/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2009 Robert Osfield * * This library is open source and may be redistributed and/or modified under * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or * (at your option) any later version. The full license is in LICENSE file * included with this distribution, and on the openscenegraph.org website. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * OpenSceneGraph Public License for more details. */ #ifndef OSGVOLUME_LAYER #define OSGVOLUME_LAYER 1 #include #include #include #include namespace osgVolume { class OSGVOLUME_EXPORT Layer : public osg::Object { public: Layer(); /** Copy constructor using CopyOp to manage deep vs shallow copy.*/ Layer(const Layer&,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY); META_Object(osgVolume, Layer); /** Set the file name of the data associated with this layer. */ virtual void setFileName(const std::string& filename) { _filename = filename; } /** Get the file name of the layer. */ virtual const std::string& getFileName() const { return _filename; } void setLocator(Locator* locator) { _locator = locator; } Locator* getLocator() { return _locator.get(); } const Locator* getLocator() const { return _locator.get(); } void setDefaultValue(const osg::Vec4& value) { _defaultValue = value; } const osg::Vec4& getDefaultValue() const { return _defaultValue; } /** Set the minification texture filter to use when do texture associated with this layer.*/ void setMinFilter(osg::Texture::FilterMode filter) { _minFilter = filter; } /** Get the minification texture filter to use when do texture associated with this layer.*/ osg::Texture::FilterMode getMinFilter() const { return _minFilter; } /** Set the magniification texture filter to use when do texture associated with this layer.*/ void setMagFilter(osg::Texture::FilterMode filter) { _magFilter = filter; } /** Get the magnification texture filter to use when do texture associated with this layer.*/ osg::Texture::FilterMode getMagFilter() const { return _magFilter; } /** Return image associated with layer if supported. */ virtual osg::Image* getImage() { return 0; } /** Return const image associated with layer if supported. */ virtual const osg::Image* getImage() const { return 0; } /** Set the Property (or Properties via the CompositeProperty) that informs the VolumeTechnique how this layer should be rendered.*/ void setProperty(Property* property) { _property = property; } /** Get the Property that informs the VolumeTechnique how this layer should be rendered.*/ Property* getProperty() { return _property.get(); } /** Get the const Property that informs the VolumeTechnique how this layer should be rendered.*/ const Property* getProperty() const { return _property.get(); } /** Add a property, automatically creating a CompositePorperty if one isn't already assigned.*/ void addProperty(Property* property); /** Specify whether ImageLayer requires update traversal. */ virtual bool requiresUpdateTraversal() const { return false; } /** Call update on the Layer.*/ virtual void update(osg::NodeVisitor& /*nv*/) {} /** increment the modified count."*/ virtual void dirty() {}; /** Set the modified count value. */ virtual void setModifiedCount(unsigned int /*value*/) {}; /** Get modified count value. */ virtual unsigned int getModifiedCount() const { return 0; } virtual osg::BoundingSphere computeBound() const; protected: virtual ~Layer(); std::string _filename; osg::ref_ptr _locator; osg::Vec4 _defaultValue; osg::Texture::FilterMode _minFilter; osg::Texture::FilterMode _magFilter; osg::ref_ptr _property; }; class OSGVOLUME_EXPORT ImageLayer : public Layer { public: ImageLayer(osg::Image* image=0); /** Copy constructor using CopyOp to manage deep vs shallow copy.*/ ImageLayer(const ImageLayer& imageLayer,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY); META_Object(osgVolume, ImageLayer); void setFileName(const std::string& filename) { _filename = filename; if (_image.valid()) _image->setFileName(filename); } virtual const std::string& getFileName() const { return _image.get() ? _image->getFileName() : _filename; } void setImage(osg::Image* image); /** Return image associated with layer. */ virtual osg::Image* getImage() { return _image.get(); } /** Return const image associated with layer. */ virtual const osg::Image* getImage() const { return _image.get(); } /** Compute the min and max pixel colors.*/ bool computeMinMax(osg::Vec4& min, osg::Vec4& max); /** Apply color transformation to pixels using c' = offset + c * scale .*/ void offsetAndScaleImage(const osg::Vec4& offset, const osg::Vec4& scale); /** Compute the min max range of the image, and then remap this to a 0 to 1 range.*/ void rescaleToZeroToOneRange(); /** Compute the min color component of the image and then translate and pixels by this offset to make the new min component 0.*/ void translateMinToZero(); virtual bool requiresUpdateTraversal() const; virtual void update(osg::NodeVisitor& /*nv*/); virtual void dirty(); virtual void setModifiedCount(unsigned int value); virtual unsigned int getModifiedCount() const; protected: virtual ~ImageLayer() {} osg::ref_ptr _image; }; class OSGVOLUME_EXPORT CompositeLayer : public Layer { public: CompositeLayer(); /** Copy constructor using CopyOp to manage deep vs shallow copy.*/ CompositeLayer(const CompositeLayer& compositeLayer,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY); META_Object(osgVolume, CompositeLayer); void clear(); void setFileName(unsigned int i, const std::string& filename) { if (i>=_layers.size()) _layers.resize(i+1); _layers[i].filename = filename; if (_layers[i].layer.valid()) _layers[i].layer->setFileName(filename); } const std::string& getFileName(unsigned int i) const { return _layers[i].layer.valid() ? _layers[i].layer->getFileName() : _layers[i].filename; } void setLayer(unsigned int i, Layer* layer) { if (i>=_layers.size()) _layers.resize(i+1); _layers[i].layer = layer; } Layer* getLayer(unsigned int i) { return i<_layers.size() ? _layers[i].layer.get() : 0; } const Layer* getLayer(unsigned int i) const { return i<_layers.size() ? _layers[i].layer.get() : 0; } void addLayer(Layer* layer) { _layers.push_back(NameLayer(layer->getFileName(),layer)); } void removeLayer(unsigned int i) { _layers.erase(_layers.begin()+i); } unsigned int getNumLayers() const { return _layers.size(); } bool requiresUpdateTraversal() const; virtual void update(osg::NodeVisitor& /*nv*/); protected: virtual ~CompositeLayer() {} struct NameLayer { NameLayer() {} NameLayer(const NameLayer& cnl): filename(cnl.filename), layer(cnl.layer) {} NameLayer(const std::string& fn, Layer* l): filename(fn), layer(l) {} NameLayer& operator = (const NameLayer& cnl) { if (&cnl==this) return *this; filename = cnl.filename; layer = cnl.layer; return *this; } std::string filename; osg::ref_ptr layer; }; typedef std::vector< NameLayer > Layers; Layers _layers; }; /** Compute a 3d image that represent the normal map of the specified 3d image.*/ extern OSGVOLUME_EXPORT osg::Image* createNormalMapTexture(osg::Image* image_3d); /** Create an image that has a transfer function applied specified Image.*/ extern OSGVOLUME_EXPORT osg::Image* applyTransferFunction(osg::Image* image, osg::TransferFunction1D* transferFunction); } #endif