Python utilities to facilitate working with shapely (shape creation, rasterization, plotting)

• Free software: BSD license
• Documentation: http://shapelib.rtfd.org.

• provides easy methods to interact with shapely and other related libraries
• easy creation of complex geometric shapes
• geometric operations:
  • extend line
  • extrapolate points
  • generate perpendicular lines
  • calculate angles
  • find the nearest points between two geometries
• rasterization
  • convert a shape to an array
  • convert a shape to a picture
  • plot a complex shape with matplotlib

shapelib started as a set of utilities to build geometric shapes as part of acoustic simulations (walls, ducts, tubes). It proved to be useful outside of this specific domain.

Rotate a geometry:

import shapelib
l = shapelib.line(0, 0, 1, 1)
rot = shapelib.rotate(l, 90)

Find the angle of a tangent at a point:

import shapelib
circ = shapelib.circle(1, 1, 1)
radians = shapelib.angle_at(circ, (1, 0))
print(math.degrees(radians))
# 270

Rasterize a geometry to an 2D array:

import shapelib
circ = shapelib.circle(1, 1, 1)
# convert to a 2D matrix, 300 pixels pro unit
img = shapelib.rasterize(circ, 300)

See the docs