alexpete
65 lines
2.1 KiB
C++
65 lines
2.1 KiB
C++
/*
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* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
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* its licensors.
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*
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* For complete copyright and license terms please see the LICENSE at the root of this
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* distribution (the "License"). All use of this software is governed by the License,
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* or, if provided, by the license below or the license accompanying this file. Do not
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* remove or modify any license notices. This file 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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*
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*/
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// constructor
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template <class StorageType>
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MCORE_INLINE TCompressedFloat<StorageType>::TCompressedFloat()
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{
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}
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// constructor
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template <class StorageType>
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MCORE_INLINE TCompressedFloat<StorageType>::TCompressedFloat(float value, float minValue, float maxValue)
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{
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// TODO: make sure due to rounding/floating point errors the result is not negative?
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const StorageType f = (1.0f / (maxValue - minValue)) * CONVERT_VALUE;
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mValue = (value - minValue) * f;
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}
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// constructor
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template <class StorageType>
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MCORE_INLINE TCompressedFloat<StorageType>::TCompressedFloat(StorageType value)
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{
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mValue = value;
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}
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// create from a floating point value
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template <class StorageType>
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MCORE_INLINE void TCompressedFloat<StorageType>::FromFloat(float value, float minValue, float maxValue)
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{
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// TODO: make sure due to rounding/floating point errors the result is not negative?
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const StorageType f = (StorageType)(1.0f / (maxValue - minValue)) * CONVERT_VALUE;
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mValue = (StorageType)((value - minValue) * f);
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}
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// uncompress into a floating point value
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template <class StorageType>
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MCORE_INLINE void TCompressedFloat<StorageType>::UnCompress(float* output, float minValue, float maxValue) const
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{
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// unpack and normalize
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const float f = (1.0f / (float)CONVERT_VALUE) * (maxValue - minValue);
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*output = ((float)mValue * f) + minValue;
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}
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// convert to a floating point value
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template <class StorageType>
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MCORE_INLINE float TCompressedFloat<StorageType>::ToFloat(float minValue, float maxValue) const
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{
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const float f = (1.0f / (float)CONVERT_VALUE) * (maxValue - minValue);
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return ((mValue * f) + minValue);
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}
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