Added dynamic module loading

d3/model/formats/__init__.py

@@ -0,0 +1,4 @@
+from os.path import dirname, basename, isfile
+import glob
+modules = glob.glob(dirname(__file__)+"/*.py")
+__all__ = [ basename(f)[:-3] for f in modules if isfile(f)]

d3/model/formats/obj.py

@@ -1,5 +1,5 @@
-from .basemodel import ModelParser, Exporter, Vertex, TexCoord, Normal, FaceVertex, Face
-from .mesh import Material, MeshPart
+from ..basemodel import ModelParser, Exporter, Vertex, TexCoord, Normal, FaceVertex, Face
+from ..mesh import Material, MeshPart
 from functools import reduce
 import os.path
 import PIL.Image

d3/model/formats/ply.py

@@ -1,4 +1,4 @@
-from .basemodel import ModelParser, Exporter, Vertex, Face, FaceVertex
+from ..basemodel import ModelParser, Exporter, Vertex, Face, FaceVertex
 
 def is_ply(filename):
     return filename[-4:] == '.ply'

d3/model/formats/stl.py

@@ -1,5 +1,5 @@
-from .basemodel import ModelParser, Exporter, Vertex, FaceVertex, Face
-from .mesh import MeshPart
+from ..basemodel import ModelParser, Exporter, Vertex, FaceVertex, Face
+from ..mesh import MeshPart
 
 import os.path
 

d3/model/tools.py

@@ -1,36 +1,58 @@
-from .obj import is_obj, OBJParser, OBJExporter
-from .ply import is_ply, PLYParser, PLYExporter
-from .stl import is_stl, STLParser, STLExporter
+import os
+from importlib import import_module
+
+from . import formats
+from .formats import *
 from .basemodel import ModelParser, Exporter
 
+from types import ModuleType
+
+supported_formats = []
+
+class ModelType:
+    def __init__(self, typename, inner_module):
+        self.typename = typename
+        self.inner_module = inner_module
+
+    def test_type(self, file):
+        return getattr(self.inner_module, 'is_' + self.typename)(file)
+
+    def create_parser(self, *args, **kwargs):
+        return getattr(self.inner_module, self.typename.upper() + 'Parser')(*args, **kwargs)
+
+    def create_exporter(self, *args, **kwargs):
+        return getattr(self.inner_module, self.typename.upper() + 'Exporter')(*args, **kwargs)
+
+def find_type(filename, supported_formats):
+    for type in supported_formats:
+        if type.test_type(filename):
+            return type
+
+for name in formats.__dict__:
+    if isinstance(formats.__dict__[name], ModuleType) and name != 'glob':
+        type = ModelType(name, formats.__dict__[name])
+        supported_formats.append(type)
+
 def load_model(path, up_conversion = None):
     parser = None
+    type = find_type(path, supported_formats)
 
-    if is_obj(path):
-        parser = OBJParser(up_conversion)
-    elif is_ply(path):
-        parser = PLYParser(up_conversion)
-    elif is_stl(path):
-        parser = STLParser(up_conversion)
-    else:
+    if type is None:
         raise Exception("File format not supported")
 
+    parser = type.create_parser(up_conversion)
     parser.parse_file(path)
 
     return parser
 
 def export_model(model, path):
     exporter = None
+    type = find_type(path, supported_formats)
 
-    if is_obj(path):
-        exporter = OBJExporter(model)
-    elif is_ply(path):
-        exporter = PLYExporter(model)
-    elif is_stl(path):
-        exporter = STLExporter(model)
-    else:
-        raise Exception("File format not supported")
+    if type is None:
+        raise Exception('File format is not supported')
 
+    exporter = type.create_exporter(model)
     return exporter
 
 def convert(input, output, up_conversion = None):