DBilinearPatch3d.h

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/*--------------------------------------------------------------------------------------+
|
|   Supplied under applicable software license agreement.
|
|   Copyright (c) 2018 Bentley Systems, Incorporated. All rights reserved.
|
+---------------------------------------------------------------------------------------*/
#pragma once

BEGIN_BENTLEY_GEOMETRY_NAMESPACE

struct GEOMDLLIMPEXP DBilinearPatch3d
{
DPoint3d point[2][2];
DBilinearPatch3d ();

DBilinearPatch3d (DPoint3dCR xyz0, DPoint3dCR xyz10, DPoint3dCR xyz01, DPoint3dCR xyz11);
DBilinearPatch3d (DPoint2dCR xyz0, DPoint2dCR xyz10, DPoint2dCR xyz01, DPoint2dCR xyz11);

DBilinearPatch3d (DSegment3dCR lowerEdge, DSegment3dCR upperEdge);

DPoint3d Evaluate (double u, double v) const;
void Evaluate (double u, double v, DPoint3dR xyz, DVec3dR dXdu, DVec3dR dXdv) const;
void EvaluateNormal (double u, double v, DPoint3dR xyz, DVec3dR unitNormal) const;

// fill a grid with (at least 2 points) on each edge.
void EvaluateGrid (int numUPoint, int numVPoint, bvector<DPoint3d> &gridPoints) const;

bool PerpendicularsOnBoundedPatch (DPoint3dCR spacePoint, bvector<DPoint2d> &uv) const;
DSegment3d GetCCWEdge (int i) const;

DVec3d GetUEdgeVector (int i) const;

DVec3d GetDiagonalFrom00 () const;
DVec3d GetDiagonalFrom01 () const;


DVec3d GetVEdgeVector (int i) const;

bool IsParallelogram () const;

bool IsPlanar () const;

bool IsPlanar (double angleTol) const;
};

END_BENTLEY_GEOMETRY_NAMESPACE