Make exporting md16 files possible.

Not sure if it actually works as the clients don't render the result
properly (can't see anything where the model should be), but the output
model does import back into blender properly.

tools/io_mesh_qfmdl/__init__.py

@@ -88,6 +88,9 @@ class QFMDLSettings(bpy.types.PropertyGroup):
     script = StringProperty(
         name="Script",
         description="Script for animating frames and skins")
+    md16 = BoolProperty(
+        name="16-bit",
+        description="16 bit vertex coordinates: QuakeForge only")
 
 class ImportMDL6(bpy.types.Operator, ImportHelper):
     '''Load a Quake MDL (v6) File'''
@@ -140,6 +143,7 @@ class MDLPanel(bpy.types.Panel):
         layout.prop(obj.qfmdl, "rotate")
         layout.prop(obj.qfmdl, "effects")
         layout.prop(obj.qfmdl, "script")
+        layout.prop(obj.qfmdl, "md16")
 
 def menu_func_import(self, context):
     self.layout.operator(ImportMDL6.bl_idname, text="Quake MDL (.mdl)")

tools/io_mesh_qfmdl/export_mdl.py

@@ -175,6 +175,8 @@ def get_properties(operator, mdl, obj):
     mdl.synctype = MDL.SYNCTYPE[obj.qfmdl.synctype]
     mdl.flags = ((obj.qfmdl.rotate and MDL.EF_ROTATE or 0)
                  | MDL.EFFECTS[obj.qfmdl.effects])
+    if obj.qfmdl.md16:
+        mdl.ident = "MD16"
     script = obj.qfmdl.script
     mdl.script = None
     if script:

tools/io_mesh_qfmdl/import_mdl.py

@@ -333,6 +333,7 @@ def set_properties(mdl):
     mdl.obj.qfmdl.rotate = (mdl.flags & MDL.EF_ROTATE) and True or False
     mdl.obj.qfmdl.effects = parse_flags(mdl.flags)
     mdl.obj.qfmdl.script = mdl.text.name #FIXME really want the text object
+    mdl.obj.qfmdl.md16 = (mdl.ident == "MD16")
 
 def import_mdl(operator, context, filepath):
     bpy.context.user_preferences.edit.use_global_undo = False

tools/io_mesh_qfmdl/mdl.py

@@ -218,7 +218,7 @@ class MDL:
         def write_verts(self, mdl):
             for vert in self.verts:
                 vert.write(mdl, True)
-            if mdl.ident == 'MD16' and high:
+            if mdl.ident == 'MD16':
                 for vert in self.verts:
                     vert.write(mdl, False)
 
@@ -304,9 +304,9 @@ class MDL:
         data = data.encode()
         self.write_bytes(data, size)
 
-    def __init__(self, name = "mdl"):
+    def __init__(self, name = "mdl", md16 = False):
         self.name = name
-        self.ident = "IDPO"     #only 8 bit for now
+        self.ident = md16 and "MD16" or "IDPO"
         self.version = 6        #write only version 6 (nothing usable uses 3)
         self.scale = (1.0, 1.0, 1.0)        #FIXME
         self.scale_origin = (0.0, 0.0, 0.0) #FIXME