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| author | Dan Goodliffe <dan@randomdan.homeip.net> | 2023-11-26 14:20:28 +0000 |
|---|---|---|
| committer | Dan Goodliffe <dan@randomdan.homeip.net> | 2023-11-26 14:20:28 +0000 |
| commit | 3abe940a22d99939b666bd806214c8b986cb3ed9 (patch) | |
| tree | bba599f39e8b328c3d4911a940a4263781e74a77 /game/geoData.cpp | |
| parent | Merge branch 'ints' into terrain (diff) | |
| download | ilt-3abe940a22d99939b666bd806214c8b986cb3ed9.tar.bz2 ilt-3abe940a22d99939b666bd806214c8b986cb3ed9.tar.xz ilt-3abe940a22d99939b666bd806214c8b986cb3ed9.zip | |
Calculate vertex normals only
Doesn't require half edge normals or face normals, which uses Newell's
method, which results in integer overflow... Not to mention we don't
need all the other normals.
Diffstat (limited to 'game/geoData.cpp')
| -rw-r--r-- | game/geoData.cpp | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/game/geoData.cpp b/game/geoData.cpp index 7710efe..70133a9 100644 --- a/game/geoData.cpp +++ b/game/geoData.cpp @@ -57,8 +57,7 @@ GeoData::loadFromAsciiGrid(const std::filesystem::path & input) }); } } - mesh.update_face_normals(); - mesh.update_vertex_normals(); + mesh.update_vertex_normals_only(); return mesh; }; @@ -77,8 +76,7 @@ GeoData::createFlat(GlobalPosition2D lower, GlobalPosition2D upper, GlobalDistan mesh.add_face(ll, uu, lu); mesh.add_face(ll, ul, uu); - mesh.update_face_normals(); - mesh.update_vertex_normals(); + mesh.update_vertex_normals_only(); return mesh; } @@ -317,3 +315,13 @@ GeoData::findBoundaryStart() const return is_boundary(heh); }); } + +void +GeoData::update_vertex_normals_only() +{ + for (auto vh : all_vertices()) { + Normal3D n; + calc_vertex_normal_correct(vh, n); + this->set_normal(vh, glm::normalize(n)); + } +} |