Added event handle for interactive setting of keystone variables
This commit is contained in:
Robert Osfield
parent
890ecb6abb
commit
1dba64ac6c
@ -24,6 +24,279 @@
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#include <osgViewer/Viewer>
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class ControlPoints : public osg::Referenced
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{
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public:
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ControlPoints():
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bottom_left(-1.0,-1.0),
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bottom_right(1.0,-1.0),
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top_left(-1.0,1.0),
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top_right(1.0,1.0) {}
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void reset()
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{
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bottom_left.set(-1.0,-1.0);
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bottom_right.set(1.0,-1.0);
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top_left.set(-1.0,1.0);
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top_right.set(1.0,1.0);
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}
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ControlPoints& operator = (const ControlPoints& rhs)
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{
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if (&rhs==this) return *this;
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bottom_left = rhs.bottom_left;
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bottom_right = rhs.bottom_right;
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top_left = rhs.top_left;
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top_right = rhs.top_right;
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return *this;
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}
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osg::Vec2d bottom_left;
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osg::Vec2d bottom_right;
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osg::Vec2d top_left;
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osg::Vec2d top_right;
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};
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class Keystone : public osg::Referenced
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{
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public:
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Keystone():
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translate(0.0,0.0),
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scale(1.0,1.0),
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taper(1.0,1.0),
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angle(0.0)
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{
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}
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void updateKeystone(ControlPoints cp)
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{
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// compute translation
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translate = (cp.bottom_left+cp.bottom_right+cp.top_left+cp.top_right)*0.25;
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// adjust control points to fit translation
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cp.top_left += translate;
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cp.top_right += translate;
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cp.bottom_right += translate;
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cp.bottom_left += translate;
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// compute scaling
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scale.x() = ( (cp.top_right.x()-cp.top_left.x()) + (cp.bottom_right.x()-cp.bottom_left.x()) )/4.0;
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scale.y() = ( (cp.top_right.y()-cp.bottom_right.y()) + (cp.top_left.y()-cp.bottom_left.y()) )/4.0;
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// adjust control points to fit scaling
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cp.top_left.x() *= scale.x();
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cp.top_right.x() *= scale.x();
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cp.bottom_right.x() *= scale.x();
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cp.bottom_left.x() *= scale.x();
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cp.top_left.y() *= scale.y();
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cp.top_right.y() *= scale.y();
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cp.bottom_right.y() *= scale.y();
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cp.bottom_left.y() *= scale.y();
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//angle = atan2(-cp.bottom_left.x(),(-cp.bottom_left.y())
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//taper.x() = (cp.top_left-cp.bottom_left).length() / (cp.top_right-cp.bottom_right).length();
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//taper.y() = (cp.top_right-cp.top_left).length() / (cp.bottom_right-cp.bottom_left).length();
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OSG_NOTICE<<"translate="<<translate<<std::endl;
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OSG_NOTICE<<"scale="<<scale<<std::endl;
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OSG_NOTICE<<"taper="<<taper<<std::endl;
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OSG_NOTICE<<"angle="<<osg::RadiansToDegrees(angle)<<std::endl;
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}
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osg::Matrixd computeKeystoneMatrix() const
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{
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osg::Matrixd pm;
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pm.postMultRotate(osg::Quat(angle, osg::Vec3d(0.0,0.0,1.0)));
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pm.postMultScale(osg::Vec3d(scale.x(),scale.y(),1.0));
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pm.postMultTranslate(osg::Vec3d(translate.x(),translate.y(),0.0));
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if (taper.x()!=1.0)
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{
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double x0 = (1.0+taper.x())/(1-taper.x());
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pm.postMult(osg::Matrixd(1.0-x0, 0.0, 0.0, 1.0,
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0.0, 1.0-x0, 0.0, 0.0,
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0.0, 0.0, (1.0-x0)*0.5, 0.0,
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0.0, 0.0, 0.0, -x0));
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}
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if (taper.y()!=1.0)
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{
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double y0 = (1.0+taper.y())/(1-taper.y());
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pm.postMult(osg::Matrixd(1.0-y0, 0.0, 0.0, 0.0,
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0.0, 1.0-y0, 0.0, 1.0,
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0.0, 0.0, (1.0-y0)*0.5, 0.0,
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0.0, 0.0, 0.0, -y0));
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}
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return pm;
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}
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osg::Vec2d translate;
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osg::Vec2d scale;
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osg::Vec2d taper;
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double angle;
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};
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class KeystoneHandler : public osgGA::GUIEventHandler
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{
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public:
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KeystoneHandler(Keystone* keystone);
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~KeystoneHandler() {}
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bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& aa);
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enum Region
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{
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NONE_SELECTED,
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TOP_LEFT,
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TOP,
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TOP_RIGHT,
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RIGHT,
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BOTTOM_RIGHT,
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BOTTOM,
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BOTTOM_LEFT,
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LEFT,
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CENTER
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};
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protected:
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osg::ref_ptr<Keystone> _keystone;
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osg::Vec2d _startPosition;
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osg::ref_ptr<ControlPoints> _startControlPoints;
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Region _selectedRegion;
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osg::ref_ptr<ControlPoints> _currentControlPoints;
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};
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KeystoneHandler::KeystoneHandler(Keystone* keystone):
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_keystone(keystone),
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_selectedRegion(NONE_SELECTED)
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{
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_startControlPoints = new ControlPoints;
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_currentControlPoints = new ControlPoints;
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}
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bool KeystoneHandler::handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa)
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{
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switch(ea.getEventType())
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{
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case(osgGA::GUIEventAdapter::PUSH):
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{
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OSG_NOTICE<<"Push with ea.getModKeyMask()="<<ea.getModKeyMask()<<std::endl;
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if (ea.getModKeyMask()==osgGA::GUIEventAdapter::MODKEY_LEFT_CTRL || ea.getModKeyMask()==osgGA::GUIEventAdapter::MODKEY_RIGHT_CTRL )
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{
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OSG_NOTICE<<"Mouse "<<ea.getXnormalized()<<", "<<ea.getYnormalized()<<std::endl;
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float x = ea.getXnormalized();
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float y = ea.getYnormalized();
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if (x<-0.33)
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{
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// left side
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if (y<-0.33) _selectedRegion = BOTTOM_LEFT;
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else if (y<0.33) _selectedRegion = LEFT;
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else _selectedRegion = TOP_LEFT;
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}
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else if (x<0.33)
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{
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// center side
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if (y<-0.33) _selectedRegion = BOTTOM;
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else if (y<0.33) _selectedRegion = CENTER;
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else _selectedRegion = TOP;
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}
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else
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{
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// right side
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if (y<-0.33) _selectedRegion = BOTTOM_RIGHT;
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else if (y<0.33) _selectedRegion = RIGHT;
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else _selectedRegion = TOP_RIGHT;
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}
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(*_startControlPoints) = (*_currentControlPoints);
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_startPosition.set(x,y);
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OSG_NOTICE<<"Region "<<_selectedRegion<<std::endl;
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}
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else
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{
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_selectedRegion = NONE_SELECTED;
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}
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return false;
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}
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case(osgGA::GUIEventAdapter::DRAG):
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{
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if (_selectedRegion!=NONE_SELECTED)
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{
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(*_currentControlPoints) = (*_startControlPoints);
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osg::Vec2d currentPosition(ea.getXnormalized(), ea.getYnormalized());
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osg::Vec2d delta(currentPosition-_startPosition);
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OSG_NOTICE<<"Moving region "<<_selectedRegion<<", moving by "<<currentPosition-_startPosition<<std::endl;
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switch(_selectedRegion)
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{
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case(TOP_LEFT):
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_currentControlPoints->top_left += delta;
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break;
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case(TOP):
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_currentControlPoints->top_left += delta;
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_currentControlPoints->top_right += delta;
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break;
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case(TOP_RIGHT):
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_currentControlPoints->top_right += delta;
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break;
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case(RIGHT):
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_currentControlPoints->top_right += delta;
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_currentControlPoints->bottom_right += delta;
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break;
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case(BOTTOM_RIGHT):
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_currentControlPoints->bottom_right += delta;
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break;
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case(BOTTOM):
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_currentControlPoints->bottom_right += delta;
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_currentControlPoints->bottom_left += delta;
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break;
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case(BOTTOM_LEFT):
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_currentControlPoints->bottom_left += delta;
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break;
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case(LEFT):
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_currentControlPoints->bottom_left += delta;
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_currentControlPoints->top_left += delta;
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break;
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case(CENTER):
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_currentControlPoints->bottom_left += delta;
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_currentControlPoints->top_left += delta;
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_currentControlPoints->bottom_right += delta;
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_currentControlPoints->top_right += delta;
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break;
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case(NONE_SELECTED):
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break;
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}
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_keystone->updateKeystone(*_currentControlPoints);
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return true;
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}
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return false;
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}
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case(osgGA::GUIEventAdapter::RELEASE):
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{
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OSG_NOTICE<<"Mouse released "<<std::endl;
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_selectedRegion = NONE_SELECTED;
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return false;
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}
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case(osgGA::GUIEventAdapter::KEYDOWN):
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{
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if (ea.getKey()=='r')
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{
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_selectedRegion = NONE_SELECTED;
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_startControlPoints->reset();
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_currentControlPoints->reset();
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_keystone->updateKeystone(*_currentControlPoints);
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}
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return false;
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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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int main( int argc, char **argv )
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{
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@ -32,16 +305,21 @@ int main( int argc, char **argv )
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// initialize the viewer.
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osgViewer::Viewer viewer(arguments);
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osg::Vec2d translate(0.0,0.0);
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osg::Vec2d scale(1.0,1.0);
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osg::Vec2d taper(1.0,1.0);
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double angle = 0; // osg::inDegrees(45.0);
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osg::ref_ptr<Keystone> keystone = new Keystone;
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if (arguments.read("-a",angle)) { OSG_NOTICE<<"angle = "<<angle<<std::endl; angle = osg::inDegrees(angle); }
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if (arguments.read("-t",translate.x(), translate.y())) { OSG_NOTICE<<"translate = "<<translate<<std::endl;}
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if (arguments.read("-s",scale.x(), scale.y())) { OSG_NOTICE<<"scale = "<<scale<<std::endl;}
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if (arguments.read("-k",taper.x(), taper.y())) { OSG_NOTICE<<"taper = "<<taper<<std::endl;}
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double distance, width, view_angle;
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if (arguments.read("-p",distance, width, view_angle))
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{
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keystone->taper.x() = (2.0 + (width/distance) * sin(osg::inDegrees(view_angle))) / (2.0 - (width/distance) * sin(osg::inDegrees(view_angle)));
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//scale.x() = 1.0/cos(osg::inDegrees(view_angle));
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OSG_NOTICE<<"scale "<<keystone->scale<<std::endl;
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OSG_NOTICE<<"taper "<<keystone->taper<<std::endl;
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}
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if (arguments.read("-a",keystone->angle)) { OSG_NOTICE<<"angle = "<<keystone->angle<<std::endl; keystone->angle = osg::inDegrees(keystone->angle); }
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if (arguments.read("-t",keystone->translate.x(), keystone->translate.y())) { OSG_NOTICE<<"translate = "<<keystone->translate<<std::endl;}
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if (arguments.read("-s",keystone->scale.x(), keystone->scale.y())) { OSG_NOTICE<<"scale = "<<keystone->scale<<std::endl;}
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if (arguments.read("-k",keystone->taper.x(), keystone->taper.y())) { OSG_NOTICE<<"taper = "<<keystone->taper<<std::endl;}
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osg::ref_ptr<osg::Node> model = osgDB::readNodeFiles(arguments);
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@ -60,22 +338,21 @@ int main( int argc, char **argv )
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viewer.getCamera()->setComputeNearFarMode(osg::Camera::DO_NOT_COMPUTE_NEAR_FAR);
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osg::Matrixd& pm = viewer.getCamera()->getProjectionMatrix();
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osg::Matrixd original_pm = viewer.getCamera()->getProjectionMatrix();
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pm.postMultRotate(osg::Quat(angle, osg::Vec3d(0.0,0.0,1.0)));
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pm.postMultScale(osg::Vec3d(scale.x(),scale.y(),1.0));
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pm.postMultTranslate(osg::Vec3d(translate.x(),translate.y(),0.0));
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viewer.addEventHandler(new KeystoneHandler(keystone));
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if (taper.x()!=1.0)
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while(!viewer.done())
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{
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double x0 = (1.0+taper.x())/(1-taper.x());
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OSG_NOTICE<<"x0 = "<<x0<<std::endl;
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viewer.advance();
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viewer.eventTraversal();
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viewer.updateTraversal();
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pm.postMult(osg::Matrixd(1.0-x0, 0.0, 0.0, 1.0,
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0.0, 1.0-x0, 0.0, 0.0,
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0.0, 0.0, (1.0-x0)*0.5, 0.0,
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0.0, 0.0, 0.0, -x0));
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if (keystone.valid())
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{
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viewer.getCamera()->setProjectionMatrix(original_pm * keystone->computeKeystoneMatrix());
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}
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viewer.renderingTraversals();
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}
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return viewer.run();
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return 0;
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}
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