Kicad AutoRouter, ARRR. An autorouter kludge for KiCad 6 and Python 3. https://spacecruft.org/spacecruft/kararrr
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#!/usr/bin/python3 -tt
# -*- coding: utf-8 -*-
# Copyright (C) 2014 Chris Hinsley All Rights Reserved
# Copyright (C) 2022 Jeff Moe
import os, sys, argparse, select, tkinter, aggdraw
from ast import literal_eval
from itertools import islice, chain
from PIL import Image, ImageTk
from mymath import *
MARGIN = 2
args = None
photo = None
image = None
def split_paths(paths):
new_paths = []
for path in paths:
new_path = []
for a, b in zip(path, islice(path, 1, None)):
_, _, za = a
_, _, zb = b
if za != zb:
if new_path:
new_path.append(a)
new_paths.append(new_path)
new_paths.append([a, b])
new_path = []
else:
new_path.append(a)
if new_path:
new_path.append(path[-1])
new_paths.append(new_path)
return new_paths
def scale_and_split_tracks(tracks, scale):
for track in tracks:
track[0] *= scale
track[1] *= scale
track[2] *= scale
track[4] = split_paths(track[4])
for i in range(len(track[3])):
r, g, (x, y, z), s = track[3][i]
track[3][i] = r * scale, g * scale, ((x + MARGIN) * scale, (y + MARGIN) * scale, z), [(cx * scale, cy * scale) for cx, cy in s]
for path in track[4]:
for i in range(len(path)):
x, y, z = path[i]
path[i] = (x + MARGIN) * scale, (y + MARGIN) * scale, z
def get_tracks():
tracks = []
while True:
line = args.infile.readline()
if not line:
tracks = []
break
track = literal_eval(line.strip())
if not track:
break
tracks.append(track)
return tracks
def doframe(dimensions, root, canvas, poll):
global photo, image
tracks = get_tracks()
if poll:
while poll.poll(1):
new_tracks = get_tracks()
if not new_tracks:
break
tracks = new_tracks
if not tracks:
return
pcb_width, pcb_height, pcb_depth = dimensions
scale = args.s[0]
scale_and_split_tracks(tracks, scale)
pcb_width += MARGIN * 2; pcb_height += MARGIN * 2
img_width = int(pcb_width * scale)
if args.o[0] == 0:
img_height = int(pcb_height * scale)
else:
img_height = int(pcb_height * pcb_depth * scale)
canvas.delete("all")
image = Image.new("RGB", (img_width, img_height), "black")
ctx = aggdraw.Draw(image)
black_brush = aggdraw.Brush('black', opacity = 255)
white_brush = aggdraw.Brush('white', opacity = 255)
red_brush = aggdraw.Brush('red', opacity = 255)
if args.o[0] == 0:
colors = ['red', 'green', 'blue', 'yellow', 'fuchsia', 'aqua']
for depth in range(pcb_depth - 1, -1, -1):
brush = aggdraw.Brush(colors[depth % len(colors)], opacity = 128)
for track in tracks:
radius, via, gap, terminals, paths = track
for path in paths:
if path[0][2] == path[-1][2] == depth:
points = list(chain.from_iterable(thicken_path_2d([(x, y) for x, y, _ in path], radius, 3, 2)))
ctx.polygon(points, brush)
for track in tracks:
radius, via, gap, terminals, paths = track
for path in paths:
if path[0][2] != path[-1][2]:
x, y, _ = path[0]
ctx.ellipse((x - via, y - via, x + via, y + via), white_brush)
for r, g, (x, y, _), s in terminals:
if not s:
ctx.ellipse((x - r, y - r, x + r, y + r), white_brush)
else:
if r != 0:
points = list(chain.from_iterable(thicken_path_2d([(cx + x, cy + y) for cx, cy in s], r, 3, 2)))
ctx.polygon(points, white_brush)
else:
points = list(chain.from_iterable([(cx + x, cy + y) for cx, cy in s]))
ctx.polygon(points, white_brush)
else:
for depth in range(pcb_depth):
for track in tracks:
radius, via, gap, terminals, paths = track
for path in paths:
if path[0][2] == path[-1][2] == depth:
points = list(chain.from_iterable(thicken_path_2d([(x, y + depth * pcb_height * scale) for x, y, _ in path], radius + gap, 3, 2)))
ctx.polygon(points, white_brush)
for track in tracks:
radius, via, gap, terminals, paths = track
for path in paths:
if path[0][2] != path[-1][2]:
x, y, _ = path[0]
y += depth * pcb_height * scale
ctx.ellipse((x - via - gap, y - via - gap, x + via + gap, y + via + gap), white_brush)
for r, g, (x, y, _), s in terminals:
y += depth * pcb_height * scale
if not s:
ctx.ellipse((x - r - g, y - r - g, x + r + g, y + r + g), white_brush)
else:
points = list(chain.from_iterable(thicken_path_2d([(cx + x, cy + y) for cx, cy in s], r + g, 3, 2)))
ctx.polygon(points, white_brush)
if r == 0:
points = list(chain.from_iterable([(cx + x, cy + y) for cx, cy in s]))
ctx.polygon(points, white_brush)
for depth in range(pcb_depth):
for track in tracks:
radius, via, gap, terminals, paths = track
for path in paths:
if path[0][2] == path[-1][2] == depth:
points = list(chain.from_iterable(thicken_path_2d([(x, y + depth * pcb_height * scale) for x, y, _ in path], radius, 3, 2)))
ctx.polygon(points, black_brush)
for track in tracks:
radius, via, gap, terminals, paths = track
for path in paths:
if path[0][2] != path[-1][2]:
x, y, _ = path[0]
y += depth * pcb_height * scale
ctx.ellipse((x - via, y - via, x + via, y + via), black_brush)
for r, g, (x, y, _), s in terminals:
y += depth * pcb_height * scale
if not s:
ctx.ellipse((x - r, y - r, x + r, y + r), black_brush)
else:
if r != 0:
points = list(chain.from_iterable(thicken_path_2d([(cx + x, cy + y) for cx, cy in s], r, 3, 2)))
ctx.polygon(points, black_brush)
else:
points = list(chain.from_iterable([(cx + x, cy + y) for cx, cy in s]))
ctx.polygon(points, black_brush)
ctx.flush()
photo = ImageTk.PhotoImage(image)
canvas.create_image(0, 0, image = photo, anchor = tkinter.NW)
root.update()
root.after(0, doframe, dimensions, root, canvas, poll)
def about_menu_handler():
pass
def main():
global args, image
parser = argparse.ArgumentParser(description = 'Pcb layout viewer.')
parser.add_argument('infile', nargs = '?', type = argparse.FileType('r'), default = sys.stdin, help = 'filename, default stdin')
parser.add_argument('--s', nargs = 1, type = int, default = [9], help = 'scale factor, default 9')
parser.add_argument('--f', nargs = 1, type = float, default = [100.0], help = 'framerate, default 100.0')
parser.add_argument('--i', nargs = 1, default = ['pcb.png'], help = 'filename, default pcb.png')
parser.add_argument('--o', nargs = 1, type = int, default = [0], choices=range(0, 2), help = 'overlay modes 0..1, default 0')
args = parser.parse_args()
poll = 0
if os.name != 'nt':
if args.infile == sys.stdin:
poll = select.poll()
poll.register(args.infile, select.POLLIN)
dimensions = literal_eval(args.infile.readline().strip())
pcb_width, pcb_height, pcb_depth = dimensions
pcb_width += MARGIN * 2; pcb_height += MARGIN * 2
scale = args.s[0]
pcb_width = int(pcb_width * scale)
if args.o[0] == 0:
pcb_height = int(pcb_height * scale)
else:
pcb_height = int(pcb_height * pcb_depth * scale)
root = tkinter.Tk()
root.maxsize(pcb_width, pcb_height)
root.minsize(pcb_width, pcb_height)
root.title("PCB Veiwer")
menu_bar = tkinter.Menu(root)
sub_menu = tkinter.Menu(menu_bar)
menu_bar.add_cascade(label = 'Help', menu = sub_menu)
sub_menu.add_command(label = 'About', command = about_menu_handler)
root['menu'] = menu_bar
canvas = tkinter.Canvas(root, width = pcb_width, height = pcb_height)
canvas['background'] = 'black'
canvas.pack()
root.after(0, doframe, dimensions, root, canvas, poll)
root.mainloop()
image.save(args.i[0])
if __name__ == '__main__':
main()