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45 lines
1.1 KiB
45 lines
1.1 KiB
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <algorithm>
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#include <cmath>
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namespace android {
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template<typename T>
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static constexpr T saturate(T v) noexcept {
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return T(std::min(T(1), std::max(T(0), v)));
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}
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template<typename T>
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static constexpr T clamp(T v, T min, T max) noexcept {
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return T(std::min(max, std::max(min, v)));
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}
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template<typename T>
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static constexpr T mix(T x, T y, T a) noexcept {
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return x * (T(1) - a) + y * a;
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}
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template<typename T>
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static constexpr T lerp(T x, T y, T a) noexcept {
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return mix(x, y, a);
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}
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} // namespace std
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