diff options
Diffstat (limited to 'indra/llmath/m4math.h')
| -rw-r--r-- | indra/llmath/m4math.h | 66 |
1 files changed, 42 insertions, 24 deletions
diff --git a/indra/llmath/m4math.h b/indra/llmath/m4math.h index 58c9c09d7f..6ec9958491 100644 --- a/indra/llmath/m4math.h +++ b/indra/llmath/m4math.h @@ -2,31 +2,25 @@ * @file m4math.h * @brief LLMatrix4 class header file. * - * $LicenseInfo:firstyear=2000&license=viewergpl$ - * - * Copyright (c) 2000-2009, Linden Research, Inc. - * + * $LicenseInfo:firstyear=2000&license=viewerlgpl$ * 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 + * Copyright (C) 2010, Linden Research, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; + * version 2.1 of the License only. * - * 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 + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. * - * 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. + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * - * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO - * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, - * COMPLETENESS OR PERFORMANCE. + * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA * $/LicenseInfo$ */ @@ -230,7 +224,7 @@ public: // friend inline LLMatrix4 operator*(const LLMatrix4 &a, const LLMatrix4 &b); // Return a * b friend LLVector4 operator*(const LLVector4 &a, const LLMatrix4 &b); // Return transform of vector a by matrix b - friend LLVector3 operator*(const LLVector3 &a, const LLMatrix4 &b); // Return full transform of a by matrix b + friend const LLVector3 operator*(const LLVector3 &a, const LLMatrix4 &b); // Return full transform of a by matrix b friend LLVector4 rotate_vector(const LLVector4 &a, const LLMatrix4 &b); // Rotates a but does not translate friend LLVector3 rotate_vector(const LLVector3 &a, const LLMatrix4 &b); // Rotates a but does not translate @@ -353,7 +347,31 @@ inline const LLMatrix4& operator-=(LLMatrix4 &a, const LLMatrix4 &b) return a; } -#endif - +// Operates "to the left" on row-vector a +// +// When avatar vertex programs are off, this function is a hot spot in profiles +// due to software skinning in LLViewerJointMesh::updateGeometry(). JC +inline const LLVector3 operator*(const LLVector3 &a, const LLMatrix4 &b) +{ + // This is better than making a temporary LLVector3. This eliminates an + // unnecessary LLVector3() constructor and also helps the compiler to + // realize that the output floats do not alias the input floats, hence + // eliminating redundant loads of a.mV[0], etc. JC + return LLVector3(a.mV[VX] * b.mMatrix[VX][VX] + + a.mV[VY] * b.mMatrix[VY][VX] + + a.mV[VZ] * b.mMatrix[VZ][VX] + + b.mMatrix[VW][VX], + + a.mV[VX] * b.mMatrix[VX][VY] + + a.mV[VY] * b.mMatrix[VY][VY] + + a.mV[VZ] * b.mMatrix[VZ][VY] + + b.mMatrix[VW][VY], + + a.mV[VX] * b.mMatrix[VX][VZ] + + a.mV[VY] * b.mMatrix[VY][VZ] + + a.mV[VZ] * b.mMatrix[VZ][VZ] + + b.mMatrix[VW][VZ]); +} +#endif |