mirror of https://github.com/axmolengine/axmol.git
48 lines
1.2 KiB
C++
48 lines
1.2 KiB
C++
/**
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Copyright 2013 BlackBerry Inc.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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Original file from GamePlay3D: http://gameplay3d.org
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This file was modified to fit the cocos2d-x project
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*/
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#include "MathUtil.h"
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#include "base/ccMacros.h"
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NS_CC_MATH_BEGIN
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void MathUtil::smooth(float* x, float target, float elapsedTime, float responseTime)
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{
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GP_ASSERT(x);
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if (elapsedTime > 0)
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{
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*x += (target - *x) * elapsedTime / (elapsedTime + responseTime);
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}
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}
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void MathUtil::smooth(float* x, float target, float elapsedTime, float riseTime, float fallTime)
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{
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GP_ASSERT(x);
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if (elapsedTime > 0)
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{
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float delta = target - *x;
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*x += delta * elapsedTime / (elapsedTime + (delta > 0 ? riseTime : fallTime));
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}
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}
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NS_CC_MATH_END
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