51 lines
1.4 KiB
C++
51 lines
1.4 KiB
C++
// Copyright 2013 Dolphin Emulator Project / 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <algorithm>
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#include <cstdlib>
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#include <type_traits>
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namespace MathUtil {
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static constexpr float PI = 3.14159265f;
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inline bool IntervalsIntersect(unsigned start0, unsigned length0, unsigned start1,
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unsigned length1) {
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return (std::max(start0, start1) < std::min(start0 + length0, start1 + length1));
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}
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template <class T>
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struct Rectangle {
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T left{};
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T top{};
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T right{};
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T bottom{};
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Rectangle() = default;
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Rectangle(T left, T top, T right, T bottom)
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: left(left), top(top), right(right), bottom(bottom) {}
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T GetWidth() const {
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return std::abs(static_cast<typename std::make_signed<T>::type>(right - left));
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}
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T GetHeight() const {
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return std::abs(static_cast<typename std::make_signed<T>::type>(bottom - top));
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}
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Rectangle<T> TranslateX(const T x) const {
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return Rectangle{left + x, top, right + x, bottom};
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}
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Rectangle<T> TranslateY(const T y) const {
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return Rectangle{left, top + y, right, bottom + y};
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}
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Rectangle<T> Scale(const float s) const {
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return Rectangle{left, top, static_cast<T>(left + GetWidth() * s),
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static_cast<T>(top + GetHeight() * s)};
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}
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};
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} // namespace MathUtil
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