Differential D15982 Diff 56818 source/blender/nodes/geometry/nodes/node_geo_input_mesh_face_area.cc

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	{			{
	b.add_output<decl::Float>(N_("Area"))			b.add_output<decl::Float>(N_("Area"))
	.field_source()			.field_source()
	.description(N_("The surface area of each of the mesh's faces"));			.description(N_("The surface area of each of the mesh's faces"));
	}			}

	static VArray<float> construct_face_area_varray(const Mesh &mesh, const eAttrDomain domain)			static VArray<float> construct_face_area_varray(const Mesh &mesh, const eAttrDomain domain)
	{			{
	const Span<MVert> verts = mesh.verts();			const Span<float3> positions = mesh.positions();
	const Span<MPoly> polys = mesh.polys();			const Span<MPoly> polys = mesh.polys();
	const Span<MLoop> loops = mesh.loops();			const Span<MLoop> loops = mesh.loops();

	auto area_fn = [verts, polys, loops](const int i) -> float {			auto area_fn = [positions, polys, loops](const int i) -> float {
	const MPoly &poly = polys[i];			const MPoly &poly = polys[i];
	return BKE_mesh_calc_poly_area(&poly, &loops[poly.loopstart], verts.data());			return BKE_mesh_calc_poly_area(
				&poly, &loops[poly.loopstart], reinterpret_cast<const float(*)[3]>(positions.data()));
	};			};

	return mesh.attributes().adapt_domain<float>(			return mesh.attributes().adapt_domain<float>(
	VArray<float>::ForFunc(polys.size(), area_fn), ATTR_DOMAIN_FACE, domain);			VArray<float>::ForFunc(polys.size(), area_fn), ATTR_DOMAIN_FACE, domain);
	}			}

	class FaceAreaFieldInput final : public bke::MeshFieldInput {			class FaceAreaFieldInput final : public bke::MeshFieldInput {
	public:			public:
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