def import_as_one_shape(file):
shp = read_step_file(file)
tess = Tesselator(shp)
tess.Compute()
threejsString = tess.ExportShapeToThreejsJSONString('someid')
# with open("outputs/threejs/shape.json", "w") as f:
# f.write(threejsString)
return threejsString
def DisplayShape(self,
shape,
vertex_shader=None,
fragment_shader=None,
map_faces_to_mesh=False,
export_edges=False,
color=(0.65, 0.65, 0.65),
specular_color=(1, 1, 1),
shininess=0.9,
transparency=0.,
line_color=(0, 0., 0.),
line_width=2.,
mesh_quality=1.):
# create the shape hash
shape_uuid = uuid.uuid4().hex
shape_hash = "shp%s" % shape_uuid
# tesselate
tess = Tesselator(shape)
tess.Compute(compute_edges=export_edges, mesh_quality=mesh_quality)
#
sys.stdout.write(
"\r%s mesh shape, %i triangles" %
(next(self.spinning_cursor), tess.ObjGetTriangleCount()))
sys.stdout.flush()
# export to 3JS
shape_full_path = os.path.join(self._path, shape_hash + '.json')
# add this shape to the shape dict, sotres everything related to it
self._3js_shapes[shape_hash] = [
export_edges, color, specular_color, shininess, transparency,
line_color, line_width
]
# generate the mesh
#tess.ExportShapeToThreejs(shape_hash, shape_full_path)
# and also to JSON
with open(shape_full_path, 'w') as json_file:
json_file.write(tess.ExportShapeToThreejsJSONString(shape_uuid))
# draw edges if necessary
edges = []
if export_edges:
# export each edge to a single json
# get number of edges
nbr_edges = tess.ObjGetEdgeCount()
for i_edge in range(nbr_edges):
# after that, the file can be appended
str_to_write = ''
edge_point_set = []
nbr_vertices = tess.ObjEdgeGetVertexCount(i_edge)
for i_vert in range(nbr_vertices):
edge_point_set.append(tess.GetEdgeVertex(i_edge, i_vert))
# write to file
edge_hash = "edg%s" % uuid.uuid4().hex
str_to_write += ExportEdgeToJSON(edge_hash, edge_point_set)
# create the file
edge_full_path = os.path.join(self._path, edge_hash + '.json')
with open(edge_full_path, "w") as edge_file:
edge_file.write(str_to_write)
# store this edge hash
self._edges_hash.append(edge_hash)
def test_export_to_3js_JSON(self):
a_box = BRepPrimAPI_MakeBox(10, 20, 30).Shape()
tess = Tesselator(a_box)
tess.Compute()
# get the JSON string
JSON_str = tess.ExportShapeToThreejsJSONString("myshapeid")
# check the python JSON parser can decode the string
# i.e. the JSON string is well formed
dico = json.loads(JSON_str)
# after that, check that the number of vertices is ok
assert len(dico["data"]["attributes"]["position"]["array"]) == 36 * 3
def _exportThreeJS(filePath, _shape):
_tess = Tesselator(_shape)
_tess.Compute(uv_coords=False, compute_edges=False, mesh_quality=50)
json_shape = _tess.ExportShapeToThreejsJSONString(filePath)
json_shape = json_shape.replace("data\\", "data/")
json_shape = json_shape.replace("\\step_postprocessed\\",
"/step_postprocessed/")
return json_shape
def _write_threejs_json(html_dir, shape):
tess = Tesselator(shape)
tess.Compute(compute_edges=False, mesh_quality=1.)
with open(os.path.join(html_dir, "table.json"), 'w') as f:
f.write(tess.ExportShapeToThreejsJSONString('table'))