Just think, in the future we will be able to write transform values
out to frame buffers and compare them in a fragment shader using a GPU
on your video card! It will be 10 times faster! ;)
On 1/12/07, François Painchaud <francois.painchaud(at)sympatico.ca> wrote:
Le 2007-01-12 18:26, Joe Laffey a écrit :
On Fri, 12 Jan 2007, Bernard Lebel wrote:
def compare4( oT1, oT2, oMatrixA, oMatrixB ):
for i in range(0, 4):
for j in range(0, 4):
if abs( oMatrixA.Value(i, j) - oMatrixB.Value(i,j) ) < 0.0001:
return False
return True
Now if your are REALLY trying to make things fast, for something so short as
16 elements you could easily unroll the loops into a series of if statements
like in the other functions. This avoids the (very slight) overhead of
setting up the loop, and reading from / writing to the iterator variables...
Excellent suggestion! This way, you can order the "if" statements to first
test the values that will most likely change in your homogeneous matrix: the
3 (or 4) translation values, then the 6 rotation/scaling values, then the
rest.
François
--
Ben Barker
Character TD
CafeFX
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