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!!

indeed, letters are collected into glyph runs with the same drawing attributes, so if you change a thing (like fill color) then you will get a box for each letter.

good luck!

I don't know what you are trying to do but textBoxCharacterBounds is really handy to retrieve typesetted information.

help(textBoxCharacterBounds)


t = FormattedString()
t.fontSize(50)
t += "hello"

t.font("Times")
t.fill(1, 1, 0)
t += " world"
t.font("Times-Bold")
t.fill(1, 0, 0)
t += " fooj"

textBox(t, (0, 0, 400, 400))

textRects = textBoxCharacterBounds(t, (0, 400, 400, 400))


for textRect in textRects:
    x, y, w, h = textRect.bounds
    
    fill(random(), random(), random(), .3)    
    rect(x, y - textRect.baselineOffset, w, h)
    
    text(textRect.formattedSubString, (x, y))

moving this into a github issue

follow up here: https://github.com/typemytype/drawbot/issues/417

this would be handy

how to add it:

Create a custom NSLayoutManager for the code editor and overwrite drawGlyphsForGlyphRange_atPoint_ and draw something like a rainbow or dots or ...

also see https://github.com/coteditor/CotEditor/blob/89afb53f207309bfee2b1070ada3f258e1e0d6ef/CotEditor/Sources/LayoutManager.swift#L312

@pi said in Is it possible do this processing.gif in drawbot?:

@frederik: Why is it 0.38?

the handle of the off curve is 38% of the distance between the oncurve points, that seems to be generating nice curves

an other solution!

# amount of corners, 6 will create a hexagon
corners = 6
# the radius of the circle
radius = 100
# amount of frames
frames = 24
# calculate the step in radians of each corner
angleStep = pi * 2 / corners
# calculate the distance between each point on the circle
# based on the cos, sin of the angle the opposite 'c' can be
# calculated with pythagoras 
distance = sqrt((radius - cos(angleStep) * radius) ** 2 + (sin(angleStep) * radius) ** 2)
# calculate the offcurve handle length
offCurveLength = distance * 0.38
# the extremes of factors we would like to use
minFactor = .3
maxFactor = 2 
# start the loop
for i in range(frames):
    # calculate a factor and normalize so it goes from 0 -> 1 -> 0
    # to create a loop
    factor = i / (frames) * 2
    if factor > 1:
        factor = 2 - factor
    # interpolate the factor with our min max settings
    factor = minFactor + (maxFactor - minFactor) * factor
    # create a new page
    newPage(radius * 4, radius * 4)
    # draw a white background (gifs dont have an alpha value)
    with savedState():
        fill(1)
        rect(0, 0, width(), height())
    # translate to the middle
    translate(width() / 2, height() / 2)
    # create a pen
    pen = BezierPath()
    # use the pen as a point pen
    # so we can just add point instead of segments
    pen.beginPath()
    # start a loop over all corners
    for i in range(corners):
        # get the angle of each corner
        angle = angleStep * i    
        # get the x, y position based on the angle and radius    
        x = cos(angle) * radius
        y = sin(angle) * radius            
        # get the off curces based on the hooked angle (+90°) 
        # and multiply by the factor         
        offx1 = (x + cos(angle + pi / 2) * offCurveLength) * factor
        offy1 = (y + sin(angle + pi / 2) * offCurveLength) * factor
            
        offx2 = (x - cos(angle + pi / 2) * offCurveLength) * factor
        offy2 = (y - sin(angle + pi / 2) * offCurveLength) * factor
        # add the point to the point pen path
        pen.addPoint((offx2, offy2))
        pen.addPoint((x, y), segmentType="curve")
        pen.addPoint((offx1, offy1))        
    # tell the path the drawing is done
    pen.endPath()
    # draw the path
    stroke(1, 0, 1, 1)
    strokeWidth(10)
    fill(None)
    drawPath(pen)
# save the gif
saveImage("circleHex.gif")

cool !

cool, thanks for sharing!

the resulting animated gif

hope this example is clear enough!

# path to an image
path = 'https://github.com/typemytype/drawbot/raw/master/docs/content/assets/drawBot.jpg'
# get the width and height of the image
canvasWidth, canvasHeight = imageSize(path)
# amount of frames
frameCount = 24
# start the loop
for frame in range(frameCount):
    # calculate a factor, number between 0 - 1
    # going from 0 - 1 - 0
    frameFactor = frame / (frameCount) * 2        
    if frameFactor > 1:
       frameFactor = 2 - frameFactor 
    # create a new page, based on the image size
    newPage(canvasWidth, canvasHeight)
    # set frame duration in second only when the full image is shown
    if frameFactor == 1:
        frameDuration(1)
    else:
        frameDuration(.05)
    
    # easin
    frameFactor = frameFactor * frameFactor
    # translate to the middle
    translate(canvasWidth/2, canvasHeight/2)
    # scale from the middle
    scale(frameFactor)
    # rotate from the middle
    rotate(360 * frameFactor * 10)
    # translate back away from the middle
    translate(-canvasWidth/2, -canvasHeight/2)
    # draw the image
    image(path, (0, 0))
# save as gif
saveImage("testImage.gif")