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/**
* @file xform.cpp
*
* $LicenseInfo:firstyear=2001&license=viewergpl$
*
* Copyright (c) 2001-2009, 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 "linden_common.h"
#include "xform.h"
LLXform::LLXform()
{
init();
}
LLXform::~LLXform()
{
}
LLXform* LLXform::getRoot() const
{
const LLXform* root = this;
while(root->mParent)
{
root = root->mParent;
}
return (LLXform*)root;
}
BOOL LLXform::isRoot() const
{
return (!mParent);
}
BOOL LLXform::isRootEdit() const
{
return (!mParent);
}
LLXformMatrix::~LLXformMatrix()
{
}
void LLXformMatrix::update()
{
if (mParent)
{
mWorldPosition = mPosition;
if (mParent->getScaleChildOffset())
{
mWorldPosition.scaleVec(mParent->getScale());
}
mWorldPosition *= mParent->getWorldRotation();
mWorldPosition += mParent->getWorldPosition();
mWorldRotation = mRotation * mParent->getWorldRotation();
}
else
{
mWorldPosition = mPosition;
mWorldRotation = mRotation;
}
}
void LLXformMatrix::updateMatrix(BOOL update_bounds)
{
update();
mWorldMatrix.initAll(mScale, mWorldRotation, mWorldPosition);
if (update_bounds && (mChanged & MOVED))
{
mMin.mV[0] = mMax.mV[0] = mWorldMatrix.mMatrix[3][0];
mMin.mV[1] = mMax.mV[1] = mWorldMatrix.mMatrix[3][1];
mMin.mV[2] = mMax.mV[2] = mWorldMatrix.mMatrix[3][2];
F32 f0 = (fabs(mWorldMatrix.mMatrix[0][0])+fabs(mWorldMatrix.mMatrix[1][0])+fabs(mWorldMatrix.mMatrix[2][0])) * 0.5f;
F32 f1 = (fabs(mWorldMatrix.mMatrix[0][1])+fabs(mWorldMatrix.mMatrix[1][1])+fabs(mWorldMatrix.mMatrix[2][1])) * 0.5f;
F32 f2 = (fabs(mWorldMatrix.mMatrix[0][2])+fabs(mWorldMatrix.mMatrix[1][2])+fabs(mWorldMatrix.mMatrix[2][2])) * 0.5f;
mMin.mV[0] -= f0;
mMin.mV[1] -= f1;
mMin.mV[2] -= f2;
mMax.mV[0] += f0;
mMax.mV[1] += f1;
mMax.mV[2] += f2;
}
}
void LLXformMatrix::getMinMax(LLVector3& min, LLVector3& max) const
{
min = mMin;
max = mMax;
}
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