Rasterize Page for Drawbot, Fill Raster with Instances of Object

rasterOfThings.py

import time
from random import randrange

# create new page
newPage('A3Landscape')

# set margins for RISO
margin_x = 23
margin_y = 37

# set number of fields
NUM_X = 12
NUM_Y = 8

class THING(object):
    def __init__(self, x, y, w, h, r):
        self.x = x
        self.y = y
        self.w = w
        self.h = h
        self.rad = r
    def drawthings(self):
        oval(self.x + (self.w-self.rad)/2, self.y + (self.h-self.rad)/2, self.rad, self.rad)

def singleField(w, h, num_x, num_y):
    offset_x = w % num_x / 2
    offset_y = h % num_y / 2
    w_col = int((w - offset_x * 2) / num_x)
    h_hor = int((h - offset_y * 2) / num_y)
    return { "width": w_col, "height": h_hor, "offset_x": offset_x, "offset_y": offset_y }

# get properties of single field as object
props = singleField(width() - 2 * margin_x, height() - 2 * margin_y, NUM_X, NUM_Y)

raster = []

# generate lists containing indexes of raster fields
for row in range(NUM_Y):
    raster.append([])
    for col in range(NUM_X):
        raster[row].append([row, col])
print raster

things = []

for r in range(0, len(raster)):
    for f in range(0, len(raster[r])):
        # set up values used as arguments for the objects
        x = f * props["width"] + props["offset_x"] + margin_x
        y = r * props["height"] + props["offset_y"] + margin_y
        w = props["width"]
        h = props["height"]
        # differing radii
        #rad = randrange(int(min(w, h) * .5), int(min(w, h) * .8))
        # equal radii
        rad = int(min(w, h)*0.7)
        things.append(THING(x, y, w, h, rad))

for c in things:
    stroke(0)
    fill(None)
    c.drawthings()
    
timestr = time.strftime("%Y%m%d-%H%M%S")
saveImage(["~/Desktop/things_" + timestr + ".pdf"])