MRMesh/MRIntersectionContour.h

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#pragma once
 
#include "MRMeshCollidePrecise.h"
 
namespace MR
{
 
struct OneMeshContour;
using OneMeshContours = std::vector<OneMeshContour>;
 
struct VariableEdgeTri : EdgeTri
{
    bool isEdgeATriB{false};
};
 
using ContinuousContour = std::vector<VariableEdgeTri>;
using ContinuousContours = std::vector<ContinuousContour>;
 
// Combines individual intersections into ordered contours with the properties:
// a. left  of contours on mesh A is inside of mesh B,
// b. right of contours on mesh B is inside of mesh A,
// c. each intersected edge has origin inside meshes intersection and destination outside of it
MRMESH_API ContinuousContours orderIntersectionContours( const MeshTopology& topologyA, const MeshTopology& topologyB, const PreciseCollisionResult& intersections );
 
// Detects contours that fully lay inside one triangle
// returns they indices in contours
MRMESH_API std::vector<int> detectLoneContours( const ContinuousContours& contours );
 
// Removes contours with zero area (do not remove if contour is handle on topology)
// edgesTopology - topology on which contours are represented with edges
// faceContours - lone contours represented by faces (all intersections are in same mesh A face)
// edgeContours - lone contours represented by edges (all intersections are in mesh B edges, edgesTopology: meshB.topology)
MRMESH_API void removeLoneDegeneratedContours( const MeshTopology& edgesTopology, 
    OneMeshContours& faceContours, OneMeshContours& edgeContours );
 
// Removes contours that fully lay inside one triangle from the contours
MRMESH_API void removeLoneContours( ContinuousContours& contours );
 
}