Fix indentiation
This commit is contained in:
Florian Festi
parent
1fcb6c67b1
commit
ab05372bcc
120
boxes/gears.py
120
boxes/gears.py
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@ -48,10 +48,10 @@ two_pi = 2 * pi
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__version__ = '0.9'
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__version__ = '0.9'
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def uutounit(self,nn,uu):
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def uutounit(self,nn,uu):
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try:
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try:
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return self.uutounit(nn,uu) # inkscape 0.91
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return self.uutounit(nn,uu) # inkscape 0.91
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except:
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except:
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return inkex.uutounit(nn,uu) # inkscape 0.48
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return inkex.uutounit(nn,uu) # inkscape 0.48
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def linspace(a,b,n):
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def linspace(a,b,n):
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""" return list of linear interp of a to b in n steps
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""" return list of linear interp of a to b in n steps
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@ -181,63 +181,63 @@ def gear_calculations(num_teeth, circular_pitch, pressure_angle, clearance=0, ri
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def generate_rack_points(tooth_count, pitch, addendum, pressure_angle,
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def generate_rack_points(tooth_count, pitch, addendum, pressure_angle,
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base_height, tab_length, clearance=0, draw_guides=False):
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base_height, tab_length, clearance=0, draw_guides=False):
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""" Return path (suitable for svg) of the Rack gear.
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""" Return path (suitable for svg) of the Rack gear.
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- rack gear uses straight sides
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- rack gear uses straight sides
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- involute on a circle of infinite radius is a simple linear ramp
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- involute on a circle of infinite radius is a simple linear ramp
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- the meshing circle touches at y = 0,
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- the meshing circle touches at y = 0,
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- the highest elevation of the teeth is at y = +addendum
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- the highest elevation of the teeth is at y = +addendum
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- the lowest elevation of the teeth is at y = -addendum-clearance
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- the lowest elevation of the teeth is at y = -addendum-clearance
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- the base_height extends downwards from the lowest elevation.
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- the base_height extends downwards from the lowest elevation.
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- we generate this middle tooth exactly centered on the y=0 line.
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- we generate this middle tooth exactly centered on the y=0 line.
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(one extra tooth on the right hand side, if number of teeth is even)
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(one extra tooth on the right hand side, if number of teeth is even)
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"""
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"""
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spacing = 0.5 * pitch # rolling one pitch distance on the spur gear pitch_diameter.
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spacing = 0.5 * pitch # rolling one pitch distance on the spur gear pitch_diameter.
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# roughly center rack in drawing, exact position is so that it meshes
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# roughly center rack in drawing, exact position is so that it meshes
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# nicely with the spur gear.
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# nicely with the spur gear.
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# -0.5*spacing has a gap in the center.
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# -0.5*spacing has a gap in the center.
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# +0.5*spacing has a tooth in the center.
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# +0.5*spacing has a tooth in the center.
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fudge = +0.5 * spacing
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fudge = +0.5 * spacing
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tas = tan(radians(pressure_angle)) * addendum
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tas = tan(radians(pressure_angle)) * addendum
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tasc = tan(radians(pressure_angle)) * (addendum+clearance)
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tasc = tan(radians(pressure_angle)) * (addendum+clearance)
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base_top = addendum+clearance
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base_top = addendum+clearance
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base_bot = addendum+clearance+base_height
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base_bot = addendum+clearance+base_height
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x_lhs = -pitch * int(0.5*tooth_count-.5) - spacing - tab_length - tasc + fudge
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x_lhs = -pitch * int(0.5*tooth_count-.5) - spacing - tab_length - tasc + fudge
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#inkex.debug("angle=%s spacing=%s"%(pressure_angle, spacing))
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#inkex.debug("angle=%s spacing=%s"%(pressure_angle, spacing))
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# Start with base tab on LHS
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# Start with base tab on LHS
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points = [] # make list of points
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points = [] # make list of points
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points.append((x_lhs, base_bot))
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points.append((x_lhs, base_bot))
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points.append((x_lhs, base_top))
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points.append((x_lhs, base_top))
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x = x_lhs + tab_length+tasc
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x = x_lhs + tab_length+tasc
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# An involute on a circle of infinite radius is a simple linear ramp.
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# An involute on a circle of infinite radius is a simple linear ramp.
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# We need to add curve at bottom and use clearance.
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# We need to add curve at bottom and use clearance.
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for i in range(tooth_count):
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for i in range(tooth_count):
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# move along path, generating the next 'tooth'
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# move along path, generating the next 'tooth'
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# pitch line is at y=0. the left edge hits the pitch line at x
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# pitch line is at y=0. the left edge hits the pitch line at x
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points.append((x-tasc, base_top))
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points.append((x-tasc, base_top))
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points.append((x+tas, -addendum))
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points.append((x+tas, -addendum))
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points.append((x+spacing-tas, -addendum))
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points.append((x+spacing-tas, -addendum))
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points.append((x+spacing+tasc, base_top))
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points.append((x+spacing+tasc, base_top))
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x += pitch
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x += pitch
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x -= spacing # remove last adjustment
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x -= spacing # remove last adjustment
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# add base on RHS
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# add base on RHS
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x_rhs = x+tasc+tab_length
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x_rhs = x+tasc+tab_length
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points.append((x_rhs, base_top))
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points.append((x_rhs, base_top))
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points.append((x_rhs, base_bot))
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points.append((x_rhs, base_bot))
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# We don't close the path here. Caller does it.
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# We don't close the path here. Caller does it.
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# points.append((x_lhs, base_bot))
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# points.append((x_lhs, base_bot))
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# Draw line representing the pitch circle of infinite diameter
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# Draw line representing the pitch circle of infinite diameter
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guide_path = None
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guide_path = None
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if draw_guides:
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if draw_guides:
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p = []
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p = []
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p.append( (x_lhs + 0.5 * tab_length, 0) )
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p.append( (x_lhs + 0.5 * tab_length, 0) )
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p.append( (x_rhs - 0.5 * tab_length, 0) )
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p.append( (x_rhs - 0.5 * tab_length, 0) )
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guide_path = points_to_svgd(p)
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guide_path = points_to_svgd(p)
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# return points ready for use in an SVG 'path'
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# return points ready for use in an SVG 'path'
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return (points, guide_path)
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return (points, guide_path)
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def generate_spur_points(teeth, base_radius, pitch_radius, outer_radius, root_radius, accuracy_involute, accuracy_circular):
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def generate_spur_points(teeth, base_radius, pitch_radius, outer_radius, root_radius, accuracy_involute, accuracy_circular):
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@ -256,7 +256,7 @@ def generate_spur_points(teeth, base_radius, pitch_radius, outer_radius, root_ra
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points = []
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points = []
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for c in centers:
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for c in centers:
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# Angles
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# Angles
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pitch1 = c - half_thick_angle
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pitch1 = c - half_thick_angle
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base1 = pitch1 - pitch_to_base_angle
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base1 = pitch1 - pitch_to_base_angle
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offsetangles1 = [ base1 + x for x in angles]
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offsetangles1 = [ base1 + x for x in angles]
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@ -586,9 +586,9 @@ class Gears(inkex.Effect):
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# alas annotation cannot handle the degree symbol. Also it ignore newlines.
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# alas annotation cannot handle the degree symbol. Also it ignore newlines.
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# so split and make a list
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# so split and make a list
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warnings.extend(msg.split("\n"))
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warnings.extend(msg.split("\n"))
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if self.options.undercut_alert:
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if self.options.undercut_alert:
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inkex.debug(msg)
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inkex.debug(msg)
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else:
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else:
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print >>self.tty, msg
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print >>self.tty, msg
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# All base calcs done. Start building gear
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# All base calcs done. Start building gear
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