Rectangle

The Rectangle class draws a rectangle.

There is also a rectangle function that just creates a rectangle as a new path.

Rectangle class methods

The Rectangle class inherits add, fill, stroke, fill_stroke, path, clip and other methods from Shape.

It has an additional method:

of_corner_size

of_corner_size

Creates a rectangle based on the position and size.

of_corner_size(corner, width, height)

Parameter	Type	Description
corner	(number, number)	A tuple of two numbers, giving the (x, y) position of the top left corner.
width	number	The width.
height	number	The height.

rectangle function

Adds a rectangle as a new path, without the need to create a Rectangle object in code.

rectangle(ctx, corner, width, height)

Parameter	Type	Description
ctx	Context	The Pycairo Context to draw to
corner	(number, number)	A tuple of two numbers, giving the (x, y) position of the top left corner.
width	number	The width.
height	number	The height.

Example

Here is some example code that draws rectangles using the class and the utility function. The full code can be found on github.

from generativepy.drawing import make_image, setup
from generativepy.color import Color
from generativepy.geometry import Rectangle, rectangle

'''
Create rectangles using the geometry module.
'''

def draw(ctx, width, height, frame_no, frame_count):
    setup(ctx, width, height, width=5, background=Color(0.8))

    # The rectangle function is a convenience function that adds a rectangle as a new the path.
    # You can fill or stroke it as you wish.
    rectangle(ctx, (1, 1), 1, 1.2)
    ctx.set_source_rgba(*Color(1, 0, 0))
    ctx.fill()

    # Rectangle objects can be filled, stroked, filled and stroked.
    Rectangle(ctx).of_corner_size((3, 1), 1, 1.2).fill(Color(0, .5, 0))
    Rectangle(ctx).of_corner_size((1, 3), 1.2, 1).stroke(Color(0, .5, 0), 0.1)
    Rectangle(ctx).of_corner_size((3, 3), 1.2, 1).fill_stroke(Color(0, 0, 1), Color(0), 0.2)

make_image("/tmp/geometry-rectangles.png", draw, 500, 500)

Rectangle

Rectangle class methods

of_corner_size

rectangle function

Example

generativepy

See also

Links