kicad/3d-viewer/3d_rendering/3d_render_raytracing/shapes2D/cpolygon2d.h

168 lines
5.4 KiB
C++

/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2015-2016 Mario Luzeiro <mrluzeiro@ua.pt>
* 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 cpolygon2d.h
* @brief
*/
#ifndef _CPOLYGON2D_H_
#define _CPOLYGON2D_H_
#include "cobject2d.h"
#include "../accelerators/ccontainer2d.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;
} POLYSEGMENT;
typedef struct
{
SFVEC2F m_Start;
SFVEC2F m_End;
} SEG_NORMALS;
typedef struct
{
SFVEC2F m_Start;
SFVEC2F m_Precalc_slope;
SEG_NORMALS m_Normals;
} SEGMENT_WITH_NORMALS;
typedef std::vector< POLYSEGMENT > SEGMENTS;
/**
* 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;
/**
* 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;
} OUTERS_AND_HOLES;
/**
* 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 CPOLYGONBLOCK2D : public COBJECT2D
{
public:
CPOLYGONBLOCK2D( const SEGMENTS_WIDTH_NORMALS &aOpenSegmentList,
const OUTERS_AND_HOLES &aOuter_and_holes,
const BOARD_ITEM &aBoardItem );
// Imported from COBJECT2D
bool Overlaps( const CBBOX2D &aBBox ) const override;
bool Intersects( const CBBOX2D &aBBox ) const override;
bool Intersect( const RAYSEG2D &aSegRay, float *aOutT, SFVEC2F *aNormalOut ) const override;
INTERSECTION_RESULT IsBBoxInside( const CBBOX2D &aBBox ) const override;
bool IsPointInside( const SFVEC2F &aPoint ) const override;
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;
};
/**
* 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 full filled.
*/
class CDUMMYBLOCK2D : public COBJECT2D
{
public:
CDUMMYBLOCK2D( const SFVEC2F &aPbMin,
const SFVEC2F &aPbMax,
const BOARD_ITEM &aBoardItem );
CDUMMYBLOCK2D( const CBBOX2D &aBBox, const BOARD_ITEM &aBoardItem );
// Imported from COBJECT2D
bool Overlaps( const CBBOX2D &aBBox ) const override;
bool Intersects( const CBBOX2D &aBBox ) const override;
bool Intersect( const RAYSEG2D &aSegRay, float *aOutT, SFVEC2F *aNormalOut ) const override;
INTERSECTION_RESULT IsBBoxInside( const CBBOX2D &aBBox ) const override;
bool IsPointInside( const SFVEC2F &aPoint ) const override;
};
/**
* Use a polygon in the format of the ClipperLib::Path and process it and create multiple 2d
* objects (CPOLYGONBLOCK2D and CDUMMYBLOCK2D) that can be used to represent this polygon area.
*
* @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
* @param aDivFactor a division factor (in 3Dunits) to divide the polygon plane,
* 0.0f will use the internal polygon segm statistics
*/
void Convert_path_polygon_to_polygon_blocks_and_dummy_blocks(
const SHAPE_POLY_SET &aMainPath,
CGENERICCONTAINER2D &aDstContainer,
float aBiuTo3DunitsScale,
float aDivFactor,
const BOARD_ITEM &aBoardItem,
int aPolyIndex );
void Polygon2d_TestModule();
#endif // _CPOLYGON2D_H_