Library

The unit vector (0, 1).

Useful for creating n-gons, e.g.:

using PenPlots

expect = [
    [-1, 0],
    [0, -1],
    [1, 0],
    [0, 1],
]

isapprox(expect, [frac_rotation(i/4) * unitvec for i in 1:4])

# output

true

A pair of Points representing a rectangle.

Represents a layer of a plot.

A "layer" is a full pass of one pen. A layer has an associated color which is used for previewing the plot in the SVG export, but the color is not used by the plotting software.

An array of paths. Corresponds one-to-one with a layer in a plot.

A 1-dimensional array of Points.

A plot, consisting of one or more layers.

Constructed with:

PenPlot(layers...)

Construct a pen plot consisting of the given layers.

Layers may be:

• Layer objects
• MultiPath objects
• Pair{String, MultiPath} objects, where the string becomes the name of the layer.

Compute the center of an Extent as a Point.

Compute an extent which encompasses the given two Extents.

degree_rotation(deg)

Create a rotation matrix for the angle given in degrees.

Compute an extent which encompasses the given MultiPath.

Compute an extent which encompasses the given Layer.

Compute an extent which encompasses the given Path.

Compute an extent which encompasses the given PenPlot.

frac_rotation(frac)

Create a rotation matrix for the angle given as a fraction, i.e. 1.0 represents a full rotation and 0.5 a half rotation.

perlin_noise(control_points, point)

Compute the noise gradient for the given point, given a grid of control points.

point_matrix(xs, ys)

Generate a matrix by producing Points for the cartesian product of the vectors of x and y values given. The resulting matrix will have as many columns as entries of xs, and as many rows as values of ys.

radian_rotation(rad)

Create a rotation matrix for the angle given in radians.

random_vector_matrix([rng,] rows, cols)

Produce a matrix with the given number of rows and columns, in which every entry is a random unit vector. If provided, the given random number generator is used to determine the vectors.

to_path_string(path)

Returns SVG path syntax for the given path.

to_svg(plot)

Returns an SVG representation of the given plot as a string.