io_import_max.py

@@ -48,6 +48,18 @@ class Import_max(bpy.types.Operator, bpy_extras.io_utils.ImportHelper):
     filename_ext = ".max"
     filter_glob: bpy.props.StringProperty(default="*.max", options={'HIDDEN'},)
 
+    scale_objects: bpy.props.FloatProperty(name="Scale",
+        description="Scale factor for all objects",
+        min=0.0, max=10000.0,
+        soft_min=0.0, soft_max=10000.0,
+        default=1.0,
+        )
+
+    use_apply_matrix: bpy.props.BoolProperty(name="Apply Matrix",
+        description="Use matrix to transform the objects",
+        default=True,
+        )
+
     def execute(self, context):
         keywords = self.as_keywords(ignore=("axis_forward", "axis_up", "filter_glob"))
         global_matrix = axis_conversion(from_forward=self.axis_forward, from_up=self.axis_up,).to_4x4()
@@ -200,6 +212,11 @@ def _clsid(clsid):
             ((i32(clsid, 0), i16(clsid, 4), i16(clsid, 6)) +
             tuple(map(i8, clsid[8:16]))))
 
+
+###############
+# DATA IMPORT #
+###############
+
 def is_maxfile (filename):
     """Test if file is a MAX OLE2 container."""
     if hasattr(filename, 'read'):
@@ -671,6 +688,10 @@ class ImportMaxFile:
         return data
 
 
+###################
+# DATA PROCESSING #
+###################
+
 class MaxChunk():
     """Representing a chunk of a .max file."""
     def __init__(self, types, size, level, number):
@@ -1120,6 +1141,24 @@ def create_matrix(prc):
     return mtx
 
 
+def get_matrix_mesh_material(node):
+    refs = get_reference(node)
+    if (refs):
+        mtx = refs.get(0, None)
+        msh = refs.get(1, None)
+        mat = refs.get(3, None)
+        lyr = refs.get(6, None)
+    else:
+        refs = get_references(node)
+        mtx = refs[0]
+        msh = refs[1]
+        mat = refs[3]
+        lyr = None
+        if (len(refs) > 6):
+            lyr = refs[6]
+    return mtx, msh, mat, lyr
+
+
 def get_property(properties, idx):
     for child in properties.children:
         if (child.types & 0x100E):
@@ -1216,12 +1255,18 @@ def adjust_material(obj, mat):
             objMaterial.roughness = 1.0 - material.get('shinines', 0.6)
 
 
-def create_shape(context, pts, indices, node, key, prc, mat):
+def adjust_matrix(obj, node):
+    mtx = create_matrix(node).flatten()
+    plc = mathutils.Matrix(*mtx)
+    obj.matrix_world = plc
+    return plc
+
+
+def create_shape(context, pts, indices, node, key, mtx, mat):
     name = node.get_first(TYP_NAME).data
     shape = bpy.data.meshes.new(name)
     if (key is not None):
         name = "%s_%d" %(name, key)
-    mtx = create_matrix(prc)
     data = []
     if (pts):
         loopstart = []
@@ -1247,6 +1292,7 @@ def create_shape(context, pts, indices, node, key, prc, mat):
         obj = bpy.data.objects.new(name, shape)
         context.view_layer.active_layer_collection.collection.objects.link(obj)
         adjust_material(obj, mat)
+        obj.matrix_world = mtx
         return True
     return True
 
@@ -1391,31 +1437,6 @@ def create_editable_mesh(context, node, msh, mat, mtx):
     return created
 
 
-def get_matrix_mesh_material(node):
-    refs = get_reference(node)
-    if (refs):
-        mtx = refs.get(0, None)
-        msh = refs.get(1, None)
-        mat = refs.get(3, None)
-        lyr = refs.get(6, None)
-    else:
-        refs = get_references(node)
-        mtx = refs[0]
-        msh = refs[1]
-        mat = refs[3]
-        lyr = None
-        if (len(refs) > 6):
-            lyr = refs[6]
-    return mtx, msh, mat, lyr
-
-
-def adjust_matrix(obj, node):
-    mtx = create_matrix(node).flatten()
-    plc = mathutils.Matrix(*mtx)
-    obj.matrix_world = plc
-    return plc
-
-
 def create_shell(context, node, shell, mat, mtx):
     name = node.get_first(TYP_NAME).data
     refs = get_references(shell)
@@ -1424,7 +1445,7 @@ def create_shell(context, node, shell, mat, mtx):
     return created
 
 
-def create_skipable(context, node, msh, mat, mtx, skip):
+def create_skipable(context, node, skip):
     name = node.get_first(TYP_NAME).data
     print("    skipping %s '%s'... " %(skip, name))
     return True
@@ -1443,11 +1464,11 @@ def create_mesh(context, node, msh, mtx, mat):
     else:
         skip = SKIPPABLE.get(uid)
         if (skip is not None):
-            created = create_skipable(context, node, msh, mat, mtx, skip)
+            created = create_skipable(context, node, skip)
     return created, uid
 
 
-def create_object(context, node):
+def create_object(context, node, mscale, transform):
     parent = get_node_parent(node)
     node.parent = parent
     name = get_node_name(node)
@@ -1458,26 +1479,30 @@ def create_object(context, node):
         if (parent_mtx):
             mtx = mtx.dot(parent_mtx)
         parent = get_node_parent(parent)
+    if (transform):
+        mtx = create_matrix(mtx) @ mscale
+    else:
+        mtx = mscale
     created, uid = create_mesh(context, node, msh, mtx, mat)
 
 
-def make_scene(context, parent, level=0):
+def make_scene(context, mscale, transform, parent, level=0):
     for chunk in parent.children:
         if (isinstance(chunk, SceneChunk)):
             if ((get_guid(chunk) == 0x0001) and (get_super_id(chunk) == 0x0001)):
                 try:
-                    create_object(context, chunk)
+                    create_object(context, chunk, mscale, transform)
                 except Exception as exc:
                     print('ImportError:', exc, chunk)
 
 
-def read_scene(context, maxfile, filename):
+def read_scene(context, maxfile, filename, mscale, transform):
     global SCENE_LIST
     SCENE_LIST = read_chunks(maxfile, 'Scene', filename+'.Scn.bin', containerReader=SceneChunk)
-    make_scene(context, SCENE_LIST[0], 0)
+    make_scene(context, mscale, transform, SCENE_LIST[0], 0)
 
 
-def read(context, filename):
+def read(context, filename, mscale, transform):
     if (is_maxfile(filename)):
         maxfile = ImportMaxFile(filename)
         prop = maxfile.getproperties('\x05DocumentSummaryInformation', convert_time=True, no_conversion=[10])
@@ -1487,12 +1512,15 @@ def read(context, filename):
         read_directory(maxfile, filename)
         read_class_directory(maxfile, filename)
         read_video_postqueue(maxfile, filename)
-        read_scene(context, maxfile, filename)
+        read_scene(context, maxfile, filename, mscale, transform)
     else:
         print("File seems to be no 3D Studio Max file!")
 
 
-def load(operator, context, filepath="", global_matrix=None):
+def load(operator, context, filepath="", scale_objects=1.0, use_apply_matrix=False, global_matrix=None):
-    read(context, filepath)
+    mscale = mathutils.Matrix.Scale(scale_objects, 4)
+    if global_matrix is not None:
+        mscale = global_matrix @ mscale   
+    read(context, filepath, mscale, transform=use_apply_matrix)
 
     return {'FINISHED'}