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Updated documentation

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This commit is contained in:
Jaime van Kessel 2015-08-11 16:01:12 +02:00
parent 102b2e7fa0
commit a47c8f7ef6
1 changed files with 14 additions and 9 deletions
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21
plugins/3MFReader/ThreeMFReader.py
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@ -18,6 +18,8 @@ from os import listdir
import untangle
import zipfile
## Base implementation for reading 3MF files. Has no support for textures. Only loads meshes!
class ThreeMFReader(MeshReader):
def __init__(self):
super(ThreeMFReader, self).__init__()
@ -28,11 +30,12 @@ class ThreeMFReader(MeshReader):
extension = os.path.splitext(file_name)[1]
if extension.lower() == self._supported_extension:
result = SceneNode()
# The base object of 3mf is a zipped archive.
archive = zipfile.ZipFile(file_name, 'r')
#print(archive.read("3D/3dmodel.model"))
try:
# The model is always stored in this place.
root = untangle.parse(archive.read("3D/3dmodel.model").decode("utf-8"))
for object in root.model.resources.object:
for object in root.model.resources.object: # There can be multiple objects, try to load all of them.
mesh = MeshData()
node = SceneNode()
vertex_list = []
@ -40,19 +43,22 @@ class ThreeMFReader(MeshReader):
vertex_list.append([vertex['x'],vertex['y'],vertex['z']])
mesh.reserveFaceCount(len(object.mesh.triangles.triangle))
for triangle in object.mesh.triangles.triangle:
v1 = int(triangle["v1"])
v2 = int(triangle["v2"])
v3 = int(triangle["v3"])
mesh.addFace(vertex_list[v1][0],vertex_list[v1][1],vertex_list[v1][2],vertex_list[v2][0],vertex_list[v2][1],vertex_list[v2][2],vertex_list[v3][0],vertex_list[v3][1],vertex_list[v3][2])
#TODO: We currently do not check for normals and simply recalculate them.
mesh.calculateNormals()
node.setMeshData(mesh)
node.setSelectable(True)
# Magical python comprehension; looks for the matching transformation
transformation = next((x for x in root.model.build.item if x["objectid"] == object["id"]), None)
if transformation["transform"]:
splitted_transformation = transformation["transform"].split()
## Transformation is saved as:
## M00 M01 M02 0.0
## M10 M11 M12 0.0
@ -60,18 +66,18 @@ class ThreeMFReader(MeshReader):
## M30 M31 M32 1.0
## We switch the row & cols as that is how everyone else uses matrices!
temp_mat = Matrix()
# Rotation & Scale
temp_mat._data[0,0] = splitted_transformation[0]
temp_mat._data[1,0] = splitted_transformation[1]
temp_mat._data[2,0] = splitted_transformation[2]
temp_mat._data[0,1] = splitted_transformation[3]
temp_mat._data[1,1] = splitted_transformation[4]
temp_mat._data[2,1] = splitted_transformation[5]
temp_mat._data[0,2] = splitted_transformation[6]
temp_mat._data[1,2] = splitted_transformation[7]
temp_mat._data[2,2] = splitted_transformation[8]
# Translation
temp_mat._data[0,3] = splitted_transformation[9]
temp_mat._data[1,3] = splitted_transformation[10]
temp_mat._data[2,3] = splitted_transformation[11]
@ -89,13 +95,12 @@ class ThreeMFReader(MeshReader):
scale_z = math.sqrt(S2.at(2,2))
node.setScale(Vector(scale_x,scale_y,scale_z))
# We use a different coordinate frame, so rotate.
rotation = Quaternion.fromAngleAxis(-0.5 * math.pi, Vector(1,0,0))
node.rotate(rotation)
result.addChild(node)
# If there is more then one object, group them.
# If there is more then one object, group them.
try:
if len(root.model.resources.object) > 1:
group_decorator = GroupDecorator()
@ -103,5 +108,5 @@ class ThreeMFReader(MeshReader):
except:
pass
except Exception as e:
print("EXCEPTION: " ,e)
Logger.log("e" ,"exception occured in 3mf reader: %s" , e)
return result