Re: [osg-users] OsgVolume. Rendering of multiple intersected volumes
HI Jesus, osgVolume doesn't yet support multiple over-lapping volumes. To handle multiple intersecting volumes one will have to have the osgVolume rendering back end and shaders handle both volumes at the same time where the volumes overlap and separately handle the areas where only one volume has influence. Robert. On 22 September 2014 10:29, Jesús Zarzoso wrote: > Hello. > > We are using osgVolume in our latest project. It is working perfectly as > long as we don´t try to render more than one volume in the same view, and > those volumes intersect with each other. In this case, we are having what > it looks as depth problems. Please look at the attached images. > First of all, is this case supported by the OsgVolume library? > > We are using the MultipassTechnique, so, at the root of the graph, there > is a VolumeScene node. Then, some levels below, each volume is created as > an individual Volume node, with its corresponding VolumeTile, ImageLayer > and their Locators. We have tried also using a unique Volume node and > creating multiple VolumeTiles, but with the same result. > > Regarding the properties set to the layers, we are using this code: > > osgVolume::AlphaFuncProperty* ap = new >>> osgVolume::AlphaFuncProperty(0.02f); >> >> osgVolume::SampleDensityProperty* sd = new >>> osgVolume::SampleDensityProperty(0.001); >> >> osgVolume::SampleDensityWhenMovingProperty* sdwm = new >>> osgVolume::SampleDensityWhenMovingProperty(0.002); >> >> > > The OSG version is the Developer Release 3.3.2.on Windows 7 64 bit. > > Any clue why this is happening? > > Thank you. > Jesús. > > -- > Jesús Zarzoso > Mirage Technologies S.L > http://www.mirage-tech.com > > ___ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OsgVolume. Rendering of multiple intersected volumes
Hello Robert. Thanks for your quick reply! We´ll try to solve this problem ourselves then. Regards. Jesús. 2014-09-22 11:37 GMT+02:00 Robert Osfield : > HI Jesus, > > osgVolume doesn't yet support multiple over-lapping volumes. > > To handle multiple intersecting volumes one will have to have the > osgVolume rendering back end and shaders handle both volumes at the same > time where the volumes overlap and separately handle the areas where only > one volume has influence. > > Robert. > > On 22 September 2014 10:29, Jesús Zarzoso > wrote: > >> Hello. >> >> We are using osgVolume in our latest project. It is working perfectly as >> long as we don´t try to render more than one volume in the same view, and >> those volumes intersect with each other. In this case, we are having what >> it looks as depth problems. Please look at the attached images. >> First of all, is this case supported by the OsgVolume library? >> >> We are using the MultipassTechnique, so, at the root of the graph, there >> is a VolumeScene node. Then, some levels below, each volume is created as >> an individual Volume node, with its corresponding VolumeTile, ImageLayer >> and their Locators. We have tried also using a unique Volume node and >> creating multiple VolumeTiles, but with the same result. >> >> Regarding the properties set to the layers, we are using this code: >> >> osgVolume::AlphaFuncProperty* ap = new osgVolume::AlphaFuncProperty(0.02f); >>> >>> osgVolume::SampleDensityProperty* sd = new osgVolume::SampleDensityProperty(0.001); >>> >>> osgVolume::SampleDensityWhenMovingProperty* sdwm = new osgVolume::SampleDensityWhenMovingProperty(0.002); >>> >>> >> >> The OSG version is the Developer Release 3.3.2.on Windows 7 64 bit. >> >> Any clue why this is happening? >> >> Thank you. >> Jesús. >> >> -- >> Jesús Zarzoso >> Mirage Technologies S.L >> http://www.mirage-tech.com >> >> ___ >> osg-users mailing list >> osg-users@lists.openscenegraph.org >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> >> > > ___ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > -- Jesús Zarzoso Mirage Technologies S.L http://www.mirage-tech.com ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
