From 6d3cedc0b16fa030dfceff28aa75640b2cba33ea Mon Sep 17 00:00:00 2001
From: aramis_acg <aramis_acg@67173fc5-114c-0410-ac8e-9d2fd5bffc1f>
Date: Sat, 10 Nov 2012 16:01:55 +0000
Subject: [PATCH] - add missing files from the last commit

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@1334 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
---
 port/PyAssimp/README.md                |  74 ++++
 port/PyAssimp/pyassimp/core.py         | 415 +++++++++++++++++++
 port/PyAssimp/pyassimp/postprocess.py  | 529 +++++++++++++++++++++++++
 port/PyAssimp/scripts/opengl_viewer.py | 421 ++++++++++++++++++++
 port/PyAssimp/scripts/quicktest.py     |  45 +++
 port/PyAssimp/scripts/sample.py        |  81 ++++
 port/PyAssimp/setup.py                 |  13 +
 7 files changed, 1578 insertions(+)
 create mode 100644 port/PyAssimp/README.md
 create mode 100644 port/PyAssimp/pyassimp/core.py
 create mode 100644 port/PyAssimp/pyassimp/postprocess.py
 create mode 100755 port/PyAssimp/scripts/opengl_viewer.py
 create mode 100755 port/PyAssimp/scripts/quicktest.py
 create mode 100755 port/PyAssimp/scripts/sample.py
 create mode 100644 port/PyAssimp/setup.py

diff --git a/port/PyAssimp/README.md b/port/PyAssimp/README.md
new file mode 100644
index 000000000..5bec88711
--- /dev/null
+++ b/port/PyAssimp/README.md
@@ -0,0 +1,74 @@
+PyAssimp Readme
+===============
+
+-- a simple Python wrapper for Assimp using ctypes to access
+the library. Requires Python >= 2.6.
+
+Python 3 support is mostly here, but not well tested.
+
+Note that pyassimp is not complete. Many ASSIMP features are missing. In
+particular, only loading of models is currently supported (no export).
+
+USAGE
+-----
+
+To get started with pyAssimp, examine the sample.py script in scripts/, which
+illustrates the basic usage. All Assimp data structures are wrapped using
+ctypes. All the data+length fields in Assimp's data structures (such as
+'aiMesh::mNumVertices','aiMesh::mVertices') are replaced by simple python
+lists, so you can call len() on them to get their respective size and access
+members using [].
+
+For example, to load a file named 'hello.3ds' and print the first
+vertex of the first mesh, you would do (proper error handling
+substituted by assertions ...):
+
+```python
+
+from pyassimp.core import *
+scene = load('hello.3ds')
+
+assert len(scene.meshes)
+mesh = scene.meshes[0]
+
+assert len(mesh.vertices)
+print(mesh.vertices[0])
+
+# don't forget this one, or you will leak!
+release(scene)
+
+```
+
+Another example to list the 'top nodes' in a
+scene:
+
+```python
+
+from pyassimp.core import *
+scene = load('hello.3ds')
+
+for c in scene.rootnode.children:
+    print(str(c))
+
+release(scene)
+
+```
+
+INSTALL
+-------
+
+Install pyassimp by running:
+
+> python setup.py install
+
+PyAssimp requires a assimp dynamic library (DLL on windows,
+so on linux :-) in order to work. The default search directories 
+are:
+
+- the current directory
+- on linux additionally: /usr/lib and /usr/local/lib
+
+To build that library, refer to the Assimp master INSTALL
+instructions. To look in more places, edit ./pyassimp/helper.py.
+There's an 'additional_dirs' list waiting for your entries.
+
diff --git a/port/PyAssimp/pyassimp/core.py b/port/PyAssimp/pyassimp/core.py
new file mode 100644
index 000000000..731dcd5a3
--- /dev/null
+++ b/port/PyAssimp/pyassimp/core.py
@@ -0,0 +1,415 @@
+#-*- coding: UTF-8 -*-
+
+"""
+PyAssimp
+
+This is the main-module of PyAssimp.
+"""
+
+import sys
+if sys.version_info < (2,6):
+    raise 'pyassimp: need python 2.6 or newer'
+
+
+import ctypes
+import os
+import numpy
+
+import logging; logger = logging.getLogger("pyassimp")
+
+# Attach a default, null handler, to the logger.
+# applications can easily get log messages from pyassimp
+# by calling for instance
+# >>> logging.basicConfig(level=logging.DEBUG)
+# before importing pyassimp
+class NullHandler(logging.Handler):
+    def emit(self, record):
+        pass
+h = NullHandler()
+logger.addHandler(h)
+
+from . import structs
+from .errors import AssimpError
+from . import helper
+
+
+assimp_structs_as_tuple = (
+        structs.Matrix4x4, 
+        structs.Matrix3x3, 
+        structs.Vector2D, 
+        structs.Vector3D, 
+        structs.Color3D, 
+        structs.Color4D, 
+        structs.Quaternion, 
+        structs.Plane, 
+        structs.Texel)
+
+def make_tuple(ai_obj, type = None):
+    res = None
+
+    if isinstance(ai_obj, structs.Matrix4x4):
+        res = numpy.array([getattr(ai_obj, e[0]) for e in ai_obj._fields_]).reshape((4,4))
+        #import pdb;pdb.set_trace()
+    elif isinstance(ai_obj, structs.Matrix3x3):
+        res = numpy.array([getattr(ai_obj, e[0]) for e in ai_obj._fields_]).reshape((3,3))
+    else:
+        res = numpy.array([getattr(ai_obj, e[0]) for e in ai_obj._fields_])
+
+    return res
+
+def call_init(obj, caller = None):
+        # init children
+        if hasattr(obj, '_init'):
+            obj._init(parent = caller)
+
+        # pointers
+        elif hasattr(obj, 'contents'):
+            if hasattr(obj.contents, '_init'):
+                obj.contents._init(target = obj, parent = caller)
+
+
+
+def _init(self, target = None, parent = None):
+    """
+    Custom initialize() for C structs, adds safely accessable member functionality.
+
+    :param target: set the object which receive the added methods. Useful when manipulating
+    pointers, to skip the intermediate 'contents' deferencing.
+    """
+    if hasattr(self, '_is_init'):
+        return self
+    self._is_init = True
+    
+    if not target:
+        target = self
+
+    for m in dir(self):
+
+        name = m[1:].lower()
+
+        if m.startswith("_"):
+            continue
+
+        obj = getattr(self, m)
+
+        if m.startswith('mNum'):
+            if 'm' + m[4:] in dir(self):
+                continue # will be processed later on
+            else:
+                setattr(target, name, obj)
+
+
+
+        # Create tuples
+        if isinstance(obj, assimp_structs_as_tuple):
+            setattr(target, name, make_tuple(obj))
+            logger.debug(str(self) + ": Added array " + str(getattr(target, name)) +  " as self." + name.lower())
+            continue
+
+
+        if isinstance(obj, structs.String):
+            setattr(target, 'name', str(obj.data))
+            setattr(target.__class__, '__repr__', lambda x: str(x.__class__) + "(" + x.name + ")")
+            setattr(target.__class__, '__str__', lambda x: x.name)
+            continue
+        
+
+        if m.startswith('m'):
+
+            if name == "parent":
+                setattr(target, name, parent)
+                logger.debug("Added a parent as self." + name)
+                continue
+
+            if hasattr(self, 'mNum' + m[1:]):
+
+                length =  getattr(self, 'mNum' + m[1:])
+    
+                # -> special case: properties are
+                # stored as a dict.
+                if m == 'mProperties':
+                    setattr(target, name, _get_properties(obj, length))
+                    continue
+
+
+                if not length: # empty!
+                    setattr(target, name, [])
+                    logger.debug(str(self) + ": " + name + " is an empty list.")
+                    continue
+                
+
+                try:
+                    if obj._type_ in assimp_structs_as_tuple:
+                        setattr(target, name, numpy.array([make_tuple(obj[i]) for i in range(length)], dtype=numpy.float32))
+
+                        logger.debug(str(self) + ": Added an array of numpy arrays (type "+ str(type(obj)) + ") as self." + name)
+
+                    else:
+                        setattr(target, name, [obj[i] for i in range(length)]) #TODO: maybe not necessary to recreate an array?
+
+                        logger.debug(str(self) + ": Added list of " + str(obj) + " " + name + " as self." + name + " (type: " + str(type(obj)) + ")")
+
+                        # initialize array elements
+                        for e in getattr(target, name):
+                            call_init(e, caller = target)
+
+
+                except IndexError:
+                    logger.error("in " + str(self) +" : mismatch between mNum" + name + " and the actual amount of data in m" + name + ". This may be due to version mismatch between libassimp and pyassimp. Quitting now.")
+                    sys.exit(1)
+
+                except ValueError as e:
+                    
+                    logger.error("In " + str(self) +  "->" + name + ": " + str(e) + ". Quitting now.")
+                    if "setting an array element with a sequence" in str(e):
+                        logger.error("Note that pyassimp does not currently "
+                                     "support meshes with mixed triangles "
+                                     "and quads. Try to load your mesh with"
+                                     " a post-processing to triangulate your"
+                                     " faces.")
+                    sys.exit(1)
+
+
+            else: # starts with 'm' but not iterable
+
+                setattr(target, name, obj)
+                logger.debug("Added " + name + " as self." + name + " (type: " + str(type(obj)) + ")")
+
+                call_init(obj, caller = target)
+
+
+
+
+    if isinstance(self, structs.Mesh):
+        _finalize_mesh(self, target)
+
+    if isinstance(self, structs.Texture):
+        _finalize_texture(self, target)
+
+
+    return self
+
+
+"""
+Python magic to add the _init() function to all C struct classes.
+"""
+for struct in dir(structs):
+    if not (struct.startswith('_') or struct.startswith('c_') or struct == "Structure" or struct == "POINTER") and not isinstance(getattr(structs, struct),int):
+
+        setattr(getattr(structs, struct), '_init', _init)
+
+
+class AssimpLib(object):
+    """
+    Assimp-Singleton
+    """
+    load, release, dll = helper.search_library()
+
+#the loader as singleton
+_assimp_lib = AssimpLib()
+
+def pythonize_assimp(type, obj, scene):
+    """ This method modify the Assimp data structures
+    to make them easier to work with in Python.
+
+    Supported operations:
+     - MESH: replace a list of mesh IDs by reference to these meshes
+     - ADDTRANSFORMATION: add a reference to an object's transformation taken from their associated node.
+
+    :param type: the type of modification to operate (cf above)
+    :param obj: the input object to modify
+    :param scene: a reference to the whole scene
+    """
+
+    if type == "MESH":
+        meshes = []
+        for i in obj:
+            meshes.append(scene.meshes[i])
+        return meshes
+
+    if type == "ADDTRANSFORMATION":
+
+        def getnode(node, name):
+            if node.name == name: return node
+            for child in node.children:
+                n = getnode(child, name)
+                if n: return n
+
+        node = getnode(scene.rootnode, obj.name)
+        if not node:
+            raise AssimpError("Object " + str(obj) + " has no associated node!")
+        setattr(obj, "transformation", node.transformation)
+
+
+def recur_pythonize(node, scene):
+    """ Recursively call pythonize_assimp on
+    nodes tree to apply several post-processing to
+    pythonize the assimp datastructures.
+    """
+
+    node.meshes = pythonize_assimp("MESH", node.meshes, scene)
+
+    for mesh in node.meshes:
+        mesh.material = scene.materials[mesh.materialindex]
+
+    for cam in scene.cameras:
+        pythonize_assimp("ADDTRANSFORMATION", cam, scene)
+
+    #for light in scene.lights:
+    #    pythonize_assimp("ADDTRANSFORMATION", light, scene)
+
+    for c in node.children:
+        recur_pythonize(c, scene)
+
+
+def load(filename, processing=0):
+    """
+    Loads the model with some specific processing parameters.
+
+    filename - file to load model from
+    processing - processing parameters
+
+    result Scene-object with model-data
+
+    throws AssimpError - could not open file
+    """
+    #read pure data
+    #from ctypes import c_char_p, c_uint
+    #model = _assimp_lib.load(c_char_p(filename), c_uint(processing))
+    model = _assimp_lib.load(filename.encode("ascii"), processing)
+    if not model:
+        #Uhhh, something went wrong!
+        raise AssimpError("could not import file: %s" % filename)
+
+    scene = model.contents._init()
+
+    recur_pythonize(scene.rootnode, scene)
+
+    return scene
+
+def release(scene):
+    from ctypes import pointer
+    _assimp_lib.release(pointer(scene))
+
+def _finalize_texture(tex, target):
+    setattr(target, "achformathint", tex.achFormatHint)
+    data = numpy.array([make_tuple(getattr(tex, pcData)[i]) for i in range(tex.mWidth * tex.mHeight)])
+    setattr(target, "data", data)
+
+
+
+def _finalize_mesh(mesh, target):
+    """ Building of meshes is a bit specific.
+
+    We override here the various datasets that can
+    not be process as regular fields.
+
+    For instance, the length of the normals array is
+    mNumVertices (no mNumNormals is available)
+    """
+    nb_vertices = getattr(mesh, "mNumVertices")
+
+    def fill(name):
+        mAttr = getattr(mesh, name)
+        if mAttr:
+            data = numpy.array([make_tuple(getattr(mesh, name)[i]) for i in range(nb_vertices)], dtype=numpy.float32)
+            setattr(target, name[1:].lower(), data)
+        else:
+            setattr(target, name[1:].lower(), [])
+
+    def fillarray(name):
+        mAttr = getattr(mesh, name)
+
+        data = []
+        for index, mSubAttr in enumerate(mAttr):
+            if mSubAttr:
+                data.append([make_tuple(getattr(mesh, name)[index][i]) for i in range(nb_vertices)])
+
+        setattr(target, name[1:].lower(), numpy.array(data, dtype=numpy.float32))
+
+    fill("mNormals")
+    fill("mTangents")
+    fill("mBitangents")
+
+    fillarray("mColors")
+    fillarray("mTextureCoords")
+    
+    # prepare faces
+    faces = numpy.array([f.indices for f in target.faces], dtype=numpy.int32)
+    setattr(target, 'faces', faces)
+
+def _get_properties(properties, length): 
+    """
+    Convenience Function to get the material properties as a dict
+    and values in a python format.
+    """
+    result = {}
+    #read all properties
+    for p in [properties[i] for i in range(length)]:
+        #the name
+        p = p.contents
+        key = str(p.mKey.data)
+
+        #the data
+        from ctypes import POINTER, cast, c_int, c_float, sizeof
+        if p.mType == 1:
+            arr = cast(p.mData, POINTER(c_float * int(p.mDataLength/sizeof(c_float)) )).contents
+            value = numpy.array([x for x in arr])
+        elif p.mType == 3: #string can't be an array
+            value = cast(p.mData, POINTER(structs.String)).contents.data
+        elif p.mType == 4:
+            arr = cast(p.mData, POINTER(c_int * int(p.mDataLength/sizeof(c_int)) )).contents
+            value = numpy.array([x for x in arr])
+        else:
+            value = p.mData[:p.mDataLength]
+
+        result[key] = value
+
+    return result
+
+def aiGetMaterialFloatArray(material, key):
+    AI_SUCCESS = 0
+    from ctypes import byref, pointer, cast, c_float, POINTER, sizeof, c_uint
+    out = structs.Color4D()
+    max = c_uint(sizeof(structs.Color4D))
+    r=_assimp_lib.dll.aiGetMaterialFloatArray(pointer(material), 
+                                            key[0], 
+                                            key[1], 
+                                            key[2], 
+                                            byref(out), 
+                                            byref(max))
+                                            
+    if (r != AI_SUCCESS):    
+        raise AssimpError("aiGetMaterialFloatArray failed!")
+      
+    out._init()
+    return [out[i] for i in range(max.value)]
+    
+def aiGetMaterialString(material, key):
+    AI_SUCCESS = 0
+    from ctypes import byref, pointer, cast, c_float, POINTER, sizeof, c_uint
+    out = structs.String()
+    r=_assimp_lib.dll.aiGetMaterialString(pointer(material), 
+                                            key[0], 
+                                            key[1], 
+                                            key[2], 
+                                            byref(out))
+                                            
+    if (r != AI_SUCCESS):    
+        raise AssimpError("aiGetMaterialString failed!")
+        
+    return str(out.data)
+
+    
+    
+def decompose_matrix(matrix):
+    if not isinstance(matrix, structs.Matrix4x4):
+        raise AssimpError("pyassimp.decompose_matrix failed: Not a Matrix4x4!")
+    
+    scaling = structs.Vector3D()
+    rotation = structs.Quaternion()
+    position = structs.Vector3D()
+    
+    from ctypes import byref, pointer
+    _assimp_lib.dll.aiDecomposeMatrix(pointer(matrix), byref(scaling), byref(rotation), byref(position))
+    return scaling._init(), rotation._init(), position._init()
diff --git a/port/PyAssimp/pyassimp/postprocess.py b/port/PyAssimp/pyassimp/postprocess.py
new file mode 100644
index 000000000..932c7c660
--- /dev/null
+++ b/port/PyAssimp/pyassimp/postprocess.py
@@ -0,0 +1,529 @@
+# <hr>Calculates the tangents and bitangents for the imported meshes. 
+#
+# Does nothing if a mesh does not have normals. You might want this post 
+# processing step to be executed if you plan to use tangent space calculations 
+# such as normal mapping  applied to the meshes. There's a config setting,
+# <tt>#AI_CONFIG_PP_CT_MAX_SMOOTHING_ANGLE<tt>, which allows you to specify
+# a maximum smoothing angle for the algorithm. However, usually you'll
+# want to leave it at the default value.
+#
+aiProcess_CalcTangentSpace = 0x1
+
+## <hr>Identifies and joins identical vertex data sets within all 
+#  imported meshes. 
+# 
+# After this step is run, each mesh contains unique vertices,
+# so a vertex may be used by multiple faces. You usually want
+# to use this post processing step. If your application deals with
+# indexed geometry, this step is compulsory or you'll just waste rendering
+# time. <b>If this flag is not specified<b>, no vertices are referenced by
+# more than one face and <b>no index buffer is required<b> for rendering.
+#
+aiProcess_JoinIdenticalVertices = 0x2
+
+## <hr>Converts all the imported data to a left-handed coordinate space. 
+#
+# By default the data is returned in a right-handed coordinate space (which 
+# OpenGL prefers). In this space, +X points to the right, 
+# +Z points towards the viewer, and +Y points upwards. In the DirectX 
+# coordinate space +X points to the right, +Y points upwards, and +Z points 
+# away from the viewer.
+#
+# You'll probably want to consider this flag if you use Direct3D for
+# rendering. The #aiProcess_ConvertToLeftHanded flag supersedes this
+# setting and bundles all conversions typically required for D3D-based
+# applications.
+#
+aiProcess_MakeLeftHanded = 0x4
+
+## <hr>Triangulates all faces of all meshes. 
+#
+# By default the imported mesh data might contain faces with more than 3
+# indices. For rendering you'll usually want all faces to be triangles. 
+# This post processing step splits up faces with more than 3 indices into 
+# triangles. Line and point primitives are #not# modified! If you want
+# 'triangles only' with no other kinds of primitives, try the following
+# solution:
+# <ul>
+# <li>Specify both #aiProcess_Triangulate and #aiProcess_SortByPType <li>
+# <li>Ignore all point and line meshes when you process assimp's output<li>
+# <ul>
+#
+aiProcess_Triangulate = 0x8
+
+## <hr>Removes some parts of the data structure (animations, materials, 
+#  light sources, cameras, textures, vertex components).
+#
+# The  components to be removed are specified in a separate
+# configuration option, <tt>#AI_CONFIG_PP_RVC_FLAGS<tt>. This is quite useful
+# if you don't need all parts of the output structure. Vertex colors
+# are rarely used today for example... Calling this step to remove unneeded
+# data from the pipeline as early as possible results in increased 
+# performance and a more optimized output data structure.
+# This step is also useful if you want to force Assimp to recompute 
+# normals or tangents. The corresponding steps don't recompute them if 
+# they're already there (loaded from the source asset). By using this 
+# step you can make sure they are NOT there.
+#
+# This flag is a poor one, mainly because its purpose is usually
+# misunderstood. Consider the following case: a 3D model has been exported
+# from a CAD app, and it has per-face vertex colors. Vertex positions can't be
+# shared, thus the #aiProcess_JoinIdenticalVertices step fails to
+# optimize the data because of these nasty little vertex colors.
+# Most apps don't even process them, so it's all for nothing. By using
+# this step, unneeded components are excluded as early as possible
+# thus opening more room for internal optimizations. 
+#
+aiProcess_RemoveComponent = 0x10
+
+## <hr>Generates normals for all faces of all meshes. 
+#
+# This is ignored if normals are already there at the time this flag 
+# is evaluated. Model importers try to load them from the source file, so
+# they're usually already there. Face normals are shared between all points
+# of a single face, so a single point can have multiple normals, which
+# forces the library to duplicate vertices in some cases.
+# #aiProcess_JoinIdenticalVertices is #senseless# then.
+#
+# This flag may not be specified together with #aiProcess_GenSmoothNormals.
+#
+aiProcess_GenNormals = 0x20
+
+## <hr>Generates smooth normals for all vertices in the mesh.
+#
+# This is ignored if normals are already there at the time this flag 
+# is evaluated. Model importers try to load them from the source file, so
+# they're usually already there. 
+#
+# This flag may not be specified together with 
+# #aiProcess_GenNormals. There's a configuration option, 
+# <tt>#AI_CONFIG_PP_GSN_MAX_SMOOTHING_ANGLE<tt> which allows you to specify
+# an angle maximum for the normal smoothing algorithm. Normals exceeding
+# this limit are not smoothed, resulting in a 'hard' seam between two faces.
+# Using a decent angle here (e.g. 80 degrees) results in very good visual
+# appearance.
+#
+aiProcess_GenSmoothNormals = 0x40
+
+## <hr>Splits large meshes into smaller sub-meshes.
+#
+# This is quite useful for real-time rendering, where the number of triangles
+# which can be maximally processed in a single draw-call is limited 
+# by the video driverhardware. The maximum vertex buffer is usually limited
+# too. Both requirements can be met with this step: you may specify both a 
+# triangle and vertex limit for a single mesh.
+#
+# The split limits can (and should!) be set through the 
+# <tt>#AI_CONFIG_PP_SLM_VERTEX_LIMIT<tt> and <tt>#AI_CONFIG_PP_SLM_TRIANGLE_LIMIT<tt> 
+# settings. The default values are <tt>#AI_SLM_DEFAULT_MAX_VERTICES<tt> and 
+# <tt>#AI_SLM_DEFAULT_MAX_TRIANGLES<tt>. 
+#
+# Note that splitting is generally a time-consuming task, but only if there's
+# something to split. The use of this step is recommended for most users.
+#
+aiProcess_SplitLargeMeshes = 0x80
+
+## <hr>Removes the node graph and pre-transforms all vertices with
+# the local transformation matrices of their nodes.
+#
+# The output scene still contains nodes, however there is only a
+# root node with children, each one referencing only one mesh,
+# and each mesh referencing one material. For rendering, you can
+# simply render all meshes in order - you don't need to pay
+# attention to local transformations and the node hierarchy.
+# Animations are removed during this step.
+# This step is intended for applications without a scenegraph.
+# The step CAN cause some problems: if e.g. a mesh of the asset
+# contains normals and another, using the same material index, does not, 
+# they will be brought together, but the first meshes's part of
+# the normal list is zeroed. However, these artifacts are rare.
+# @note The <tt>#AI_CONFIG_PP_PTV_NORMALIZE<tt> configuration property
+# can be set to normalize the scene's spatial dimension to the -1...1
+# range. 
+#
+aiProcess_PreTransformVertices = 0x100
+
+## <hr>Limits the number of bones simultaneously affecting a single vertex
+#  to a maximum value.
+#
+# If any vertex is affected by more than the maximum number of bones, the least 
+# important vertex weights are removed and the remaining vertex weights are
+# renormalized so that the weights still sum up to 1.
+# The default bone weight limit is 4 (defined as <tt>#AI_LMW_MAX_WEIGHTS<tt> in
+# config.h), but you can use the <tt>#AI_CONFIG_PP_LBW_MAX_WEIGHTS<tt> setting to
+# supply your own limit to the post processing step.
+#
+# If you intend to perform the skinning in hardware, this post processing 
+# step might be of interest to you.
+#
+aiProcess_LimitBoneWeights = 0x200
+
+## <hr>Validates the imported scene data structure.
+# This makes sure that all indices are valid, all animations and
+# bones are linked correctly, all material references are correct .. etc.
+#
+# It is recommended that you capture Assimp's log output if you use this flag,
+# so you can easily find out what's wrong if a file fails the
+# validation. The validator is quite strict and will find #all#
+# inconsistencies in the data structure... It is recommended that plugin 
+# developers use it to debug their loaders. There are two types of
+# validation failures:
+# <ul>
+# <li>Error: There's something wrong with the imported data. Further
+#   postprocessing is not possible and the data is not usable at all.
+#   The import fails. #Importer::GetErrorString() or #aiGetErrorString()
+#   carry the error message around.<li>
+# <li>Warning: There are some minor issues (e.g. 1000000 animation 
+#   keyframes with the same time), but further postprocessing and use
+#   of the data structure is still safe. Warning details are written
+#   to the log file, <tt>#AI_SCENE_FLAGS_VALIDATION_WARNING<tt> is set
+#   in #aiScene::mFlags<li>
+# <ul>
+#
+# This post-processing step is not time-consuming. Its use is not
+# compulsory, but recommended. 
+#
+aiProcess_ValidateDataStructure = 0x400
+
+## <hr>Reorders triangles for better vertex cache locality.
+#
+# The step tries to improve the ACMR (average post-transform vertex cache
+# miss ratio) for all meshes. The implementation runs in O(n) and is 
+# roughly based on the 'tipsify' algorithm (see <a href="
+# http:www.cs.princeton.edugfxpubsSander_2007_%3ETRtipsy.pdf">this
+# paper<a>).
+#
+# If you intend to render huge models in hardware, this step might
+# be of interest to you. The <tt>#AI_CONFIG_PP_ICL_PTCACHE_SIZE<tt>config
+# setting can be used to fine-tune the cache optimization.
+#
+aiProcess_ImproveCacheLocality = 0x800
+
+## <hr>Searches for redundantunreferenced materials and removes them.
+#
+# This is especially useful in combination with the 
+# #aiProcess_PretransformVertices and #aiProcess_OptimizeMeshes flags. 
+# Both join small meshes with equal characteristics, but they can't do 
+# their work if two meshes have different materials. Because several
+# material settings are lost during Assimp's import filters,
+# (and because many exporters don't check for redundant materials), huge
+# models often have materials which are are defined several times with
+# exactly the same settings.
+#
+# Several material settings not contributing to the final appearance of
+# a surface are ignored in all comparisons (e.g. the material name).
+# So, if you're passing additional information through the
+# content pipeline (probably using #magic# material names), don't 
+# specify this flag. Alternatively take a look at the
+# <tt>#AI_CONFIG_PP_RRM_EXCLUDE_LIST<tt> setting.
+# 
+aiProcess_RemoveRedundantMaterials = 0x1000
+
+## <hr>This step tries to determine which meshes have normal vectors 
+# that are facing inwards and inverts them.
+#
+# The algorithm is simple but effective:
+# the bounding box of all vertices + their normals is compared against
+# the volume of the bounding box of all vertices without their normals.
+# This works well for most objects, problems might occur with planar
+# surfaces. However, the step tries to filter such cases.
+# The step inverts all in-facing normals. Generally it is recommended
+# to enable this step, although the result is not always correct.
+#
+aiProcess_FixInfacingNormals = 0x2000
+
+## <hr>This step splits meshes with more than one primitive type in 
+#  homogeneous sub-meshes. 
+#
+#  The step is executed after the triangulation step. After the step
+#  returns, just one bit is set in aiMesh::mPrimitiveTypes. This is 
+#  especially useful for real-time rendering where point and line
+#  primitives are often ignored or rendered separately.
+#  You can use the <tt>#AI_CONFIG_PP_SBP_REMOVE<tt> option to specify which
+#  primitive types you need. This can be used to easily exclude
+#  lines and points, which are rarely used, from the import.
+#
+aiProcess_SortByPType = 0x8000
+
+## <hr>This step searches all meshes for degenerate primitives and
+#  converts them to proper lines or points.
+#
+# A face is 'degenerate' if one or more of its points are identical.
+# To have the degenerate stuff not only detected and collapsed but
+# removed, try one of the following procedures:
+# <br><b>1.<b> (if you support lines and points for rendering but don't
+#    want the degenerates)<br>
+# <ul>
+#   <li>Specify the #aiProcess_FindDegenerates flag.
+#   <li>
+#   <li>Set the <tt>AI_CONFIG_PP_FD_REMOVE<tt> option to 1. This will 
+#       cause the step to remove degenerate triangles from the import
+#       as soon as they're detected. They won't pass any further
+#       pipeline steps.
+#   <li>
+# <ul>
+# <br><b>2.<b>(if you don't support lines and points at all)<br>
+# <ul>
+#   <li>Specify the #aiProcess_FindDegenerates flag.
+#   <li>
+#   <li>Specify the #aiProcess_SortByPType flag. This moves line and
+#     point primitives to separate meshes.
+#   <li>
+#   <li>Set the <tt>AI_CONFIG_PP_SBP_REMOVE<tt> option to 
+#       @code aiPrimitiveType_POINTS | aiPrimitiveType_LINES
+#       @endcode to cause SortByPType to reject point
+#       and line meshes from the scene.
+#   <li>
+# <ul>
+# @note Degenerate polygons are not necessarily evil and that's why
+# they're not removed by default. There are several file formats which 
+# don't support lines or points, and some exporters bypass the
+# format specification and write them as degenerate triangles instead.
+#
+aiProcess_FindDegenerates = 0x10000
+
+## <hr>This step searches all meshes for invalid data, such as zeroed
+#  normal vectors or invalid UV coords and removesfixes them. This is
+#  intended to get rid of some common exporter errors.
+#
+# This is especially useful for normals. If they are invalid, and
+# the step recognizes this, they will be removed and can later
+# be recomputed, i.e. by the #aiProcess_GenSmoothNormals flag.<br>
+# The step will also remove meshes that are infinitely small and reduce
+# animation tracks consisting of hundreds if redundant keys to a single
+# key. The <tt>AI_CONFIG_PP_FID_ANIM_ACCURACY<tt> config property decides
+# the accuracy of the check for duplicate animation tracks.
+#
+aiProcess_FindInvalidData = 0x20000
+
+## <hr>This step converts non-UV mappings (such as spherical or
+#  cylindrical mapping) to proper texture coordinate channels.
+#
+# Most applications will support UV mapping only, so you will
+# probably want to specify this step in every case. Note that Assimp is not
+# always able to match the original mapping implementation of the 
+# 3D app which produced a model perfectly. It's always better to let the
+# modelling app compute the UV channels - 3ds max, Maya, Blender, 
+# LightWave, and Modo do this for example.
+#
+# @note If this step is not requested, you'll need to process the
+# <tt>#AI_MATKEY_MAPPING<tt> material property in order to display all assets
+# properly.
+#
+aiProcess_GenUVCoords = 0x40000
+
+## <hr>This step applies per-texture UV transformations and bakes
+#  them into stand-alone vtexture coordinate channels.
+#  
+# UV transformations are specified per-texture - see the 
+# <tt>#AI_MATKEY_UVTRANSFORM<tt> material key for more information. 
+# This step processes all textures with 
+# transformed input UV coordinates and generates a new (pre-transformed) UV channel 
+# which replaces the old channel. Most applications won't support UV 
+# transformations, so you will probably want to specify this step.
+#
+# @note UV transformations are usually implemented in real-time apps by 
+# transforming texture coordinates at vertex shader stage with a 3x3
+# (homogenous) transformation matrix.
+#
+aiProcess_TransformUVCoords = 0x80000
+
+## <hr>This step searches for duplicate meshes and replaces them
+#  with references to the first mesh.
+#
+#  This step takes a while, so don't use it if speed is a concern.
+#  Its main purpose is to workaround the fact that many export
+#  file formats don't support instanced meshes, so exporters need to
+#  duplicate meshes. This step removes the duplicates again. Please 
+#  note that Assimp does not currently support per-node material
+#  assignment to meshes, which means that identical meshes with
+#  different materials are currently #not# joined, although this is 
+#  planned for future versions.
+#
+aiProcess_FindInstances = 0x100000
+
+## <hr>A postprocessing step to reduce the number of meshes.
+#
+#  This will, in fact, reduce the number of draw calls.
+#
+#  This is a very effective optimization and is recommended to be used
+#  together with #aiProcess_OptimizeGraph, if possible. The flag is fully
+#  compatible with both #aiProcess_SplitLargeMeshes and #aiProcess_SortByPType.
+#
+aiProcess_OptimizeMeshes  = 0x200000
+
+
+## <hr>A postprocessing step to optimize the scene hierarchy. 
+#
+#  Nodes without animations, bones, lights or cameras assigned are 
+#  collapsed and joined.
+#
+#  Node names can be lost during this step. If you use special 'tag nodes'
+#  to pass additional information through your content pipeline, use the
+#  <tt>#AI_CONFIG_PP_OG_EXCLUDE_LIST<tt> setting to specify a list of node 
+#  names you want to be kept. Nodes matching one of the names in this list won't
+#  be touched or modified.
+#
+#  Use this flag with caution. Most simple files will be collapsed to a 
+#  single node, so complex hierarchies are usually completely lost. This is not
+#  useful for editor environments, but probably a very effective
+#  optimization if you just want to get the model data, convert it to your
+#  own format, and render it as fast as possible. 
+#
+#  This flag is designed to be used with #aiProcess_OptimizeMeshes for best
+#  results.
+#
+#  @note 'Crappy' scenes with thousands of extremely small meshes packed
+#  in deeply nested nodes exist for almost all file formats.
+#  #aiProcess_OptimizeMeshes in combination with #aiProcess_OptimizeGraph 
+#  usually fixes them all and makes them renderable. 
+#
+aiProcess_OptimizeGraph  = 0x400000
+
+## <hr>This step flips all UV coordinates along the y-axis and adjusts
+# material settings and bitangents accordingly.
+#
+# <b>Output UV coordinate system:<b>
+# @code
+# 0y|0y ---------- 1x|0y 
+# |                 |
+# |                 |
+# |                 |
+# 0x|1y ---------- 1x|1y
+# @endcode
+#
+# You'll probably want to consider this flag if you use Direct3D for
+# rendering. The #aiProcess_ConvertToLeftHanded flag supersedes this
+# setting and bundles all conversions typically required for D3D-based
+# applications.
+#
+aiProcess_FlipUVs = 0x800000
+
+## <hr>This step adjusts the output face winding order to be CW.
+#
+# The default face winding order is counter clockwise (CCW).
+#
+# <b>Output face order:<b>
+# @code
+#       x2
+#           
+#                         x0
+#  x1
+# @endcode
+#
+aiProcess_FlipWindingOrder  = 0x1000000
+
+## <hr>This step splits meshes with many bones into sub-meshes so that each
+# su-bmesh has fewer or as many bones as a given limit. 
+#
+aiProcess_SplitByBoneCount  = 0x2000000
+
+## <hr>This step removes bones losslessly or according to some threshold.
+#
+#  In some cases (i.e. formats that require it) exporters are forced to
+#  assign dummy bone weights to otherwise static meshes assigned to
+#  animated meshes. Full, weight-based skinning is expensive while
+#  animating nodes is extremely cheap, so this step is offered to clean up
+#  the data in that regard. 
+#                                                              
+#  Use <tt>#AI_CONFIG_PP_DB_THRESHOLD<tt> to control this. 
+#  Use <tt>#AI_CONFIG_PP_DB_ALL_OR_NONE<tt> if you want bones removed if and 
+#  only if all bones within the scene qualify for removal.
+#
+aiProcess_Debone  = 0x4000000
+
+aiProcess_GenEntityMeshes = 0x100000
+aiProcess_OptimizeAnimations = 0x200000
+aiProcess_FixTexturePaths = 0x200000
+
+## @def aiProcess_ConvertToLeftHanded
+ #  @brief Shortcut flag for Direct3D-based applications. 
+ #
+ #  Supersedes the #aiProcess_MakeLeftHanded and #aiProcess_FlipUVs and
+ #  #aiProcess_FlipWindingOrder flags.
+ #  The output data matches Direct3D's conventions: left-handed geometry, upper-left
+ #  origin for UV coordinates and finally clockwise face order, suitable for CCW culling.
+ #
+ #  @deprecated 
+ #
+aiProcess_ConvertToLeftHanded = ( \
+    aiProcess_MakeLeftHanded     | \
+    aiProcess_FlipUVs            | \
+    aiProcess_FlipWindingOrder   | \
+    0 ) 
+
+
+## @def aiProcessPreset_TargetRealtimeUse_Fast
+ #  @brief Default postprocess configuration optimizing the data for real-time rendering.
+ #  
+ #  Applications would want to use this preset to load models on end-user PCs,
+ #  maybe for direct use in game.
+ #
+ # If you're using DirectX, don't forget to combine this value with
+ # the #aiProcess_ConvertToLeftHanded step. If you don't support UV transformations
+ # in your application apply the #aiProcess_TransformUVCoords step, too.
+ #  @note Please take the time to read the docs for the steps enabled by this preset. 
+ #  Some of them offer further configurable properties, while some of them might not be of
+ #  use for you so it might be better to not specify them.
+ #
+aiProcessPreset_TargetRealtime_Fast = ( \
+    aiProcess_CalcTangentSpace      |  \
+    aiProcess_GenNormals            |  \
+    aiProcess_JoinIdenticalVertices |  \
+    aiProcess_Triangulate           |  \
+    aiProcess_GenUVCoords           |  \
+    aiProcess_SortByPType           |  \
+    0 )
+
+ ## @def aiProcessPreset_TargetRealtime_Quality
+  #  @brief Default postprocess configuration optimizing the data for real-time rendering.
+  #
+  #  Unlike #aiProcessPreset_TargetRealtime_Fast, this configuration
+  #  performs some extra optimizations to improve rendering speed and
+  #  to minimize memory usage. It could be a good choice for a level editor
+  #  environment where import speed is not so important.
+  #  
+  #  If you're using DirectX, don't forget to combine this value with
+  #  the #aiProcess_ConvertToLeftHanded step. If you don't support UV transformations
+  #  in your application apply the #aiProcess_TransformUVCoords step, too.
+  #  @note Please take the time to read the docs for the steps enabled by this preset. 
+  #  Some of them offer further configurable properties, while some of them might not be
+  #  of use for you so it might be better to not specify them.
+  #
+aiProcessPreset_TargetRealtime_Quality = ( \
+    aiProcess_CalcTangentSpace              |  \
+    aiProcess_GenSmoothNormals              |  \
+    aiProcess_JoinIdenticalVertices         |  \
+    aiProcess_ImproveCacheLocality          |  \
+    aiProcess_LimitBoneWeights              |  \
+    aiProcess_RemoveRedundantMaterials      |  \
+    aiProcess_SplitLargeMeshes              |  \
+    aiProcess_Triangulate                   |  \
+    aiProcess_GenUVCoords                   |  \
+    aiProcess_SortByPType                   |  \
+    aiProcess_FindDegenerates               |  \
+    aiProcess_FindInvalidData               |  \
+    0 )
+
+ ## @def aiProcessPreset_TargetRealtime_MaxQuality
+  #  @brief Default postprocess configuration optimizing the data for real-time rendering.
+  #
+  #  This preset enables almost every optimization step to achieve perfectly
+  #  optimized data. It's your choice for level editor environments where import speed 
+  #  is not important.
+  #  
+  #  If you're using DirectX, don't forget to combine this value with
+  #  the #aiProcess_ConvertToLeftHanded step. If you don't support UV transformations
+  #  in your application, apply the #aiProcess_TransformUVCoords step, too.
+  #  @note Please take the time to read the docs for the steps enabled by this preset. 
+  #  Some of them offer further configurable properties, while some of them might not be
+  #  of use for you so it might be better to not specify them.
+  #
+aiProcessPreset_TargetRealtime_MaxQuality = ( \
+    aiProcessPreset_TargetRealtime_Quality   |  \
+    aiProcess_FindInstances                  |  \
+    aiProcess_ValidateDataStructure          |  \
+    aiProcess_OptimizeMeshes                 |  \
+    0 )
+
+
diff --git a/port/PyAssimp/scripts/opengl_viewer.py b/port/PyAssimp/scripts/opengl_viewer.py
new file mode 100755
index 000000000..2cfc4748c
--- /dev/null
+++ b/port/PyAssimp/scripts/opengl_viewer.py
@@ -0,0 +1,421 @@
+#!/usr/bin/env python
+#-*- coding: UTF-8 -*-
+
+""" This program demonstrate the use of pyassimp to render
+objects in OpenGL.
+
+It loads a 3D model with ASSIMP and display it.
+
+Materials are supported but textures are currently ignored.
+
+Half-working keyboard + mouse navigation is supported.
+
+This sample is based on several sources, including:
+ - http://www.lighthouse3d.com/tutorials
+ - http://www.songho.ca/opengl/gl_transform.html
+ - http://code.activestate.com/recipes/325391/
+ - ASSIMP's C++ SimpleOpenGL viewer
+"""
+
+import os, sys
+from OpenGL.GLUT import *
+from OpenGL.GLU import *
+from OpenGL.GL import *
+from OpenGL.arrays import ArrayDatatype
+
+import logging;logger = logging.getLogger("assimp_opengl")
+logging.basicConfig(level=logging.INFO)
+
+import math
+import numpy
+
+from pyassimp import core as pyassimp
+from pyassimp.postprocess import *
+from pyassimp.helper import *
+
+
+name = 'pyassimp OpenGL viewer'
+height = 600
+width = 900
+
+class GLRenderer():
+    def __init__(self):
+        self.scene = None
+
+        self.drot = 0.0
+        self.dp = 0.0
+
+        self.angle = 0.0
+        self.x = 1.0
+        self.z = 3.0
+        self.lx = 0.0
+        self.lz = 0.0
+        self.using_fixed_cam = False
+        self.current_cam_index = 0
+
+        self.x_origin = -1 # x position of the mouse when pressing left btn
+
+        # for FPS calculation
+        self.prev_time = 0
+        self.prev_fps_time = 0
+        self.frames = 0
+
+    def prepare_gl_buffers(self, mesh):
+
+        mesh.gl = {}
+
+        # Fill the buffer for vertex positions
+        mesh.gl["vertices"] = glGenBuffers(1)
+        glBindBuffer(GL_ARRAY_BUFFER, mesh.gl["vertices"])
+        glBufferData(GL_ARRAY_BUFFER, 
+                    mesh.vertices,
+                    GL_STATIC_DRAW)
+
+        # Fill the buffer for normals
+        mesh.gl["normals"] = glGenBuffers(1)
+        glBindBuffer(GL_ARRAY_BUFFER, mesh.gl["normals"])
+        glBufferData(GL_ARRAY_BUFFER, 
+                    mesh.normals,
+                    GL_STATIC_DRAW)
+
+
+        # Fill the buffer for vertex positions
+        mesh.gl["triangles"] = glGenBuffers(1)
+        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mesh.gl["triangles"])
+        glBufferData(GL_ELEMENT_ARRAY_BUFFER, 
+                    mesh.faces,
+                    GL_STATIC_DRAW)
+
+        # Unbind buffers
+        glBindBuffer(GL_ARRAY_BUFFER,0)
+        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,0)
+
+    
+    def load_dae(self, path, postprocess = None):
+        logger.info("Loading model:" + path + "...")
+
+        if postprocess:
+            self.scene = pyassimp.load(path, postprocess)
+        else:
+            self.scene = pyassimp.load(path)
+        logger.info("Done.")
+
+        scene = self.scene
+        #log some statistics
+        logger.info("  meshes: %d" % len(scene.meshes))
+        logger.info("  total faces: %d" % sum([len(mesh.faces) for mesh in scene.meshes]))
+        logger.info("  materials: %d" % len(scene.materials))
+        self.bb_min, self.bb_max = get_bounding_box(self.scene)
+        logger.info("  bounding box:" + str(self.bb_min) + " - " + str(self.bb_max))
+
+        self.scene_center = [(a + b) / 2. for a, b in zip(self.bb_min, self.bb_max)]
+
+        for index, mesh in enumerate(scene.meshes):
+            self.prepare_gl_buffers(mesh)
+
+        # Finally release the model
+        pyassimp.release(scene)
+
+    def cycle_cameras(self):
+        self.current_cam_index
+        if not self.scene.cameras:
+            return None
+        self.current_cam_index = (self.current_cam_index + 1) % len(self.scene.cameras)
+        cam = self.scene.cameras[self.current_cam_index]
+        logger.info("Switched to camera " + str(cam))
+        return cam
+
+    def set_default_camera(self):
+
+        if not self.using_fixed_cam:
+            glLoadIdentity()
+            gluLookAt(self.x ,1., self.z, # pos
+                    self.x + self.lx - 1.0, 1., self.z + self.lz - 3.0, # look at
+                    0.,1.,0.) # up vector
+
+
+    def set_camera(self, camera):
+
+        if not camera:
+            return
+
+        self.using_fixed_cam = True
+
+        znear = camera.clipplanenear
+        zfar = camera.clipplanefar
+        aspect = camera.aspect
+        fov = camera.horizontalfov
+
+        glMatrixMode(GL_PROJECTION)
+        glLoadIdentity()
+
+        # Compute gl frustrum
+        tangent = math.tan(fov/2.)
+        h = znear * tangent
+        w = h * aspect
+
+        # params: left, right, bottom, top, near, far
+        glFrustum(-w, w, -h, h, znear, zfar)
+        # equivalent to:
+        #gluPerspective(fov * 180/math.pi, aspect, znear, zfar)
+
+        glMatrixMode(GL_MODELVIEW)
+        glLoadIdentity()
+
+        cam = transform(camera.position, camera.transformation)
+        at = transform(camera.lookat, camera.transformation)
+        gluLookAt(cam[0], cam[2], -cam[1],
+                   at[0],  at[2],  -at[1],
+                       0,      1,       0)
+
+    def fit_scene(self, restore = False):
+        """ Compute a scale factor and a translation to fit and center 
+        the whole geometry on the screen.
+        """
+
+        x_max = self.bb_max[0] - self.bb_min[0]
+        y_max = self.bb_max[1] - self.bb_min[1]
+        tmp = max(x_max, y_max)
+        z_max = self.bb_max[2] - self.bb_min[2]
+        tmp = max(z_max, tmp)
+        
+        if not restore:
+            tmp = 1. / tmp
+
+        logger.info("Scaling the scene by %.03f" % tmp)
+        glScalef(tmp, tmp, tmp)
+    
+        # center the model
+        direction = -1 if not restore else 1
+        glTranslatef( direction * self.scene_center[0], 
+                      direction * self.scene_center[1], 
+                      direction * self.scene_center[2] )
+
+        return x_max, y_max, z_max
+ 
+    def apply_material(self, mat):
+        """ Apply an OpenGL, using one OpenGL list per material to cache 
+        the operation.
+        """
+
+        if not hasattr(mat, "gl_mat"): # evaluate once the mat properties, and cache the values in a glDisplayList.
+    
+            diffuse = mat.properties.get("$clr.diffuse", numpy.array([0.8, 0.8, 0.8, 1.0]))
+            specular = mat.properties.get("$clr.specular", numpy.array([0., 0., 0., 1.0]))
+            ambient = mat.properties.get("$clr.ambient", numpy.array([0.2, 0.2, 0.2, 1.0]))
+            emissive = mat.properties.get("$clr.emissive", numpy.array([0., 0., 0., 1.0]))
+            shininess = min(mat.properties.get("$mat.shininess", 1.0), 128)
+            wireframe = mat.properties.get("$mat.wireframe", 0)
+            twosided = mat.properties.get("$mat.twosided", 1)
+    
+            from OpenGL.raw import GL
+            setattr(mat, "gl_mat", GL.GLuint(0))
+            mat.gl_mat = glGenLists(1)
+            glNewList(mat.gl_mat, GL_COMPILE)
+    
+            glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, diffuse)
+            glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, specular)
+            glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, ambient)
+            glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, emissive)
+            glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, shininess)
+            glPolygonMode(GL_FRONT_AND_BACK, GL_LINE if wireframe else GL_FILL)
+            glDisable(GL_CULL_FACE) if twosided else glEnable(GL_CULL_FACE)
+    
+            glEndList()
+    
+        glCallList(mat.gl_mat)
+
+    
+   
+    def do_motion(self):
+
+        gl_time = glutGet(GLUT_ELAPSED_TIME)
+
+        # Compute the new position of the camera and set it
+        self.x += self.dp * self.lx * 0.01 * (gl_time-self.prev_time)
+        self.z += self.dp * self.lz * 0.01 * (gl_time-self.prev_time)
+        self.angle += self.drot * 0.1 *  (gl_time-self.prev_time)
+        self.lx = math.sin(self.angle)
+        self.lz = -math.cos(self.angle)
+        self.set_default_camera()
+
+        self.prev_time = gl_time
+
+        # Compute FPS
+        self.frames += 1
+        if gl_time - self.prev_fps_time >= 1000:
+            current_fps = self.frames * 1000 / (gl_time - self.prev_fps_time)
+            logger.info('%.0f fps' % current_fps)
+            self.frames = 0
+            self.prev_fps_time = gl_time
+
+        glutPostRedisplay()
+
+    def recursive_render(self, node):
+        """ Main recursive rendering method.
+        """
+
+        # save model matrix and apply node transformation
+        glPushMatrix()
+        m = node.transformation.transpose() # OpenGL row major
+        glMultMatrixf(m)
+
+        for mesh in node.meshes:
+            self.apply_material(mesh.material)
+
+            glBindBuffer(GL_ARRAY_BUFFER, mesh.gl["vertices"])
+            glEnableClientState(GL_VERTEX_ARRAY)
+            glVertexPointer(3, GL_FLOAT, 0, None)
+
+            glBindBuffer(GL_ARRAY_BUFFER, mesh.gl["normals"])
+            glEnableClientState(GL_NORMAL_ARRAY)
+            glNormalPointer(GL_FLOAT, 0, None)
+
+            glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mesh.gl["triangles"])
+            glDrawElements(GL_TRIANGLES,len(mesh.faces) * 3, GL_UNSIGNED_INT, None)
+
+            glDisableClientState(GL_VERTEX_ARRAY)
+            glDisableClientState(GL_NORMAL_ARRAY)
+
+            glBindBuffer(GL_ARRAY_BUFFER, 0)
+            glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0)
+
+        for child in node.children:
+            self.recursive_render(child)
+
+        glPopMatrix()
+
+
+    def display(self):
+        """ GLUT callback to redraw OpenGL surface
+        """
+        glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT)
+    
+        self.recursive_render(self.scene.rootnode)
+    
+        glutSwapBuffers()
+        self.do_motion()
+        return
+
+    ####################################################################
+    ##               GLUT keyboard and mouse callbacks                ##
+    ####################################################################
+    def onkeypress(self, key, x, y):
+        if key == 'c':
+            self.fit_scene(restore = True)
+            self.set_camera(self.cycle_cameras())
+        if key == 'q':
+            sys.exit(0)
+
+    def onspecialkeypress(self, key, x, y):
+
+        fraction = 0.05
+
+        if key == GLUT_KEY_UP:
+            self.dp = 0.5
+        if key == GLUT_KEY_DOWN:
+            self.dp = -0.5
+        if key == GLUT_KEY_LEFT:
+            self.drot = -0.01
+        if key == GLUT_KEY_RIGHT:
+            self.drot = 0.01
+
+    def onspecialkeyrelease(self, key, x, y):
+
+        if key == GLUT_KEY_UP:
+            self.dp = 0.
+        if key == GLUT_KEY_DOWN:
+            self.dp = 0.
+        if key == GLUT_KEY_LEFT:
+            self.drot = 0.0
+        if key == GLUT_KEY_RIGHT:
+            self.drot = 0.0
+
+    def onclick(self, button, state, x, y):
+        if button == GLUT_LEFT_BUTTON:
+            if state == GLUT_UP:
+                self.drot = 0
+                self.x_origin = -1
+            else: # GLUT_DOWN
+                self.x_origin = x
+
+    def onmousemove(self, x, y):
+        if self.x_origin >= 0:
+            self.drot = (x - self.x_origin) * 0.001
+
+    def render(self, filename=None, fullscreen = False, autofit = True, postprocess = None):
+        """
+
+        :param autofit: if true, scale the scene to fit the whole geometry
+        in the viewport.
+        """
+    
+        # First initialize the openGL context
+        glutInit(sys.argv)
+        glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH)
+        if not fullscreen:
+            glutInitWindowSize(width, height)
+            glutCreateWindow(name)
+        else:
+            glutGameModeString("1024x768")
+            if glutGameModeGet(GLUT_GAME_MODE_POSSIBLE):
+                glutEnterGameMode()
+            else:
+                print("Fullscreen mode not available!")
+                sys.exit(1)
+
+        self.load_dae(filename, postprocess = postprocess)
+
+        glClearColor(0.1,0.1,0.1,1.)
+        #glShadeModel(GL_SMOOTH)
+
+        glEnable(GL_LIGHTING)
+
+        glEnable(GL_CULL_FACE)
+        glEnable(GL_DEPTH_TEST)
+
+        #lightZeroPosition = [10.,4.,10.,1.]
+        #lightZeroColor = [0.8,1.0,0.8,1.0] #green tinged
+        #glLightfv(GL_LIGHT0, GL_POSITION, lightZeroPosition)
+        #glLightfv(GL_LIGHT0, GL_DIFFUSE, lightZeroColor)
+        #glLightf(GL_LIGHT0, GL_CONSTANT_ATTENUATION, 0.1)
+        #glLightf(GL_LIGHT0, GL_LINEAR_ATTENUATION, 0.05)
+        glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE)
+        glEnable(GL_NORMALIZE)
+        glEnable(GL_LIGHT0)
+    
+        glutDisplayFunc(self.display)
+
+
+        glMatrixMode(GL_PROJECTION)
+        glLoadIdentity()
+        gluPerspective(35.0, width/float(height) , 0.10, 100.0)
+        glMatrixMode(GL_MODELVIEW)
+        self.set_default_camera()
+
+        if autofit:
+            # scale the whole asset to fit into our view frustum·
+            self.fit_scene()
+
+        glPushMatrix()
+
+        # Register GLUT callbacks for keyboard and mouse
+        glutKeyboardFunc(self.onkeypress)
+        glutSpecialFunc(self.onspecialkeypress)
+        glutIgnoreKeyRepeat(1)
+        glutSpecialUpFunc(self.onspecialkeyrelease)
+
+        glutMouseFunc(self.onclick)
+        glutMotionFunc(self.onmousemove)
+
+        glutMainLoop()
+
+
+if __name__ == '__main__':
+    if not len(sys.argv) > 1:
+        print("Usage: " + __file__ + " <model>")
+        sys.exit(0)
+
+    glrender = GLRenderer()
+    glrender.render(sys.argv[1], fullscreen = False, postprocess = aiProcessPreset_TargetRealtime_MaxQuality)
+
diff --git a/port/PyAssimp/scripts/quicktest.py b/port/PyAssimp/scripts/quicktest.py
new file mode 100755
index 000000000..e01a49fa5
--- /dev/null
+++ b/port/PyAssimp/scripts/quicktest.py
@@ -0,0 +1,45 @@
+#!/usr/bin/env python
+#-*- coding: UTF-8 -*-
+
+"""
+This module uses the sample.py script to load all test models it finds.
+
+Note: this is not an exhaustive test suite, it does not check the
+data structures in detail. It just verifies whether basic
+loading and querying of 3d models using pyassimp works.
+"""
+
+
+import sys,os
+import sample
+from pyassimp import pyassimp,errors
+
+# paths to be walkd recursively
+basepaths = [os.path.join('..','..','test','models'), os.path.join('..','..','test','models-nonbsd')]
+
+# file extensions to be considered
+extensions = ['.3ds','.x','.lwo','.obj','.md5mesh','.dxf','.ply','.stl','.dae','.md5anim','.lws','.irrmesh','.nff','.off','.blend']
+
+def run_tests():
+	ok,err = 0,0
+	for path in basepaths:
+		for root, dirs, files in os.walk(path):
+			for afile in files:
+				base,ext = os.path.splitext(afile)	
+				if ext in extensions:		
+					try:
+						sample.main(os.path.join(root,afile))
+						ok += 1
+					except errors.AssimpError as error:
+						# assimp error is fine, this is a controlled case
+						print error
+						err += 1
+	print '** Loaded %s models, got controlled errors for %s files' % (ok,err)
+
+
+if __name__ == '__main__':
+	run_tests()
+
+
+
+
diff --git a/port/PyAssimp/scripts/sample.py b/port/PyAssimp/scripts/sample.py
new file mode 100755
index 000000000..b843b82ba
--- /dev/null
+++ b/port/PyAssimp/scripts/sample.py
@@ -0,0 +1,81 @@
+#!/usr/bin/env python
+#-*- coding: UTF-8 -*-
+
+"""
+This module demonstrates the functionality of PyAssimp.
+"""
+
+import os, sys
+import logging
+logging.basicConfig(level=logging.DEBUG)
+
+from pyassimp import core as pyassimp
+
+def recur_node(node,level = 0):
+    print("  " + "\t" * level + "- " + str(node))
+    for child in node.children:
+        recur_node(child, level + 1)
+
+
+def main(filename=None):
+
+    scene = pyassimp.load(filename)
+    
+    #the model we load
+    print("MODEL:" + filename)
+    print
+    
+    #write some statistics
+    print("SCENE:")
+    print("  meshes:" + str(len(scene.meshes)))
+    print("  materials:" + str(len(scene.materials)))
+    print("  textures:" + str(len(scene.textures)))
+    print
+    
+    print("NODES:")
+    recur_node(scene.rootnode)
+
+    print
+    print("MESHES:")
+    for index, mesh in enumerate(scene.meshes):
+        print("  MESH" + str(index+1))
+        print("    material id:" + str(mesh.materialindex+1))
+        print("    vertices:" + str(len(mesh.vertices)))
+        print("    first 3 verts:\n" + str(mesh.vertices[:3]))
+        if mesh.normals.any():
+                print("    first 3 normals:\n" + str(mesh.normals[:3]))
+        else:
+                print("    no normals")
+        print("    colors:" + str(len(mesh.colors)))
+        tcs = mesh.texturecoords
+        if tcs:
+            for index, tc in enumerate(tcs):
+                print("    texture-coords "+ str(index) + ":" + str(len(tcs[index])) + "first3:" + str(tcs[index][:3]))
+
+        else:
+            print("    no texture coordinates")
+        print("    uv-component-count:" + str(len(mesh.numuvcomponents)))
+        print("    faces:" + str(len(mesh.faces)) + " -> first:\n" + str(mesh.faces[:3]))
+        print("    bones:" + str(len(mesh.bones)) + " -> first:" + str([str(b) for b in mesh.bones[:3]]))
+        print
+
+    print("MATERIALS:")
+    for index, material in enumerate(scene.materials):
+        print("  MATERIAL (id:" + str(index+1) + ")")
+        for key, value in material.properties.items():
+            print("    %s: %s" % (key, value))
+    print
+    
+    print("TEXTURES:")
+    for index, texture in enumerate(scene.textures):
+        print("  TEXTURE" + str(index+1))
+        print("    width:" + str(texture.width))
+        print("    height:" + str(texture.height))
+        print("    hint:" + str(texture.achformathint))
+        print("    data (size):" + str(len(texture.data)))
+   
+    # Finally release the model
+    pyassimp.release(scene)
+
+if __name__ == "__main__":
+    main(sys.argv[1] if len(sys.argv)>1 else None)
diff --git a/port/PyAssimp/setup.py b/port/PyAssimp/setup.py
new file mode 100644
index 000000000..1d2242fbb
--- /dev/null
+++ b/port/PyAssimp/setup.py
@@ -0,0 +1,13 @@
+ # -*- coding: utf-8 -*-
+import os
+from distutils.core import setup
+
+setup(name='pyassimp',
+      version='0.1',
+      license='ISC',
+      description='Python bindings for the Open Asset Import Library (ASSIMP)',
+      url='http://assimp.sourceforge.net/',
+      packages=['pyassimp'],
+      data_files=[('share/pyassimp', ['README.md']),
+                  ('share/examples/pyassimp', ['scripts/' + f for f in os.listdir('scripts/')])]
+      )