PointsBehindMesh.h

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#pragma once
#include "Samplers/Sampler.h"
#include "Topology/PolygonSet.h"
#include "Topology/TriangleSet.h"
#include "NormalVisualization.h"
#include "Collision/NeighborPointQuery.h"
#include "Algorithm/Scan.h"
 
namespace dyno
{
 
    /*
    *   @brief£ºThe node is to generate Points benhind triangle meshes.
    *
    *   @Implementation:
    *       #Step1: Square plane regions are generating for each triangle mesh;
    *       #Step2: Caculate the basic vectors for every square plane region, and generate the candinite points in the square plane region;
    *       #Step3: Determine whether the candidate points are inside the triangular facet, and delete the points outside the relative meshes;
    *       #Step4: Use remaining candidate points as seeds, and multi-layer Points are generated by expanding along the direction of mesh normals;
    *       #Step5: Remove the points that are too close;
    *       #Step6: Finished.
    */
 
 
    template<typename TDataType>
    class PointsBehindMesh : public Sampler<TDataType>
    {
        DECLARE_TCLASS(PointsBehindMesh, TDataType);
 
    public:
        typedef typename TDataType::Real Real;
        typedef typename TDataType::Coord Coord;
        typedef typename TDataType::Matrix Matrix;
        typedef typename TopologyModule::Triangle Triangle;
 
        PointsBehindMesh();
        ~PointsBehindMesh() override {};
 
        DEF_VAR(Real, Thickness, Real(0.2), "");
 
        DEF_VAR(Real, SamplingDistance, Real(0.05), "");
 
        DEF_VAR(bool, GeneratingDirection, true, "");
 
        DEF_INSTANCE_IN(TriangleSet<TDataType>, TriangleSet, "");
 
        DEF_ARRAY_STATE(Coord, Position, DeviceType::GPU, "");
 
        DEF_INSTANCE_STATE(TriangleSet<TDataType>, Plane, "");
 
        DEF_ARRAY_STATE(Coord, PointNormal, DeviceType::GPU, "Normal Vector of the point set");
 
        DEF_VAR_OUT(bool, PointGrowthDirection, "");
 
        DEF_ARRAY_STATE(int, PointBelongTriangleIndex, DeviceType::GPU, "");
 
        DEF_VAR_OUT(Real, SamplingDistance, "");
 
    protected:
        void resetStates() override;
 
    private:
 
 
        DArray<Coord> msquare_1, msquare_2, msquare_3, msquare_4;
 
        DArray<Coord> mBasicVector_x, mBasicVector_y, mBasicVector_z;
 
        DArray<Coord> mVerticesTempt;
 
        DArray<Triangle> mTriangleTempt;
 
        DArray<int> mThinPointSize;
 
        DArray<int> mThickPointSize;
 
        DArray<Coord> mThickPoints;
 
        DArray<Coord> mThinPoints;
 
        DArray<bool> mRemovingFlag;
 
        DArray<int> mPointOfTriangleId;
 
        DArray<int> mSeedOfTriangleId;
 
        DArray<Coord> mTriangleNormal;
 
        std::shared_ptr<NeighborPointQuery<TDataType>> m_NeighborPointQuery;
 
        Scan<int> scan;
    };
 
    IMPLEMENT_TCLASS(PointsBehindMesh, TDataType);
}