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Fix #123171: Mesh edit mode lines index buffer crash with curve modifier

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I didn't think the BMesh extraction mode could arrive at the case where
only loose edges are requested, but turns out it can because of the
mesh wrapper system where the evaluated mesh is actually a BMesh with
deformed positions.
This commit is contained in:
Hans Goudey
2024-06-13 10:22:11 -04:00
parent e639c3d6e2
commit 2d4c624a87
1 changed files with 9 additions and 0 deletions
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9
source/blender/draw/intern/mesh_extractors/extract_mesh_ibo_lines.cc
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@@ -193,6 +193,15 @@ static void extract_lines_bm(const MeshRenderData &mr,
no_loose_wire = visible_loose_edges.is_empty();
if (DRW_ibo_requested(lines_loose) && !DRW_ibo_requested(lines)) {
GPUIndexBufBuilder builder;
GPU_indexbuf_init(&builder, GPU_PRIM_LINES, visible_loose_edges.size(), max_index);
MutableSpan<uint2> data = GPU_indexbuf_get_data(&builder).cast<uint2>();
fill_loose_lines_ibo(mr, visible_loose_edges, data);
GPU_indexbuf_build_in_place_ex(&builder, 0, max_index, false, lines_loose);
return;
}
const IndexMask all_loose_edges = IndexMask::from_indices(mr.loose_edges, memory);
const IndexMask non_loose_edges = all_loose_edges.complement(IndexRange(bm.totedge), memory);
const IndexMask visible_non_loose_edges = IndexMask::from_predicate(