70 lines
2.4 KiB
C++
70 lines
2.4 KiB
C++
#ifndef slic3r_NormalUtils_hpp_
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#define slic3r_NormalUtils_hpp_
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#include "Point.hpp"
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#include "Model.hpp"
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namespace Slic3r {
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/// <summary>
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/// Collection of static function
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/// to create normals
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/// </summary>
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class NormalUtils
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{
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public:
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using Normal = Vec3f;
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using Normals = std::vector<Normal>;
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NormalUtils() = delete; // only static functions
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enum class VertexNormalType {
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AverageNeighbor,
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AngleWeighted,
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NelsonMaxWeighted
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};
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/// <summary>
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/// Create normal for triangle defined by indices from vertices
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/// </summary>
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/// <param name="indices">index into vertices</param>
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/// <param name="vertices">vector of vertices</param>
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/// <returns>normal to triangle(normalized to size 1)</returns>
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static Normal create_triangle_normal(
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const stl_triangle_vertex_indices &indices,
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const std::vector<stl_vertex> & vertices);
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/// <summary>
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/// Create normals for each vertices
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/// </summary>
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/// <param name="its">indices and vertices</param>
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/// <returns>Vector of normals</returns>
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static Normals create_triangle_normals(const indexed_triangle_set &its);
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/// <summary>
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/// Create normals for each vertex by averaging neighbor triangles normal
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/// </summary>
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/// <param name="its">Triangle indices and vertices</param>
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/// <param name="type">Type of calculation normals</param>
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/// <returns>Normal for each vertex</returns>
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static Normals create_normals(
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const indexed_triangle_set &its,
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VertexNormalType type = VertexNormalType::NelsonMaxWeighted);
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static Normals create_normals_average_neighbor(const indexed_triangle_set &its);
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static Normals create_normals_angle_weighted(const indexed_triangle_set &its);
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static Normals create_normals_nelson_weighted(const indexed_triangle_set &its);
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/// <summary>
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/// Calculate angle of trinagle side.
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/// </summary>
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/// <param name="i">index to indices, define angle point</param>
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/// <param name="indice">address to vertices</param>
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/// <param name="vertices">vertices data</param>
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/// <returns>Angle [in radian]</returns>
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static float indice_angle(int i,
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const Vec3crd & indice,
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const std::vector<stl_vertex> &vertices);
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};
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} // namespace Slic3r
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#endif // slic3r_NormalUtils_hpp_
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