googlo
11-12-2002, 04:05 PM
I've been learning Maxscript recently and started a little project but noticed that with certain values entered my script wasn't behaving predictably.
For some reason during loop expression testing, for certain values, the loop will exit out prematurely with certain step values, almost as if internally Max is rounding wrong or something.
Here's an example:
when I test this script
(
local umin=0.0
local umax=4.0;
local udiv=10.0;
local ustep=umax/udiv;
local uloopmax=0;
for u=umin to umax by ustep do
(
uloopmax+=1; print ("u=" + (u as string));
)
print ("uloopmax=" + (uloopmax as string));
)
Max gives me this:
"u=0.0"
"u=0.4"
"u=0.8"
"u=1.2"
"u=1.6"
"u=2.0"
"u=2.4"
"u=2.8"
"u=3.2"
"u=3.6"
"uloopmax=10"
"uloopmax=10"
OK
notice how 'u' doesn't complete it's iteration to 4.0?
now, when I substitute 5.0 in place of 4.0 for the variable umax, it does iterate all the way through! see..
"u=0.0"
"u=0.5"
"u=1.0"
"u=1.5"
"u=2.0"
"u=2.5"
"u=3.0"
"u=3.5"
"u=4.0"
"u=4.5"
"u=5.0"
"uloopmax=11"
"uloopmax=11"
OK
This kind of thing will happen with different numbers for umax, sometimes it works other times it doesn't. At first I though that maybe it was a rounding problem, but that can't be the case because like the values used above, they aren't repeating decimals. They are perfect.
So I wonder what is going on? I can't complete my script with this kind of behaviour. And it makes me want to give up scripting really if maxsccript is this buggy or unpredictable. How is anyone supposed to work with that? I hope I'm missing something!
For some reason during loop expression testing, for certain values, the loop will exit out prematurely with certain step values, almost as if internally Max is rounding wrong or something.
Here's an example:
when I test this script
(
local umin=0.0
local umax=4.0;
local udiv=10.0;
local ustep=umax/udiv;
local uloopmax=0;
for u=umin to umax by ustep do
(
uloopmax+=1; print ("u=" + (u as string));
)
print ("uloopmax=" + (uloopmax as string));
)
Max gives me this:
"u=0.0"
"u=0.4"
"u=0.8"
"u=1.2"
"u=1.6"
"u=2.0"
"u=2.4"
"u=2.8"
"u=3.2"
"u=3.6"
"uloopmax=10"
"uloopmax=10"
OK
notice how 'u' doesn't complete it's iteration to 4.0?
now, when I substitute 5.0 in place of 4.0 for the variable umax, it does iterate all the way through! see..
"u=0.0"
"u=0.5"
"u=1.0"
"u=1.5"
"u=2.0"
"u=2.5"
"u=3.0"
"u=3.5"
"u=4.0"
"u=4.5"
"u=5.0"
"uloopmax=11"
"uloopmax=11"
OK
This kind of thing will happen with different numbers for umax, sometimes it works other times it doesn't. At first I though that maybe it was a rounding problem, but that can't be the case because like the values used above, they aren't repeating decimals. They are perfect.
So I wonder what is going on? I can't complete my script with this kind of behaviour. And it makes me want to give up scripting really if maxsccript is this buggy or unpredictable. How is anyone supposed to work with that? I hope I'm missing something!