arc_tangent_seed.h

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright The 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, see <https://www.gnu.org/licenses/>.
 */
 
#pragma once
 
#include <optional>
 
#include <geometry/seg.h>
#include <math/vector2d.h>
 
class EDA_SHAPE;

constexpr int ARC_SEED_PICK_PIXELS = 5;

struct ARC_TANGENT_SEED
{
    VECTOR2I m_start;
    VECTOR2D m_direction;
    bool     m_directionIsAxis = false;   
};
 

std::optional<ARC_TANGENT_SEED> ArcTangentSeedNear( const EDA_SHAPE& aShape, const VECTOR2I& aNear );
 

std::optional<ARC_TANGENT_SEED> ArcTangentSeedAt( const EDA_SHAPE& aShape, const VECTOR2I& aPoint, int aTolerance );

std::optional<ARC_TANGENT_SEED> ArcTangentSeedAt( const SEG& aSegment, const VECTOR2I& aPoint, int aTolerance );