are you trying to display an image that has the same size as your screen? If so, you might want to do it with HUD (have a look at osghud example) and with TextureRectangle instead ....
-Nick On Thu, Mar 11, 2010 at 4:29 PM, Akilan Thangamani < [email protected]> wrote: > Hi, > > Extremely sorry for my first question as I was not reading the image file > properly, I couldn't get the display as I thought. But regarding my 2nd > question, I m taking a buffer(filled with image pixels) of size exactly > equivalent to of my screen resolution (1280 * 960). I m trying to display > it in such a way to exactly fit onto my screen without scaling down/up. I > put my code to show the way I create the texture, > > osg::Node* CreateTexImage() > { > osg::BoundingBox bb(0.0f,0.0f,0.0f,1.0f,1.0f,1.0f); > osg::Group* group = new osg::Group; > > osg::Vec3 top_left(bb.xMin(),bb.yMin(),bb.zMax()); > osg::Vec3 bottom_left(bb.xMin(),bb.yMin(),bb.zMin()); > osg::Vec3 bottom_right(bb.xMin(),bb.yMax(),bb.zMin()); > osg::Vec3 top_right(bb.xMin(),bb.yMax(),bb.zMax()); > osg::Vec3 > center(bb.xMin(),(bb.yMin()+bb.yMax())*0.5f,(bb.zMin()+bb.zMax())*0.5f); > float height = bb.zMax()-bb.zMin(); > > osg::Geometry* geom = new osg::Geometry; > > osg::Vec3Array* vertices = new osg::Vec3Array(4); > (*vertices)[0] = top_left; > (*vertices)[1] = bottom_left; > (*vertices)[2] = bottom_right; > (*vertices)[3] = top_right; > geom->setVertexArray(vertices); > > osg::Vec2Array* texcoords = new osg::Vec2Array(4); > (*texcoords)[0].set(0.0f,1.0f); > (*texcoords)[1].set(0.0f,0.0f); > (*texcoords)[2].set(1.0f,0.0f); > (*texcoords)[3].set(1.0f,1.0f); > geom->setTexCoordArray(0,texcoords); > > osg::Vec3Array* normals = new osg::Vec3Array(1); > (*normals)[0].set(1.0f,0.0f,0.0f); > geom->setNormalArray(normals); > geom->setNormalBinding(osg::Geometry::BIND_OVERALL); > > osg::Vec4Array* colors = new osg::Vec4Array(1); > (*colors)[0].set(1.0f,1.0f,1.0f,1.0f); > geom->setColorArray(colors); > geom->setColorBinding(osg::Geometry::BIND_OVERALL); > > geom->addPrimitiveSet(new osg::DrawArrays(GL_QUADS,0,4)); > > osg::Geode* geom_geode = new osg::Geode; > geom_geode->addDrawable(geom); > group->addChild(geom_geode); > > osg::Texture2D* texture = new osg::Texture2D; > texture->setDataVariance(osg::Object::DYNAMIC); > > unsigned char* data; > int width, height; > width=1280; //source_image width > height=960;//source_image height > long size = width * height; > data = new unsigned char[size]; > > //Reading Image of width * height into buffer > for(i=0;i<(width * height); i++) > data[i]=source_image[i]); > > //Setting image > osg::ref_ptr<osg::Image> image = new osg::Image; > image->allocateImage(width, height, 1, GL_LUMINANCE, > GL_UNSIGNED_BYTE); > image->setOrigin(osg::Image::BOTTOM_LEFT); > image->setImage(width, height, 1, GL_LUMINANCE, GL_LUMINANCE, > GL_UNSIGNED_BYTE,data, osg::Image::NO_DELETE); > texture->setImage(image); > > osg::StateSet* stateset = geom->getOrCreateStateSet(); > > stateset->setTextureAttributeAndModes(0,texture,osg::StateAttribute::ON); > > return group; > > } > > Let me understand what needs to be done to fit onto my screen exaxtly > without scaling? > > Thanks > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=25525#25525 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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