Hi,all I was trying to save a render-to-texture image file many ways, however, failed each time. when i attach texture to camera.it works fine. but i attach image to camera. it doesn't work right. I saved the image data to .jpg, .png, .bmp format . but when i double-click the saved image file, there's nothing but blank.and when i tried do the same thing in the osg example osgprerender, the problem was still that. i use osgDB::writeImageFile(*image, "d:\\data\\test.bmp"); why? Is there someone met this problem? How did you fix it?
[code] osg::ref_ptr<osg::Texture2D> colorMap = new osg::Texture2D; colorMap->setTextureSize(width, height); colorMap->setInternalFormat(GL_RGBA); colorMap->setFilter(osg::Texture2D::MIN_FILTER, osg::Texture2D::LINEAR); colorMap->setFilter(osg::Texture2D::MAG_FILTER, osg::Texture2D::LINEAR); osg::ref_ptr<osg::Texture2D> depthMap = new osg::Texture2D; depthMap->setTextureSize(width,height); depthMap->setInternalFormat(GL_DEPTH_COMPONENT); depthMap->setFilter(osg::Texture2D::MIN_FILTER, osg::Texture2D::LINEAR); depthMap->setFilter(osg::Texture2D::MAG_FILTER, osg::Texture2D::LINEAR); osg::ref_ptr<osg::Camera> camera = new osg::Camera; camera->setClearColor(osg::Vec4(1.0f, 1.0f, 1.0f, 1.0f)); camera->setClearMask(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); camera->setReferenceFrame(osg::Transform::RELATIVE_RF); camera->setProjectionMatrixAsFrustum(-proj_right, proj_right, -proj_top, proj_top, znear, zfar); //camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF); camera->setProjectionMatrix(osg::Matrixd::identity()); camera->setViewMatrixAsLookAt(bs.center()-osg::Vec3(0.0f,2.0f,0.0f)*bs.radius(),bs.center(),osg::Vec3(0.0f,0.0f,1.0f)); camera->setViewMatrix(osg::Matrixd::identity()); camera->setViewport(0, 0, width, height); camera->setRenderOrder(osg::Camera::PRE_RENDER); camera->setRenderTargetImplementation(osg::Camera::FRAME_BUFFER_OBJECT); camera->attach(osg::Camera::DEPTH_BUFFER, depthMap); camera->attach(osg::Camera::COLOR_BUFFER, colorMap); osg::ref_ptr<osg::Image> image = new osg::Image; image->allocateImage(width, height, 1, GL_RGBA, GL_FLOAT); image->setInternalTextureFormat(GL_RGBA); camera->attach(osg::Camera::COLOR_BUFFER, image.get()); osg::ref_ptr<osg::Geode> geo = createCube(colorMap, depthMap); camera->addChild(modelNode.get()); osg::ref_ptr<osg::Group> parent = new osg::Group; parent->addChild(geo.get()); parent->addChild(camera.get()); osgDB::writeImageFile(*image, "test.bmp"); //colorMap->setImage(0, image); return parent.get(); [/code] ... Thank you! Cheers, sun ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=38548#38548 _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
