kicad-source/pcbnew/pad_utils.cpp

/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2025 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
 */

#include "pad_utils.h"


double PAD_UTILS::GetDefaultIpcRoundingRatio( const PAD& aPad, PCB_LAYER_ID aLayer )
{
    const double defaultProportion = 0.25;
    const double minimumSizeIU = pcbIUScale.mmToIU( 0.25 );

    const VECTOR2I& size = aPad.GetSize( aLayer );
    const int       padMinSizeIU = std::min( size.x, size.y );
    const double    defaultRadiusIU = std::min( minimumSizeIU, padMinSizeIU * defaultProportion );

    // Convert back to a ratio
    return defaultRadiusIU / padMinSizeIU;
}

/**
 * @brief Returns true if the pad's rounding ratio is valid (i.e. the pad
 * has a shape where that is meaningful)
 */
bool PAD_UTILS::PadHasMeaningfulRoundingRadius( const PAD& aPad, PCB_LAYER_ID aLayer )
{
    const PAD_SHAPE shape = aPad.GetShape( aLayer );
    return shape == PAD_SHAPE::ROUNDRECT || shape == PAD_SHAPE::CHAMFERED_RECT;
}