Modifications to Scheme art to run faster

converttoppm.py

import struct


with open('test.ppm', 'wb') as ppm_file:
	ppm_file.write("P6\n".encode('ascii'))
	with open('test.txt', 'r') as out:
		width = int(out.readline())
		height = int(out.readline())
		ppm_file.write((str(width) + ' ' + str(height) + '\n').encode('ascii'))
		ppm_file.write('255\n'.encode('ascii'))
		ppm = []
		for i in range(height):
			ppm_line = []
			for j in range(width):
				r = int(float(out.readline()))
				g = int(float(out.readline()))
				b = int(float(out.readline()))
				ppm_line.append(struct.pack('BBB', r, g, b))
			ppm.append(b''.join(ppm_line[::-1]))
		ppm_file.write(b''.join(ppm[::-1]))

overrides.scm

(define (screen_width)
  600
)

(define (screen_height)
  600
)

(define (rgb r g b)
  (newColor r g b)
)

(define (pixel x y c)
  (print (floor (* (color_r c) 255)))
  (print (floor (* (color_g c) 255)))
  (print (floor (* (color_b c) 255)))
)

test.sh

csc contest.scm && ./contest > test.txt && python outtoppm.py && convert test.ppm test.png && rm test.ppm test.txt