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/indra/llmath/llmatrix3a.inl

https://bitbucket.org/lindenlab/viewer-beta/
C++ Header | 119 lines | 77 code | 17 blank | 25 comment | 5 complexity | 8423d02c715f872316696d299e9ff13c MD5 | raw file
  1/** 
  2 * @file llmatrix3a.inl
  3 * @brief LLMatrix3a inline definitions
  4 *
  5 * $LicenseInfo:firstyear=2010&license=viewerlgpl$
  6 * Second Life Viewer Source Code
  7 * Copyright (C) 2010, Linden Research, Inc.
  8 * 
  9 * This library is free software; you can redistribute it and/or
 10 * modify it under the terms of the GNU Lesser General Public
 11 * License as published by the Free Software Foundation;
 12 * version 2.1 of the License only.
 13 * 
 14 * This library is distributed in the hope that it will be useful,
 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 17 * Lesser General Public License for more details.
 18 * 
 19 * You should have received a copy of the GNU Lesser General Public
 20 * License along with this library; if not, write to the Free Software
 21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 22 * 
 23 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 24 * $/LicenseInfo$
 25 */
 26
 27#include "llmatrix3a.h"
 28#include "m3math.h"
 29
 30inline LLMatrix3a::LLMatrix3a( const LLVector4a& c0, const LLVector4a& c1, const LLVector4a& c2 )
 31{
 32	setColumns( c0, c1, c2 );
 33}
 34
 35inline void LLMatrix3a::loadu(const LLMatrix3& src)
 36{
 37	mColumns[0].load3(src.mMatrix[0]);
 38	mColumns[1].load3(src.mMatrix[1]);
 39	mColumns[2].load3(src.mMatrix[2]);
 40}
 41
 42inline void LLMatrix3a::setRows(const LLVector4a& r0, const LLVector4a& r1, const LLVector4a& r2)
 43{
 44	mColumns[0] = r0;
 45	mColumns[1] = r1;
 46	mColumns[2] = r2;
 47	setTranspose( *this );
 48}
 49
 50inline void LLMatrix3a::setColumns(const LLVector4a& c0, const LLVector4a& c1, const LLVector4a& c2)
 51{
 52	mColumns[0] = c0;
 53	mColumns[1] = c1;
 54	mColumns[2] = c2;
 55}
 56
 57inline void LLMatrix3a::setTranspose(const LLMatrix3a& src)
 58{
 59	const LLQuad srcCol0 = src.mColumns[0];
 60	const LLQuad srcCol1 = src.mColumns[1];
 61	const LLQuad unpacklo = _mm_unpacklo_ps( srcCol0, srcCol1 );
 62	mColumns[0] = _mm_movelh_ps( unpacklo, src.mColumns[2] );
 63	mColumns[1] = _mm_shuffle_ps( _mm_movehl_ps( srcCol0, unpacklo ), src.mColumns[2], _MM_SHUFFLE(0, 1, 1, 0) );
 64	mColumns[2] = _mm_shuffle_ps( _mm_unpackhi_ps( srcCol0, srcCol1 ), src.mColumns[2], _MM_SHUFFLE(0, 2, 1, 0) );
 65}
 66
 67inline const LLVector4a& LLMatrix3a::getColumn(const U32 column) const
 68{
 69	llassert( column < 3 );
 70	return mColumns[column];
 71}
 72
 73inline void LLMatrix3a::setLerp(const LLMatrix3a& a, const LLMatrix3a& b, F32 w)
 74{
 75	mColumns[0].setLerp( a.mColumns[0], b.mColumns[0], w );
 76	mColumns[1].setLerp( a.mColumns[1], b.mColumns[1], w );
 77	mColumns[2].setLerp( a.mColumns[2], b.mColumns[2], w );
 78}
 79
 80inline LLBool32 LLMatrix3a::isFinite() const
 81{
 82	return mColumns[0].isFinite3() && mColumns[1].isFinite3() && mColumns[2].isFinite3();
 83}
 84
 85inline void LLMatrix3a::getDeterminant( LLVector4a& dest ) const
 86{
 87	LLVector4a col1xcol2; col1xcol2.setCross3( mColumns[1], mColumns[2] );
 88	dest.setAllDot3( col1xcol2, mColumns[0] );
 89}
 90
 91inline LLSimdScalar LLMatrix3a::getDeterminant() const
 92{
 93	LLVector4a col1xcol2; col1xcol2.setCross3( mColumns[1], mColumns[2] );
 94	return col1xcol2.dot3( mColumns[0] );
 95}
 96
 97inline bool LLMatrix3a::isApproximatelyEqual( const LLMatrix3a& rhs, F32 tolerance /*= F_APPROXIMATELY_ZERO*/ ) const
 98{
 99	return rhs.getColumn(0).equals3(mColumns[0], tolerance) 
100		&& rhs.getColumn(1).equals3(mColumns[1], tolerance) 
101		&& rhs.getColumn(2).equals3(mColumns[2], tolerance); 
102}
103
104inline const LLMatrix3a& LLMatrix3a::getIdentity()
105{
106	extern const LLMatrix3a LL_M3A_IDENTITY;
107	return LL_M3A_IDENTITY;
108}
109
110inline bool LLRotation::isOkRotation() const
111{
112	LLMatrix3a transpose; transpose.setTranspose( *this );
113	LLMatrix3a product; product.setMul( *this, transpose );
114
115	LLSimdScalar detMinusOne = getDeterminant() - 1.f;
116
117	return product.isApproximatelyEqual( LLMatrix3a::getIdentity() ) && (detMinusOne.getAbs() < F_APPROXIMATELY_ZERO);
118}
119