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authorjaseg <git@jaseg.de>2023-09-29 18:30:02 +0200
committerjaseg <git@jaseg.de>2023-09-29 18:30:02 +0200
commit4400dc361e90d623a3a4ef327899773ee6370be5 (patch)
treeab529130aa205d4a74e59cf4304ab891ebb4be06 /twisted_coil_gen_twolayer.py
parentfdaf3c7e93467634f91142668a39e1ac2a3fb725 (diff)
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mag mesh gen looks good
Diffstat (limited to 'twisted_coil_gen_twolayer.py')
-rw-r--r--twisted_coil_gen_twolayer.py67
1 files changed, 49 insertions, 18 deletions
diff --git a/twisted_coil_gen_twolayer.py b/twisted_coil_gen_twolayer.py
index 475fe16..f603cd0 100644
--- a/twisted_coil_gen_twolayer.py
+++ b/twisted_coil_gen_twolayer.py
@@ -132,7 +132,7 @@ def traces_to_gmsh(traces, mesh_out, bbox, model_name='gerbonara_board', log=Tru
points_inside = {tag for _dim, tag in gmsh.model.getEntitiesInBoundingBox(x1+eps, y1+eps, z0+eps, x1+w-eps, y1+d-eps, z0+ab_h-eps, dim=0)}
gmsh.model.mesh.setSize([(0, tag) for tag in points_airbox_adjacent - points_inside], 10e-3)
- gmsh.option.setNumber('Mesh.MeshSizeFromCurvature', 90)
+ #gmsh.option.setNumber('Mesh.MeshSizeFromCurvature', 90)
gmsh.option.setNumber('Mesh.Smoothing', 10)
gmsh.option.setNumber('Mesh.Algorithm3D', 10)
gmsh.option.setNumber('Mesh.MeshSizeMax', 1)
@@ -144,7 +144,7 @@ def traces_to_gmsh(traces, mesh_out, bbox, model_name='gerbonara_board', log=Tru
gmsh.write(str(mesh_out))
-def traces_to_gmsh_mag(traces, mesh_out, bbox, model_name='gerbonara_board', log=True, copper_thickness=0.035, board_thickness=0.8, air_box_margin=5.0):
+def traces_to_gmsh_mag(traces, mesh_out, bbox, model_name='gerbonara_board', log=True, copper_thickness=0.035, board_thickness=0.8, air_box_margin_h=30.0, air_box_margin_v=80.0):
import gmsh
occ = gmsh.model.occ
eps = 1e-6
@@ -159,6 +159,7 @@ def traces_to_gmsh_mag(traces, mesh_out, bbox, model_name='gerbonara_board', log
trace_tags = []
trace_ends = set()
render_cache = {}
+ first_disk, last_disk = None, None
for i, tr in enumerate(traces, start=1):
layer = tr[1].layer
z0 = 0 if layer == 'F.Cu' else -(board_thickness+copper_thickness)
@@ -186,11 +187,21 @@ def traces_to_gmsh_mag(traces, mesh_out, bbox, model_name='gerbonara_board', log
trace_ends.add(disc_id)
cylinder_tag = occ.addCylinder(x, y, z0, 0, 0, copper_thickness, w/2)
tags.append(cylinder_tag)
+
+ if first_disk is None:
+ occ.synchronize()
+ adjacent = gmsh.model.getAdjacencies(3, cylinder_tag)
+ first_disk = adjacent
+ elif i == len(traces) and last_disk is None:
+ occ.synchronize()
+ adjacent = gmsh.model.getAdjacencies(3, cylinder_tag)
+ last_disk = adjacent
for elem in tr:
if isinstance(elem, kicad_pcb.Via):
cylinder_tag = occ.addCylinder(elem.at.x, elem.at.y, 0, 0, 0, -board_thickness, elem.drill)
tags.append(cylinder_tag)
+ occ.synchronize()
print('fusing', tags)
tags, tag_map = occ.fuse([(3, tags[0])], [(3, tag) for tag in tags[1:]])
@@ -205,52 +216,72 @@ def traces_to_gmsh_mag(traces, mesh_out, bbox, model_name='gerbonara_board', log
assert len(tags) == 1
(_dim, toplevel_tag), = tags
+ (x1, y1), (x2, y2) = bbox
+ #print('first disk', first_disk)
+ #print('bbox', [occ.getBoundingBox(2, tag) for tag in first_disk[1]])
+ #print('last disk', last_disk)
+ #print('bbox', [occ.getBoundingBox(2, tag) for tag in last_disk[1]])
+
first_geom = traces[0][0]
- interface_tag_top = occ.addDisk(first_geom.start.x, first_geom.start.y, 0, first_geom.width, first_geom.width)
- interface_tag_bottom = occ.addDisk(first_geom.end.x, first_geom.end.y, -board_thickness, first_geom.width, first_geom.width)
+ interface_tag_top = occ.addDisk(first_geom.start.x, first_geom.start.y, 0, first_geom.width/2, first_geom.width/2)
+ interface_tag_bottom = occ.addDisk(first_geom.start.x, first_geom.start.y, -board_thickness, first_geom.width/2, first_geom.width/2)
+
+ #occ.synchronize()
+ #_, toplevel_adjacent = gmsh.model.getAdjacencies(3, toplevel_tag)
+
+ #x0, y0, w = traces[0][0].start.x, traces[0][0].start.y, traces[0][0].width
+ #print(x0, y0, w)
+ #in_bbox = occ.getEntitiesInBoundingBox(x0-w/2-eps, y0-w/2-eps, -board_thickness-eps, x0+w/2+eps, y0+w/2+eps, eps, dim=1)
+ #print('in bbox', in_bbox)
+ #for dim, tag in in_bbox:
+ # print(tag, 'adjacent', gmsh.model.getAdjacencies(dim, tag))
+
+ #print('fragment', occ.fragment([(2, tag) for tag in toplevel_adjacent], [(2, interface_tag_top), (2, interface_tag_bottom)]))
- (x1, y1), (x2, y2) = bbox
substrate = occ.addBox(x1, y1, -board_thickness, x2-x1, y2-y1, board_thickness)
- x1, y1 = x1-air_box_margin, y1-air_box_margin
- x2, y2 = x2+air_box_margin, y2+air_box_margin
+ x1, y1 = x1-air_box_margin_h, y1-air_box_margin_h
+ x2, y2 = x2+air_box_margin_h, y2+air_box_margin_h
w, d = x2-x1, y2-y1
- z0 = -board_thickness-air_box_margin
- ab_h = board_thickness + 2*air_box_margin
+ z0 = -board_thickness-air_box_margin_v
+ ab_h = board_thickness + 2*air_box_margin_v
airbox = occ.addBox(x1, y1, z0, w, d, ab_h)
print('Cutting airbox')
- occ.cut([(3, airbox)], [(3, toplevel_tag)], removeObject=True, removeTool=False)
+ occ.cut([(3, airbox)], [(3, toplevel_tag), (3, substrate)], removeObject=True, removeTool=False)
print('Cutting substrate')
occ.cut([(3, substrate)], [(3, toplevel_tag)], removeObject=True, removeTool=False)
+ occ.fragment([(3, airbox)], [(3, substrate), (3, toplevel_tag)])
+
print('Synchronizing')
occ.synchronize()
substrate_physical = gmsh.model.add_physical_group(3, [substrate], name='substrate')
airbox_physical = gmsh.model.add_physical_group(3, [airbox], name='airbox')
- trace_physical_surfaces = [
- gmsh.model.add_physical_group(2, list(gmsh.model.getAdjacencies(3, tag)[1]), name=f'trace{i}')
- for i, tag in trace_tags.items()]
+ trace_physical = gmsh.model.add_physical_group(3, [toplevel_tag], name='trace')
+ interface_top_physical = gmsh.model.add_physical_group(2, [interface_tag_top], name='interface_top')
+ interface_bottom_physical = gmsh.model.add_physical_group(2, [interface_tag_bottom], name='interface_bottom')
airbox_adjacent = set(gmsh.model.getAdjacencies(3, airbox)[1])
- in_bbox = {tag for _dim, tag in gmsh.model.getEntitiesInBoundingBox(x1+eps, y1+eps, z0+eps, x1+w-eps, y1+d-eps, z0+ab_h-eps, dim=3)}
+ in_bbox = {tag for _dim, tag in gmsh.model.getEntitiesInBoundingBox(x1+eps, y1+eps, z0+eps, x2-eps, y2-eps, z0+ab_h-eps, dim=2)}
airbox_physical_surface = gmsh.model.add_physical_group(2, list(airbox_adjacent - in_bbox), name='airbox_surface')
points_airbox_adjacent = set(gmsh.model.getAdjacencies(0, airbox)[1])
points_inside = {tag for _dim, tag in gmsh.model.getEntitiesInBoundingBox(x1+eps, y1+eps, z0+eps, x1+w-eps, y1+d-eps, z0+ab_h-eps, dim=0)}
gmsh.model.mesh.setSize([(0, tag) for tag in points_airbox_adjacent - points_inside], 10e-3)
- gmsh.option.setNumber('Mesh.MeshSizeFromCurvature', 90)
+ gmsh.option.setNumber('Mesh.MeshSizeFromCurvature', 32)
gmsh.option.setNumber('Mesh.Smoothing', 10)
gmsh.option.setNumber('Mesh.Algorithm3D', 10)
- gmsh.option.setNumber('Mesh.MeshSizeMax', 1)
+ gmsh.option.setNumber('Mesh.MeshSizeMax', 10)
+ gmsh.option.setNumber('Mesh.MeshSizeMin', 0.08)
gmsh.option.setNumber('General.NumThreads', multiprocessing.cpu_count())
print('Meshing')
gmsh.model.mesh.generate(dim=3)
- print('Writing')
+ print('Writing to', str(mesh_out))
gmsh.write(str(mesh_out))
@@ -723,7 +754,7 @@ def generate(outfile, turns, outer_diameter, inner_diameter, via_diameter, via_d
traces_to_gmsh(traces, mesh_out, ((-r, -r), (r, r)))
if mag_mesh_out:
- traces_to_gmsh_mag(traces, mesh_out, ((-r, -r), (r, r)))
+ traces_to_gmsh_mag(traces, mag_mesh_out, ((-r, -r), (r, r)))
if magneticalc_out:
traces_to_magneticalc(traces, magneticalc_out)