76 lines
2.3 KiB
Python
76 lines
2.3 KiB
Python
#! /usr/bin/env python
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# -*- coding: utf-8 -*-
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# Copyright 2014 Hamilton Kibbe <ham@hamiltonkib.be>
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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# http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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gerber.render.apertures
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============
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**Gerber Aperture base classes**
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This module provides base classes for gerber apertures. These are used by
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the rendering engine to draw the gerber file.
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"""
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import math
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class Aperture(object):
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""" Gerber Aperture base class
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"""
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def draw(self, ctx, x, y):
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raise NotImplementedError('The draw method must be implemented \
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in an Aperture subclass.')
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def flash(self, ctx, x, y):
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raise NotImplementedError('The flash method must be implemented \
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in an Aperture subclass.')
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def _arc_params(self, startx, starty, x, y, i, j):
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center = (startx + i, starty + j)
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radius = math.sqrt(math.pow(center[0] - x, 2) +
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math.pow(center[1] - y, 2))
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delta_x0 = startx - center[0]
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delta_y0 = center[1] - starty
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delta_x1 = x - center[0]
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delta_y1 = center[1] - y
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start_angle = math.atan2(delta_y0, delta_x0)
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end_angle = math.atan2(delta_y1, delta_x1)
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return {'center': center, 'radius': radius,
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'start_angle': start_angle, 'end_angle': end_angle}
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class Circle(Aperture):
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""" Circular Aperture base class
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"""
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def __init__(self, diameter=0.0):
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self.diameter = diameter
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class Rect(Aperture):
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""" Rectangular Aperture base class
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"""
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def __init__(self, size=(0, 0)):
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self.size = size
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class Obround(Aperture):
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""" Obround Aperture base class
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"""
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def __init__(self, size=(0, 0)):
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self.size = size
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class Polygon(Aperture):
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""" Polygon Aperture base class
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"""
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pass
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