MRMeshThickness.h

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#pragma once
 
#include "MRMeshFwd.h"
#include "MRMeshProject.h"
#include <cfloat>
#include <optional>
 
namespace MR
{
 
[[nodiscard]] MRMESH_API std::optional<VertScalars> computeRayThicknessAtVertices( const Mesh& mesh, const ProgressCallback & progress = {} );
[[deprecated]] MRMESH_API VertScalars computeThicknessAtVertices( const Mesh& mesh );
 
struct MeshPoint
{
    MeshTriPoint triPoint; 
    Vector3f pt;           
    Vector3f inDir;        
    FacePredicate notIncidentFaces; 
 
    MRMESH_API void set( const Mesh& mesh, const MeshTriPoint & p );
};
 
[[nodiscard]] MRMESH_API MeshIntersectionResult rayInsideIntersect( const Mesh& mesh, const MeshPoint & m, float rayEnd = FLT_MAX );
[[nodiscard]] MRMESH_API MeshIntersectionResult rayInsideIntersect( const Mesh& mesh, VertId v, float rayEnd = FLT_MAX );
 
// Shrinking sphere: A parallel algorithm for computing the thickness of 3D objects
// https://www.cad-journal.net/files/vol_13/CAD_13(2)_2016_199-207.pdf
 
struct InSphereSearchSettings
{
    bool insideAndOutside = false;
 
    float maxRadius = 1;
 
    int maxIters = 16;
 
    float minShrinkage = 0.99999f;
};
 
struct InSphere
{
    Vector3f center;
    float radius = 0;
    MeshProjectionResult oppositeTouchPoint; 
};
 
[[nodiscard]] MRMESH_API InSphere findInSphere( const Mesh& mesh, const MeshPoint & m, const InSphereSearchSettings & settings );
[[nodiscard]] MRMESH_API InSphere findInSphere( const Mesh& mesh, VertId v, const InSphereSearchSettings & settings );
 
[[nodiscard]] MRMESH_API std::optional<VertScalars> computeInSphereThicknessAtVertices( const Mesh& mesh,
    const InSphereSearchSettings & settings, const ProgressCallback & progress = {} );
 
} // namespace MR