Make rest-frame optional (default off)

When the rest frame is included, increase the total-frame variable written to the MDD.

D1923 by @unixcyclist with edits

io_shape_mdd/__init__.py

@@ -39,7 +39,12 @@ if "bpy" in locals():
 
 
 import bpy
-from bpy.props import StringProperty, IntProperty, FloatProperty
+from bpy.props import (
+        BoolProperty,
+        FloatProperty,
+        IntProperty,
+        StringProperty,
+        )
 from bpy_extras.io_utils import ExportHelper, ImportHelper
 
 
@@ -95,7 +100,7 @@ class ExportMDD(bpy.types.Operator, ExportHelper):
 
     # get first scene to get min and max properties for frames, fps
 
-    minframe = 1
+    minframe = 0
     maxframe = 300000
     minfps = 1.0
     maxfps = 120.0
@@ -120,6 +125,11 @@ class ExportMDD(bpy.types.Operator, ExportHelper):
             min=minframe, max=maxframe,
             default=250,
             )
+    use_rest_frame = BoolProperty(
+            name="Rest Frame",
+            description="Write the rest state at the first frame",
+            default=False,
+            )
 
     @classmethod
     def poll(cls, context):

io_shape_mdd/export_mdd.py

@@ -51,7 +51,7 @@ def check_vertcount(mesh, vertcount):
         raise Exception('Error, number of verts has changed during animation, cannot export')
 
 
-def save(context, filepath="", frame_start=1, frame_end=300, fps=25.0):
+def save(context, filepath="", frame_start=1, frame_end=300, fps=25.0, use_rest_frame=False):
     """
     Blender.Window.WaitCursor(1)
 
@@ -82,6 +82,9 @@ def save(context, filepath="", frame_start=1, frame_end=300, fps=25.0):
     numverts = len(me.vertices)
 
     numframes = frame_end - frame_start + 1
+    if use_rest_frame:
+        numframes += 1
+
     f = open(filepath, 'wb')  # no Errors yet:Safe to create file
 
     # Write the header
@@ -90,10 +93,10 @@ def save(context, filepath="", frame_start=1, frame_end=300, fps=25.0):
     # Write the frame times (should we use the time IPO??)
     f.write(pack(">%df" % (numframes), *[frame / fps for frame in range(numframes)]))  # seconds
 
-    #rest frame needed to keep frames in sync
-    check_vertcount(me, numverts)
-    me.transform(mat_flip * obj.matrix_world)
-    f.write(pack(">%df" % (numverts * 3), *[axis for v in me.vertices for axis in v.co]))
+    if use_rest_frame:
+        check_vertcount(me, numverts)
+        me.transform(mat_flip * obj.matrix_world)
+        f.write(pack(">%df" % (numverts * 3), *[axis for v in me.vertices for axis in v.co]))
 
     for frame in range(frame_start, frame_end + 1):  # in order to start at desired frame
         scene.frame_set(frame)