Hi Ethan, Histogram computation is a very good example for compute shader use.
If you want to use real time histogram computation in production code, my advaice is to follow these 2 links : http://http.developer.nvidia.com/GPUGems3/gpugems3_ch41.html http://developer.amd.com/wordpress/media/2012/10/GPUHistogramGeneration_I3D07.pdf I've implemented this, using geometry shaders, and it is : - very efficient if you configure properly the amount of data processed by each shader stage, and take benefits of linear texture sampling - simple to develop (it's easy to make a simple implementation and then work on it to optimize performances) - can be executed on a (really) wide range of hardware. - very scalable (you can easily configure the amount of input texture pixels be to processed) This histogram is used in several released applications to compute min/max/mean/geometric mean/standard deviation of the rendered scene. Then adaptative tone mapping is applied using these metrics as input. IMHO, the main problem in using compute shaders is the target hardware which have to be compliant. Cheers, Aurelien ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=57016#57016 _______________________________________________ osg-submissions mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-submissions-openscenegraph.org
