Fix shaders for other sensors that require material switching (ogre2)

[iche033]

Signed-off-by: Ian Chen ichen@osrfoundation.org

🦟 Bug fix

Summary

Follow-up to ##575 and these comments

This PR fixes objects with shader material when there is a thermal camera or a segmentation camera in the scene. These sensor all perform material switching during a render update, and the shader materials should now be correctly restored. Also updated test.

Here is a shader_param_sensors.sdf for testing with ign-gazebo. The cameras should produce correct output and the waves and deformable sphere should be render correctly in the GUI and camera and depth sensors.

Note that the thermal and segmentation cameras do not show the animation of waves and is being addressed in #578 (which has a separate fix for this issue targeting ign-rendering7).

ign gazebo -v 4 -r shader_param_sensors.sdf

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[codecov]

Codecov Report

Merging #579 (29ee7e0) into ign-rendering6 (bb1b1c2) will decrease coverage by 0.02%.
The diff coverage is 48.71%.

❗ Current head 29ee7e0 differs from pull request most recent head bbb4fe0. Consider uploading reports for the commit bbb4fe0 to get more accurate results

@@                Coverage Diff                 @@
##           ign-rendering6     #579      +/-   ##
==================================================
- Coverage           54.35%   54.33%   -0.03%     
==================================================
  Files                 198      198              
  Lines               20170    20187      +17     
==================================================
+ Hits                10964    10969       +5     
- Misses               9206     9218      +12     

Impacted Files	Coverage Δ
ogre2/src/Ogre2MaterialSwitcher.cc	80.24% <ø> (+0.97%)	⬆️
ogre2/src/Ogre2GpuRays.cc	95.06% <40.00%> (-0.02%)	⬇️
ogre2/src/Ogre2SegmentationMaterialSwitcher.cc	59.23% <47.05%> (-1.99%)	⬇️
ogre2/src/Ogre2ThermalCamera.cc	88.31% <52.94%> (-1.29%)	⬇️

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