Gallery#

Interactive USD BRep models, converted to meshes for the browser. Drag to rotate, scroll to zoom, right-drag to pan. Hover a face or an edge to inspect it: faces report their surface type and exact area, edges their length.

Built with the Python API#

Each model is the output of the code under it.

CSG: intersect, then subtract#

import usd_brep as sm

box = sm.create_box((-5, -5, -5), 10, 10, 10)
body = sm.boolean_intersection(box, sm.create_sphere((0, 0, 0), 6.5))
# Unequal radii, so the holes never meet tangentially.
for axis, radius in [(None, 3), ((1, 0, 0), 2.5), ((0, 1, 0), 2)]:
    hole = sm.create_cylinder((0, 0, -8), radius, 16)
    if axis:
        sm.rotate(hole, (0, 0, 0), axis, 90)
    body = sm.boolean_difference(body, hole)
model = body

Plate with holes: boolean difference#

import usd_brep as sm

plate = sm.create_box((0, 0, 0), 40, 24, 4)
for x, y in [(5, 5), (35, 5), (5, 19), (35, 19)]:
    hole = sm.create_cylinder((x, y, -1), 1.6, 6)
    plate = sm.boolean_difference(plate, hole)
bore = sm.create_cylinder((20, 12, -1), 6, 6)
model = sm.boolean_difference(plate, bore)

Bracket: union, then fillet the inside edge#

import usd_brep as sm

base = sm.create_box((0, 0, 0), 20, 12, 3)
wall = sm.create_box((0, 0, 0), 3, 12, 16)
bracket = sm.boolean_union(base, wall)

def inside_corner(edge):  # runs along y at x = z = 3
    (x0, _, z0), (x1, _, z1) = edge.bounding_box(tight=True)
    return max(abs(v - 3) for v in (x0, z0, x1, z1)) < 1e-6

edges = [e for e in bracket.edges() if inside_corner(e)]
sm.fillet_edges(bracket, edges, radius=2.0)
model = bracket

Rounded box: fillet every edge#

import usd_brep as sm

model = sm.create_box((0, 0, 0), 20, 12, 8)
sm.circular_fillet(model, 2.0)

Tray: shell a box, removing the top face#

import usd_brep as sm

box = sm.create_box((0, 0, 0), 20, 14, 8)
top = next(f for f in box.faces()
           if f.bounding_box(tight=True)[0][2] == 8)
model = sm.shell_brep(box, -1.0, create_solid=True,
                      faces_to_shell=[top])

Pulley: revolve a closed profile#

import usd_brep as sm

# Closed (radius, height) profile with a V groove, in the xz plane.
rz = [(2, 0), (10, 0), (10, 3), (8.5, 4), (10, 5), (10, 8), (2, 8),
      (2, 0)]
profile = [sm.create_line_segment((r0, 0, z0), (r1, 0, z1))
           for (r0, z0), (r1, z1) in zip(rz, rz[1:])]
model = sm.rotational_sweep(profile, (0, 0, 0), (0, 0, 1), 360,
                            cap_ends=True)

Spring: pipe sweep along a helix#

import usd_brep as sm

helix = sm.create_helix((0, 0, 0), height=10, radius_start=2,
                        radius_end=2, turns=5)
model = sm.pipe_sweep(helix, radius=0.3)

Test parts#

Parts from the repository’s test data, TestFiles/pt_TestFiles.

LShape II

Defeature/LShape_II.smb · 25 faces

Platte

Defeature/Platte.smb · 122 faces

Defillet

Defeature/defillet.smb · 9 faces

Extrusion

Defeature/extrusion.smb · 11 faces

Box diff 3cyls

Fillet/box_diff_3cyls.smb · 13 faces

Box w slot

Fillet/box_w_slot.smb · 27 faces

Cliff 1

Fillet/cliff_1.smb · 43 faces

Crown

Fillet/crown.smb · 13 faces

Cyl on box w tan hole2

Fillet/cyl_on_box_w_tan_hole2.smb · 13 faces

Rollover corner

Fillet/rollover_corner.smb · 8 faces

Boolean trees result

Solids/boolean_trees_result.smb · 15 faces

Extrusion2

Solids/extrusion2.smb · 26 faces

Offset bracket2

Solids/offset_bracket2.smb · 59 faces

Revolution 360

Solids/revolution_360.smb · 29 faces

Revolution mold

Solids/revolution_mold.smb · 33 faces