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SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
59 lines
1.2 KiB
C++
59 lines
1.2 KiB
C++
/*
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* Copyright (c) 2020, Shannon Booth <shannon.ml.booth@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Forward.h>
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#include <LibGfx/Point.h>
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namespace Gfx {
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class Triangle {
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public:
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Triangle(IntPoint a, IntPoint b, IntPoint c)
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: m_a(a)
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, m_b(b)
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, m_c(c)
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{
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m_det = (m_b.x() - m_a.x()) * (m_c.y() - m_a.y()) - (m_b.y() - m_a.y()) * (m_c.x() - m_a.x());
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}
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IntPoint a() const { return m_a; }
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IntPoint b() const { return m_b; }
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IntPoint c() const { return m_c; }
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bool contains(IntPoint p) const
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{
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int x = p.x();
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int y = p.y();
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int ax = m_a.x();
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int bx = m_b.x();
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int cx = m_c.x();
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int ay = m_a.y();
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int by = m_b.y();
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int cy = m_c.y();
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if (m_det * ((bx - ax) * (y - ay) - (by - ay) * (x - ax)) <= 0)
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return false;
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if (m_det * ((cx - bx) * (y - by) - (cy - by) * (x - bx)) <= 0)
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return false;
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if (m_det * ((ax - cx) * (y - cy) - (ay - cy) * (x - cx)) <= 0)
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return false;
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return true;
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}
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String to_string() const;
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private:
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int m_det;
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IntPoint m_a;
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IntPoint m_b;
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IntPoint m_c;
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};
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}
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