def ruler(start_coord, end_coord, units, min_tick_height, symmetric=False):
"""
A measuring ruler.
- `units` is a list of units on which to put marks, from smaller
to larger. e.g., (10, 20, 40).
- `min_tick_height` is the height of the marks for the smallest units.
The hight of the other units are multiples of this.
- `symmetric` set to True to draw the tick lines symmetrically around
the invisible center-line.
"""
start_coord = Coordinate(*start_coord)
end_coord = Coordinate(*end_coord)
length = (end_coord - start_coord).magnitude
angle = (end_coord - start_coord).angle
result = []
for i, unit in enumerate(units):
ticks = int(math.ceil(length / unit))
for t in range(ticks):
tick_height = min_tick_height * (i + 1)
if symmetric:
x1, y1 = unit * t, tick_height / 2
x2, y2 = unit * t, -tick_height / 2
else:
x1, y1 = unit * t, 0
x2, y2 = unit * t, -tick_height
tick = line((x1, y1), (x2, y2))
result.append(tick)
g = Group(result)
rotate(g, angle, (0, 0))
offset(g, start_coord)
return g
def ruler(start_coord, end_coord, units, min_tick_height, symmetric=False):
'''
A measuring ruler.
- `units` is a list of units on which to put marks, from smaller
to larger. e.g., (10, 20, 40).
- `min_tick_height` is the height of the marks for the smallest units.
The hight of the other units are multiples of this.
- `symmetric` set to True to draw the tick lines symmetrically around
the invisible center-line.
'''
start_coord = Coordinate(*start_coord)
end_coord = Coordinate(*end_coord)
length = (end_coord - start_coord).magnitude
angle = (end_coord - start_coord).angle
result = [ ]
for i, unit in enumerate(units):
ticks = int(math.ceil(length / unit))
for t in range(ticks):
tick_height = min_tick_height * (i + 1)
if symmetric:
x1, y1 = unit * t, tick_height / 2
x2, y2 = unit * t, -tick_height / 2
else:
x1, y1 = unit * t, 0
x2, y2 = unit * t, -tick_height
tick = line((x1, y1), (x2, y2))
result.append(tick)
g = Group(result)
rotate(g, angle, (0, 0))
offset(g, start_coord)
return g
def arrow(path, headwidth, headheight, filled=False):
'''Returns an arrow shape.
- `path` is a Path object.
- `headwidth` is the width of the arrow head.
- `headheight` is the height of the arrow head.
'''
## make arow head...
r, a = xy_to_polar((path.points[-1] - path.points[-2]))
head = isosceles(headwidth, headheight, filled)
offset(head, (0, -headheight))
rotate(head, a - math.pi / 2, (0, 0))
offset(head, path.points[-1])
return Group([head, path])
def arrow(path, headwidth, headheight, filled=False):
'''Returns an arrow shape.
- `path` is a Path object.
- `headwidth` is the width of the arrow head.
- `headheight` is the height of the arrow head.
'''
## make arow head...
r, a = xy_to_polar((path.points[-1] - path.points[-2]))
head = isosceles(headwidth, headheight, filled)
offset(head, (0, -headheight))
rotate(head, a - math.pi / 2, (0, 0))
offset(head, path.points[-1])
return Group([head, path])
return result
## RUN DEMO CODE
if __name__ == '__main__':
from chiplotle.geometry.core.group import Group
from chiplotle.geometry.transforms.offset import offset
from chiplotle.geometry.transforms.rotate import rotate
from chiplotle.tools import io
#one of each main spiral type
s1 = spiral_archimedean(500, wrapping_constant=1)
s2 = spiral_archimedean(500, wrapping_constant=2, direction="ccw")
offset(s2, (0, -1000))
#these two are long, so we'll rotate them and move them to the side
#of the others
s3 = spiral_archimedean(1800, wrapping_constant=-1, direction="ccw")
rotate(s3, math.pi * 1.5)
offset(s3, (650, 400))
s4 = spiral_archimedean(1500, wrapping_constant=-2, direction="ccw")
rotate(s4, math.pi * .6)
offset(s4, (1000, -1100))
g = Group([s1, s2, s3, s4])
io.view(g)
return result
## RUN DEMO CODE
if __name__ == "__main__":
from chiplotle.geometry.core.group import Group
from chiplotle.geometry.transforms.offset import offset
from chiplotle.geometry.transforms.rotate import rotate
from chiplotle.tools import io
# one of each main spiral type
s1 = spiral_archimedean(500, wrapping_constant=1)
s2 = spiral_archimedean(500, wrapping_constant=2, direction="ccw")
offset(s2, (0, -1000))
# these two are long, so we'll rotate them and move them to the side
# of the others
s3 = spiral_archimedean(1800, wrapping_constant=-1, direction="ccw")
rotate(s3, math.pi * 1.5)
offset(s3, (650, 400))
s4 = spiral_archimedean(1500, wrapping_constant=-2, direction="ccw")
rotate(s4, math.pi * 0.6)
offset(s4, (1000, -1100))
g = Group([s1, s2, s3, s4])
io.view(g)
from chiplotle.geometry.core.transformlock import TransformLock
from chiplotle.geometry.core.shape import _Shape
def lock_group(shapes, lock_transforms):
t = TransformLock(shapes, lock_transforms)
return t
## ~~~~~~~~~~~~~~~~~~~~~~~
if __name__ == '__main__':
from chiplotle.geometry.shapes.square import square
from chiplotle.geometry.core.group import Group
from chiplotle.geometry.transforms.rotate import rotate
from chiplotle.geometry.transforms.offset import offset
from chiplotle import io
import math
r1 = square(100)
r2 = square(150)
l = lock_group([r2], ['rotate'])
g = Group([r1, l])
offset(g, (200, 0))
rotate(g, math.pi / 4)
io.view(g)
from chiplotle.geometry.core.transformlock import TransformLock
from chiplotle.geometry.core.shape import _Shape
def lock_group(shapes, lock_transforms):
t = TransformLock(shapes, lock_transforms)
return t
## ~~~~~~~~~~~~~~~~~~~~~~~
if __name__ == '__main__':
from chiplotle.geometry.shapes.square import square
from chiplotle.geometry.core.group import Group
from chiplotle.geometry.transforms.rotate import rotate
from chiplotle.geometry.transforms.offset import offset
from chiplotle import io
import math
r1 = square(100)
r2 = square(150)
l = lock_group([r2], ['rotate'])
g = Group([r1, l])
offset(g, (200, 0))
rotate(g, math.pi / 4)
io.view(g)
