Drawbot animation with LTR NCND Variable.

LTR_NCND_animation_drawbot_demo.py

# another animation generator
# for NCND fun only
# 2023 letterror.com


# the number of frames for this animation
frames = 25

# margin, in pixels
margin = 20

# the size, it is a square video.
dim = 600

# the name of this font
xvf = "NCNDVF-Regular" 

# cute lil interplation function
def ip(a,b,f):
    return a+f*(b-a)

# this calculates a point size for the number of columns
# that have to fit on the width of the animation.
def colCalc(cols):
    ptwidth = (width()-2*margin)/cols
    return 1000*ptwidth/550

# this calculates the number of columns (see colCalc)
# needed for the text
def maxCols(t):
    lines= t.split('\n')
    lines = [l.replace("~", "") for l in lines]
    return max([len(l) for l in lines])

# this returns a reandom weight for LTR NCNDVF
def varWeight(wght, d = 40):
    return max(min(wght+randint(-d, d), 900),250)

texts = [
    ("awesome-typewriter", "LtrNCND\n|spooky\n|  type\nwriter!", 50),
]

def url():
    with savedState():
        font(xvf)
        fontSize(30)
        fontVariations(wght=800)
        fill(0.8,0,0)
        text("A variable typewriter:\nLearn more: LettError.com/ncnd", (20, 50,))

clrName = "white"
for name, t, tuck_y in texts:
    for count in range(frames+1):
        cols = maxCols(t)
        newPage(dim, dim)
        fill(1)
        rect(0,0,width(),height())
        lc = len(t.split("\n"))+1
        fsz = colCalc(cols)
        factor = count/frames
        fs = FormattedString()
        fs.font(xvf)
        fs.fontSize(fsz)
        fs.lineHeight((height()-2*margin)/(lc))
        fs.openTypeFeatures(ss01=True, lnum=True, zero=True)
        if factor < .5:
            wghtValue = ip(250, 950, 2*factor)
            fs.fontVariations(wght=ip(250, 950, 2*factor))
        else:
            wghtValue = ip(250, 950, 2*(1-factor))
            fs.fontVariations(wght=ip(250, 950, 2*(1-factor)))
        for l in t.split("\n"):
            fs.fill(0)
            for c in l:
                cw = varWeight(wghtValue)
                fs.fontVariations(wght=cw)
                fs.append(c)
            fs.append("\n")
        rc = (margin, margin, width()-2*margin, height()-2*margin-tuck_y)
        textBox(fs, rc)
        url()

    saveImage(f"LTR_NCND_{name}_{clrName}.mp4")