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Re: Trying to learn OOP (for the MIILIONTH time!!!)

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On 11/04/2016 15:56, bit-naughty@hotmail.com wrote:

> What was the "requirements specification" for Where Time Stood Still,
> say, LOL? That a hyperactive 15-yr old had to be kept entertained?

As with any software, the requirements spec details what the software 
should do, and the functional spec details how it should be done.

For a game, the requirements spec often includes docs like a level map 
or a storyboard, and they were certainly used back in the Spectrum days 
just as they are now.

> What was "reusable" in um.... LightForce? (just being cruel, that's
> the 1st 48k software I've mentioned...)

Plenty of stuff was re-used in Spectrum games. Look at different games 
by the same programmers and you'll see plenty of examples of re-using 
the same sprite drawing routines, interrupt-driven music players, etc.

> moved around? So... if a ship has to move, and avoid collisions,...
> put it inside some code that does that, and Um... CALL IT??!! That's
> a SUBROUTINE!! Nice and simple....

OOP is partly just about structuring your code in such a way that 
behaviour (subroutines, usually called 'methods' in OOP) and state (all 
the variables those subroutines manipulate) live together in bundles 
called 'objects'.

So a "Ship" object would consist of the subroutines required to make 
that ship spawn, move, fire, explode, etc., along with all the variables 
(or even other objects) that describe its current state: size, shape, 
colour, position, speed, direction, damage level, etc.

> So - what's all this OOP business, and why should I learn it?

Unless you have a pressing desire to learn an object-oriented language 
such as Objective-C, Java or C++, probably no real reason other than 
idle curiosity.

If you're specifically interested in how it applies to games, these 
might be interesting:

http://gamedevelopment.tutsplus.com/tutorials/quick-tip-intro-to-object-oriented-programming-for-game-development--gamedev-1805

http://inventwithpython.com/blog/2014/12/02/why-is-object-oriented-programming-useful-with-an-role-playing-game-example/

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Trying to learn OOP (for the MIILIONTH time!!!) bit-naughty@hotmail.com - 2016-04-11 07:56 -0700
  Re: Trying to learn OOP (for the MIILIONTH time!!!) Guesser <alistair@zxnet.co.uk> - 2016-04-11 16:07 +0100
  Re: Trying to learn OOP (for the MIILIONTH time!!!) Volker Bartheld <news2016@bartheld.net> - 2016-04-12 08:14 +0200
  Re: Trying to learn OOP (for the MIILIONTH time!!!) AndyW <Andy@nojunqmail.com> - 2016-04-12 07:23 +0100
    Re: Trying to learn OOP (for the MIILIONTH time!!!) bit-naughty@hotmail.com - 2016-04-15 11:30 -0700
  Re: Trying to learn OOP (for the MIILIONTH time!!!) Calum <com.gmail@nospam.scottishwildcat> - 2016-04-12 12:54 +0100
    Re: Trying to learn OOP (for the MIILIONTH time!!!) Guesser <alistair@zxnet.co.uk> - 2016-04-12 13:37 +0100
    Re: Trying to learn OOP (for the MIILIONTH time!!!) bit-naughty@hotmail.com - 2016-04-15 11:33 -0700
      Re: Trying to learn OOP (for the MIILIONTH time!!!) Guesser <alistair@zxnet.co.uk> - 2016-04-15 20:38 +0100
  Re: Trying to learn OOP (for the MIILIONTH time!!!) bit-naughty@hotmail.com - 2016-04-15 11:35 -0700
  Re: Trying to learn OOP (for the MIILIONTH time!!!) bit-naughty@hotmail.com - 2016-04-15 11:36 -0700
    Re: Trying to learn OOP (for the MIILIONTH time!!!) Guesser <alistair@zxnet.co.uk> - 2016-04-15 20:35 +0100
      Re: Trying to learn OOP (for the MIILIONTH time!!!) AndyW <Andy@nojunqmail.com> - 2016-04-18 07:31 +0100
  Re: Trying to learn OOP (for the MIILIONTH time!!!) bit-naughty@hotmail.com - 2016-04-20 01:02 -0700
  Re: Trying to learn OOP (for the MIILIONTH time!!!) bit-naughty@hotmail.com - 2016-04-20 01:02 -0700

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