35e0ba12bc
Removed the Win32 remapping of keycodes from the osgProducer::EventAdapter.
466 lines
14 KiB
C++
466 lines
14 KiB
C++
#include <osg/Node>
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#include <osg/Geometry>
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#include <osg/Notify>
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#include <osg/MatrixTransform>
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#include <osg/Texture2D>
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#include <osg/DrawPixels>
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#include <osg/Geode>
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#include <osgDB/Registry>
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#include <osgDB/ReadFile>
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#include <osgProducer/Viewer>
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//
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// A simple demo demonstrating different texturing modes,
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// including using of texture extensions.
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//
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// include std to get round dumb compilers which can't handle std::hex/dec.
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using namespace std;
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typedef std::vector< osg::ref_ptr<osg::Image> > ImageList;
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class Texture2DCallback : public osg::NodeCallback
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{
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public:
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Texture2DCallback(osg::Texture2D* texture):_texture(texture)
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{
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_filterRange.push_back(osg::Texture2D::LINEAR);
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_filterRange.push_back(osg::Texture2D::LINEAR_MIPMAP_LINEAR);
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_filterRange.push_back(osg::Texture2D::LINEAR_MIPMAP_NEAREST);
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_filterRange.push_back(osg::Texture2D::NEAREST);
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_filterRange.push_back(osg::Texture2D::NEAREST_MIPMAP_LINEAR);
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_filterRange.push_back(osg::Texture2D::NEAREST_MIPMAP_NEAREST);
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_currPos = 0;
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_prevTime = 0.0;
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}
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virtual ~Texture2DCallback() {}
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virtual void operator()(osg::Node*, osg::NodeVisitor* nv)
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{
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if (nv->getFrameStamp())
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{
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double currTime = nv->getFrameStamp()->getReferenceTime();
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if (currTime-_prevTime>1.0)
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{
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cout<<"Updating texturing filter to "<<hex<<_filterRange[_currPos]<<dec<<std::endl;
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_texture->setFilter(osg::Texture2D::MAG_FILTER,_filterRange[_currPos]);
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_currPos++;
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if (_currPos>=_filterRange.size()) _currPos=0;
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_prevTime = currTime;
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}
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}
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}
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osg::ref_ptr<osg::Texture2D> _texture;
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std::vector<osg::Texture2D::FilterMode> _filterRange;
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unsigned int _currPos;
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double _prevTime;
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};
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/**
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* Function to read several images files (typically one) as specified
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* on the command line, and return them in an ImageList
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*/
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ImageList getImagesFromFiles(osg::ArgumentParser& arguments)
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{
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ImageList imageList;
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for(int i=1;i<arguments.argc();++i)
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{
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if (!arguments.isOption(i))
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{
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// not an option so assume string is a filename.
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osg::Image *image = osgDB::readImageFile( arguments[i] );
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if (image)
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{
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imageList.push_back(image);
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}
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}
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}
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if (imageList.size()==0)
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{
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osg::notify(osg::WARN) << "No image data loaded."<<endl;
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}
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return imageList;
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}
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/** create 2,2 square with center at 0,0,0 and aligned along the XZ plan */
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osg::Drawable* createSquare(float textureCoordMax=1.0f)
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{
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// set up the Geometry.
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osg::Geometry* geom = new osg::Geometry;
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osg::Vec3Array* coords = new osg::Vec3Array(4);
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(*coords)[0].set(-1.0f,0.0f,1.0f);
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(*coords)[1].set(-1.0f,0.0f,-1.0f);
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(*coords)[2].set(1.0f,0.0f,-1.0f);
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(*coords)[3].set(1.0f,0.0f,1.0f);
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geom->setVertexArray(coords);
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osg::Vec3Array* norms = new osg::Vec3Array(1);
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(*norms)[0].set(0.0f,-1.0f,0.0f);
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geom->setNormalArray(norms);
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geom->setNormalBinding(osg::Geometry::BIND_OVERALL);
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osg::Vec2Array* tcoords = new osg::Vec2Array(4);
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(*tcoords)[0].set(0.0f,textureCoordMax);
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(*tcoords)[1].set(0.0f,0.0f);
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(*tcoords)[2].set(textureCoordMax,0.0f);
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(*tcoords)[3].set(textureCoordMax,textureCoordMax);
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geom->setTexCoordArray(0,tcoords);
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geom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUADS,0,4));
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return geom;
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}
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osg::Node* createTexturedItem(const osg::Vec3& offset,osg::Texture2D* texture,osg::Node* geometry)
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{
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// create a tranform node to position each square in appropriate
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// place and also to add individual texture set to it, so that
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// that state is inherited down to its children.
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osg::MatrixTransform* local_transform = new osg::MatrixTransform;
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local_transform->postMult(osg::Matrix::translate(offset));
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// create the StateSet to store the texture data
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osg::StateSet* stateset = new osg::StateSet;
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stateset->setTextureAttributeAndModes(0,texture,osg::StateAttribute::ON);
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// turn the face culling off so you can see the texture from
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// all angles.
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stateset->setMode(GL_CULL_FACE,osg::StateAttribute::OFF);
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// attach the setset to tranform node.
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local_transform->setStateSet(stateset);
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// add the geode to the transform.
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local_transform->addChild(geometry);
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return local_transform;
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}
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osg::Node* createLayer(const osg::Vec3& offset,osg::Image* image,osg::Node* geometry,osg::Node* geometryRep)
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{
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if (image==NULL) return NULL;
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osg::MatrixTransform* top_transform = new osg::MatrixTransform;
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top_transform->postMult(osg::Matrix::translate(offset));
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osg::Vec3 local_offset(0.0f,0.0f,0.0f);
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osg::Vec3 local_delta(3.0f,0.0f,0.0f);
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// // use DrawPixels drawable to draw a pixel image.
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// {
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//
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// osg::DrawPixels* drawimage = new osg::DrawPixels;
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// drawimage->setPosition(local_offset);
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// drawimage->setImage(image);
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//
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// osg::Geode* geode = new osg::Geode;
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// geode->addDrawable(drawimage);
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//
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// // add the transform node to root group node.
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// top_transform->addChild(geode);
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//
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// local_offset += local_delta;
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// }
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// defaults mipmapped texturing.
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{
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// create the texture attribute
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osg::Texture2D* texture = new osg::Texture2D;
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texture->setImage(image);
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// add the transform node to root group node.
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top_transform->addChild(createTexturedItem(local_offset,texture,geometry));
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local_offset += local_delta;
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// top_transform->setUpdateCallback(new TextureCallback(texture));
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}
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// bilinear
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{
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// create the texture attribute
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osg::Texture2D* texture = new osg::Texture2D;
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texture->setImage(image);
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// set up bilinear filtering.
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texture->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR_MIPMAP_NEAREST);
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texture->setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::LINEAR);
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// add the transform node to root group node.
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top_transform->addChild(createTexturedItem(local_offset,texture,geometry));
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local_offset += local_delta;
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}
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// trilinear
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{
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// create the texture attribute
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osg::Texture2D* texture = new osg::Texture2D;
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texture->setImage(image);
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// set up trilinear filtering.
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texture->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR_MIPMAP_LINEAR);
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texture->setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::LINEAR);
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// add the transform node to root group node.
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top_transform->addChild(createTexturedItem(local_offset,texture,geometry));
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local_offset += local_delta;
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}
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// anisotropic
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{
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// create the texture attribute
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osg::Texture2D* texture = new osg::Texture2D;
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texture->setImage(image);
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// set up anistropic filtering.
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texture->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR_MIPMAP_LINEAR);
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texture->setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::LINEAR);
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texture->setMaxAnisotropy(2.0f);
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// add the transform node to root group node.
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top_transform->addChild(createTexturedItem(local_offset,texture,geometry));
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local_offset += local_delta;
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}
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// arb compression
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{
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// create the texture attribute
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osg::Texture2D* texture = new osg::Texture2D;
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texture->setImage(image);
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texture->setInternalFormatMode(osg::Texture2D::USE_ARB_COMPRESSION);
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// add the transform node to root group node.
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top_transform->addChild(createTexturedItem(local_offset,texture,geometry));
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local_offset += local_delta;
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}
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// s3tc_dxt1 compression
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{
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// create the texture attribute
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osg::Texture2D* texture = new osg::Texture2D;
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texture->setImage(image);
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texture->setInternalFormatMode(osg::Texture2D::USE_S3TC_DXT1_COMPRESSION);
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// add the transform node to root group node.
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top_transform->addChild(createTexturedItem(local_offset,texture,geometry));
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local_offset += local_delta;
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}
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// default wrap mode. (osg::Texture2D::CLAMP)
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{
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// create the texture attribute
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osg::Texture2D* texture = new osg::Texture2D;
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texture->setImage(image);
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// add the transform node to root group node.
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top_transform->addChild(createTexturedItem(local_offset,texture,geometryRep));
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local_offset += local_delta;
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}
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// clamp-to-edge mode.
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{
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// create the texture attribute
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osg::Texture2D* texture = new osg::Texture2D;
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texture->setImage(image);
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texture->setWrap(osg::Texture2D::WRAP_S,osg::Texture2D::CLAMP_TO_EDGE);
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texture->setWrap(osg::Texture2D::WRAP_T,osg::Texture2D::CLAMP_TO_EDGE);
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// add the transform node to root group node.
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top_transform->addChild(createTexturedItem(local_offset,texture,geometryRep));
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local_offset += local_delta;
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}
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// repeat wrap mode.
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{
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// create the texture attribute
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osg::Texture2D* texture = new osg::Texture2D;
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texture->setImage(image);
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texture->setWrap(osg::Texture2D::WRAP_S,osg::Texture2D::REPEAT);
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texture->setWrap(osg::Texture2D::WRAP_T,osg::Texture2D::REPEAT);
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// add the transform node to root group node.
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top_transform->addChild(createTexturedItem(local_offset,texture,geometryRep));
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local_offset += local_delta;
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}
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// mirror wrap mode.
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{
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// create the texture attribute
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osg::Texture2D* texture = new osg::Texture2D;
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texture->setImage(image);
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texture->setWrap(osg::Texture2D::WRAP_S,osg::Texture2D::MIRROR);
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texture->setWrap(osg::Texture2D::WRAP_T,osg::Texture2D::MIRROR);
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// add the transform node to root group node.
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top_transform->addChild(createTexturedItem(local_offset,texture,geometryRep));
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local_offset += local_delta;
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}
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return top_transform;
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}
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osg::Node* createModelFromImages(ImageList& imageList)
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{
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if (imageList.empty()) return NULL;
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// create the root node which will hold the model.
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osg::Group* root = new osg::Group();
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// create a single drawable to be shared by each texture instance.
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osg::Drawable* drawable_noTexCoodRep = createSquare(1.0f);
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// add the drawable into a single goede to be shared...
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osg::Geode* geode_noTexCoodRep = new osg::Geode();
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geode_noTexCoodRep->addDrawable(drawable_noTexCoodRep);
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// create a single drawable to be shared by each texture instance.
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osg::Drawable* drawable_texCoodRep = createSquare(2.0f);
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// add the drawable into a single goede to be shared...
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osg::Geode* geode_texCoodRep = new osg::Geode();
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geode_texCoodRep->addDrawable(drawable_texCoodRep);
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osg::Vec3 offset(0.0f,0.0f,0.0f);
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osg::Vec3 delta(0.0f,0.0f,3.0f);
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// step through the image list processing each image in turn.
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for(ImageList::iterator itr=imageList.begin();
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itr!=imageList.end();
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++itr)
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{
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// add the transform node to root group node.
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root->addChild(createLayer(offset,itr->get(),geode_noTexCoodRep,geode_texCoodRep));
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offset += delta;
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}
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return root;
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}
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int main( int argc, char **argv )
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{
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// use an ArgumentParser object to manage the program arguments.
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osg::ArgumentParser arguments(&argc,argv);
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// set up the usage document, in case we need to print out how to use this program.
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arguments.getApplicationUsage()->setCommandLineUsage(arguments.getProgramName()+" [options] filename ...");
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arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
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// construct the viewer.
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osgProducer::Viewer viewer(arguments);
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// set up the value with sensible default event handlers.
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viewer.setUpViewer(osgProducer::Viewer::STANDARD_SETTINGS);
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// get details on keyboard and mouse bindings used by the viewer.
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viewer.getUsage(*arguments.getApplicationUsage());
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// if user request help write it out to cout.
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if (arguments.read("-h") || arguments.read("--help"))
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{
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arguments.getApplicationUsage()->write(std::cout);
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return 1;
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}
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// any option left unread are converted into errors to write out later.
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arguments.reportRemainingOptionsAsUnrecognized();
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// report any errors if they have occured when parsing the program aguments.
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if (arguments.errors())
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{
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arguments.writeErrorMessages(std::cout);
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return 1;
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}
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// load the images specified on command line
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ImageList imageList = getImagesFromFiles(arguments);
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if (!imageList.empty())
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{
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// create a model from the images.
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osg::Node* rootNode = createModelFromImages(imageList);
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imageList.clear();
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// add model to viewer.
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viewer.setSceneData( rootNode );
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// create the windows and run the threads.
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viewer.realize(Producer::CameraGroup::ThreadPerCamera);
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while( !viewer.done() )
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{
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// wait for all cull and draw threads to complete.
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viewer.sync();
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// update the scene by traversing it with the the update visitor which will
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// call all node update callbacks and animations.
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viewer.update();
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// fire off the cull and draw traversals of the scene.
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viewer.frame();
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}
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// wait for all cull and draw threads to complete before exit.
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viewer.sync();
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}
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else
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{
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return 0;
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}
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return 0;
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}
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