Messages

1

General / Re: Is " <T> " a convention always referring to Template?

« on: January 23, 2015, 08:20:41 am »

Thank you.
I'm new enough to both C++ and SFML that I don't always realise where I should first place a question about some code I don't understand.
Thanks for helping me.
OF

2

General / Is " <T> " a convention always referring to Template?

« on: January 22, 2015, 10:40:18 am »

Hi

Just to be clear on something as I read through my lessons: When Capital T (e.g. in <T> ) is used, is that an informal or even a formal 'reserved word' referring to Templates?

OF

3

General / Re: Need definition for Translate

« on: January 19, 2015, 09:20:23 am »

It sure has!  I'm glad to see some of that old math, I remember wondering at the time how I'd ever get a chance to use it.  It looked like fun at the time but the classroom wasn't and I forgot most of it due to daily un-use.  Forty years later, here we all are again.
I've been keeping this SFML textbook central, and as I come across something on which I'm unclear I head out to get more information on it.  That 'translate' thing was a special snag.  Thanks for taking the time.

Cheers
OF

4

General / Re: Need definition for Translate

« on: January 19, 2015, 08:52:35 am »

Thanks!

Yes, I tried 'Googling' it, using "C++ translate", I didn't recognise it as a Math feature.
The Wikipedia article at http://en.wikipedia.org/wiki/Translation_unit_%28programming%29  didn't lead to my sussing specifically that 'translate' means to move.  I saw scale(), rotate(), move(), mentioned elsewhere in the SFML documentation so I thought 'move' wasn't what translate() meant.

Anyway, thanks for the help!
OF

5

General / Re: Need definition for Translate

« on: January 19, 2015, 08:37:26 am »

Hi.  Thanks for writing.
Yes, this is one of the first things I found when I was looking for an explanation of what it is and what it does.
>>>
Transform& sf::Transform::translate(float x, float y)       

Combine the current transform with a translation.

This function returns a reference to *this, so that calls can be chained.
sf::Transform transform;
transform.translate(100, 200).rotate(45);

Parameters
    x   Offset to apply on X axis
    y   Offset to apply on Y axis

Returns
    Reference to *this

See also
    rotate, scale
<<<

So it's used when rotating and scaling, then.  If that's the explanation and there isn't any other, then thanks for pointing me back to this.  I guess the way to actually apply it will finally click for me when I've seen it used enough times that I can cross-reference the context(s) a little bit.

Thanks again
OF

6

General / Need definition for Translate

« on: January 19, 2015, 06:06:38 am »

Hi
I can't find the introductory definition for 'Translate' in the context of Transform.
I see many references to it, e.g.

          sf::Transform t;
          t.translate(10, 100);

But I'm not 'getting' it.  What does it do?  Does it add a value to a value, does it move something, is it needed for calculating other Transform functions such as rotate() or scale(), without which those functions could not work?  I started back at the main SFML page, opened every tutorial category until my search found the word, but even there, in the first mention of 'translate', I saw only a reference to it, not an actual explanation for it.

Thanks to whomever can bring me up to speed on this.
OF