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boxespy
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Fix indentiation

This commit is contained in:
Florian Festi 2016-07-09 12:29:37 +02:00
parent 1fcb6c67b1
commit ab05372bcc
1 changed files with 77 additions and 77 deletions
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154
boxes/gears.py
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@ -48,10 +48,10 @@ two_pi = 2 * pi
__version__ = '0.9'
def uutounit(self,nn,uu):
try:
return self.uutounit(nn,uu) # inkscape 0.91
except:
return inkex.uutounit(nn,uu) # inkscape 0.48
try:
return self.uutounit(nn,uu) # inkscape 0.91
except:
return inkex.uutounit(nn,uu) # inkscape 0.48
def linspace(a,b,n):
""" return list of linear interp of a to b in n steps
@ -70,7 +70,7 @@ def point_on_circle(radius, angle):
x = radius * cos(angle)
y = radius * sin(angle)
return (x, y)
def points_to_bbox(p):
""" from a list of points (x,y pairs)
- return the lower-left xy and upper-right xy
@ -91,7 +91,7 @@ def points_to_bbox_center(p):
"""
bbox = points_to_bbox(p)
return ((bbox[0]+bbox[2])/2.0, (bbox[1]+bbox[3])/2.0)
def points_to_svgd(p):
" convert list of points into a closed SVG path list"
f = p[0]
@ -178,67 +178,67 @@ def gear_calculations(num_teeth, circular_pitch, pressure_angle, clearance=0, ri
tooth_thickness
)
def generate_rack_points(tooth_count, pitch, addendum, pressure_angle,
base_height, tab_length, clearance=0, draw_guides=False):
""" Return path (suitable for svg) of the Rack gear.
- rack gear uses straight sides
- involute on a circle of infinite radius is a simple linear ramp
- the meshing circle touches at y = 0,
- the highest elevation of the teeth is at y = +addendum
- the lowest elevation of the teeth is at y = -addendum-clearance
- the base_height extends downwards from the lowest elevation.
- we generate this middle tooth exactly centered on the y=0 line.
(one extra tooth on the right hand side, if number of teeth is even)
"""
spacing = 0.5 * pitch # rolling one pitch distance on the spur gear pitch_diameter.
# roughly center rack in drawing, exact position is so that it meshes
# nicely with the spur gear.
# -0.5*spacing has a gap in the center.
# +0.5*spacing has a tooth in the center.
fudge = +0.5 * spacing
""" Return path (suitable for svg) of the Rack gear.
- rack gear uses straight sides
- involute on a circle of infinite radius is a simple linear ramp
- the meshing circle touches at y = 0,
- the highest elevation of the teeth is at y = +addendum
- the lowest elevation of the teeth is at y = -addendum-clearance
- the base_height extends downwards from the lowest elevation.
- we generate this middle tooth exactly centered on the y=0 line.
(one extra tooth on the right hand side, if number of teeth is even)
"""
spacing = 0.5 * pitch # rolling one pitch distance on the spur gear pitch_diameter.
# roughly center rack in drawing, exact position is so that it meshes
# nicely with the spur gear.
# -0.5*spacing has a gap in the center.
# +0.5*spacing has a tooth in the center.
fudge = +0.5 * spacing
tas = tan(radians(pressure_angle)) * addendum
tasc = tan(radians(pressure_angle)) * (addendum+clearance)
base_top = addendum+clearance
base_bot = addendum+clearance+base_height
tas = tan(radians(pressure_angle)) * addendum
tasc = tan(radians(pressure_angle)) * (addendum+clearance)
base_top = addendum+clearance
base_bot = addendum+clearance+base_height
x_lhs = -pitch * int(0.5*tooth_count-.5) - spacing - tab_length - tasc + fudge
#inkex.debug("angle=%s spacing=%s"%(pressure_angle, spacing))
# Start with base tab on LHS
points = [] # make list of points
points.append((x_lhs, base_bot))
points.append((x_lhs, base_top))
x = x_lhs + tab_length+tasc
x_lhs = -pitch * int(0.5*tooth_count-.5) - spacing - tab_length - tasc + fudge
#inkex.debug("angle=%s spacing=%s"%(pressure_angle, spacing))
# Start with base tab on LHS
points = [] # make list of points
points.append((x_lhs, base_bot))
points.append((x_lhs, base_top))
x = x_lhs + tab_length+tasc
# An involute on a circle of infinite radius is a simple linear ramp.
# We need to add curve at bottom and use clearance.
for i in range(tooth_count):
# move along path, generating the next 'tooth'
# pitch line is at y=0. the left edge hits the pitch line at x
points.append((x-tasc, base_top))
points.append((x+tas, -addendum))
points.append((x+spacing-tas, -addendum))
points.append((x+spacing+tasc, base_top))
x += pitch
x -= spacing # remove last adjustment
# add base on RHS
x_rhs = x+tasc+tab_length
points.append((x_rhs, base_top))
points.append((x_rhs, base_bot))
# We don't close the path here. Caller does it.
# points.append((x_lhs, base_bot))
# An involute on a circle of infinite radius is a simple linear ramp.
# We need to add curve at bottom and use clearance.
for i in range(tooth_count):
# move along path, generating the next 'tooth'
# pitch line is at y=0. the left edge hits the pitch line at x
points.append((x-tasc, base_top))
points.append((x+tas, -addendum))
points.append((x+spacing-tas, -addendum))
points.append((x+spacing+tasc, base_top))
x += pitch
x -= spacing # remove last adjustment
# add base on RHS
x_rhs = x+tasc+tab_length
points.append((x_rhs, base_top))
points.append((x_rhs, base_bot))
# We don't close the path here. Caller does it.
# points.append((x_lhs, base_bot))
# Draw line representing the pitch circle of infinite diameter
guide_path = None
if draw_guides:
p = []
p.append( (x_lhs + 0.5 * tab_length, 0) )
p.append( (x_rhs - 0.5 * tab_length, 0) )
guide_path = points_to_svgd(p)
# return points ready for use in an SVG 'path'
return (points, guide_path)
# Draw line representing the pitch circle of infinite diameter
guide_path = None
if draw_guides:
p = []
p.append( (x_lhs + 0.5 * tab_length, 0) )
p.append( (x_rhs - 0.5 * tab_length, 0) )
guide_path = points_to_svgd(p)
# return points ready for use in an SVG 'path'
return (points, guide_path)
def generate_spur_points(teeth, base_radius, pitch_radius, outer_radius, root_radius, accuracy_involute, accuracy_circular):
""" given a set of core gear params
@ -256,7 +256,7 @@ def generate_spur_points(teeth, base_radius, pitch_radius, outer_radius, root_ra
points = []
for c in centers:
# Angles
# Angles
pitch1 = c - half_thick_angle
base1 = pitch1 - pitch_to_base_angle
offsetangles1 = [ base1 + x for x in angles]
@ -307,13 +307,13 @@ def generate_spokes_path(root_radius, spoke_width, spoke_count, mount_radius, mo
else:
mount_radius = mount_hole/2 + adj_factor # small fix
messages.append("Mount support too small. Auto increased to %2.2f%s." % (mount_radius/unit_factor*2, unit_label))
# then check to see if cross-over on spoke width
if spoke_width * spoke_count +0.5 >= two_pi * mount_radius:
adj_factor = 1.2 # wrong value. its probably one of the points distances calculated below
mount_radius += adj_factor
messages.append("Too many spokes. Increased Mount support by %2.3f%s" % (adj_factor/unit_factor, unit_label))
# check for collision with outer rim
if r_outer <= mount_radius:
# not enough room to draw spokes so cancel
@ -361,12 +361,12 @@ class Gears(inkex.Effect):
action="store", type="int",
dest="teeth", default=24,
help="Number of teeth")
self.OptionParser.add_option("-s", "--system",
action="store", type="string",
dest="system", default='CP',
help="Select system: 'CP' (Cyclic Pitch (default)), 'DP' (Diametral Pitch), 'MM' (Metric Module)")
self.OptionParser.add_option("-d", "--dimension",
action="store", type="float",
dest="dimension", default=1.0,
@ -437,12 +437,12 @@ class Gears(inkex.Effect):
action="store", type="string",
dest="active_tab", default='',
help="Active tab. Not used now.")
self.OptionParser.add_option("-x", "--centercross",
action="store", type="inkbool",
dest="centercross", default=False,
help="Draw cross in center")
self.OptionParser.add_option("-c", "--pitchcircle",
action="store", type="inkbool",
dest="pitchcircle", default=False,
@ -452,17 +452,17 @@ class Gears(inkex.Effect):
action="store", type="inkbool",
dest="drawrack", default=False,
help="Draw rack gear instead of spur gear")
self.OptionParser.add_option("", "--rack-teeth-length",
action="store", type="int",
dest="teeth_length", default=12,
help="Length (in teeth) of rack")
self.OptionParser.add_option("", "--rack-base-height",
action="store", type="float",
dest="base_height", default=8,
help="Height of base of rack")
self.OptionParser.add_option("", "--rack-base-tab",
action="store", type="float",
dest="base_tab", default=14,
@ -473,7 +473,7 @@ class Gears(inkex.Effect):
dest="undercut_alert", default=False,
help="Let the user confirm a warning dialog if undercut occurs. This dialog also shows helpful hints against undercut")
def add_text(self, node, text, position, text_height=12):
""" Create and insert a single line of text into the svg under node.
- use 'text' type and label as anootation
@ -490,7 +490,7 @@ class Gears(inkex.Effect):
line = inkex.etree.SubElement(node, inkex.addNS('text','svg'), line_attribs)
line.text = text
def calc_unit_factor(self):
""" return the scale factor for all dimension conversions.
- The document units are always irrelevant as
@ -586,14 +586,14 @@ class Gears(inkex.Effect):
# alas annotation cannot handle the degree symbol. Also it ignore newlines.
# so split and make a list
warnings.extend(msg.split("\n"))
if self.options.undercut_alert:
if self.options.undercut_alert:
inkex.debug(msg)
else:
else:
print >>self.tty, msg
# All base calcs done. Start building gear
points = generate_spur_points(teeth, base_radius, pitch_radius, outer_radius, root_radius, accuracy_involute, accuracy_circular)
## half_thick_angle = two_pi / (4.0 * teeth ) #?? = pi / (2.0 * teeth)
## pitch_to_base_angle = involute_intersect_angle( base_radius, pitch_radius )
## pitch_to_outer_angle = involute_intersect_angle( base_radius, outer_radius ) - pitch_to_base_angle
@ -658,7 +658,7 @@ class Gears(inkex.Effect):
"A %f,%f %s %s %s %f,%f" % (r,r, 0,0,0, 0,-r) +
"A %f,%f %s %s %s %f,%f" % (r,r, 0,0,0, 0,r)
)
# Embed gear in group to make animation easier:
# Translate group, Rotate path.
t = 'translate(' + str( self.view_center[0] ) + ',' + str( self.view_center[1] ) + ')'