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authorjaseg <git@jaseg.de>2022-02-05 12:34:28 +0100
committerjaseg <git@jaseg.de>2022-02-05 12:34:28 +0100
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-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-#
-# Example using pcb-tools with tsp-solver (github.com/dmishin/tsp-solver) to
-# optimize tool paths in an Excellon file.
-#
-#
-# Copyright 2015 Hamilton Kibbe <ham@hamiltonkib.be>
-# Based on a script by https://github.com/koppi
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations under
-# the License.
-
-import sys
-import math
-import gerber
-from operator import sub
-from gerber.excellon import DrillHit
-
-try:
- from tsp_solver.greedy import solve_tsp
-except ImportError:
- print('\n=================================================================\n'
- 'This example requires tsp-solver be installed in order to run.\n\n'
- 'tsp-solver can be downloaded from:\n'
- ' http://github.com/dmishin/tsp-solver.\n'
- '=================================================================')
- sys.exit(0)
-
-
-if __name__ == '__main__':
-
- # Get file name to open
- if len(sys.argv) < 2:
- fname = 'gerbers/shld.drd'
- else:
- fname = sys.argv[1]
-
- # Read the excellon file
- f = gerber.read(fname)
-
- positions = {}
- tools = {}
- hit_counts = f.hit_count()
- oldpath = sum(f.path_length().values())
-
- #Get hit positions
- for hit in f.hits:
- tool_num = hit.tool.number
- if tool_num not in positions.keys():
- positions[tool_num] = []
- positions[tool_num].append(hit.position)
-
- hits = []
-
- # Optimize tool path for each tool
- for tool, count in iter(hit_counts.items()):
-
- # Calculate distance matrix
- distance_matrix = [[math.hypot(*tuple(map(sub,
- positions[tool][i],
- positions[tool][j])))
- for j in iter(range(count))]
- for i in iter(range(count))]
-
- # Calculate new path
- path = solve_tsp(distance_matrix, 50)
-
- # Create new hits list
- hits += [DrillHit(f.tools[tool], positions[tool][p]) for p in path]
-
- # Update the file
- f.hits = hits
- f.filename = f.filename + '.optimized'
- f.write()
-
- # Print drill report
- print(f.report())
- print('Original path length: %1.4f' % oldpath)
- print('Optimized path length: %1.4f' % sum(f.path_length().values()))
-