GenericIndexedMesh.h

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// ----------------------------------------------------------------------------
// -                        CloudViewer: www.cloudViewer.org                  -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2024 www.cloudViewer.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
 
#pragma once
 
// Local
#include "GenericMesh.h"
 
namespace cloudViewer {
 
struct VerticesIndexes {
    union {
        struct {
            unsigned i1, i2, i3;
        };
        unsigned i[3];
    };
 
    VerticesIndexes(unsigned _i1, unsigned _i2, unsigned _i3)
        : i1(_i1), i2(_i2), i3(_i3) {}
 
    VerticesIndexes() : i1(0), i2(0), i3(0) {}
 
    inline unsigned int getDimension() const { return 3; }
};
 
 
class CV_CORE_LIB_API GenericIndexedMesh : public GenericMesh {
public:
    GenericIndexedMesh() = default;
    ~GenericIndexedMesh() override = default;
 
 
    virtual GenericTriangle* _getTriangle(unsigned triangleIndex) = 0;
 
 
    virtual VerticesIndexes* getTriangleVertIndexes(unsigned triangleIndex) = 0;
 
 
    virtual void getTriangleVertices(unsigned triangleIndex,
                                     CCVector3& A,
                                     CCVector3& B,
                                     CCVector3& C) const = 0;
    virtual void getTriangleVertices(unsigned triangleIndex,
                                     double A[3],
                                     double B[3],
                                     double C[3]) const = 0;
 
 
    virtual VerticesIndexes* getNextTriangleVertIndexes() = 0;
 
    virtual bool normalsAvailable() const { return false; }
 
 
    virtual bool interpolateNormals(unsigned triIndex,
                                    const CCVector3& P,
                                    CCVector3& N) {
        (void)triIndex;
        (void)P;
        (void)N;
        return false;
    }
};
 
}  // namespace cloudViewer