A new version is available:

• The launch time is now at lightning speed!

• Added a new keyword argument center for the rotate(), scale(), and skew() functions.

The optional center argument will make the transformation be centered around the given point:

rotate(20, center=(500, 500)) # rotate around (500, 500)
rect(250, 250, 500, 500)

Just for reference: the extra argument does the same as this example but is a lot more convenient:

# define a center point
centerX, centerY = 500, 500
# translate to that center point
translate(centerX, centerY)
# do the transformation
rotate(20)
# translate back 
translate(-centerX, -centerY)
# draw something
rect(250, 250, 500, 500)

Download and Play!!!

that is possible you can use:

from drawBot.context.tools.gifTools import generateGif

generateGif(gifPaths, destinationPath, frameRates)
# gifPaths: a list of paths to gif files
# destinationPath: a path where to save the animated gif
# frameRates: a list with the same length as the gifPaths of ints in 1/100sec

see https://github.com/typemytype/drawbot/blob/master/drawBot/context/tools/gifTools.py#L11

hope this works!

• Adding bezierPath.expandStroke(width, lineCap="round", lineJoin="round", miterLimit=10) (thanks to Bahman Eslami)

• Improved internal OpenType feature tags setting

• Improved complex formattedString type setting

• Improved alignment with text() and FormattedString

• Added a DrawBot frontend for pip/PyPI to make it super easy to install third-party packages: see menu Python -> Install Python Packages...

  

• Fixed text stroke behavior (but is a breaking change): strokeWidth on text no longer scales with the fontSize

• Removed support for .mov export on 10.15 and up (QTKit is no longer supported there)

• Fixed extracting single frames from .gif files

• Improved setup.py, so drawbot-as-a-module can be easily installed with pip using a github URL

• All test now run on Travis CI (and soon also on GitHub Actions)

• Removed Python 2 code

• Many small issues were fixed

• Jumping to python 3.7

  If you use external packages you will need to install them for python 3.7. If you don't have python 3.7 installed you will need to do that first.

• Improved syntax highlighting for python 3

• Fallback fonts are also used in a svg context.

• listNamedInstances() lists all named instances for a variable font.

• BezierPath objects have bezierPath.line(pt1, pt2) and bezierPath.polygon(pt1, pt2, ...) methods.

• Update internal packages!

you could save the result to disk and open the result in an specified app with:

from drawBot import *

fill(random(), random(), random())
rect(10, 10, 100, 100)

path = "~/Desktop/test.pdf"
saveImage("~/Desktop/test.pdf")

import os
os.system(f"open --background -a Preview {path}")

I understand the confusion

a much better explanation:

The created arc is defined by a circle inscribed inside the angle specified by three points: the current point, the fromPoint parameter, and the toPoint parameter (in that order). The arc itself lies on the perimeter of the circle, whose radius is specified by the radius parameter. The arc is drawn between the two points of the circle that are tangent to the two legs of the angle.
The arc usually does not contain the points in the fromPoint and toPoint parameters. If the starting point of the arc does not coincide with the current point, a line is drawn between the two points. The starting point of the arc lies on the line defined by the current point and the fromPoint parameter.

https://developer.apple.com/documentation/appkit/nsbezierpath/1520737-appendbezierpathwitharcfrompoint

I will adjust the drawBot documentation

This is savedState() http://www.drawbot.com/content/canvas/state.html#drawBot.savedState

with savedState():
    # do something

This is more readable and clearer then wrapping code inside a save / restore statement.

For beginners there is not such a big difference:

Strings

All strings are unicode string, so no converting back and forth, but this is actually the best thing!!

print

print('hello world') requires brackets ( and )

divisions

Divisions are always floats so no more rounding, this is also a good thing: 1/3-> 0.333333 instead of 0

You keep the old behaviour with 1//3

If you dive deeper:

dictionaries

dict.keys(), dict.values(), dict.items() are not a lists anymore

Looping (a for loop or a while loop) over a dictionary and changing content of that dictionary is tricky:

for key in list(myDict.keys()):
    myDict[key] = "changed" + myDict[key]

There is of course more

• Python2 or Python3
• What's New
• google it

@thundernixon ssssht py3.6

there are plainly of references in generative art, going from artist like Sol Lewit to graphic designers Juriaan Schrofer and many more.

good luck!!

pageBot can do this...

now you are going in both direction with in increasing speed, while when you go back you to start fast and end slow:

def linear(factor):
    return factor

def easeIn(factor):
    return factor*factor

def easeOut(factor):
    return factor * (2-factor)


steps = 100

blockWidth = width() / steps


for func in [linear, easeIn, easeOut]:
    newPage(2000, 1000)
    for i in range(steps):
        factor = i / (steps-1)
        factor = func(factor)
        rect(0, 0, blockWidth, height() * factor)    
        translate(blockWidth, 0)    
    
    for i in range(steps):
        factor = i / (steps-1)
        # go the other way around
        factor = func(1 - factor)
        rect(0, 0, blockWidth, height() * factor)    
        translate(blockWidth, 0)   

I don't know why but my wild guess is it has todo with drawing ovals at more extreme w, h ratios, when the points are on the extremes you will need a pushing point in the middle to nice curve back.

@gferreira you method only works for circles...

the drawBot RoboFont extension has points on the extremes, cause the context is type... see https://github.com/typemytype/drawBotRoboFontExtension/blob/master/DrawBot.roboFontExt/lib/glyphContext.py#L23

see the big difference when the oval is getting thinner...

def straightOval(x, y, w, h):
        c = 0.55
        hx = w * c * .5
        hy = h * c * .5
        path = BezierPath()
        path.moveTo((x + w * .5, y))
        path.curveTo((x + w * .5 + hx, y), (x + w, y + h * .5 - hy), (x + w, y + h * .5))
        path.curveTo((x + w, y + h * .5 + hy), (x + w * .5 + hx, y + h), (x + w * .5, y + h))
        path.curveTo((x + w * .5 - hx, y + h), (x, y + h * .5 + hy), (x, y + h * .5))
        path.curveTo((x, y + h * .5 - hy), (x + w * .5 - hx, y), (x + w * .5, y))
        path.closePath()
        drawPath(path)
        

x, y, w, h = 10, 10, 8.0, 146.0


oval(x, y, w, h)
straightOval(x + w + 10, y, w, h)

you can get point labels in RoboFont with:

glyph = CurrentGlyph()

for contour in glyph:
    for point in contour.points:
        print(point.labels)

I dont know Glyhps but you can always do this in RoboFont with point labels!!!

you can use the FlattenPen from fontPens.

from fontPens.flattenPen import FlattenPen

# create an empty path
dest = BezierPath()
# create flatten pen that will draw into the dest bezierPath
pen = FlattenPen(dest, approximateSegmentLength=30, segmentLines=True)

# draw into the flatten pen
pen.moveTo((100, 100))
pen.curveTo((100, 150), (150, 200), (200, 200))
pen.endPath()

# create an other path
path = BezierPath()
# draw an oval
path.oval(200, 200, 200, 200)
# draw the path with oval in the flatten pen
path.drawToPen(pen)

# set stroke and fill
stroke(0)
fill(None)
# draw the dest
drawPath(dest)

to learn more about pens and how to use them see https://robofont.com/documentation/how-tos/using-pens/

this should be resolved in the latest update!!!

two things:

why generate a binary and read the the binary back in? see f1.generate("otfcff", "f1.otf")

Give you new font a unique name based on the interp_factor. The font familyName and styleName makes up the postScriptName which has to be unique to set a font in drawBot (and everywhere else). In your case the font familyName and styleName will be "None" "None". This is not good...

DrawBot has an abstract stack of "actions" which can be applied on different contexts. One context is your output: an animated gif. And there is always a drawBot context to create the preview pdf data.

Using drawBot from the module helps in this case as @gferreira suggested.

there are several options:

• font.interpolate will returns a ufo
• a designspace document with a given location will also returns a ufo, use mutatorMath
• generate a variable font

Generating variable fonts from design spaces is not difficult: in RoboFont you can use the Batch extension. In DrawBot you can pip install ufo2ft to generate a var font and use it inside your type setting.

good luck!