robossembler/framework
7
0
Fork 0
Code Issues 21 Pull requests Projects Releases Packages Wiki Activity Actions

Tessellation: add optional FEM tessellation method

Browse source
This commit is contained in:
brothermechanic 2023-07-04 10:18:10 +03:00 • committed by Igor Brylyov
parent c1e4b0e0f0
commit 247c84d718
2 changed files with 37 additions and 23 deletions
Download patch file Download diff file Expand all files Collapse all files

41
cg/blender/import_fcstd/import_cad_objects.py
View file

@ -61,16 +61,16 @@ render = '_render'
def obj_importer(filename,
tesselation_method="Standard",
tesselation_method='Standard',
linear_deflection=0.1,
angular_deflection=30.0,
max_edge_length=1,
fem_size=5.0,
update=False,
scene_placement=True,
skiphidden=True,
scale=0.001,
select=True,
nonsolid_property = 'Robossembler_NonSolid'):
nonsolid_property='Robossembler_NonSolid'):
''' Reads a FreeCAD .FCStd file and creates Blender objects '''
@ -126,16 +126,20 @@ def obj_importer(filename,
shape = obj.Shape.copy()
shape.Placement = obj.Placement.inverse().multiply(shape.Placement)
meshfromshape = doc.addObject('Mesh::Feature','Mesh')
if tesselation_method == "Mefisto":
if tesselation_method == 'Standard':
meshfromshape.Mesh = MeshPart.meshFromShape(
Shape=shape,
LinearDeflection=linear_deflection,
AngularDeflection=math.radians(angular_deflection),
Relative=False)
else:
elif tesselation_method == 'FEM':
meshfromshape.Mesh = MeshPart.meshFromShape(
Shape=shape,
MaxLength=mefisto_max_length)
Shape=shape,
MaxLength=fem_size)
else:
raise TypeError('Wrong tesselation method! '
'Standard and FEM methods are supported only!')
break
t = meshfromshape.Mesh.Topology
verts = [[v.x,v.y,v.z] for v in t[0]]
faces = t[1]
@ -192,17 +196,18 @@ def obj_importer(filename,
# losted root lcs inlet workaround
lcs_objects = lcs_collection.objects
root_lcs = [lcs for lcs in lcs_objects if lcs.name.endswith(root)][0]
root_inlet_name = ('{}{}'.format(root_lcs.name.split(root)[0], inlet))
if not bpy.data.objects.get(root_inlet_name):
root_inlet = bpy.data.objects.new(root_inlet_name, None)
root_inlet.empty_display_type = 'ARROWS'
root_inlet.empty_display_size = 0.1
root_inlet.show_in_front = True
root_inlet.location = root_lcs.location
root_inlet.rotation_euler = root_lcs.rotation_euler
root_inlet.parent = root_lcs.parent
lcs_collection.objects.link(root_inlet)
if lcs_objects:
root_lcs = [lcs for lcs in lcs_objects if lcs.name.endswith(root)][0]
root_inlet_name = ('{}{}'.format(root_lcs.name.split(root)[0], inlet))
if not bpy.data.objects.get(root_inlet_name):
root_inlet = bpy.data.objects.new(root_inlet_name, None)
root_inlet.empty_display_type = 'ARROWS'
root_inlet.empty_display_size = 0.1
root_inlet.show_in_front = True
root_inlet.location = root_lcs.location
root_inlet.rotation_euler = root_lcs.rotation_euler
root_inlet.parent = root_lcs.parent
lcs_collection.objects.link(root_inlet)
FreeCAD.closeDocument(docname)

19
cg/pipeline/freecad_to_asset.py
View file

@ -59,9 +59,12 @@ hightpoly = '_hp'
lowpoly = '_lp'
render = '_render'
def freecad_asset_pipeline(fcstd_path,
tesselation_method,
linear_deflection,
angular_deflection,
fem_size,
mesh_export_path=None,
json_path=None,
blend_path=None,
@ -72,12 +75,12 @@ def freecad_asset_pipeline(fcstd_path,
remove_collections()
cleanup_orphan_data()
# import objects, tesselation method can be "Standard" by default with linear/angular deflection parameters and Mefisto with max edge length parameter
# import objects
objs_for_render = obj_importer(fcstd_path,
tesselation_method,
linear_deflection,
angular_deflection,
max_edge_length)
tesselation_method,
linear_deflection,
angular_deflection,
fem_size)
# restructuring hierarchy by lcs points
lcs_objects = restruct_hierarchy()
@ -132,10 +135,14 @@ if __name__ == '__main__':
description='Convert and setup FreeCAD solid objects to 3d assets mesh files.')
parser.add_argument(
'--fcstd_path', type=str, help='Path to source FreeCAD scene', required=True)
parser.add_argument(
'--tesselation_method', type=str, help='Select tesselation method: Standard or FEM.', default='Standard', required=False)
parser.add_argument(
'--linear_deflection', type=float, help='Max linear distance error', default=0.1, required=False)
parser.add_argument(
'--angular_deflection', type=float, help='Max angular distance error', default=20.0, required=False)
parser.add_argument(
'--fem_size', type=float, help='For FEM method only! Finite element size in mm', default=1.0, required=False)
parser.add_argument(
'--mesh_export_path', type=str, help='Path for export meshes', required=False)
parser.add_argument(
@ -147,8 +154,10 @@ if __name__ == '__main__':
args = parser.parse_args()
freecad_asset_pipeline(args.fcstd_path,
args.tesselation_method,
args.linear_deflection,
args.angular_deflection,
args.fem_size,
args.mesh_export_path,
args.json_path,
args.blend_path,