Native ray-trace renderer - #219
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This PR introduces a native entity ray-tracer for on-the-fly rendering.
Ascent has some rendering artefacts that currently can't be fixed, because they are inherent in the VTK-m backend.
This ray-tracer works in 2D/3D, in cartesian and curviliniear, SR and GR. It renders a clean png, without external dependencies, so it's super easy to ship. It uses the pre-allocated
bckpfields, so there is minimal memory overhead.It is compiled in by default, you just need to add some parameters to your toml file. I will write a detailed doc for this.
Things still to-do:
Here are some example renders for turbulence pgen:
The accretion pgen:
The shock pgen:
And full-dome projections for planetariums: