Mesh: Lines index buffer creation improvement #120720
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Reference: blender/blender#120720
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Delete Branch "HooglyBoogly/blender:mesh-extract-lines-fix"
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Implements another phase of #116901, this time for the
lines
andlines_loose
index buffers that store indices for wireframe drawing. The key improvement is
removing loose edge's dependency on the main edge index buffer. That means
for the majority of meshes with no loose edges, edge index extraction can be
completely skipped. Even when there are loose edges, only the loose edges
need to be extracted with wireframe turned off.
Besides that improvement, there are more changes to use data-oriented code
with visible hot loops instead of the virtual function call design used for the
existing mesh extractor system. For this step I completely replaced the
extract_lines
object, which is in line with the general plan for this area.Additionally, hidden edge filtering is done ahead of time using several
IndexMask
operations. This means only indices for visible edges needto be uploaded to the GPU, and no restart index stripping needs to be
performed on macOS.
On my usual test file with 1.9 million vertices, I observed an improvement from
26 to 33 FPS with wireframe off, and from 9.15 to 9.5 FPS with wireframe on.
@blender-bot build