35 lines
972 B
C
35 lines
972 B
C
///////////////////////////////////////////////////////////////////////
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// Name: IdvFastMath.h
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//
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// *** INTERACTIVE DATA VISUALIZATION (IDV) PROPRIETARY INFORMATION ***
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//
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// Copyright (c) 2001-2004 IDV, Inc.
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// All Rights Reserved.
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//
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// IDV, Inc.
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// 1233 Washington St. Suite 610
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// Columbia, SC 29201
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// Voice: (803) 799-1699
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// Fax: (803) 931-0320
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// Web: http://www.idvinc.com
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//
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// This software is supplied under the terms of a license agreement or
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// nondisclosure agreement with Interactive Data Visualization and may not
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// be copied or disclosed except in accordance with the terms of that
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// agreement.
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#pragma once
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#include <cmath>
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///////////////////////////////////////////////////////////////////////
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// _idv_sqrt1 definition
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inline float _idv_sqrt1(float fVal)
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{
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int i = ((*reinterpret_cast<int*>(&fVal)) >> 1 ) + 0x1fc00000;
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return *reinterpret_cast<float*>(&i);
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}
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