[657] | 1 | /*
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| 2 | -----------------------------------------------------------------------------
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| 3 | This source file is part of OGRE
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| 4 | (Object-oriented Graphics Rendering Engine)
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| 5 | For the latest info, see http://www.ogre3d.org/
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| 6 |
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| 7 | Copyright (c) 2000-2005 The OGRE Team
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| 8 | Also see acknowledgements in Readme.html
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| 9 |
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| 10 | This program is free software; you can redistribute it and/or modify it under
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| 11 | the terms of the GNU Lesser General Public License as published by the Free Software
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| 12 | Foundation; either version 2 of the License, or (at your option) any later
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| 13 | version.
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| 14 |
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| 15 | This program is distributed in the hope that it will be useful, but WITHOUT
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| 16 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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| 17 | FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
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| 18 |
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| 19 | You should have received a copy of the GNU Lesser General Public License along with
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| 20 | this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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| 21 | Place - Suite 330, Boston, MA 02111-1307, USA, or go to
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| 22 | http://www.gnu.org/copyleft/lesser.txt.
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| 23 | -----------------------------------------------------------------------------
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| 24 | */
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| 25 | #include "OgreStableHeaders.h"
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| 26 | #include "OgreAnimationTrack.h"
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| 27 | #include "OgreAnimation.h"
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| 28 | #include "OgreKeyFrame.h"
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| 29 | #include "OgreNode.h"
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| 30 | #include "OgreLogManager.h"
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| 31 |
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| 32 | // Debug
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| 33 | #include "OgreRenderWindow.h"
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| 34 | #include "OgreRoot.h"
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| 35 | Ogre::RenderWindow* mMainWindow = 0;
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| 36 | // End Debug
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| 37 |
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| 38 | namespace Ogre {
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| 39 |
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| 40 | //---------------------------------------------------------------------
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| 41 | AnimationTrack::AnimationTrack(Animation* parent) : mParent(parent)
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| 42 | {
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| 43 | mTargetNode = 0;
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| 44 | mMaxKeyFrameTime = -1;
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| 45 | mSplineBuildNeeded = false;
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| 46 | mUseShortestRotationPath = true ;
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| 47 | }
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| 48 | //---------------------------------------------------------------------
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| 49 | AnimationTrack::AnimationTrack(Animation* parent, Node* targetNode)
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| 50 | : mParent(parent), mTargetNode(targetNode)
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| 51 | {
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| 52 | mMaxKeyFrameTime = -1;
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| 53 | mSplineBuildNeeded = false;
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| 54 | mUseShortestRotationPath = true ;
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| 55 | }
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| 56 | //---------------------------------------------------------------------
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| 57 | AnimationTrack::~AnimationTrack()
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| 58 | {
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| 59 | removeAllKeyFrames();
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| 60 | }
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| 61 | //---------------------------------------------------------------------
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| 62 | unsigned short AnimationTrack::getNumKeyFrames(void) const
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| 63 | {
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| 64 | return (unsigned short)mKeyFrames.size();
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| 65 | }
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| 66 | //---------------------------------------------------------------------
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| 67 | KeyFrame* AnimationTrack::getKeyFrame(unsigned short index) const
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| 68 | {
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| 69 | // If you hit this assert, then the keyframe index is out of bounds
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| 70 | assert( index < (ushort)mKeyFrames.size() );
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| 71 |
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| 72 | return mKeyFrames[index];
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| 73 | }
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| 74 | //---------------------------------------------------------------------
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| 75 | Real AnimationTrack::getKeyFramesAtTime(Real timePos, KeyFrame** keyFrame1, KeyFrame** keyFrame2,
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| 76 | unsigned short* firstKeyIndex) const
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| 77 | {
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| 78 | short firstIndex = -1;
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| 79 | Real totalAnimationLength = mParent->getLength();
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| 80 |
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| 81 | // Wrap time
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| 82 | while (timePos > totalAnimationLength)
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| 83 | {
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| 84 | timePos -= totalAnimationLength;
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| 85 | }
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| 86 |
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| 87 | KeyFrameList::const_iterator i = mKeyFrames.begin();
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| 88 | // Find last keyframe before or on current time
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| 89 | while (i != mKeyFrames.end() && (*i)->getTime() <= timePos)
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| 90 | {
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| 91 | *keyFrame1 = *i++;
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| 92 | ++firstIndex;
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| 93 | }
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| 94 |
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| 95 | // Trap case where there is no key before this time (problem with animation config)
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| 96 | // In this case use the first key anyway and pretend it's time index 0
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| 97 | if (firstIndex == -1)
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| 98 | {
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| 99 | *keyFrame1 = *i;
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| 100 | ++firstIndex;
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| 101 | }
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| 102 |
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| 103 | // Fill index of the first key
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| 104 | if (firstKeyIndex != NULL)
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| 105 | {
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| 106 | *firstKeyIndex = firstIndex;
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| 107 | }
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| 108 |
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| 109 | // Parametric time
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| 110 | // t1 = time of previous keyframe
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| 111 | // t2 = time of next keyframe
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| 112 | Real t1, t2;
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| 113 | // Find first keyframe after the time
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| 114 | // If no next keyframe, wrap back to first
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| 115 | if (i == mKeyFrames.end())
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| 116 | {
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| 117 | *keyFrame2 = mKeyFrames[0];
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| 118 | t2 = totalAnimationLength;
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| 119 | }
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| 120 | else
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| 121 | {
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| 122 | *keyFrame2 = *i;
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| 123 | t2 = (*keyFrame2)->getTime();
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| 124 | }
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| 125 |
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| 126 | t1 = (*keyFrame1)->getTime();
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| 127 |
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| 128 | if (t1 == t2)
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| 129 | {
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| 130 | // Same KeyFrame (only one)
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| 131 | return 0.0;
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| 132 | }
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| 133 | else
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| 134 | {
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| 135 | return (timePos - t1) / (t2 - t1);
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| 136 | }
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| 137 | }
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| 138 | //---------------------------------------------------------------------
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| 139 | KeyFrame* AnimationTrack::createKeyFrame(Real timePos)
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| 140 | {
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| 141 | KeyFrame* kf = new KeyFrame(this, timePos);
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| 142 |
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| 143 | // Insert at correct location
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| 144 | if (timePos > mMaxKeyFrameTime || (timePos == 0 && mKeyFrames.empty()))
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| 145 | {
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| 146 | // Quick insert at end
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| 147 | mKeyFrames.push_back(kf);
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| 148 | mMaxKeyFrameTime = timePos;
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| 149 | }
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| 150 | else
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| 151 | {
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| 152 | // Search
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| 153 | KeyFrameList::iterator i = mKeyFrames.begin();
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| 154 | while ((*i)->getTime() < timePos && i != mKeyFrames.end())
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| 155 | {
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| 156 | ++i;
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| 157 | }
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| 158 | mKeyFrames.insert(i, kf);
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| 159 | }
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| 160 |
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| 161 | _keyFrameDataChanged();
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| 162 |
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| 163 | return kf;
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| 164 |
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| 165 | }
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| 166 | //---------------------------------------------------------------------
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| 167 | void AnimationTrack::removeKeyFrame(unsigned short index)
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| 168 | {
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| 169 | // If you hit this assert, then the keyframe index is out of bounds
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| 170 | assert( index < (ushort)mKeyFrames.size() );
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| 171 |
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| 172 | KeyFrameList::iterator i = mKeyFrames.begin();
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| 173 |
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| 174 | i += index;
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| 175 |
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| 176 | delete *i;
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| 177 |
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| 178 | mKeyFrames.erase(i);
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| 179 |
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| 180 | _keyFrameDataChanged();
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| 181 |
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| 182 |
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| 183 | }
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| 184 | //---------------------------------------------------------------------
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| 185 | void AnimationTrack::removeAllKeyFrames(void)
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| 186 | {
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| 187 | KeyFrameList::iterator i = mKeyFrames.begin();
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| 188 |
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| 189 | for (; i != mKeyFrames.end(); ++i)
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| 190 | {
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| 191 | delete *i;
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| 192 | }
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| 193 |
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| 194 | _keyFrameDataChanged();
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| 195 |
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| 196 | mKeyFrames.clear();
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| 197 |
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| 198 | }
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| 199 | //---------------------------------------------------------------------
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| 200 | KeyFrame AnimationTrack::getInterpolatedKeyFrame(Real timeIndex) const
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| 201 | {
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| 202 | // Return value (note unattached)
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| 203 | KeyFrame kret(0, timeIndex);
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| 204 |
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| 205 | // Keyframe pointers
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| 206 | KeyFrame *k1, *k2;
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| 207 | unsigned short firstKeyIndex;
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| 208 |
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| 209 | Real t = this->getKeyFramesAtTime(timeIndex, &k1, &k2, &firstKeyIndex);
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| 210 |
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| 211 | if (t == 0.0)
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| 212 | {
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| 213 | // Just use k1
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| 214 | kret.setRotation(k1->getRotation());
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| 215 | kret.setTranslate(k1->getTranslate());
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| 216 | kret.setScale(k1->getScale());
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| 217 | }
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| 218 | else
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| 219 | {
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| 220 | // Interpolate by t
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| 221 | Animation::InterpolationMode im = mParent->getInterpolationMode();
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| 222 | Animation::RotationInterpolationMode rim =
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| 223 | mParent->getRotationInterpolationMode();
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| 224 | Vector3 base;
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| 225 | switch(im)
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| 226 | {
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| 227 | case Animation::IM_LINEAR:
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| 228 | // Interpolate linearly
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| 229 | // Rotation
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| 230 | // Interpolate to nearest rotation if mUseShortestRotationPath set
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| 231 | if (rim == Animation::RIM_LINEAR)
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| 232 | {
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| 233 | kret.setRotation( Quaternion::nlerp(t, k1->getRotation(),
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| 234 | k2->getRotation(), mUseShortestRotationPath) );
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| 235 | }
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| 236 | else //if (rim == Animation::RIM_SPHERICAL)
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| 237 | {
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| 238 | kret.setRotation( Quaternion::Slerp(t, k1->getRotation(),
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| 239 | k2->getRotation(), mUseShortestRotationPath) );
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| 240 | }
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| 241 |
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| 242 | // Translation
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| 243 | base = k1->getTranslate();
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| 244 | kret.setTranslate( base + ((k2->getTranslate() - base) * t) );
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| 245 |
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| 246 | // Scale
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| 247 | base = k1->getScale();
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| 248 | kret.setScale( base + ((k2->getScale() - base) * t) );
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| 249 | break;
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| 250 |
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| 251 | case Animation::IM_SPLINE:
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| 252 | // Spline interpolation
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| 253 |
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| 254 | // Build splines if required
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| 255 | if (mSplineBuildNeeded)
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| 256 | {
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| 257 | buildInterpolationSplines();
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| 258 | }
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| 259 |
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| 260 | // Rotation, take mUseShortestRotationPath into account
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| 261 | kret.setRotation( mRotationSpline.interpolate(firstKeyIndex, t,
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| 262 | mUseShortestRotationPath) );
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| 263 |
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| 264 | // Translation
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| 265 | kret.setTranslate( mPositionSpline.interpolate(firstKeyIndex, t) );
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| 266 |
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| 267 | // Scale
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| 268 | kret.setScale( mScaleSpline.interpolate(firstKeyIndex, t) );
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| 269 |
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| 270 | break;
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| 271 | }
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| 272 |
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| 273 | }
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| 274 |
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| 275 | return kret;
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| 276 |
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| 277 | }
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| 278 | //---------------------------------------------------------------------
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| 279 | void AnimationTrack::apply(Real timePos, Real weight, bool accumulate,
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| 280 | Real scale)
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| 281 | {
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| 282 | applyToNode(mTargetNode, timePos, weight, accumulate, scale);
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| 283 |
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| 284 | }
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| 285 | //---------------------------------------------------------------------
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| 286 | Node* AnimationTrack::getAssociatedNode(void) const
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| 287 | {
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| 288 | return mTargetNode;
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| 289 | }
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| 290 | //---------------------------------------------------------------------
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| 291 | void AnimationTrack::setAssociatedNode(Node* node)
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| 292 | {
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| 293 | mTargetNode = node;
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| 294 | }
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| 295 | //---------------------------------------------------------------------
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| 296 | void AnimationTrack::applyToNode(Node* node, Real timePos, Real weight,
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| 297 | bool accumulate, Real scl)
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| 298 | {
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| 299 | KeyFrame kf = this->getInterpolatedKeyFrame(timePos);
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| 300 | if (accumulate)
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| 301 | {
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| 302 | // add to existing. Weights are not relative, but treated as absolute multipliers for the animation
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| 303 | Vector3 translate = kf.getTranslate() * weight * scl;
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| 304 | node->translate(translate);
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| 305 |
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| 306 | // interpolate between no-rotation and full rotation, to point 'weight', so 0 = no rotate, 1 = full
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| 307 | Quaternion rotate;
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| 308 | Animation::RotationInterpolationMode rim =
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| 309 | mParent->getRotationInterpolationMode();
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| 310 | if (rim == Animation::RIM_LINEAR)
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| 311 | {
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| 312 | rotate = Quaternion::nlerp(weight, Quaternion::IDENTITY, kf.getRotation());
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| 313 | }
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| 314 | else //if (rim == Animation::RIM_SPHERICAL)
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| 315 | {
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| 316 | rotate = Quaternion::Slerp(weight, Quaternion::IDENTITY, kf.getRotation());
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| 317 | }
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| 318 | node->rotate(rotate);
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| 319 |
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| 320 | Vector3 scale = kf.getScale();
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| 321 | // Not sure how to modify scale for cumulative anims... leave it alone
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| 322 | //scale = ((Vector3::UNIT_SCALE - kf.getScale()) * weight) + Vector3::UNIT_SCALE;
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| 323 | if (scl != 1.0f && scale != Vector3::UNIT_SCALE)
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| 324 | {
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| 325 | scale = Vector3::UNIT_SCALE + (scale - Vector3::UNIT_SCALE) * scl;
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| 326 | }
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| 327 | node->scale(scale);
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| 328 | }
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| 329 | else
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| 330 | {
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| 331 | // apply using weighted transform method
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| 332 | Vector3 scale = kf.getScale();
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| 333 | if (scl != 1.0f && scale != Vector3::UNIT_SCALE)
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| 334 | {
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| 335 | scale = Vector3::UNIT_SCALE + (scale - Vector3::UNIT_SCALE) * scl;
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| 336 | }
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| 337 | node->_weightedTransform(weight, kf.getTranslate() * scl, kf.getRotation(),
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| 338 | scale);
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| 339 | }
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| 340 |
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| 341 | /*
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| 342 | // DEBUG
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| 343 | if (!mMainWindow)
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| 344 | {
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| 345 | mMainWindow = Root::getSingleton().getRenderWindow("OGRE Render Window");
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| 346 | }
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| 347 | String msg = "Time: ";
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| 348 | msg << timePos;
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| 349 | mMainWindow->setDebugText(msg);
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| 350 | */
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| 351 |
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| 352 | //node->rotate(kf.getRotation() * weight);
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| 353 | //node->translate(kf.getTranslate() * weight);
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| 354 |
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| 355 |
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| 356 |
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| 357 |
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| 358 | }
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| 359 | //---------------------------------------------------------------------
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| 360 | void AnimationTrack::buildInterpolationSplines(void) const
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| 361 | {
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| 362 | // Don't calc automatically, do it on request at the end
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| 363 | mPositionSpline.setAutoCalculate(false);
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| 364 | mRotationSpline.setAutoCalculate(false);
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| 365 | mScaleSpline.setAutoCalculate(false);
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| 366 |
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| 367 | mPositionSpline.clear();
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| 368 | mRotationSpline.clear();
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| 369 | mScaleSpline.clear();
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| 370 |
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| 371 | KeyFrameList::const_iterator i, iend;
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| 372 | iend = mKeyFrames.end(); // precall to avoid overhead
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| 373 | for (i = mKeyFrames.begin(); i != iend; ++i)
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| 374 | {
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| 375 | mPositionSpline.addPoint((*i)->getTranslate());
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| 376 | mRotationSpline.addPoint((*i)->getRotation());
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| 377 | mScaleSpline.addPoint((*i)->getScale());
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| 378 | }
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| 379 |
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| 380 | mPositionSpline.recalcTangents();
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| 381 | mRotationSpline.recalcTangents();
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| 382 | mScaleSpline.recalcTangents();
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| 383 |
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| 384 |
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| 385 | mSplineBuildNeeded = false;
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| 386 | }
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| 387 |
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| 388 | //---------------------------------------------------------------------
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| 389 | void AnimationTrack::setUseShortestRotationPath(bool useShortestPath)
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| 390 | {
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| 391 | mUseShortestRotationPath = useShortestPath ;
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| 392 | }
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| 393 |
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| 394 | //---------------------------------------------------------------------
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| 395 | bool AnimationTrack::getUseShortestRotationPath() const
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| 396 | {
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| 397 | return mUseShortestRotationPath ;
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| 398 | }
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| 399 | //---------------------------------------------------------------------
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| 400 | void AnimationTrack::_keyFrameDataChanged(void) const
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| 401 | {
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| 402 | mSplineBuildNeeded = true;
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| 403 | }
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| 404 | //---------------------------------------------------------------------
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| 405 | bool AnimationTrack::hasNonZeroKeyFrames(void) const
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| 406 | {
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| 407 | KeyFrameList::const_iterator i = mKeyFrames.begin();
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| 408 | for (; i != mKeyFrames.end(); ++i)
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| 409 | {
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| 410 | // look for keyframes which have any component which is non-zero
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| 411 | // Since exporters can be a little inaccurate sometimes we use a
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| 412 | // tolerance value rather than looking for nothing
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| 413 | KeyFrame* kf = *i;
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| 414 | Vector3 trans = kf->getTranslate();
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| 415 | Vector3 scale = kf->getScale();
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| 416 | Vector3 axis;
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| 417 | Radian angle;
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| 418 | kf->getRotation().ToAngleAxis(angle, axis);
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| 419 | Real tolerance = 1e-3f;
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| 420 | if (!trans.positionEquals(Vector3::ZERO, tolerance) ||
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| 421 | !scale.positionEquals(Vector3::UNIT_SCALE, tolerance) ||
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| 422 | !Math::RealEqual(angle.valueRadians(), 0.0f, tolerance))
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| 423 | {
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| 424 | return true;
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| 425 | }
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| 426 |
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| 427 | }
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| 428 |
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| 429 | return false;
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| 430 | }
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| 431 | //---------------------------------------------------------------------
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| 432 | void AnimationTrack::optimise(void)
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| 433 | {
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| 434 | // Eliminate duplicate keyframes from 2nd to penultimate keyframe
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| 435 | // NB only eliminate middle keys from sequences of 5+ identical keyframes
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| 436 | // since we need to preserve the boundary keys in place, and we need
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| 437 | // 2 at each end to preserve tangents for spline interpolation
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| 438 | Vector3 lasttrans;
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| 439 | Vector3 lastscale;
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| 440 | Quaternion lastorientation;
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| 441 | KeyFrameList::iterator i = mKeyFrames.begin();
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| 442 | Radian quatTolerance(1e-3f);
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| 443 | std::list<unsigned short> removeList;
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| 444 | unsigned short k = 0;
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| 445 | ushort dupKfCount = 0;
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| 446 | for (; i != mKeyFrames.end(); ++i, ++k)
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| 447 | {
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| 448 | KeyFrame* kf = *i;
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| 449 | Vector3 newtrans = kf->getTranslate();
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| 450 | Vector3 newscale = kf->getScale();
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| 451 | Quaternion neworientation = kf->getRotation();
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| 452 | // Ignore first keyframe; now include the last keyframe as we eliminate
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| 453 | // only k-2 in a group of 5 to ensure we only eliminate middle keys
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| 454 | if (i != mKeyFrames.begin() &&
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| 455 | newtrans.positionEquals(lasttrans) &&
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| 456 | newscale.positionEquals(lastscale) &&
|
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| 457 | neworientation.equals(lastorientation, quatTolerance))
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| 458 | {
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| 459 | ++dupKfCount;
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| 460 |
|
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| 461 | // 4 indicates this is the 5th duplicate keyframe
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| 462 | if (dupKfCount == 4)
|
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| 463 | {
|
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| 464 | // remove the 'middle' keyframe
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| 465 | removeList.push_back(k-2);
|
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| 466 | --dupKfCount;
|
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| 467 | }
|
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| 468 | }
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| 469 | else
|
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| 470 | {
|
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| 471 | // reset
|
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| 472 | dupKfCount = 0;
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| 473 | lasttrans = newtrans;
|
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| 474 | lastscale = newscale;
|
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| 475 | lastorientation = neworientation;
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| 476 | }
|
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| 477 | }
|
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| 478 |
|
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| 479 | // Now remove keyframes, in reverse order to avoid index revocation
|
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| 480 | std::list<unsigned short>::reverse_iterator r = removeList.rbegin();
|
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| 481 | for (; r!= removeList.rend(); ++r)
|
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| 482 | {
|
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| 483 | removeKeyFrame(*r);
|
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| 484 | }
|
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| 485 |
|
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| 486 |
|
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| 487 | }
|
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| 488 |
|
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| 489 | }
|
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| 490 |
|
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