import pyqplot as qp

import numpy as np

qp.figure('endgroup', 3, 3)

qp.pen('b', 1)

qp.plot([0, 0, 1], [1, 0, 0])

# Grouping creates a bounding box

qp.group()

qp.pen('r')

qp.at(.3, .5)

qp.text('Hello world')

qp.at(.5, .5)

qp.text('More text', dy=15)

qp.at(.7, .5)

qp.text('And a third line', dy=30)

qp.endgroup()

# Leave bread crumbs at four corners

qp.at('left', 'top', id='A')

qp.at('right', 'top', id='B')

qp.at('left', 'bottom', id='C')

qp.at('right', 'bottom', id='D')

# Use them to draw lines

qp.gline([[qp.At('C'), qp.RelPaper(-5,5)], [qp.At('A'), qp.RelPaper(-5,-5)]])

qp.gline([[qp.At('B'), qp.RelPaper(5,-5)], [qp.At('D'), qp.RelPaper(5,5)]])