def get_shape_intersections(shape1, shape2):
'''Returns a generator of all intersecting points found in the
given shapes.'''
if not isinstance(shape1, _Shape) or not isinstance(shape2, _Shape):
raise TypeError
for i in range(len(shape1.points)-1):
for j in range(len(shape2.points)-1):
intersection = get_line_intersection(
line(shape1.points[i], shape1.points[i+1]),
line(shape2.points[j], shape2.points[j+1]))
if intersection:
yield intersection
def radial_ruler(radius,
start_angle,
end_angle,
units,
min_tick_height,
symmetric=True):
length = end_angle - start_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:
r1, a1 = tick_height / 2, unit * t + start_angle
r2, a2 = -tick_height / 2, unit * t + start_angle
else:
r1, a1 = 0, unit * t + start_angle
r2, a2 = -tick_height, unit * t + start_angle
xy1 = p2c(Coordinate(r1, a1) + Coordinate(radius, 0))
xy2 = p2c(Coordinate(r2, a2) + Coordinate(radius, 0))
tick = line(xy1, xy2)
result.append(tick)
return Group(result)
def radial_ruler(radius,
start_angle,
end_angle,
units,
min_tick_height,
symmetric=True):
length = end_angle - start_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:
r1, a1 = tick_height / 2, unit * t + start_angle
r2, a2 = -tick_height / 2, unit * t + start_angle
else:
r1, a1 = 0, unit * t + start_angle
r2, a2 = -tick_height, unit * t + start_angle
xy1 = p2c(Coordinate(r1, a1) + Coordinate(radius, 0))
xy2 = p2c(Coordinate(r2, a2) + Coordinate(radius, 0))
tick = line(xy1, xy2)
result.append(tick)
return Group(result)
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 grid(width, height, width_divisions,height_divisions):
'''Rectangular grid.
- `width` : ``int`` or ``float``, width of the rectangle.
- `height` : ``int`` or ``float``, height of the rectangle.
- `width_divisions` : ``int``, number of horizontal equidistant partitions.
- `height_divisions` : ``int``, number of vertical equidistant partitions.
'''
ul_x = width
bl_x = ul_x
ur_x = ul_x + width
ul_y = height
ur_y = ul_y
bl_y = ul_y - height
x_step_size = width / width_divisions
y_step_size = height / height_divisions
g = Group()
## add horizontal lines
for i in range(height_divisions + 1):
step_y = y_step_size * i
l = line((ul_x, ul_y - step_y), (ur_x, ur_y - step_y))
g.append(l)
## add vertical lines
for i in range(width_divisions + 1):
step_x = x_step_size * i
l = line((ul_x + step_x, ul_y), (bl_x + step_x, bl_y))
g.append(l)
return g
def grid(width, height, width_divisions, height_divisions):
'''Rectangular grid.
- `width` : ``int`` or ``float``, width of the rectangle.
- `height` : ``int`` or ``float``, height of the rectangle.
- `width_divisions` : ``int``, number of horizontal equidistant partitions.
- `height_divisions` : ``int``, number of vertical equidistant partitions.
'''
ul_x = width
bl_x = ul_x
ur_x = ul_x + width
ul_y = height
ur_y = ul_y
bl_y = ul_y - height
x_step_size = width / width_divisions
y_step_size = height / height_divisions
g = Group()
## add horizontal lines
for i in range(height_divisions + 1):
step_y = y_step_size * i
l = line((ul_x, ul_y - step_y), (ur_x, ur_y - step_y))
g.append(l)
## add vertical lines
for i in range(width_divisions + 1):
step_x = x_step_size * i
l = line((ul_x + step_x, ul_y), (bl_x + step_x, bl_y))
g.append(l)
return g
return None
## DEMO
if __name__ == '__main__':
from chiplotle.geometry.shapes.line import line
from chiplotle.geometry.core.group import Group
from chiplotle.tools import io
from random import randrange
#draw a bunch of lines that do not intersect
no_intersections = Group()
line_1 = line([randrange(0, 4000), randrange(0, 4000)],
[randrange(0, 4000), randrange(0, 4000)])
no_intersections.append(line_1)
while len(no_intersections) < 300:
new_line = line([randrange(0, 4000), randrange(0, 4000)],
[randrange(0, 4000), randrange(0, 4000)])
intersection = False
for l in no_intersections:
if get_line_intersection(new_line, l) != None:
intersection = True
break
if intersection == False:
no_intersections.append(new_line)
x = math.cos(theta) * math.pow(math.e, (expansion_rate * theta))
y = math.sin(theta) * math.pow(math.e, (expansion_rate * theta))
if direction == "ccw":
y *= -1.0
spiral_points.append((x, y))
theta += theta_incr
return Path(spiral_points)
## RUN DEMO CODE
if __name__ == "__main__":
from chiplotle.geometry.core.group import Group
from chiplotle.geometry.shapes.line import line
from chiplotle.tools import io
s = spiral_logarithmic()
# add some lines for scale
line_right = line((0, 0), (500, 0))
line_left = line((0, 0), (-500, 0))
line_up = line((0, 0), (0, 500))
line_down = line((0, 0), (0, -500))
g = Group([s, line_right, line_left, line_up, line_down])
io.view(g)
y = math.sin(theta) * math.pow(math.e, (expansion_rate * theta))
if direction == "ccw":
y *= -1.0
spiral_points.append((x, y))
theta += theta_incr
return Path(spiral_points)
## RUN DEMO CODE
if __name__ == '__main__':
from chiplotle.geometry.core.group import Group
from chiplotle.geometry.shapes.line import line
from chiplotle.geometry.transforms.offset import offset
from chiplotle.tools import io
s = spiral_logarithmic()
#add some lines for scale
line_right = line((0,0), (500, 0))
line_left = line((0,0), (-500, 0))
line_up = line((0,0), (0, 500))
line_down = line((0,0), (0, -500))
g = Group([s, line_right, line_left, line_up, line_down])
io.view(g)
