# robothon06
# rasterise the shape in glyph "A"
# and draw boxes in a new glyph named "A.silly"
#

from robofab.world import CurrentFont, CurrentGlyph

sourceGlyph = "a"

f = CurrentFont()
source = f[sourceGlyph]

# find out how big the shape is from the glyph.box attribute
xMin, yMin, xMax, yMax = source.box

# create a new glyph
dest = f.newGlyph(sourceGlyph+".silly")
dest.width = source.width

# get a pen to draw in the new glyph
myPen = dest.getPen()

# a function which draws a rectangle at a specified place
def drawRect(pen, x, y, size=50):
	pen.moveTo((x-.5*size, y-.5*size))
	pen.lineTo((x+.5*size, y-.5*size))
	pen.lineTo((x+.5*size, y+.5*size))
	pen.lineTo((x-.5*size, y+.5*size))
	pen.closePath()

# the size of the raster unit
resolution = 30

# draw from top to bottom
yValues = range(yMin, yMax, resolution)
yValues.reverse()

# go for it!
for y in yValues:
	for x in range(xMin, xMax, resolution):
		# check the source glyph is white or black at x,y
		if source.pointInside((x, y)):
			drawRect(myPen, x, y, resolution-5)
	# update for each line if you like the animation
	# otherwise move the update() out of the loop
	dest.update()