# Re: [Audyssey] game objects in memory

```Rynhardt;

That's actually a way I was thinking of, myself, to accomplish this. I
personally haven't been working with destructible maps, but it's something that
I really want to do. -And had just been toying with the idea of doing exactly
what you just suggested.```
```
I.E. place an object in an area of a wall which would create an opening there,
like a door or such. In essence, the type of collision detection you'd then do
on that new special object, would in effect, be a negative collision detection.
-Know what I mean? If your player is then completely touching the object, or in
other words, passing through it, then the player would be allowed to pass into
the next room or area of the map. -Does this make sense?…

Another alternative, would be if you're using an array of integers to represent
a map, like we've been discussing, you could then simply set all the points in
a particular radius to a value representing air.

These are the ways I'd consider doing this at present… Hope this helps…

Smiles,

Cara :)
On Dec 8, 2010, at 2:11 PM, Rynhardt Kruger wrote:

Hi Cara,

My idea was originally to have an array of pointers to objects defining the
characteristics of the object at that
location. I also thought to have e.g. one wall object and a lot of pointers to
that one object in the array locations
where the wall should be.
That said, I think you've just convinced me to use the 3d coordination system
with collision detection. :-)
One thing I still have to figure out though, is how to handle something like an
explosion. In the array system I
would've just remove all the pointers along a specific radius. May be one way
is to give every shape in 3d space a
sub-object (another shape) specifying where it's damaged. So you would have a
rectangle-like object representing a wall,
with a circular shape specifying where a mine/projectile struck.
Is there a better way of doing this?

Take care,

Rynhardt

* Cara Quinn <caraqu...@draconisentertainment.com> [101207 23:56]:
> Hi Rynhardt, in theory this sounds good, but I have a couple of questions for
> you.
>
> What data types are you storing in your array? I.E. HOw are you showing that
> there is a wall and not air per se in a particular area? I'm assuming here,
> that we're talking about a full-scale map of the level.
>
> Also, is your player moving in only 1 unit per frame?
>
> I ask these because firstly, it sounds like you're simply treating the world
> as a very large array of described points in essence. (Which begins to sound
> exactly like a 3D coordinate system again) :) The exception being that you
> have labels for each point, which can really unnecessarily inflate the amount
> of data needed to render a map. Even just using a byte of data per
> coordinate, it inflates the map eight times larger than it needs to be rather
> than using a simpler collision-based model.
>
> -And, incidentally, you'll still, in effect, need to use collision detection
> anyway, since the map is full-scale. I.E. if your player is moving at 5
> coordinates per second in a direction but that move rate isn't always the
> same, you'll still need to check to see if the path of the player will come
> into contact with some feature of the map. You'd need some form of collision
> detection for this. -Yes??
>
> game each frame, you could simply use the current room as your bound for
> checking entities. There's no sense checking entities on the other side of
> the map.
>
> Even if you simply used the player's radius instead, and did more detailed
> collision detection based on that, the math to check every entity's position
> in a level really wouldn't be anything for a modern machine.
>
> I like your idea though, using perhaps an array of 8 bit integers, which
> could simply represent a full-scale environment with amazing detail, in the
> sense that one could simply test for a point anywhere on the map and
> instantly know what exactly was there. I.E. A point could contain air, water,
> be solid or not with numerous materials.
>
> I question how much faster or less intensive this would really be in gameplay
> though. -But honestly, I'm not sure it really matters on the scale we're
> talking about here. I.E. we're not even actually rendering any of this in
> graphics so these shapes and structures we're testing against are purely
> hypothetical in the sense that a sphere is simply a 3F coordinate and another
> float for a radius. That's so little data to represent and so little math to
> manage, that it's nothing for a computer these days. -Know what I mean??
>
> I think it's really interesting though, as I've said, as it really sounds
> like your and other's full-scale approach is really beginning to blend with a
> raw 3D coord system anyway. :) I love the idea of symbolic representation of
> 'reality' and vice versa!? woohoo! :)
>
> Have a totally awesome day!?
>
> Smiles,
>
> Cara :)

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