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Diffstat (limited to 'indra/llmath/llquaternion2.inl')
| -rw-r--r-- | indra/llmath/llquaternion2.inl | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/indra/llmath/llquaternion2.inl b/indra/llmath/llquaternion2.inl new file mode 100644 index 0000000000..9a4274d6a4 --- /dev/null +++ b/indra/llmath/llquaternion2.inl @@ -0,0 +1,108 @@ +/** + * @file llquaternion2.inl + * @brief LLQuaternion2 inline definitions + * + * $LicenseInfo:firstyear=2010&license=viewergpl$ + * + * Copyright (c) 2010, Linden Research, Inc. + * + * Second Life Viewer Source Code + * The source code in this file ("Source Code") is provided by Linden Lab + * to you under the terms of the GNU General Public License, version 2.0 + * ("GPL"), unless you have obtained a separate licensing agreement + * ("Other License"), formally executed by you and Linden Lab. Terms of + * the GPL can be found in doc/GPL-license.txt in this distribution, or + * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2 + * + * There are special exceptions to the terms and conditions of the GPL as + * it is applied to this Source Code. View the full text of the exception + * in the file doc/FLOSS-exception.txt in this software distribution, or + * online at + * http://secondlifegrid.net/programs/open_source/licensing/flossexception + * + * By copying, modifying or distributing this software, you acknowledge + * that you have read and understood your obligations described above, + * and agree to abide by those obligations. + * + * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO + * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, + * COMPLETENESS OR PERFORMANCE. + * $/LicenseInfo$ + */ + +#include "llquaternion2.h" + +static const LLQuad LL_V4A_PLUS_ONE = {1.f, 1.f, 1.f, 1.f}; +static const LLQuad LL_V4A_MINUS_ONE = {-1.f, -1.f, -1.f, -1.f}; + +// Ctor from LLQuaternion +inline LLQuaternion2::LLQuaternion2( const LLQuaternion& quat ) +{ + mQ.set(quat.mQ[VX], quat.mQ[VY], quat.mQ[VZ], quat.mQ[VW]); +} + +////////////////////////// +// Get/Set +////////////////////////// + +// Return the internal LLVector4a representation of the quaternion +inline const LLVector4a& LLQuaternion2::getVector4a() const +{ + return mQ; +} + +inline LLVector4a& LLQuaternion2::getVector4aRw() +{ + return mQ; +} + +///////////////////////// +// Quaternion modification +///////////////////////// + +// Set this quaternion to the conjugate of src +inline void LLQuaternion2::setConjugate(const LLQuaternion2& src) +{ + static LL_ALIGN_16( const U32 F_QUAT_INV_MASK_4A[4] ) = { 0x80000000, 0x80000000, 0x80000000, 0x00000000 }; + mQ = _mm_xor_ps(src.mQ, *reinterpret_cast<const LLQuad*>(&F_QUAT_INV_MASK_4A)); +} + +// Renormalizes the quaternion. Assumes it has nonzero length. +inline void LLQuaternion2::normalize() +{ + mQ.normalize4(); +} + +// Quantize this quaternion to 8 bit precision +inline void LLQuaternion2::quantize8() +{ + mQ.quantize8( LL_V4A_MINUS_ONE, LL_V4A_PLUS_ONE ); + normalize(); +} + +// Quantize this quaternion to 16 bit precision +inline void LLQuaternion2::quantize16() +{ + mQ.quantize16( LL_V4A_MINUS_ONE, LL_V4A_PLUS_ONE ); + normalize(); +} + + +///////////////////////// +// Quaternion inspection +///////////////////////// + +// Return true if this quaternion is equal to 'rhs'. +// Note! Quaternions exhibit "double-cover", so any rotation has two equally valid +// quaternion representations and they will NOT compare equal. +inline bool LLQuaternion2::equals(const LLQuaternion2 &rhs, F32 tolerance/* = F_APPROXIMATELY_ZERO*/) const +{ + return mQ.equals4(rhs.mQ, tolerance); +} + +// Return true if all components are finite and the quaternion is normalized +inline bool LLQuaternion2::isOkRotation() const +{ + return mQ.isFinite4() && mQ.isNormalized4(); +} + |