xform.cpp
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上传日期:2021-03-01
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- /**
- * @file xform.cpp
- *
- * $LicenseInfo:firstyear=2001&license=viewergpl$
- *
- * Copyright (c) 2001-2010, 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 "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;
- }