create.h

/*****************************************************************************
 * VCLib                                                                     *
 * Visual Computing Library                                                  *
 *                                                                           *
 * Copyright(C) 2021-2025                                                    *
 * Visual Computing Lab                                                      *
 * ISTI - Italian National Research Council                                  *
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 * it under the terms of the Mozilla Public License Version 2.0 as published *
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 * This program is distributed in the hope that it will be useful,           *
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the              *
 * Mozilla Public License Version 2.0                                        *
 * (https://www.mozilla.org/en-US/MPL/2.0/) for more details.                *
 ****************************************************************************/
 
#ifndef VCL_ALGORITHMS_CORE_POLYGON_CREATE_H
#define VCL_ALGORITHMS_CORE_POLYGON_CREATE_H
 
#include <vclib/space/core/polygon.h>
 
namespace vcl {
 
template<Polygon2Concept PolygonType>
PolygonType createCircle(uint n, typename PolygonType::ScalarType radius = 1.0)
{
    using ScalarType = typename PolygonType::ScalarType;
    using PointType  = typename PolygonType::PointType;
 
    PolygonType poly;
    poly.reserve(n);
 
    const ScalarType angleStep = 2 * M_PI / n;
    for (uint i = 0; i < n; ++i) {
        const ScalarType angle = i * angleStep;
        const PointType  p =
            PointType(std::cos(angle), std::sin(angle)) * radius;
        poly.pushBack(p);
    }
 
    return poly;
}
PolygonType createCircle(uint n, typename PolygonType::ScalarType radius = 1.0) {…}
 
} // namespace vcl
 
#endif // VCL_ALGORITHMS_CORE_POLYGON_CREATE_H