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feat: VEC3 automatic normals generation

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MihailRis 2024-10-26 13:13:47 +03:00
parent 016d91704b
commit 75805642b5
1 changed files with 7 additions and 0 deletions
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7
src/coders/vec3.cpp
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@ -102,6 +102,13 @@ static model::Mesh build_mesh(
}
if (normals) {
vertex.normal = normals[indices[i * attrsCount + normalsIndex]];
} else if (coords) {
// Flat normal calculation
int idx = (i / 3) * 3;
auto a = coords[indices[idx * attrsCount + coordsIndex]];
auto b = coords[indices[(idx + 1) * attrsCount + coordsIndex]];
auto c = coords[indices[(idx + 2) * attrsCount + coordsIndex]];
vertex.normal = glm::normalize(glm::cross(b - a, c - a));
}
vertices.push_back(std::move(vertex));
}