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e8da6131fd
Move copyright text to SPDX-FileCopyrightText or set to the Blender Foundation so "make check_licenses" now runs without warnings.
108 lines
3.1 KiB
Python
108 lines
3.1 KiB
Python
# SPDX-FileCopyrightText: 2011-2022 Blender Foundation
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#
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# SPDX-License-Identifier: GPL-2.0-or-later
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# Contributors: Bill L.Nieuwendorp
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"""
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This script Exports Lightwaves MotionDesigner format.
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The .mdd format has become quite a popular Pipeline format<br>
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for moving animations from package to package.
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Be sure not to use modifiers that change the number or order of verts in the mesh
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"""
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import bpy
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import mathutils
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from struct import pack
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def zero_file(filepath):
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"""
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If a file fails, this replaces it with 1 char, better not remove it?
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"""
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file = open(filepath, 'w')
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file.write('\n') # apparently macosx needs some data in a blank file?
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file.close()
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def check_vertcount(mesh, vertcount):
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"""
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check and make sure the vertcount is consistent throughout the frame range
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"""
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if len(mesh.vertices) != vertcount:
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raise Exception('Error, number of verts has changed during animation, cannot export')
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def save(context, filepath="", frame_start=1, frame_end=300, fps=25.0, use_rest_frame=False):
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"""
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Blender.Window.WaitCursor(1)
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mesh_orig = Mesh.New()
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mesh_orig.getFromObject(obj.name)
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"""
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scene = context.scene
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obj = context.object
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if bpy.ops.object.mode_set.poll():
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bpy.ops.object.mode_set(mode='OBJECT')
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orig_frame = scene.frame_current
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scene.frame_set(frame_start)
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depsgraph = context.evaluated_depsgraph_get()
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obj_eval = obj.evaluated_get(depsgraph)
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me = obj_eval.to_mesh()
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#Flip y and z
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'''
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mat_flip = mathutils.Matrix(((1.0, 0.0, 0.0, 0.0),
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(0.0, 0.0, 1.0, 0.0),
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(0.0, 1.0, 0.0, 0.0),
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(0.0, 0.0, 0.0, 1.0),
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))
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'''
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mat_flip = mathutils.Matrix()
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numverts = len(me.vertices)
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numframes = frame_end - frame_start + 1
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if use_rest_frame:
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numframes += 1
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f = open(filepath, 'wb') # no Errors yet:Safe to create file
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# Write the header
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f.write(pack(">2i", numframes, numverts))
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# Write the frame times (should we use the time IPO??)
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f.write(pack(">%df" % (numframes), *[frame / fps for frame in range(numframes)])) # seconds
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if use_rest_frame:
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check_vertcount(me, numverts)
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me.transform(mat_flip @ obj.matrix_world)
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f.write(pack(">%df" % (numverts * 3), *[axis for v in me.vertices for axis in v.co]))
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obj_eval.to_mesh_clear()
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for frame in range(frame_start, frame_end + 1): # in order to start at desired frame
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scene.frame_set(frame)
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depsgraph = context.evaluated_depsgraph_get()
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obj_eval = obj.evaluated_get(depsgraph)
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me = obj_eval.to_mesh()
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check_vertcount(me, numverts)
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me.transform(mat_flip @ obj.matrix_world)
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# Write the vertex data
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f.write(pack(">%df" % (numverts * 3), *[axis for v in me.vertices for axis in v.co]))
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obj_eval.to_mesh_clear()
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f.close()
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print('MDD Exported: %r frames:%d\n' % (filepath, numframes - 1))
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scene.frame_set(orig_frame)
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return {'FINISHED'}
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