diff options
Diffstat (limited to 'Userland/Libraries/LibGfx/Triangle.h')
| -rw-r--r-- | Userland/Libraries/LibGfx/Triangle.h | 44 |
1 files changed, 23 insertions, 21 deletions
diff --git a/Userland/Libraries/LibGfx/Triangle.h b/Userland/Libraries/LibGfx/Triangle.h index 605f70fd70..d9f0de5870 100644 --- a/Userland/Libraries/LibGfx/Triangle.h +++ b/Userland/Libraries/LibGfx/Triangle.h @@ -1,5 +1,6 @@ /* * Copyright (c) 2020, Shannon Booth <shannon.ml.booth@gmail.com> + * Copyright (c) 2022, Andreas Kling <kling@serenityos.org> * * SPDX-License-Identifier: BSD-2-Clause */ @@ -11,38 +12,39 @@ namespace Gfx { +template<typename T> class Triangle { public: - Triangle(IntPoint a, IntPoint b, IntPoint c) + Triangle(Point<T> a, Point<T> b, Point<T> c) : m_a(a) , m_b(b) , m_c(c) { - 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()); + m_determinant = (m_b.x() - m_a.x()) * (m_c.y() - m_a.y()) - (m_b.y() - m_a.y()) * (m_c.x() - m_a.x()); } - IntPoint a() const { return m_a; } - IntPoint b() const { return m_b; } - IntPoint c() const { return m_c; } + Point<T> a() const { return m_a; } + Point<T> b() const { return m_b; } + Point<T> c() const { return m_c; } - bool contains(IntPoint p) const + bool contains(Point<T> p) const { - int x = p.x(); - int y = p.y(); + auto x = p.x(); + auto y = p.y(); - int ax = m_a.x(); - int bx = m_b.x(); - int cx = m_c.x(); + auto ax = m_a.x(); + auto bx = m_b.x(); + auto cx = m_c.x(); - int ay = m_a.y(); - int by = m_b.y(); - int cy = m_c.y(); + auto ay = m_a.y(); + auto by = m_b.y(); + auto cy = m_c.y(); - if (m_det * ((bx - ax) * (y - ay) - (by - ay) * (x - ax)) <= 0) + if (m_determinant * ((bx - ax) * (y - ay) - (by - ay) * (x - ax)) <= 0) return false; - if (m_det * ((cx - bx) * (y - by) - (cy - by) * (x - bx)) <= 0) + if (m_determinant * ((cx - bx) * (y - by) - (cy - by) * (x - bx)) <= 0) return false; - if (m_det * ((ax - cx) * (y - cy) - (ay - cy) * (x - cx)) <= 0) + if (m_determinant * ((ax - cx) * (y - cy) - (ay - cy) * (x - cx)) <= 0) return false; return true; } @@ -50,10 +52,10 @@ public: String to_string() const; private: - int m_det; - IntPoint m_a; - IntPoint m_b; - IntPoint m_c; + T m_determinant { 0 }; + Point<T> m_a; + Point<T> m_b; + Point<T> m_c; }; } |