import gc
import sys
import json
import os
import re
# set to True to enable the dummy composer which consumes less memory
# and should be faster
# Currently it generates invalid STEP file, so you should not use it
# unless you want to fix it
DUMMY_COMPOSER = False
if DUMMY_COMPOSER:
from part21_preparse import readStepFile, parse_entities
else:
os.environ["MMGT_OPT"] = "0"
from OCC.TDF import TDF_LabelSequence
from OCC.XSControl import XSControl_WorkSession
from OCC.STEPControl import STEPControl_AsIs
from OCC.STEPCAFControl import STEPCAFControl_Writer
from OCC.TopLoc import TopLoc_Location
from OCC.gp import gp_Trsf
from STP_converter_WebGL import set_label_name
from OCC.STEPCAFControl import STEPCAFControl_Reader
from OCC import XCAFApp, TDocStd , XCAFDoc
from OCC.TCollection import TCollection_ExtendedString
from classes import Product
class StepImporter(object):
def __init__(self, file_path):
self.h_doc = TDocStd.Handle_TDocStd_Document()
self.app = XCAFApp.GetApplication().GetObject()
self.app.NewDocument(TCollection_ExtendedString("MDTV-XCAF"), self.h_doc)
self.STEPReader = STEPCAFControl_Reader()
if not self.STEPReader.ReadFile(file_path.encode("utf-8")):
raise Exception("OpenCascade could not read STEP file")
self.STEPReader.Transfer(self.h_doc)
self.doc = self.h_doc.GetObject()
self.h_shape_tool = XCAFDoc.XCAFDoc_DocumentTool_ShapeTool(self.doc.Main())
self.h_colors_tool = XCAFDoc.XCAFDoc_DocumentTool_ColorTool(self.doc.Main())
self.shape_tool = self.h_shape_tool.GetObject()
self.color_tool = self.h_colors_tool.GetObject()
self.shapes = TDF_LabelSequence()
self.shape_tool.GetShapes(self.shapes)
roots = TDF_LabelSequence()
self.shape_tool.GetFreeShapes(roots)
ws = self.STEPReader.Reader().WS().GetObject()
model = ws.Model().GetObject()
model.Clear()
for i in range(1, 8):
ws.ClearData(i)
ws.ClearFile()
def __del__(self):
self.app.Close(self.h_doc)
del self.h_doc, self.app
[docs]def composer(temp_file_name):
"""
:param temp_file_name: path of a :class:`.tempfile` **.arb** that contains the information to generate a :class:`.Product` relative to the arborescense of a **.stp** file
For every node of the :class:`.Product` the attribute **doc_file_path** indicates where is store the file **.stp** that represents the node
"""
output = open(temp_file_name.encode(),"r")
product = Product.from_list(json.loads(output.read()))
output.close()
output = open(temp_file_name.encode(),"w+")# erase old data
output.close()
WS = XSControl_WorkSession()
my_step_importer = StepImporter(product.doc_path)
st = my_step_importer.shape_tool
lr = TDF_LabelSequence()
st.GetFreeShapes(lr)
add_labels(product, lr.Value(1), st)
writer = STEPCAFControl_Writer(WS.GetHandle(), False)
for i in range(lr.Length()):
writer.Transfer(lr.Value(i+1), STEPControl_AsIs)
writer.Write(temp_file_name)
def add_labels(product,lr,st):
if product.links:
for link in product.links:
if link.product.doc_id != product.doc_id:
if not link.product.label_reference:
lr_2 = TDF_LabelSequence()
si = StepImporter(link.product.doc_path)
shape_tool = si.shape_tool
shape_tool.GetFreeShapes(lr_2)
add_labels(link.product, lr_2.Value(1), shape_tool)
link.product.label_reference = lr_2.Value(1)
# FIXME: free memory
del si
gc.collect()
for d in range(link.quantity):
transformation = gp_Trsf()
loc = link.locations[d]
transformation.SetValues(loc.x1, loc.x2, loc.x3, loc.x4,
loc.y1, loc.y2, loc.y3, loc.y4,
loc.z1, loc.z2, loc.z3, loc.z4,
1, 1)
new_label = st.AddComponent(lr, link.product.label_reference,
TopLoc_Location(transformation))
set_label_name(new_label, link.names[d])
class Composer(object):
def __init__(self, product, output):
self.product = product
self.output = output
self.item_count = 0
self.max_id = 0
self.added_files = set()
self.occurences = []
self.line_completed = True
self.line_skipped = False
def compose(self):
self.init_step_file()
self.add_step_file(self.product)
self.add_occurences(self.product)
self.write_occurences()
self.close_step_file()
def init_step_file(self):
self.output.write("""ISO-10303-21;
HEADER;
FILE_DESCRIPTION(('Open CASCADE Model'),'2;1');
FILE_NAME('Open CASCADE Shape Model','2013-06-03T13:14:01',('Author'),(
'Open CASCADE'),'Open CASCADE STEP processor 6.3','Open CASCADE 6.3'
,'Unknown');
FILE_SCHEMA(('AUTOMOTIVE_DESIGN_CC2 { 1 2 10303 214 -1 1 5 4 }'));
ENDSEC;
DATA;
""")
def close_step_file(self):
self.output.write("ENDSEC;\nEND-ISO-10303-21;")
def increment_ids(self, line):
def inc(m):
val = int(m.group(1))
return "#%d" % (val + self.item_count)
new_line = re.sub(r"\#(\d+)", inc, line)
return new_line
def add_step_file(self, product):
path = product.doc_path
if path in self.added_files:
return
step = readStepFile(path)
max_id = max(step["insttype"].keys())
for iname, content in step["contents"].iteritems():
type_ = step["insttype"][iname]
if product != self.product and type_.startswith("APPLICATION"):
# there are certainly more lines to skip
continue
iname2 = iname + self.item_count
if type_ == "complex_type":
line = "#%d=(%s)\n" % (iname2, self.increment_ids(content))
else:
line = "#%d=%s(%s)\n" % (iname2, type_, self.increment_ids(content))
self.output.write(line)
if 'NEXT_ASSEMBLY_USAGE_OCCURRENCE' in step['typeinst']:
# find the root of an assembly
parents = set()
children = set()
for n in step['typeinst']['NEXT_ASSEMBLY_USAGE_OCCURRENCE']:
parent, child = [x.strip(" \n\r#'")
for x in step['contents'][n].split(',')[3:5]]
parents.add(int(parent))
children.add(int(child))
roots = parents / children
if len(roots) > 1:
raise ValueError("Too many roots in %s" % path)
root = roots.pop()
else:
# a single product
root = step['typeinst']['PRODUCT_DEFINITION'][0]
product.label_reference = self.item_count + root
del step
gc.collect()
self.item_count += max_id
self.added_files.add(path)
def add_occurences(self, product):
if product.links:
for link in product.links:
if link.product.doc_id!= product.doc_id:
if not link.product.label_reference:
self.add_step_file(link.product)
self.add_occurences(link.product)
for d in range(link.quantity):
self.occurences.append((product.label_reference, link.product.label_reference,
link.names[d], link.locations[d]))
def write_occurences(self):
for ref1, ref2, name, loc in self.occurences:
self.item_count += 1
e1 = self.item_count
self.item_count += 1
e2 = self.item_count
self.item_count += 1
e3 = self.item_count
self.item_count += 1
e4 = self.item_count
self.item_count += 1
e5 = self.item_count
self.item_count += 1
e6 = self.item_count
self.output.write("""#{e1} = CONTEXT_DEPENDENT_SHAPE_REPRESENTATION(#{e2},#{e4});
#{e2} = ( REPRESENTATION_RELATIONSHIP('','',#33,#10)
REPRESENTATION_RELATIONSHIP_WITH_TRANSFORMATION(#{e3})
SHAPE_REPRESENTATION_RELATIONSHIP() );
#{e3} = ITEM_DEFINED_TRANSFORMATION('','',#11,#15);
#{e4} = PRODUCT_DEFINITION_SHAPE('Placement','Placement of an item',#{e5}
);
#{e6} = NEXT_ASSEMBLY_USAGE_OCCURRENCE('1','{name}','',#{ref1},#{ref2},$);
""".format(**locals()))
# TODO: add locations and replaces #33, #10, #11, #15 entities
def dummy_compose(temp_file_name):
output = open(temp_file_name.encode(),"r")
product = Product.from_list(json.loads(output.read()))
output.close()
output = open(temp_file_name.encode(),"w+")# erase old data
output.close()
with open(temp_file_name, "w") as output:
c = Composer(product, output)
c.compose()
if __name__ == "__main__":
if DUMMY_COMPOSER:
dummy_compose(sys.argv[1])
else:
composer(sys.argv[1])
