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fixed my problem below now i am wndering if it is possible to have collision responding to 2d map tiles?

Lots of tile collision posts on previous pages. Basically you are keeping a check on the tile positions by storing all of them in an array with an offset value.

arrays dont really know how to use them

An array is just a way to split numbers up into groups.....

Example....Dim Cards(13,4)....A pack of cards 13 numbers..4 suits

**********************************************************************

Dim Map(20,20)....A tile map 20 horizontal tiles, 20 vertical

load Image "Grass.bmp",1......a 32 pixel tile
load Image "Wall.bmp",2......a 32 pixel tile


map(1,1) = 1.....The top corner tile has a value of 1 = Grass
Map(2,1) = 2.....The next tile is a wall.

for y = 0 to 20
for x = 0 to 20

If map(x,y) > 0
Paste image Map(x,y),x*32,y*32...
endif

next x
next y


So the program just pastes 2 tiles. It skips the other tiles because you have not made a map yet. You really need to build the map before you do all this. Data can be used to build the map. You can find Map editors that will create the data. You have maybe a lot to learn to get this program working the way that you want it to. Especially if you have never used an array before.

ive always had a basic idea but that is concreate thanx a lot ill have to keep this thread

DaedalusX,

It might help to look at my reply to JHA in the following thread.
http://darkbasicpro.thegamecreators.com/?m=forum_view&t=32618&b=4

Specifically my response with the screenshot & source code button.

---
The basic idea is to use a mutli-dimensional array (3 dimensional in this case).

Dim world_array(Xtiles,Ytiles,numoflayers)

*! Remember arrays start at 0 so for a (20 tile by 20 tile) world with 5 layers you would.

dim world_array(20,20,5)

when indexing into this array you would have
world_array(<0 to 19>, <0 to 19>, <0 to 4>

hence, the top-left tile the world at the lowest layer would be
world_array(0,0,0)
*******

Layer 0: Are used for base terrain and drawn beneath the player.

Layer 1: can be used as a fringing/transition layer or for highgrass, bridges over water, secret passages(if you placed a wall tile on this layer the character would be able to walk over it, I use this for walkable water and the like) etc.. and are drawn beneath the player

Layer 2: This is the layer that your character is on. Any tiles placed in this layer your character will collide with and not be able to walk on. eg. tree stumps/trunks, items like barrels, deepoceans, mountains, other characters.

layer 3: Tiles that appear above the player eg.s (tree limbs, bridges the charcter walks under

layer 4: I use this layer for effects or sometimes I decide to have the character at level three if I need more effects for tiles underneath.

By using this method, you only need to check for collision on one layer (in this example layer 2). So the collision is internally handled in the design of the map. As well as the drawing order. You always draw layer 0 first, then layer 1, layer 2, 3, and finally 4. A value of 0(a good value to choose) in any layers array index is transparent. A small example(only showing layer 0,& 2) of a island surounded by ocean. The island is walkable so will be drawn on layer 0, the ocean is not walkable so it will be dran on layer 2. assume that 0=transparent: 1=ocean : 8=land

layer 0 (walkable):
0000000000
0088888800
0088888800
0088888800
0000000000

layer 2 (not walkalble):
1111111111
1100000011
1100000011
1100000011
1111111111

when drawn to the screen it the world would look like this
1111111111
1188888811
1188888811
1188888811
1111111111

Not really, index numbers run from 0 to the declared index number.

So basicly:

dim Array(20,20,5)

can be used with the index numbers 0-20,0-20,0-5
take a look at my tutorial site (link below my sig)

Hey Zen,

I just checked out what Emperor Baal says above and he's right. Although no other language, that I know of, does it this way, apparently Dark Basic does.

So when you dimension an array with 20 elements, it actually holds 21 elements.

Is this a bug or a feature?

JHA

That's what I get for going on assumptions and past experience. Leave it to DB to go against the norm, or any rational convention.
I have dealt with both; languages that start indexing at 0 and others that start at 1. This is the first time I have encountered a language that starts at 0 but goes up to the number in the dim command. It doesn't make much sense.

If I say dim array(20)

I am requesting 20 elements AND expecting 20 elements .
either
from 0 to 19: OR : 1 to 20

Never am I expecting 21 elements from 0 to 20!

I swear DB has it in for me sometimes!
From now on I'm going to have my computer play the theme to the "Twilight Zone" everytime I launch the compiler.


I hope my other points weren't missed because of this oversight.

It's not irrational - It just covers both bases. Remember that this is a language that a lot of beginners learn on, and a few experienced programmers use.

It only makes sense to cater for both sides ... although I admit that catering for both at the same time may seem a little strange, but its easier for Lee - the same generated code deals with both ways.