ViewDesignEngine
33 lines
916 B
C++
33 lines
916 B
C++
#pragma once
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#include "vde/core/point.h"
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#include <vector>
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namespace vde::core {
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class Polygon2D {
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public:
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Polygon2D() = default;
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explicit Polygon2D(std::vector<Point2D> vertices) : vertices_(std::move(vertices)) {}
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[[nodiscard]] const std::vector<Point2D>& vertices() const { return vertices_; }
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[[nodiscard]] size_t size() const { return vertices_.size(); }
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[[nodiscard]] bool empty() const { return vertices_.empty(); }
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/// Signed area (positive = CCW)
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[[nodiscard]] double signed_area() const;
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/// Absolute area
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[[nodiscard]] double area() const { return std::abs(signed_area()); }
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/// Point-in-polygon test (ray casting)
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[[nodiscard]] bool contains(const Point2D& p) const;
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/// Is the polygon counter-clockwise?
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[[nodiscard]] bool is_ccw() const { return signed_area() > 0; }
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private:
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std::vector<Point2D> vertices_;
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};
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} // namespace vde::core
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