBottomLeftHandleNode() { return _bottomLeftHandleNode.get(); }
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inline void setTopRightHandleNode(osg::Node& node) { _topRightHandleNode = &node; }
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inline osg::Node* getTopRightHandleNode() { return _topRightHandleNode.get(); }
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inline void setBottomRightHandleNode(osg::Node& node) { _bottomRightHandleNode = &node; }
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inline osg::Node* getBottomRightHandleNode() { return _bottomRightHandleNode.get(); }
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/** Set/Get the handle nodes postion for dragger. */
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inline void setTopLeftHandlePosition(const osg::Vec2& pos) { _topLeftHandlePosition = pos; }
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const osg::Vec2& getTopLeftHandlePosition() { return _topLeftHandlePosition; }
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inline void setBottomLeftHandlePosition(const osg::Vec2& pos) { _bottomLeftHandlePosition = pos; }
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const osg::Vec2& getBottomLeftHandlePosition() { return _bottomLeftHandlePosition; }
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inline void setTopRightHandlePosition(const osg::Vec2& pos) { _topRightHandlePosition = pos; }
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const osg::Vec2& getTopRightHandlePosition() { return _topRightHandlePosition; }
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inline void setBottomRightHandlePosition(const osg::Vec2& pos){ _bottomRightHandlePosition = pos; }
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const osg::Vec2& getBottomRightHandlePosition() { return _bottomRightHandlePosition; }
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protected:
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virtual ~Scale2DDragger();
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osg::ref_ptr< PlaneProjector > _projector;
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osg::Vec3 _startProjectedPoint;
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osg::Vec2 _scaleCenter;
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osg::Vec2 _referencePoint;
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osg::Vec2 _minScale;
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osg::ref_ptr< osg::Node > _topLeftHandleNode;
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osg::ref_ptr< osg::Node > _bottomLeftHandleNode;
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osg::ref_ptr< osg::Node > _topRightHandleNode;
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osg::ref_ptr< osg::Node > _bottomRightHandleNode;
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osg::Vec2 _topLeftHandlePosition;
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osg::Vec2 _bottomLeftHandlePosition;
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osg::Vec2 _topRightHandlePosition;
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osg::Vec2 _bottomRightHandlePosition;
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osg::Vec4 _color;
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osg::Vec4 _pickColor;
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ScaleMode _scaleMode;
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};
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}
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#endif
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