kicad/include/eda_shape.h

/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2018 Jean-Pierre Charras jp.charras at wanadoo.fr
 * Copyright (C) 1992-2021 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
 */

#ifndef EDA_SHAPE_H
#define EDA_SHAPE_H

#include <eda_units.h>
#include <convert_to_biu.h>
#include <trigo.h>
#include <geometry/shape_poly_set.h>
#include <geometry/geometry_utils.h>
#include <stroke_params.h>

class LINE_READER;
class EDA_DRAW_FRAME;
class FOOTPRINT;
class MSG_PANEL_ITEM;

using KIGFX::COLOR4D;

enum class SHAPE_T : int
{
    SEGMENT = 0,
    RECT,
    ARC,
    CIRCLE,
    POLY,
    BEZIER,
    LAST          ///< marker for list end
};


// WARNING: Do not change these values without updating dialogs that depend on their position values
enum class FILL_T : int
{
    NO_FILL = 1,
    FILLED_SHAPE,               // Fill with object color
    FILLED_WITH_BG_BODYCOLOR,   // Fill with background body color
    FILLED_WITH_COLOR           // Fill with a separate color
};


class EDA_SHAPE
{
public:
    EDA_SHAPE( SHAPE_T aType, int aLineWidth, FILL_T aFill, bool eeWinding );

    // Do not create a copy constructor & operator=.
    // The ones generated by the compiler are adequate.

    ~EDA_SHAPE();

    void SwapShape( EDA_SHAPE* aImage );

    wxString ShowShape() const;

    wxString SHAPE_T_asString() const;

    bool IsFilled() const
    {
        return GetFillMode() != FILL_T::NO_FILL;
    }

    void SetFilled( bool aFlag )
    {
        m_fill = aFlag ? FILL_T::FILLED_SHAPE : FILL_T::NO_FILL;
    }

    void SetFillMode( FILL_T aFill )           { m_fill = aFill; }
    FILL_T GetFillMode() const                 { return m_fill; }

    COLOR4D GetFillColor() const               { return m_fillColor; }
    void SetFillColor( const COLOR4D& aColor ) { m_fillColor = aColor; }

    void SetWidth( int aWidth )                { m_stroke.SetWidth( aWidth ); }
    int GetWidth() const                       { return m_stroke.GetWidth(); }

    void SetShape( SHAPE_T aShape )         { m_shape = aShape; }
    SHAPE_T GetShape() const                { return m_shape; }

    /**
     * Return the starting point of the graphic.
     */
    const wxPoint& GetStart() const         { return m_start; }
    int GetStartY()                         { return m_start.y; }
    int GetStartX()                         { return m_start.x; }

    void SetStart( const wxPoint& aStart )
    {
        m_start = aStart;
        m_endsSwapped = false;
    }

    void SetStartY( int y )
    {
        m_start.y = y;
        m_endsSwapped = false;
    }

    void SetStartX( int x )
    {
        m_start.x = x;
        m_endsSwapped = false;
    }

    /**
     * Return the ending point of the graphic.
     */
    const wxPoint& GetEnd() const           { return m_end; }
    int GetEndY()                           { return m_end.y; }
    int GetEndX()                           { return m_end.x; }

    void SetEnd( const wxPoint& aEnd )
    {
        m_end = aEnd;
        m_endsSwapped = false;
    }

    void SetEndY( int y )
    {
        m_end.y = y;
        m_endsSwapped = false;
    }

    void SetEndX( int x )
    {
        m_end.x = x;
        m_endsSwapped = false;
    }

    void SetBezierC1( const wxPoint& aPt )  { m_bezierC1 = aPt; }
    const wxPoint& GetBezierC1() const      { return m_bezierC1; }

    void SetBezierC2( const wxPoint& aPt )  { m_bezierC2 = aPt; }
    const wxPoint& GetBezierC2() const      { return m_bezierC2; }

    wxPoint getCenter() const;
    void SetCenter( const wxPoint& aCenter );

    /**
     * Set the end point from the angle center and start.
     *
     * @param aAngle is tenths of degrees.
     */
    void SetArcAngleAndEnd( double aAngle, bool aCheckNegativeAngle = false );

    double GetArcAngle() const;

    /**
     * Have the start and end points been swapped since they were set?
     * @return true if they have
    */
    bool EndsSwapped() const { return m_endsSwapped; }

    // Some attributes are read only, since they are derived from m_Start, m_End, and m_Angle.
    // No Set...() function for these attributes.

    wxPoint GetArcMid() const;
    std::vector<wxPoint> GetRectCorners() const;

    /**
     * Calc arc start and end angles such that aStartAngle < aEndAngle.  Each may be between
     * -360.0 and 360.0.
     */
    void CalcArcAngles( double& aStartAngle, double& aEndAngle ) const;

    int GetRadius() const;

    /**
     * Set the three controlling points for an arc.
     *
     * NB: these are NOT what's currently stored, so we have to do some calculations behind
     * the scenes.  However, they are what SHOULD be stored.
     */
    void SetArcGeometry( const wxPoint& aStart, const wxPoint& aMid, const wxPoint& aEnd );

    const std::vector<wxPoint>& GetBezierPoints() const { return m_bezierPoints; }

    /**
     * Duplicate the list of corners in a std::vector<wxPoint>
     *
     * It must be used only to convert the SHAPE_POLY_SET internal corner buffer
     * to a list of wxPoints, and nothing else, because it duplicates the buffer,
     * that is inefficient to know for instance the corner count
     */
    void DupPolyPointsList( std::vector<wxPoint>& aBuffer ) const;

    /**
     * @return the number of corners of the polygonal shape
     */
    int GetPointCount() const;

    // Accessors to the polygonal shape
    SHAPE_POLY_SET& GetPolyShape() { return m_poly; }
    const SHAPE_POLY_SET& GetPolyShape() const { return m_poly; }

    /**
     * @return true if the polygonal shape is valid (has more than 2 points)
     */
    bool IsPolyShapeValid() const;

    void SetPolyShape( const SHAPE_POLY_SET& aShape ) { m_poly = aShape; }

    void SetBezierPoints( const std::vector<wxPoint>& aPoints ) { m_bezierPoints = aPoints; }

    /**
     * Rebuild the m_BezierPoints vertex list that approximate the Bezier curve
     * by a list of segments.
     *
     * Has meaning only for BEZIER shape.
     *
     * @param aMinSegLen is the min length of segments approximating the bezier. The shape's last
     *                   segment can be shorter.  This parameter avoids having too many very short
     *                   segment in list. Good values are between m_width/2 and m_width.
     */
    void RebuildBezierToSegmentsPointsList( int aMinSegLen );

    void SetPolyPoints( const std::vector<wxPoint>& aPoints );

    /**
     * Make a set of SHAPE objects representing the EDA_SHAPE.  Caller owns the objects.
     *
     * @param aEdgeOnly indicates only edges should be generated (even if 0 width), and no fill
     *                  shapes.
     */
    // fixme: move to shape_compound
    std::vector<SHAPE*> MakeEffectiveShapes( bool aEdgeOnly = false ) const;

    void ShapeGetMsgPanelInfo( EDA_DRAW_FRAME* aFrame, std::vector<MSG_PANEL_ITEM>& aList );

    /**
     * Return the length of the track using the hypotenuse calculation.
     *
     * @return the length of the track
     */
    double GetLength() const;

    /**
     * Convert the shape to a closed polygon.
     *
     * Used in filling zones calculations.  Circles and arcs are approximated by segments.
     *
     * @param aCornerBuffer is a buffer to store the polygon.
     * @param aClearanceValue is the clearance around the pad.
     * @param aError is the maximum deviation from a true arc.
     * @param aErrorLoc whether any approximation error shoule be placed inside or outside
     * @param ignoreLineWidth is used for edge cut items where the line width is only
     *        for visualization
     */
    void TransformShapeWithClearanceToPolygon( SHAPE_POLY_SET& aCornerBuffer, int aClearanceValue,
                                               int aError, ERROR_LOC aErrorLoc,
                                               bool ignoreLineWidth ) const;

    int Compare( const EDA_SHAPE* aOther ) const;

protected:
    void setPosition( const wxPoint& aPos );
    wxPoint getPosition() const;

    void move( const wxPoint& aMoveVector );
    void rotate( const wxPoint& aRotCentre, double aAngle );
    void flip( const wxPoint& aCentre, bool aFlipLeftRight );
    void scale( double aScale );

    // To be implemented by concrete classes
    virtual double getParentOrientation() const = 0;
    virtual wxPoint getParentPosition() const = 0;

    const EDA_RECT getBoundingBox() const;

    void computeArcBBox( EDA_RECT& aBBox ) const;

    bool hitTest( const wxPoint& aPosition, int aAccuracy = 0 ) const;
    bool hitTest( const EDA_RECT& aRect, bool aContained, int aAccuracy = 0 ) const;

    const std::vector<wxPoint> buildBezierToSegmentsPointsList( int aMinSegLen  ) const;

    void beginEdit( const wxPoint& aStartPoint );
    bool continueEdit( const wxPoint& aPosition );
    void calcEdit( const wxPoint& aPosition );
    void endEdit();
    void setEditState( int aState ) { m_editState = aState; }

protected:
    bool                 m_endsSwapped;  // true if start/end were swapped e.g. SetArcAngleAndEnd
    SHAPE_T              m_shape;        // Shape: line, Circle, Arc
    STROKE_PARAMS        m_stroke;       // Line style, width, etc.
    FILL_T               m_fill;
    COLOR4D              m_fillColor;

    wxPoint              m_start;        // Line start point or Circle center
    wxPoint              m_end;          // Line end point or Circle 3 o'clock point

    wxPoint              m_arcCenter;    // Used only for Arcs: arc end point

    wxPoint              m_bezierC1;     // Bezier Control Point 1
    wxPoint              m_bezierC2;     // Bezier Control Point 2

    std::vector<wxPoint> m_bezierPoints;
    SHAPE_POLY_SET       m_poly;         // Stores the S_POLYGON shape

    int                  m_editState;
    bool                 m_eeWinding;    // Awful hack
};

#endif  // EDA_SHAPE_H