Added ply2obj, it is now working

model.py

@@ -58,7 +58,7 @@ class ModelParser:
     def add_normal(self, normal):
         self.normals.append(normal)
 
-    def addFace(self, face):
+    def add_face(self, face):
         self.faces.append(face)
 
     def parse_line(self, string):

obj.py

@@ -30,7 +30,7 @@ class OBJParser(ModelParser):
                     if splits[i][j] is not '':
                         splits[i][j] = str(int(splits[i][j]) - 1)
 
-            self.addFace(Face().from_array(splits))
+            self.add_face(Face().from_array(splits))
 
 class OBJExporter(Exporter):
     def __init__(self, model):
@@ -40,15 +40,17 @@ class OBJExporter(Exporter):
         string = ""
 
         for vertex in self.model.vertices:
-            string += "n " + ' '.join([vertex.x, vertex.y, vertex.z]) + "\n"
+            string += "v " + ' '.join([vertex.x, vertex.y, vertex.z]) + "\n"
 
         string += "\n"
 
+        if len(self.model.tex_coords) > 0:
             for tex_coord in self.model.tex_coords:
                 string += "vt " + ' '.join([tex_coord.x, tex_coord.y]) + "\n"
 
             string += "\n"
 
+        if len(self.model.normals) > 0:
             for normal in self.model.normals:
                 string += "vn " + ' '.join([normal.x, normal.y, normal.z]) + "\n"
 
@@ -59,15 +61,15 @@ class OBJExporter(Exporter):
             arr = []
             for v in [face.a, face.b, face.c]:
                 sub_arr = []
-                sub_arr.append(v.vertex)
+                sub_arr.append(str(int(v.vertex) + 1))
                 if v.normal is None:
                     if v.texture is not None:
                         sub_arr.append('')
-                        sub_arr.append(v.texture)
+                        sub_arr.append(str(int(v.texture) + 1))
                 elif v.texture is not None:
-                    sub_arr.append(v.texture)
+                    sub_arr.append(str(int(v.texture) + 1))
                     if v.normal is not None:
-                        sub_arr.append(v.normal)
+                        sub_arr.append(str(int(v.normal + 1)))
                 arr.append('/'.join(sub_arr))
 
             string += ' '.join(arr) + '\n'

ply.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 
-from model import ModelParser, Exporter, Vertex, Face
+from model import ModelParser, Exporter, Vertex, Face, FaceVertex
 
 class PLYParser(ModelParser):
 
@@ -11,7 +11,7 @@ class PLYParser(ModelParser):
         self.inner_parser = PLYHeaderParser(self)
 
     def parse_line(self, string):
-        self.inner_parser.parse_line(self, string)
+        self.inner_parser.parse_line(string)
 
 class PLYHeaderParser:
     def __init__(self, parent):
@@ -45,7 +45,7 @@ class PLYElement:
         self.number = number
         self.properties = []
 
-    def add_property(name, type):
+    def add_property(self, name, type):
         self.properties.append((name, type))
 
 class PLYContentParser:
@@ -56,19 +56,22 @@ class PLYContentParser:
         self.current_element = self.parent.elements[0]
 
     def parse_line(self, string):
-        self.counter += 1
 
         split = string.split(' ')
 
         if self.current_element.name == 'vertex':
-            self.parent.add_vertex(Vertex.from_array(split))
+            self.parent.add_vertex(Vertex().from_array(split))
         elif self.current_element.name == 'face':
-            self.parent.add_face(Face(split[1], split[2], split[3]))
+            self.parent.add_face(Face(FaceVertex(split[1]), FaceVertex(split[2]), FaceVertex(split[3])))
 
         self.counter += 1
 
+        if self.counter == self.current_element.number:
+            self.next_element()
+
     def next_element(self):
         self.element_index += 1
+        if self.element_index < len(self.parent.elements):
             self.current_element = self.parent.elements[self.element_index]
 
 class PLYExporter(Exporter):

ply2obj.py

@@ -0,0 +1,42 @@
+#!/usr/bin/env python3
+
+import argparse
+import os
+
+from obj import OBJExporter
+from ply import PLYParser
+from functools import partial
+
+def check_path(path, should_exist):
+    """ Check that a path (file or folder) exists or not and return it.
+    """
+    path = os.path.normpath(path)
+    if should_exist != os.path.exists(path):
+        msg = "path " + ("does not" if should_exist else "already") + " exist: " + path
+        raise argparse.ArgumentTypeError(msg)
+    return path
+
+def main(args):
+    parser = PLYParser()
+    parser.parse_file(args.input)
+    exporter = OBJExporter(parser)
+    result = str(exporter)
+
+    if args.output is None:
+        print(result)
+    else:
+        with open(args.output, 'w') as f:
+            f.write(result)
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser()
+    parser.set_defaults(func=main)
+    parser.add_argument('-v', '--version', action='version', version='1.0')
+    parser.add_argument('-i', '--input', metavar='input',
+                        type=partial(check_path, should_exist=True), default=None,
+                        help='Input file (.obj)')
+    parser.add_argument('-o', '--output', metavar='output',
+                        help='Output path')
+    args = parser.parse_args()
+    args.func(args)
+