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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