HI Evan, My best guess is that the packing of the data in each row is out, as your Image::setData(..) call doesn't supply all the parameters explicitly it will default to a packing of 1 byte.
For instance if the packing for your source data is 4 bytes, and all you previous image data has a width with multiple of 4 then there won't be any mismatch when using a 1 byte packing as it will select the same width. However, if you use a width such as 3 then the source data with a 4 byte packing would round up to 4 bytes width, but the osg::Image::setImage() call you are using says just use 1 byte packing so selects a width of 3. This will result in a each successive row starting 1 byte off and leading to the "twist" you see. Check the spec of your image reading code/file format to see what the row packing is. Also have a look at the docs for osg::Image::setImage(..), note the optional packing and rowLength parameters. Robert On 18 February 2017 at 16:38, Evan Tsai <[email protected]> wrote: > Thank you very much for helping. Below is how we make the call. > > This has been working fine until very recently we received scan data from > some CBCT scanners that we haven't encountered before. However those scans > could be viewed correctly in all popular DICOM viewers in the market. As > mentioned, I also took the pixel data and dumped it into a .bmp file, which > looks correct. So the only possibility seems to be that we are missing some > setting here...... > > I did try changing the texture coordinates around but that doesn't change the > twisted nature of the display. > > I also tried changing `packing' from 1 to 0 but that crashes the software. > > Is there anything in particular that one needs to set for `rowLength'? > > > > osg::Geode* pGeode = new osg::Geode; > > osg::Vec3 v1(pBottomLeft[0], pBottomLeft[1], pBottomLeft[2]); > osg::Vec3 v2(pBottomRight[0], pBottomRight[1], pBottomRight[2]); > osg::Vec3 v3(pTopRight[0], pTopRight[1], pTopRight[2]); > osg::Vec3 v4(pTopLeft[0], pTopLeft[1], pTopLeft[2]); > > osg::Geometry* geom = new osg::Geometry; > geom->setDataVariance(osg::Object::DYNAMIC); > osg::Vec3Array* vertices = new osg::Vec3Array(4); > (*vertices)[0] = v1; > (*vertices)[1] = v2; > (*vertices)[2] = v3; > (*vertices)[3] = v4; > geom->setVertexArray(vertices); > > osg::Vec2Array* texcoords = new osg::Vec2Array(4); > (*texcoords)[0].set(0.0f, 0.0f); > (*texcoords)[1].set(1, 0.0f); > (*texcoords)[2].set(1, 1); > (*texcoords)[3].set(0.0f, 1); > > geom->setTexCoordArray(0, texcoords); > > osg::ref_ptr<osg::Vec3Array> normals = new osg::Vec3Array(1); > (*normals)[0].set(0.0f, -1.0f, 0.0f); > geom->setNormalArray(normals, osg::Array::BIND_OVERALL); > osg::Vec4Array* colors = new osg::Vec4Array(1); > (*colors)[0].set(1.0f, 1.0f, 1.0f, 1.0f); > geom->setColorArray(colors, osg::Array::BIND_OVERALL); > > geom->addPrimitiveSet(new osg::DrawArrays(GL_QUADS, 0, 4)); > geom->setUseDisplayList(false); > osg::ref_ptr<osg::Image> img = new osg::Image; > > img->setImage(image.GetWidth(), image.GetHeight(), 1, > GL_DEPTH_COMPONENT, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, > image.GetPixelData(), > osg::Image::USE_NEW_DELETE); > > //osg::ref_ptr<osg::Image> img = > osgDB::readRefImageFile("C:\\Users\\rupeshb\\Pictures\\error.bmp"); > > //osg::ref_ptr<osg::Image> img = osgDB::readRefImageFile(filename); > > osg::ref_ptr<osg::Texture2D> texture = new osg::Texture2D(img); > texture->setFilter(osg::Texture::MIN_FILTER, osg::Texture::LINEAR); > texture->setFilter(osg::Texture::MAG_FILTER, osg::Texture::LINEAR); > osg::ref_ptr<osg::TexMat> texmat = new osg::TexMat; > texmat->setScaleByTextureRectangleSize(true); > // setup state > osg::ref_ptr<osg::StateSet> state = geom->getOrCreateStateSet(); > state->setTextureAttributeAndModes(0, texture, > osg::StateAttribute::ON | osg::StateAttribute::PROTECTED); > state->setTextureAttributeAndModes(0, texmat, osg::StateAttribute::ON > | osg::StateAttribute::PROTECTED); > > state->setMode(GL_LIGHTING, osg::StateAttribute::OFF); > > pGeode->addDrawable(geom); > addChild(pGeode); > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=70254#70254 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
