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In the vrx simulation, the ocean is currently detected by the lidar. … #796

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JonathanWheare
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… where it is expected that the majority of lidar hits are absorbed by water. Generally only wakes and waves will cause hits.

This patch adds a visibility_filter tag to the 3d lidar that will filter water hits, more closely matching the expected behaviour in the field. The corresponding tag is already present in the water mesh.

…where it is expected that the majority of lidar hits are absorbed by water.

This patch adds a visibility_filter tag to the 3d lidar that will filter water hits, more closely matching the expected behaviour in the field.
@JonathanWheare
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This addresses issue #753

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I implemented this in my local code base and it worked perfectly (and fixed a longtime headache of mine). I'm a bit of a git novice so forgive me if I'm doing anything wrong or not following correct procedure, but I wish to approve this commit.

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