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/**
* @file xform.cpp
*
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
* Second Life Viewer Source Code
* 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.
*
* 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.
*
* 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
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#include "linden_common.h"
#include "xform.h"
LLXform::LLXform()
{
init();
}
LLXform::~LLXform()
{
}
// Link optimization - don't inline these llwarns
void LLXform::warn(const char* const msg)
{
llwarns << msg << llendl;
}
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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