6.3.5. document3D.STP_converter_WebGL — models for openPLM

Habla sobre los modelos

class openPLM.apps.document3D.STP_converter_WebGL.StepImporter(file_path, id=None)

Bases: object

Parameters:

• file_path – Path of the file .stp to analyzing
• id – For the generation of the Product, id is assigned like product.doc_id for every node of Product. For the generation of the files of geometry .geo, id , together with an index generated by the class, are used to identify the content of every file

Generates from a path of File .stp:

-A set of files .geo that represents the geometry of the different simple products that are useful to realize the visualization 3D across the web browser.

-A structure of information that represents the arborescencse of the different assemblies,represented in a Product . (Including his spatial location and orientation and his label of reference (OCC.TDF.TDF_Label))

This class is invoked from three different subprocesses related to the functionality of pythonOCC(generate3D.py , generateComposition.py , generateDecomposition.py).

compute_geometries(root_path, pov_dir)

Parameters:root_path – Path where to store the files .geo generated

When we generate a new StepImporter we will refill a list(shapes_simples) whit the SimpleShape contained in the file .stp

For each SimpleShape in the list shapes_simples:

We call the method write_geometries() to generate a file .geo representative of its geometry,the content of the file is identified by the index+1 (>0) of the position of the SimpleShape in the list of SimpleShapes and by the attribue id of StepImporter

Returns the list of the path of the generated .geo files

generate_product_arbre()

Generates a Product relative to the assemblies of the file .stp, for every node of the Product it includes a label (OCC.TDF.TDF_Label) that represents and identifies the node , openPLM can only work whit a single root .stp files

class openPLM.apps.document3D.STP_converter_WebGL.SimpleShape(name, TopoDS_Shape, color)

Class used to represent a simple shape geometry (not assembly)

Model attributes:  

name

Name of geometry

TopoDS_Shape

OCC.TopoDS.TopoDS_Shape that contains the geometry

color

OCC.Quantity.Quantity_Color that contains information about color of geometry

openPLM.apps.document3D.STP_converter_WebGL.expand_product(shape_tool, product, shapes_simples, deep, doc_id, product_root, product_id, file_path)

Parameters:

• shape_tool – OCC.XCAFDoc.XCAFDoc_ShapeTool
• product – Product that will be expanded
• shapes_simples – list of SimpleShape
• deep – Depth of the node that we explore
• doc_id – id that references a DocumentFile of which we are generating the Product
• product_root – Product root of the arborescense

We are going to expand a Product (product) from the OCC.TDF.TDF_Label who identifies it (product.label_reference)

If the product is an assembly:

• We generate the list of the OCC.TDF.TDF_Label that define it

• for each OCC.TDF.TDF_Label in list:

  • We generate a new document3D.classes.Link or if two or more OCC.TDF.TDF_Label of the list are partner, add an occurrence extra to the document3D.classes.Link that already was generated

  • The document3D.classes.Link is going to point at a new Product or, if the Product is already present in product_root, at the already definite product

  • If the document3D.classes.Link pointed at a new Product we need to expand it

    • The atribute label_reference of the new Product should be the OCC.TDF.TDF_Label
    • We expand the Product in a recursive call of method

Else the product is a simple shape:

• We look in the list of shapes_simples for his partner
• We set the attribute product.geometry like the index+1 (>0) of the position of his partner in the list of SimpleShape

openPLM.apps.document3D.STP_converter_WebGL.get_matrix(location)

Converts location in an array ([x1, x2, x3, x4, y1, y2, y3, y4, z1, z2, z3, z4])

x1	x2	x3	x4	x	=	x’
y1	y2	y3	y4	y	=	y’
z1	z2	z3	z4	z	=	z’
0	0	0	1	1	=	1

Parameters:location (OCC.TopLoc.TopLoc_Location) – location

openPLM.apps.document3D.STP_converter_WebGL.get_label_name(lab)

Returns the name of a OCC.TDF.TDF_Label (lab)

Parameters:lab – OCC.TDF.TDF_Label

openPLM.apps.document3D.STP_converter_WebGL.set_label_name(label, name)

Sets the name of a OCC.TDF.TDF_Label (label)

Parameters:

• label – OCC.TDF.TDF_Label
• name – new name for a OCC.TDF.TDF_Label

openPLM.apps.document3D.STP_converter_WebGL.find_color(label, color_tool, shape_tool)

Gets the color of a OCC.TDF.TDF_Label (label)

Parameters:

• label – OCC.TDF.TDF_Label
• shape_tool – OCC.XCAFDoc.XCAFDoc_ShapeTool
• color_tool – OCC.XCAFDoc.XCAFDoc_ColorTool