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Topic: i still don't understand push() and pop() (Read 360 times) |
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buraque
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i still don't understand push() and pop()
« on: Feb 10th, 2005, 8:34am » |
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Pardon my lack of intelligence for I still can't figure out the role of push() and pop(). I read all examples and tutorials and threads, but couldn't find the fundamental answer to the question why. Is it something for matrix equations? Please help me.
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for (IQ=0; IQ<300; IQ++) {
read();
writeProcessing();
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fjen
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Re: i still don't understand push() and pop()
« Reply #1 on: Feb 10th, 2005, 11:06am » |
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the idea behind it has to do with matrix math, yes.
think of it as preserving the current state you're in (location, rotation, scale). each pushpop could be considered as a new branch in a tree (see ben's anmone), where each itself can have many branches.
in keeping it you kind of get a "fresh start" after every push(), like setting a new origin in a 3D-application at where you currently are.
-- starting from point a --
push()
turn to the left
go 10 steps forward
-- we are at point b --
push()
turn to the right
go 10 steps forward
-- we are at point c --
do something ...
pop()
-- now we're back at point b --
pop()
-- now you're back at point a --
does this make it any clearer? .. sense?
couple of beer to much last night, gnnnn ...
/F
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buraque
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Re: i still don't understand push() and pop()
« Reply #2 on: Feb 11th, 2005, 12:15am » |
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Thanks a lot. I got the idea.
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for (IQ=0; IQ<300; IQ++) {
read();
writeProcessing();
}
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