Function pbis

recipes/Python/580806_How_Create_PDF_Caustic/recipe-580806.py:24–25

(a)

    return(math.cos(a), math.sin(a))

def pbis(a):                 # end point of one sun ray
    return(math.cos(3*a - math.pi), (math.sin(3*a - math.pi)))

# create new PDF with an empty square format page
doc = fitz.open()