| [6] | 1 | """Armature and armature animation export classes. |
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| 2 | |
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| 3 | @author Michael Reimpell |
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| 4 | """ |
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| 5 | # Copyright (C) 2005 Michael Reimpell |
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| 6 | # |
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| 7 | # This library is free software; you can redistribute it and/or |
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| 8 | # modify it under the terms of the GNU Lesser General Public |
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| 9 | # License as published by the Free Software Foundation; either |
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| 10 | # version 2.1 of the License, or (at your option) any later version. |
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| 11 | # |
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| 12 | # This library is distributed in the hope that it will be useful, |
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| 13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | # Lesser General Public License for more details. |
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| 16 | # |
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| 17 | # You should have received a copy of the GNU Lesser General Public |
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| 18 | # License along with this library; if not, write to the Free Software |
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| 19 | # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | |
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| 21 | # epydoc doc format |
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| 22 | __docformat__ = "javadoc en" |
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| 23 | |
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| 24 | import base |
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| 25 | from base import * |
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| 26 | |
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| 27 | import math |
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| 28 | import Blender |
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| 29 | import Blender.Mathutils |
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| 30 | from Blender.Mathutils import * |
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| 31 | |
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| 32 | # TODO: Facade for Blender objects |
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| 33 | def GetArmatureObject(bObject): |
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| 34 | """Returns Blender armature object of this Blender object or <code>None</code>. |
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| 35 | |
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| 36 | Armatures are either parented or listed in the modifier stack of the object to deform. |
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| 37 | """ |
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| 38 | bArmatureObject = None |
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| 39 | if (bObject.getType() == "Mesh"): |
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| 40 | # parented armatures get preferred |
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| 41 | bParentObject = bObject.getParent() |
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| 42 | if (bParentObject and (bParentObject.getType() == "Armature")): |
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| 43 | bArmatureObject = bParentObject |
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| 44 | else: |
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| 45 | # check modifier stack, use last armature modifier |
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| 46 | for modifier in bObject.modifiers: |
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| 47 | if ((modifier.type == Blender.Modifier.Type['ARMATURE']) |
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| 48 | and modifier[Blender.Modifier.Settings.VERTGROUP]): |
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| 49 | bArmatureObject = modifier[Blender.Modifier.Settings.OBJECT] |
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| 50 | return bArmatureObject |
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| 51 | |
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| 52 | class ArmatureAction: |
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| 53 | """Manages a Blender action. |
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| 54 | """ |
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| 55 | def __init__(self, bAction, armatureExporter): |
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| 56 | self.bAction = bAction |
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| 57 | self.armatureExporter = armatureExporter |
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| 58 | return |
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| 59 | def getName(self): |
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| 60 | return self.bAction.getName() |
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| 61 | def hasEffect(self): |
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| 62 | """If true, the action has an effect on at least one bone of the armature. |
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| 63 | """ |
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| 64 | hasEffect = 0 |
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| 65 | channelIpoDict = self.bAction.getAllChannelIpos() |
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| 66 | channelIterator = iter(channelIpoDict) |
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| 67 | try: |
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| 68 | while not(hasEffect): |
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| 69 | channelName = channelIterator.next() |
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| 70 | if ((channelName in self.armatureExporter.boneIndices.keys()) |
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| 71 | and channelIpoDict[channelName].getNcurves()): |
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| 72 | hasEffect = 1 |
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| 73 | except StopIteration: |
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| 74 | pass |
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| 75 | return hasEffect |
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| 76 | |
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| 77 | class ArmatureActionManager: |
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| 78 | def __init__(self, armatureExporter): |
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| 79 | self.armatureExporter = armatureExporter |
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| 80 | self.actionList = [] |
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| 81 | for bAction in Blender.Armature.NLA.GetActions().values(): |
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| 82 | action = ArmatureAction(bAction, self.armatureExporter) |
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| 83 | if action.hasEffect(): |
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| 84 | self.actionList.append(action) |
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| 85 | return |
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| 86 | def __iter__(self): |
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| 87 | return ArmatureActionManager.Iterator(self) |
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| 88 | def getActions(self): |
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| 89 | return self.actionList |
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| 90 | class Iterator: |
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| 91 | """Iterates over ArmatureActions. |
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| 92 | """ |
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| 93 | def __init__(self, armatureActionManager): |
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| 94 | self.armatureActionManager = armatureActionManager |
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| 95 | self.listIndex = 0 |
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| 96 | return |
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| 97 | def next(self): |
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| 98 | if self.listIndex >= len(self.armatureActionManager.actionList): |
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| 99 | raise StopIteration |
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| 100 | self.listIndex = self.listIndex + 1 |
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| 101 | return self.armatureActionManager.actionList[self.listIndex - 1] |
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| 102 | |
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| 103 | class ArmatureAnimation: |
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| 104 | """Resembles Blender's action actuators. |
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| 105 | """ |
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| 106 | def __init__(self, bAction, name, startFrame, endFrame): |
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| 107 | """Constructor |
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| 108 | |
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| 109 | @param bAction Blender action of the animation |
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| 110 | @param name Animation name |
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| 111 | @param startFrame first frame of the animation |
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| 112 | @param endFrame last frame of the animation |
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| 113 | """ |
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| 114 | self.bAction = bAction |
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| 115 | self.name = name |
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| 116 | self.startFrame = startFrame |
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| 117 | self.endFrame = endFrame |
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| 118 | # populated on export |
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| 119 | self.length = None |
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| 120 | self.trackList = None |
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| 121 | return |
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| 122 | def getName(self): |
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| 123 | return self.name |
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| 124 | def export(self, armatureExporter, fps): |
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| 125 | """Export animation to OGRE. |
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| 126 | |
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| 127 | @fps frames per second. Has to be larger than zero. |
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| 128 | """ |
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| 129 | # store current settings |
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| 130 | frameAtExportTime = Blender.Get('curframe') |
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| 131 | actionAtExportTime = armatureExporter.getArmatureObject().getAction() |
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| 132 | |
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| 133 | # total animation time |
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| 134 | startFrame = int(self.startFrame) |
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| 135 | endFrame = int(self.endFrame) |
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| 136 | if (self.endFrame < self.startFrame): |
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| 137 | # TODO backward animation |
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| 138 | startFrame = self.endFrame |
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| 139 | endFrame = self.startFrame |
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| 140 | Log.getSingleton().logError("Start frame after end frame in animation \"%s\"" % self.name) |
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| 141 | self.length = (endFrame - startFrame)/float(fps) |
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| 142 | |
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| 143 | # enable action |
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| 144 | self.bAction.setActive(armatureExporter.getArmatureObject()) |
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| 145 | Blender.Window.Redraw() |
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| 146 | |
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| 147 | ## create track for all OGRE bones |
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| 148 | stack = [] |
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| 149 | for bone in armatureExporter.getRootSkeletonBoneList(): |
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| 150 | stack.append(SkeletonAnimationTrack(armatureExporter, bone)) |
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| 151 | rootTrackList = stack[:] |
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| 152 | self.trackList = stack[:] |
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| 153 | # precondition: stack contains all root tracks |
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| 154 | while (len(stack) > 0): |
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| 155 | parentTrack = stack.pop(0) |
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| 156 | for bone in parentTrack.getSkeletonBone().getChildren(): |
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| 157 | track = SkeletonAnimationTrack(armatureExporter, bone, parentTrack) |
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| 158 | stack.append(track) |
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| 159 | self.trackList.append(track) |
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| 160 | # postcondition: every SkeletonBone has a corresponding track |
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| 161 | |
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| 162 | ## export pose frame by frame |
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| 163 | bArmatureObject = armatureExporter.getArmatureObject() |
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| 164 | meshObjectSpaceTransformation = armatureExporter.getAdditionalRootBoneTransformation() |
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| 165 | for frame in range(startFrame, endFrame + 1): |
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| 166 | # frameTime |
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| 167 | frameTime = (frame - startFrame)/float(fps) |
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| 168 | |
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| 169 | # evaluate pose for current frame |
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| 170 | Blender.Set('curframe', frame) |
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| 171 | Blender.Window.Redraw() |
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| 172 | bArmatureObject.evaluatePose(frame) |
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| 173 | pose = bArmatureObject.getPose() |
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| 174 | |
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| 175 | # tracks on the stack do not have unprocessed parent tracks |
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| 176 | stack = rootTrackList[:] |
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| 177 | # set keyframes |
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| 178 | while (len(stack) > 0): |
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| 179 | track = stack.pop(0) |
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| 180 | track.addKeyframe(pose, frameTime, meshObjectSpaceTransformation) |
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| 181 | stack.extend(track.getChildren()) |
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| 182 | |
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| 183 | # remove unused tracks |
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| 184 | ## TODO |
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| 185 | |
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| 186 | # restore current settings |
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| 187 | # FIXME: does not work with multiple actions |
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| 188 | actionAtExportTime.setActive(armatureExporter.getArmatureObject()) |
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| 189 | Blender.Set('curframe', frameAtExportTime) |
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| 190 | armatureExporter.getArmatureObject().evaluatePose(frameAtExportTime) |
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| 191 | return |
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| 192 | def write(self, f, indentation=0): |
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| 193 | Log.getSingleton().logInfo("Writing skeleton animation \"%s\"." % self.name) |
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| 194 | f.write(indent(indentation) + "<animation name=\"%s\" length=\"%f\">\n" % (self.name, self.length)) |
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| 195 | if (len(self.trackList) > 0): |
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| 196 | f.write(indent(indentation + 1) + "<tracks>\n") |
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| 197 | for track in self.trackList: |
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| 198 | track.write(f, indentation + 2) |
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| 199 | f.write(indent(indentation + 1) + "</tracks>\n") |
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| 200 | f.write(indent(indentation) + "</animation>\n") |
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| 201 | return |
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| 202 | |
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| 203 | class SkeletonBone: |
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| 204 | """Bone of an Ogre sekeleton. |
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| 205 | """ |
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| 206 | def __init__(self, armatureExporter, bBone, parent=None): |
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| 207 | """Constructor. |
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| 208 | |
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| 209 | @param armatureExporter ArmatureExporter, required for bone ids. |
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| 210 | @param bBone Blender bone. |
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| 211 | @param parent Parent SkeletonBone. |
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| 212 | """ |
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| 213 | self.armatureExporter = armatureExporter |
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| 214 | self.bBone = bBone |
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| 215 | self.parent = parent |
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| 216 | self.children = [] |
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| 217 | self.ogreRestMatrix = None |
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| 218 | self.inverseTotalTransformation = None |
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| 219 | # register as child of parent |
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| 220 | if self.parent is not None: |
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| 221 | self.parent.addChild(self) |
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| 222 | return |
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| 223 | def addChild(self, child): |
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| 224 | """Appends a child bone. |
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| 225 | |
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| 226 | This method gets called from the constructor of SkeletonBone. |
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| 227 | |
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| 228 | @param child SkeletonBone. |
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| 229 | """ |
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| 230 | self.children.append(child) |
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| 231 | return |
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| 232 | def getName(self): |
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| 233 | return self.bBone.name |
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| 234 | def getParent(self): |
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| 235 | return self.parent |
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| 236 | def getChildren(self): |
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| 237 | # return new list in order to avoid side effects |
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| 238 | return self.children[:] |
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| 239 | def getBlenderBone(self): |
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| 240 | return self.bBone |
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| 241 | def getOgreRestMatrix(self): |
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| 242 | """Returns a copy of the rest matrix. |
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| 243 | """ |
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| 244 | if self.ogreRestMatrix is None: |
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| 245 | raise AssertionError('OGRE rest matrix not set for this bone!') |
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| 246 | return Blender.Mathutils.Matrix(*self.ogreRestMatrix) |
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| 247 | def getInverseTotalTransformation(self): |
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| 248 | return Blender.Mathutils.Matrix(*self.inverseTotalTransformation) |
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| 249 | def setOgreRestMatrix(self): |
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| 250 | """Sets rest transformation in OGRE. |
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| 251 | |
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| 252 | Note that the parent bone rest matrix is required to be valid! |
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| 253 | """ |
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| 254 | # Warning: Blender uses left multiplication vector*matrix |
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| 255 | # get bone matrix of OGRE parent bone |
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| 256 | inverseParentMatrix = Matrix([1,0,0,0],[0,1,0,0],[0,0,1,0],[0,0,0,1]) |
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| 257 | if self.parent is not None: |
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| 258 | inverseParentMatrix = self.parent.getInverseTotalTransformation() |
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| 259 | |
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| 260 | # bone matrix relative to armature object |
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| 261 | self.ogreRestMatrix = Blender.Mathutils.Matrix(*self.bBone.matrix['ARMATURESPACE']) |
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| 262 | # relative to mesh object origin |
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| 263 | self.ogreRestMatrix *= self.armatureExporter.getAdditionalRootBoneTransformation() |
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| 264 | # store total transformation |
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| 265 | self.inverseTotalTransformation = Blender.Mathutils.Matrix(*self.ogreRestMatrix) |
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| 266 | self.inverseTotalTransformation.invert() |
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| 267 | # relative to OGRE parent bone origin |
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| 268 | self.ogreRestMatrix *= inverseParentMatrix |
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| 269 | return |
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| 270 | def writeBone(self, f, indentation=0): |
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| 271 | f.write(indent(indentation) + "<bone id=\"%d\" name=\"%s\">\n" |
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| 272 | % (self.armatureExporter.getBoneIndex(self.getName()), self.getName())) |
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| 273 | # get transformation values |
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| 274 | positionTuple = tuple(self.ogreRestMatrix.translationPart()) |
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| 275 | rotationQuaternion = self.ogreRestMatrix.toQuat() |
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| 276 | rotationQuaternion.normalize() |
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| 277 | angle = float(rotationQuaternion.angle)/180*math.pi |
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| 278 | axisTuple = tuple(rotationQuaternion.axis) |
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| 279 | # Blender bones do not have scale in rest position |
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| 280 | #scaleTuple = tuple(self.ogreRestMatrix.scalePart()) |
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| 281 | # write transformation values |
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| 282 | f.write(indent(indentation + 1) + "<position x=\"%.6f\" y=\"%.6f\" z=\"%.6f\"/>\n" % positionTuple) |
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| 283 | f.write(indent(indentation + 1) + "<rotation angle=\"%.6f\">\n" % angle) |
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| 284 | f.write(indent(indentation + 2) + "<axis x=\"%.6f\" y=\"%.6f\" z=\"%.6f\"/>\n" % axisTuple) |
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| 285 | f.write(indent(indentation + 1) + "</rotation>\n") |
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| 286 | f.write(indent(indentation) + "</bone>\n") |
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| 287 | return |
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| 288 | |
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| 289 | class SkeletonAnimationTrack: |
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| 290 | def __init__(self, armatureExporter, skeletonBone, parent=None): |
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| 291 | """Animation track for an OGRE bone. |
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| 292 | |
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| 293 | @param parent parent track. |
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| 294 | """ |
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| 295 | self.armatureExporter = armatureExporter |
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| 296 | self.skeletonBone = skeletonBone |
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| 297 | self.parent = parent |
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| 298 | self.children = [] |
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| 299 | # key: time, value: keyframe matrix. |
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| 300 | self.keyframeDict = {} |
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| 301 | # cache name |
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| 302 | self.name = self.skeletonBone.getName() |
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| 303 | # cache restpose |
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| 304 | self.ogreRestPose = self.skeletonBone.getOgreRestMatrix() |
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| 305 | self.inverseOgreRestPose = self.skeletonBone.getOgreRestMatrix() |
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| 306 | self.inverseOgreRestPose.invert() |
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| 307 | |
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| 308 | # (pose_matrix * additionalRootBoneTransformation)^(-1) of last keyframe |
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| 309 | self.inverseLastKeyframeTotalTransformation = None |
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| 310 | |
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| 311 | # register as child of parent |
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| 312 | if self.parent is not None: |
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| 313 | self.parent.addChild(self) |
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| 314 | return |
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| 315 | def getSkeletonBone(self): |
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| 316 | return self.skeletonBone |
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| 317 | def getChildren(self): |
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| 318 | return self.children |
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| 319 | def addChild(self, child): |
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| 320 | """Appends a child track. |
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| 321 | |
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| 322 | This method gets called from the constructor of SkeletonAnimationTrack. |
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| 323 | |
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| 324 | @param child SkeletonAnimationTrack. |
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| 325 | """ |
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| 326 | self.children.append(child) |
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| 327 | return |
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| 328 | def nKeyframes(self): |
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| 329 | return len(self.keyframeDict) |
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| 330 | def getInverseLastKeyframeTotalTransformation(self): |
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| 331 | """Returns a copy of (pose_matrix * additionalRootBoneTransformation)^(-1) |
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| 332 | of last keyframe. |
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| 333 | |
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| 334 | Called from addKeyframe of child tracks. |
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| 335 | """ |
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| 336 | return Blender.Mathutils.Matrix(*self.inverseLastKeyframeTotalTransformation) |
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| 337 | def addKeyframe(self, pose, time, additionalRootBoneTransformation): |
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| 338 | """Adds current pose as keyframe. |
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| 339 | |
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| 340 | @param additionalRootBoneTransformation transformation from local armature |
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| 341 | object space to the mesh object coordinate system. |
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| 342 | """ |
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| 343 | # Warning: Blender uses left multiplication vector*matrix |
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| 344 | # |
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| 345 | # Blender Bone coordinates in armature object space are |
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| 346 | # (x,y,z,w) * pose_matrix |
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| 347 | # Hence coordinates in meshObject coordinate system are |
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| 348 | # (x,y,z,w) * pose_matrix * additionalRootBoneTransformation. |
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| 349 | # |
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| 350 | poseTransformation = Blender.Mathutils.Matrix(*pose.bones[self.name].poseMatrix) |
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| 351 | poseTransformation *= additionalRootBoneTransformation |
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| 352 | |
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| 353 | self.inverseLastKeyframeTotalTransformation = Blender.Mathutils.Matrix(*poseTransformation) |
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| 354 | self.inverseLastKeyframeTotalTransformation.invert() |
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| 355 | |
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| 356 | # calculate difference to parent bone |
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| 357 | if self.parent is not None: |
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| 358 | poseTransformation *= self.parent.getInverseLastKeyframeTotalTransformation() |
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| 359 | |
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| 360 | self.keyframeDict[time] = Blender.Mathutils.Matrix(*poseTransformation) |
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| 361 | return |
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| 362 | def write(self, f, indentation=0): |
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| 363 | # write optimized keyframes |
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| 364 | if (len(self.keyframeDict) > 0): |
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| 365 | f.write(indent(indentation) + "<track bone=\"%s\">\n" % self.name) |
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| 366 | f.write(indent(indentation + 1) + "<keyframes>\n") |
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| 367 | # write keyframes |
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| 368 | keyframeTimes = self.keyframeDict.keys() |
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| 369 | keyframeTimes.sort() |
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| 370 | for time in keyframeTimes: |
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| 371 | f.write(indent(indentation + 2) + "<keyframe time=\"%f\">\n" % time) |
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| 372 | transformation = self.keyframeDict[time] |
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| 373 | # get transformation values |
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| 374 | # translation relative to parent coordinate system orientation |
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| 375 | # and as difference to rest pose translation |
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| 376 | translation = transformation.translationPart() |
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| 377 | translation -= self.ogreRestPose.translationPart() |
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| 378 | translationTuple = tuple(translation) |
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| 379 | # rotation relative to local coordiante system |
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| 380 | # calculate difference to rest pose |
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| 381 | transformation *= self.inverseOgreRestPose |
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| 382 | rotationQuaternion = transformation.toQuat() |
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| 383 | rotationQuaternion.normalize() |
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| 384 | angle = float(rotationQuaternion.angle)/180*math.pi |
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| 385 | axisTuple = tuple(rotationQuaternion.axis) |
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| 386 | scaleTuple = tuple(transformation.scalePart()) |
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| 387 | # write transformation values |
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| 388 | f.write(indent(indentation + 3) + "<translate x=\"%.6f\" y=\"%.6f\" z=\"%.6f\"/>\n" % translationTuple) |
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| 389 | f.write(indent(indentation + 3) + "<rotate angle=\"%.6f\">\n" % angle) |
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| 390 | f.write(indent(indentation + 4) + "<axis x=\"%.6f\" y=\"%.6f\" z=\"%.6f\"/>\n" % axisTuple) |
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| 391 | f.write(indent(indentation + 3) + "</rotate>\n") |
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| 392 | f.write(indent(indentation + 3) + "<scale x=\"%.6f\" y=\"%.6f\" z=\"%.6f\"/>\n" % scaleTuple) |
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| 393 | f.write(indent(indentation + 2) + "</keyframe>\n") |
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| 394 | f.write(indent(indentation + 1) + "</keyframes>\n") |
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| 395 | f.write(indent(indentation) + "</track>\n") |
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| 396 | return |
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| 397 | def optimizeKeyframes(self): |
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| 398 | """Reduce number of keyframes. |
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| 399 | |
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| 400 | Note that you can't reduce keyframes locally when using |
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| 401 | Catmull-Rom spline interpolation. Doing so would result in |
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| 402 | wrong tangents. |
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| 403 | """ |
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| 404 | return |
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| 405 | |
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| 406 | class ArmatureExporter: |
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| 407 | """Exports Blender armature and its animations. |
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| 408 | |
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| 409 | Only bones with enabled deform button get exported. |
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| 410 | """ |
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| 411 | def __init__(self, bMeshObject, bArmatureObject): |
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| 412 | """Constructor. |
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| 413 | """ |
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| 414 | # Note: getName() and getBoneIndex(boneName) already work prior to export. |
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| 415 | self.bMeshObject = bMeshObject |
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| 416 | self.bArmatureObject = bArmatureObject |
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| 417 | # cache Blender Armature |
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| 418 | self.bArmature = bArmatureObject.getData() |
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| 419 | # name, needed as mesh's skeletonlink name |
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| 420 | # As there may be an additional transformation between bMeshObject and bArmatureObject, |
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| 421 | # it is generally not possible to share the armature between several meshes. |
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| 422 | self.name = self.bMeshObject.getName() + "-" + self.bArmatureObject.getData(True) |
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| 423 | # boneindices, needed for mesh's vertexboneassignments |
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| 424 | # key = boneName, value = boneIndex |
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| 425 | boneNameList = [bone.name for bone in self.bArmature.bones.values() if (Blender.Armature.NO_DEFORM not in bone.options)] |
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| 426 | self.boneIndices = dict(zip(boneNameList, range(len(boneNameList)))) |
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| 427 | # actions |
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| 428 | self.actionManager = ArmatureActionManager(self) |
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| 429 | # animations to export |
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| 430 | self.animationList = [] |
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| 431 | # populated on export |
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| 432 | self.skeletonBoneList = None |
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| 433 | self.rootSkeletonBoneList = None |
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| 434 | self.additionalRootBoneTransformation = None |
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| 435 | return |
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| 436 | def addAnimation(self, animation): |
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| 437 | """Adds animation to export. |
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| 438 | |
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| 439 | @param animation ArmatureAnimation |
|---|
| 440 | """ |
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| 441 | self.animationList.append(animation) |
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| 442 | return |
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| 443 | def export(self, dir, parentTransform, convertXML=False): |
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| 444 | self._convertBoneHierarchy() |
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| 445 | self._convertRestpose() |
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| 446 | self._convertAnimations() |
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| 447 | self.write(dir, convertXML) |
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| 448 | return |
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| 449 | def getName(self): |
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| 450 | return self.name |
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| 451 | def getArmatureObject(self): |
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| 452 | return self.bArmatureObject |
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| 453 | def getMeshObject(self): |
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| 454 | return self.bMeshObject |
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| 455 | def getBoneIndex(self, boneName): |
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| 456 | """Returns bone index for a given bone name. |
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| 457 | |
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| 458 | @param boneName Name of the bone. |
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| 459 | @return Bone index or <code>None</code> if a bone with the given name does not exist. |
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| 460 | """ |
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| 461 | if self.boneIndices.has_key(boneName): |
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| 462 | index = self.boneIndices[boneName] |
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| 463 | else: |
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| 464 | index = None |
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| 465 | return index |
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| 466 | def getActions(self): |
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| 467 | """Returns list of available actions. |
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| 468 | """ |
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| 469 | return self.actionManager.getActions() |
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| 470 | def getAdditionalRootBoneTransformation(self): |
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| 471 | """Retruns transformation from Blender's armature object coordinate system |
|---|
| 472 | to Blender's mesh object coordinate system. |
|---|
| 473 | """ |
|---|
| 474 | return self.additionalRootBoneTransformation |
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| 475 | def getSkeletonBoneList(self): |
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| 476 | """Returns list of all OGRE bones. |
|---|
| 477 | """ |
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| 478 | return self.skeletonBoneList |
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| 479 | def getRootSkeletonBoneList(self): |
|---|
| 480 | """Returns list of all OGRE root bones. |
|---|
| 481 | """ |
|---|
| 482 | return self.rootSkeletonBoneList |
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| 483 | def write(self, dir, convertXML=False): |
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| 484 | Log.getSingleton().logInfo("Exporting armature \"%s\"" % self.getName()) |
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| 485 | filename = Blender.sys.join(dir, self.getName() + ".skeleton.xml") |
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| 486 | f = open(filename, "w") |
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| 487 | f.write(indent(0) + "<skeleton>\n") |
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| 488 | self._writeRestpose(f, 1) |
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| 489 | self._writeBoneHierarchy(f, 1) |
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| 490 | self._writeAnimations(f, 1) |
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| 491 | f.write(indent(0) + "</skeleton>\n") |
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| 492 | f.close() |
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| 493 | if convertXML: |
|---|
| 494 | OgreXMLConverter.getSingleton().convert(filename) |
|---|
| 495 | return |
|---|
| 496 | def _generateActionList(self): |
|---|
| 497 | return |
|---|
| 498 | def _convertBoneHierarchy(self): |
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| 499 | self.skeletonBoneList = [] |
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| 500 | ## find root bones |
|---|
| 501 | self.rootSkeletonBoneList = [] |
|---|
| 502 | for bBone in self.bArmature.bones.values(): |
|---|
| 503 | # export this bone? |
|---|
| 504 | if (Blender.Armature.NO_DEFORM not in bBone.options): |
|---|
| 505 | # find possible parent bone, that gets exported. |
|---|
| 506 | found = False |
|---|
| 507 | current = bBone |
|---|
| 508 | while (not(found) and current.hasParent()): |
|---|
| 509 | current = current.parent |
|---|
| 510 | if (Blender.Armature.NO_DEFORM not in current.options): |
|---|
| 511 | found = True |
|---|
| 512 | if not(found): |
|---|
| 513 | # bone is root bone |
|---|
| 514 | rootBone = SkeletonBone(self, bBone) |
|---|
| 515 | self.rootSkeletonBoneList.append(rootBone) |
|---|
| 516 | self.skeletonBoneList.append(rootBone) |
|---|
| 517 | # postcondition: rootSkeletonBoneList contains root bones |
|---|
| 518 | ## find child bones |
|---|
| 519 | stack = self.rootSkeletonBoneList[:] |
|---|
| 520 | # bones on the stack do not have unprocessed parent bones |
|---|
| 521 | while (len(stack)): |
|---|
| 522 | parent = stack.pop(0) |
|---|
| 523 | # check for child bones |
|---|
| 524 | if parent.getBlenderBone().hasChildren(): |
|---|
| 525 | children = parent.getBlenderBone().children[:] |
|---|
| 526 | while (len(children)): |
|---|
| 527 | bBone = children.pop() |
|---|
| 528 | if Blender.Armature.NO_DEFORM in bBone.options: |
|---|
| 529 | # children of child are possible children |
|---|
| 530 | children.extend(bBone.children) |
|---|
| 531 | else: |
|---|
| 532 | # child found |
|---|
| 533 | child = SkeletonBone(self, bBone, parent) |
|---|
| 534 | stack.append(child) |
|---|
| 535 | self.skeletonBoneList.append(child) |
|---|
| 536 | # postcondition: all bones processed, self.skeletonBoneList contains all bones to export |
|---|
| 537 | return |
|---|
| 538 | def _convertRestpose(self): |
|---|
| 539 | """Convert rest pose of Blender skeleton. |
|---|
| 540 | |
|---|
| 541 | Note that not every Blender bone has a corresponding OGRE bone. |
|---|
| 542 | Root bones need an additional transformation caused by the |
|---|
| 543 | possibliy different object coordinate systems of Blender's |
|---|
| 544 | armature object and Blender's mesh object. |
|---|
| 545 | """ |
|---|
| 546 | # Warning: Blender uses left-multiplication: vector*matrix |
|---|
| 547 | |
|---|
| 548 | # additional transformation caused by the objects |
|---|
| 549 | inverseMeshObjectMatrix = Blender.Mathutils.Matrix(*self.bMeshObject.getMatrix()) |
|---|
| 550 | inverseMeshObjectMatrix.invert() |
|---|
| 551 | armatureObjectMatrix = Blender.Mathutils.Matrix(*self.bArmatureObject.getMatrix()) |
|---|
| 552 | |
|---|
| 553 | # additional transformation for root bones: |
|---|
| 554 | # from armature object space into mesh object space, i.e., |
|---|
| 555 | # (x,y,z,w)*AO*MO^(-1) |
|---|
| 556 | self.additionalRootBoneTransformation = armatureObjectMatrix*inverseMeshObjectMatrix |
|---|
| 557 | |
|---|
| 558 | stack = self.rootSkeletonBoneList[:] |
|---|
| 559 | # precondition: stack contains all root bones, bone hierarchy is fixed |
|---|
| 560 | while (len(stack) > 0): |
|---|
| 561 | bone = stack.pop(0) |
|---|
| 562 | bone.setOgreRestMatrix() |
|---|
| 563 | stack.extend(bone.getChildren()) |
|---|
| 564 | return |
|---|
| 565 | def _restPoseMesh(self): |
|---|
| 566 | """Converts skeleton to mesh. |
|---|
| 567 | """ |
|---|
| 568 | # TODO |
|---|
| 569 | return |
|---|
| 570 | def _writeRestpose(self, f, indentation=0): |
|---|
| 571 | f.write(indent(indentation) + "<bones>\n") |
|---|
| 572 | for bone in self.skeletonBoneList: |
|---|
| 573 | bone.writeBone(f, indentation + 1) |
|---|
| 574 | f.write(indent(indentation) + "</bones>\n") |
|---|
| 575 | return |
|---|
| 576 | def _writeBoneHierarchy(self, f, indentation=0): |
|---|
| 577 | f.write(indent(indentation) + "<bonehierarchy>\n") |
|---|
| 578 | for bone in self.skeletonBoneList: |
|---|
| 579 | if bone.getParent() is not None: |
|---|
| 580 | f.write(indent(indentation + 1) + "<boneparent bone=\"%s\" parent=\"%s\" />\n" |
|---|
| 581 | % (bone.getName(), bone.getParent().getName())) |
|---|
| 582 | f.write(indent(indentation) + "</bonehierarchy>\n") |
|---|
| 583 | return |
|---|
| 584 | def _convertAnimations(self): |
|---|
| 585 | if (len(self.animationList) > 0): |
|---|
| 586 | # store current settings |
|---|
| 587 | frameAtExportTime = Blender.Get('curframe') |
|---|
| 588 | actionAtExportTime = self.bArmatureObject.getAction() |
|---|
| 589 | |
|---|
| 590 | # frames per second |
|---|
| 591 | fps = Blender.Scene.GetCurrent().getRenderingContext().framesPerSec() |
|---|
| 592 | |
|---|
| 593 | animationNameList = [] |
|---|
| 594 | for animation in self.animationList: |
|---|
| 595 | # warn on morph animation name clash |
|---|
| 596 | animationName = animation.getName() |
|---|
| 597 | if animationName in animationNameList: |
|---|
| 598 | Log.getSingleton().logWarning("Duplicate animation name \"%s\" for skeleton \"%s\"!" \ |
|---|
| 599 | % (animationName, self.getName())) |
|---|
| 600 | animationNameList.append(animationName) |
|---|
| 601 | # export |
|---|
| 602 | animation.export(self, fps) |
|---|
| 603 | |
|---|
| 604 | # restore current settings |
|---|
| 605 | Blender.Set('curframe', frameAtExportTime) |
|---|
| 606 | actionAtExportTime.setActive(self.bArmatureObject) |
|---|
| 607 | return |
|---|
| 608 | def _writeAnimations(self, f, indentation=0): |
|---|
| 609 | if (len(self.animationList) > 0): |
|---|
| 610 | f.write(indent(indentation) + "<animations>\n") |
|---|
| 611 | for animation in self.animationList: |
|---|
| 612 | animation.write(f, indentation + 1) |
|---|
| 613 | f.write(indent(indentation) + "</animations>\n") |
|---|
| 614 | return |
|---|
