Re: [pygame] Numpy slower than Numeric

[Kamilche <kamilche@xxxxxxxxxxxx>]

Lenard Lindstrom wrote:
> Check out the types of array and alphaarray in TestNumpy(). Very 
> informative. They are both Numeric arrays. All that is accomplished is 
> that numpy.clip is called on one. It probably just treats it as an 
> iterable.

Interesting. If I convert to numpy arrays specifically however, I get an 
error on 'pygame.surfarray.blit_array' of "TypeError: argument 2 must be 
array, not numpy.ndarray" This error disappears when I convert the numpy 
array back to a Numeric array before blitting tho.

So - what does this mean for Pygame? It appears to me there is no good 
reason to use numpy, if you have to convert to/from Numeric arrays to 
get it to work right anyway.

--Kamilche

def TestNumpy():
    global pic2
    pic2 = GetPic()
    print 'numpy version: %s' % numpy.__version__
    array = numpy.array(pygame.surfarray.pixels3d(pic2).astype(numpy.int))
    alphaarray = 
numpy.array(pygame.surfarray.pixels_alpha(pic).astype(numpy.unsignedinteger))
    starttime = time.time()
    for i in range(10):
        array[:, :] = numpy.clip(array + [20, 0, 0], 0, 255)
        numericarray = Numeric.array(array).astype(Numeric.Int)
        pygame.surfarray.blit_array(pic2, numericarray)
        numericarray = Numeric.array(alphaarray).astype(Numeric.UInt8)
        pygame.surfarray.pixels_alpha(pic2)[:, :] = numericarray
        Update()
    print 'numpy time:   %f seconds' % (time.time() - starttime)