kicad/3d-viewer/3d_rendering/3d_render_raytracing/shapes2D/polygon_2d.h

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2015-2016 Mario Luzeiro <mrluzeiro@ua.pt>
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* Copyright (C) 1992-2020 KiCad Developers, see AUTHORS.txt for contributors.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
/**
* @file polygon_2d.h
*/
#ifndef _CPOLYGON2D_H_
#define _CPOLYGON2D_H_
#include "object_2d.h"
#include "../accelerators/container_2d.h"
#include <geometry/shape_poly_set.h>
#include <vector>
typedef struct
{
SFVEC2F m_Start;
float m_inv_JY_minus_IY;
float m_JX_minus_IX;
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} POLYSEGMENT;
typedef struct
{
SFVEC2F m_Start;
SFVEC2F m_End;
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} SEG_NORMALS;
typedef struct
{
SFVEC2F m_Start;
SFVEC2F m_Precalc_slope;
SEG_NORMALS m_Normals;
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} SEGMENT_WITH_NORMALS;
typedef std::vector< POLYSEGMENT > SEGMENTS;
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/**
* List used to test ray2d intersections.
*
* It will be a subset of an original polygon. The normals will be passed already interpolated.
*/
typedef std::vector< SEGMENT_WITH_NORMALS > SEGMENTS_WIDTH_NORMALS;
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/**
* Handle a subset of a polygon.
*
* It can contain multiple closed polygons and holes and us used to test if points are inside.
* A point will be inside the polygon if it is not inside a hole and it is inside an outer polygon.
*/
typedef struct
{
std::vector<SEGMENTS> m_Outers;
std::vector<SEGMENTS> m_Holes;
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} OUTERS_AND_HOLES;
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/**
* Represent a sub polygon block.
*
* This polygon block was created from a general polygon definition that was sub divided and
* to create blocks of polygons. This polygon class represent a sub part of that main polygon.
* There is information for the contours (used to test the ray2d intersection) and a close
* definition of the block polygon to test if a point is inside.
*/
class POLYGON_2D : public OBJECT_2D
{
public:
POLYGON_2D( const SEGMENTS_WIDTH_NORMALS& aOpenSegmentList,
const OUTERS_AND_HOLES& aOuterAndHoles, const BOARD_ITEM& aBoardItem );
bool Overlaps( const BBOX_2D& aBBox ) const override;
bool Intersects( const BBOX_2D& aBBox ) const override;
bool Intersect( const RAYSEG2D& aSegRay, float* aOutT, SFVEC2F* aNormalOut ) const override;
INTERSECTION_RESULT IsBBoxInside( const BBOX_2D& aBBox ) const override;
bool IsPointInside( const SFVEC2F& aPoint ) const override;
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private:
/**
* The outer part of the polygon.
*
* This list is used to test a ray intersection with the boundaries of this sub polygon.
* It contains also the interpolated normals that are passed from the main polygon.
*/
SEGMENTS_WIDTH_NORMALS m_open_segments;
///< A polygon block can have multiple polygon and holes
OUTERS_AND_HOLES m_outers_and_holes;
};
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/**
* A dummy block defined by a 2d box size.
*
* If the point is inside the bounding box it will return always true. However, the
* intersection with a ray will return always false. This is used as a sub block
* extracted from polygon (pcb polygon areas) and represents an area that is fully filled.
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*/
class DUMMY_BLOCK_2D : public OBJECT_2D
{
public:
DUMMY_BLOCK_2D( const SFVEC2F& aPbMin, const SFVEC2F& aPbMax, const BOARD_ITEM& aBoardItem );
DUMMY_BLOCK_2D( const BBOX_2D& aBBox, const BOARD_ITEM& aBoardItem );
bool Overlaps( const BBOX_2D& aBBox ) const override;
bool Intersects( const BBOX_2D& aBBox ) const override;
bool Intersect( const RAYSEG2D& aSegRay, float* aOutT, SFVEC2F* aNormalOut ) const override;
INTERSECTION_RESULT IsBBoxInside( const BBOX_2D& aBBox ) const override;
bool IsPointInside( const SFVEC2F& aPoint ) const override;
};
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/**
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* Use a polygon in the format of the ClipperLib::Path and process it and create multiple 2d
* objects (POLYGON_2D and DUMMY_BLOCK_2D) that can be used to represent this polygon area.
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*
* @param aMainPath the polygon are that was converted from the pcb board
* @param aDstContainer the destination container to put the created sub blocks
* @param aBiuTo3dUnitsScale the rendering target 3d scale
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* @param aDivFactor a division factor (in 3Dunits) to divide the polygon plane,
* 0.0f will use the internal polygon segm statistics
*/
void CovertPolygonToBlocks( const SHAPE_POLY_SET& aMainPath, CONTAINER_2D_BASE& aDstContainer,
float aBiuTo3dUnitsScale, float aDivFactor,
const BOARD_ITEM& aBoardItem, int aPolyIndex );
void Polygon2d_TestModule();
#endif // _CPOLYGON2D_H_