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wernermisc/cad/test1/button.py

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#!/usr/bin/python
# all dimensions are mm
from cadmium import *
epsilon = 0.01
noise = epsilon/10
but_top_x = 10.0
but_top_y = but_top_x+5.0
but_top_z = 1.5
but_corner_r = 2.0
but_base_border = 1.0
but_base_x = but_top_x+2*but_base_border
but_base_y = but_top_y+2*but_base_border
but_base_z = 0.5
but_fillet_r = 0.4
but_chamfer_r = 0.2
# ----- Helper elements for fillets -------------------------------------------
def fillet_line(x, r):
s = Box(x, r, r)
s -= Cylinder(r, h = x+2*epsilon). \
translate(0, 0, -epsilon). \
rotate(Y_axis, 90). \
translate(0, r, r)
return s.translate(-x/2, 0, 0)
def fillet_circle(r, fillet_r):
return Cylinder(r+fillet_r, h = fillet_r)- \
Torus(r+fillet_r, fillet_r, center = True). \
translate(0, 0, fillet_r)
# ----- Helper elements for chamfers ------------------------------------------
def chamfer_line (x, r):
s = Box(x, r+epsilon, r+epsilon)
s -= Cylinder(r, h = x+2*epsilon). \
translate(0, 0, -epsilon). \
rotate(Y_axis, 90)
return s.translate(-x/2, -r, -r)
def chamfer_circle(r, fillet_r):
return Box(2*(r+epsilon), 2*(r+epsilon), fillet_r+epsilon). \
translate(-r-epsilon, -r-epsilon, -fillet_r)- \
Cylinder(r-fillet_r, h = fillet_r). \
translate(0, 0, -fillet_r)- \
Torus(r-fillet_r, fillet_r, center = True). \
translate(0, 0, -fillet_r)
# ----- Box with rounded corners ----------------------------------------------
def rbox_core(x, y, z, r):
return Box(x-2*r, y, z, center = True).translate(0, 0, z/2)+ \
Box(x, y-2*r, z, center = True).translate(0, 0, z/2)
def rbox(x, y, z, r):
s = rbox_core(x, y, z, r)
for dx in [-1, 1]:
for dy in [-1, 1]:
s += Cylinder(r, h = z). \
translate(dx*(x/2-r), dy*(y/2-r), 0)
return s
def rbox_fillet_bottom(x, y, z, r, fillet_r):
s = None
for a in [0, 180]:
t = fillet_line(x-2*r, fillet_r). \
translate(0, y/2, 0). \
rotate(Z_axis, a)
if s is None:
s = t
else:
s += t
s += fillet_line(y-2*r, fillet_r). \
translate(0, x/2, 0). \
rotate(Z_axis, a+90)
for dx in [-1, 1]:
for dy in [-1, 1]:
s += fillet_circle(r, fillet_r). \
translate(dx*(x/2-r), dy*(y/2-r), 0)
return s
def rbox_chamfer_top_corners(x, y, z, r, chamfer_r):
s = None
for dx in [-1, 1]:
for dy in [-1, 1]:
t = chamfer_circle(r, chamfer_r). \
translate(dx*(x/2-r), dy*(y/2-r), z)
if s is None:
s = t
else:
s += t
return s-rbox_core(x-epsilon, y-epsilon, z, r)
def rbox_chamfer_top(x, y, z, r, chamfer_r):
s = rbox_chamfer_top_corners(x, y, z, r, chamfer_r)
for a in [0, 180]:
s += chamfer_line(x-2*r, chamfer_r). \
translate(0, y/2, z+noise). \
rotate(Z_axis, a)
s += chamfer_line(y-2*r, chamfer_r). \
translate(0, x/2, z+noise). \
rotate(Z_axis, a+90)
return s
def rbox_chamfer_bottom(x, y, z, r, chamfer_r):
return rbox_chamfer_top(x, y, z, r, chamfer_r). \
translate(0, 0, -z). \
rotate(X_axis, 180)
# ----- Button ----------------------------------------------------------------
def button_top():
return rbox(but_top_x, but_top_y, but_top_z, but_corner_r)- \
rbox_chamfer_top(but_top_x, but_top_y, but_top_z, \
but_corner_r, but_chamfer_r)+ \
rbox_fillet_bottom(but_top_x, but_top_y, but_top_z, but_corner_r,
but_fillet_r)
def button_base():
s = rbox(but_base_x, but_base_y, but_base_z, but_corner_r)- \
rbox_chamfer_top(but_base_x, but_base_y, but_base_z, \
but_corner_r, but_chamfer_r)- \
rbox_chamfer_bottom(but_base_x, but_base_y, but_base_z, \
but_corner_r, but_chamfer_r)
return s.translate(0, 0, -but_base_z)
def button():
return button_top()+button_base()
b = button()
b.toSTL("button.stl")