mirror of
https://github.com/DrBeef/JKXR.git
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66 lines
1.6 KiB
C++
66 lines
1.6 KiB
C++
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/*
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===========================================================================
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Copyright (C) 1999 - 2005, Id Software, Inc.
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Copyright (C) 2000 - 2013, Raven Software, Inc.
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Copyright (C) 2001 - 2013, Activision, Inc.
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Copyright (C) 2013 - 2015, OpenJK contributors
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This file is part of the OpenJK source code.
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OpenJK is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License version 2 as
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published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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===========================================================================
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*/
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#include <math.h>
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#if _MSC_VER
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# include <float.h>
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# pragma fenv_access (on)
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#else
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# include <fenv.h>
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#endif
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#if _MSC_VER
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static inline float roundfloat(float n)
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{
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return (n < 0.0f) ? ceilf(n - 0.5f) : floorf(n + 0.5f);
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}
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#endif
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extern "C"
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void Sys_SnapVector(float *v)
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{
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#if _MSC_VER
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unsigned int oldcontrol;
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unsigned int newcontrol;
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_controlfp_s(&oldcontrol, 0, 0);
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_controlfp_s(&newcontrol, _RC_NEAR, _MCW_RC);
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v[0] = roundfloat(v[0]);
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v[1] = roundfloat(v[1]);
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v[2] = roundfloat(v[2]);
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_controlfp_s(&newcontrol, oldcontrol, _MCW_RC);
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#else
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// pure C99
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int oldround = fegetround();
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fesetround(FE_TONEAREST);
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v[0] = nearbyintf(v[0]);
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v[1] = nearbyintf(v[1]);
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v[2] = nearbyintf(v[2]);
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fesetround(oldround);
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#endif
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}
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