Steven D'Aprano wrote:
> On Fri, 30 Mar 2007 02:04:45 -0700, DE wrote:
>
>> Hello,
>>
>> Here is what I do in C++ and can not right now in python :
>>
>> pushMatrix()
>> {
>> drawStuff();
>>
>> pushMatrix();
>> {
>> drawSomeOtherStuff()
>> }
>> popMatrix();
>> }
>> popMatrix();
>>
>> The curly brackets have no functional meaning
>> but increase the readability significantly.
>
> I don't understand why you are indenting
> the function calls. What does the
> indentation and spacing signify?
pushMatrix() pushes a transformation matrix onto the stack of transformation
matrices. The drawing functions draw inside this context of transformations.
popMatrix() pops the last transformation matrix. For example, one could push a
rotation matrix that rotates the coordinate system 90 degrees from horizontal.
drawStuff() might draw some text; usually this would be horizontal, but in the
context of the transformation, it will ultimately be drawn vertically.
As others have mentioned, this is a perfectly good application of Python 2.5's
"with" statement and its context managers. The indentation is meaningful and
useful.
> Some people
> have a strange
> idea of
> "increase
> readability".
Please contain the snark. You didn't understand why someone might want this, and
that's fine. But please wait until you get a response before assuming that there
could be no good reason for wanting this.
--
Robert Kern
"I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it had
an underlying truth."
-- Umberto Eco
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