Render radar data with the DVR mode of the raycaster actor
Adapt the existing raycaster actor to allow it to render data not only from StructuredGrids but also RadarGrids.
- Add a sampleDataAtPos subroutine for radar data in volume_sample_utils.glsl, and add functions used by it in volume_radar_utils.
- Add case distinctions between StructuredGrid/RadarGrid where necessary in the raycaster actor.
Closes #463 (closed)
Edited by Susanne Fuchs