Please help, problems drawing bricks (breakout)

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Whaddaboe

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Joined: 15th Jul 2006

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Posted: 15th Jul 2006 16:25

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Hi, im a real n00b at darkbasic (using pro btw)and iv decided to make a breakout game as my second project (did pong a few days ago)

im using an array to record the bricknumber,x position,y position and "whether it has been destroyed or not" for each brick
it looks like this

+ Code Snippet

dim brick(bnum,bx,by,bhit)
   brick(1)=100,20,0
   brick(2)=140,20,0
   brick(3)=180,20,0
   brick(4)=220,20,0
   brick(5)=260,20,0
   brick(6)=300,20,0
   brick(7)=340,20,0
   brick(8)=380,20,0
   brick(9)=420,20,0
   brick(10)=460,20,0
   brick(11)=500,40,0
   brick(12)=120,40,0
   brick(13)=160,40,0
   brick(14)=200,40,0
   brick(15)=240,40,0
   brick(16)=280,40,0
   brick(17)=320,40,0
   brick(18)=360,40,0
   brick(19)=400,40,0
   brick(20)=440,40,0
   brick(21)=100,60,0
   brick(22)=140,60,0
   brick(23)=180,60,0
   brick(24)=220,60,0
   brick(25)=260,60,0
   brick(26)=300,60,0
   brick(27)=340,60,0
   brick(28)=380,60,0
   brick(29)=420,60,0
   brick(30)=460,60,0
   brick(31)=500,60,0
   brick(32)=120,80,0
   brick(33)=160,80,0
   brick(34)=200,80,0
   brick(35)=240,80,0
   brick(36)=280,80,0
   brick(37)=320,80,0
   brick(38)=360,80,0
   brick(39)=400,80,0
   brick(40)=440,80,0

Then I used this code here to draw the bricks

+ Code Snippet

 for brick=1 to bnum
      sprite 3,bx,by,bnum+2
   next brick

I ran the program and there were no syntax errors, but it did not draw the bricks. I think im probably missing out a command or something here, so i searched the codebase and found nothing.

Please help,
Thanks in advance

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Daemon

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Joined: 16th Dec 2005

Location: Everywhere

Posted: 15th Jul 2006 18:31

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You are declaring you array wrong.

What you want are user defined types.

This means before you declare the array you should put-

+ Code Snippet

type bricks
   bx as integer
   by as integer
   bhit as boolean
endtype

then you would declare the array-

+ Code Snippet

dim brick(bnum) as bricks

and then you would access the memory like this

+ Code Snippet

brick(1).bx=100
brick(1).by=20
brick(1).bhit=0

etc.

Good luck with this game. (I've already made my own version)

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Dream And Death

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Joined: 21st Feb 2006

Location: The circus! Juggling job, kids and DBPro

Posted: 15th Jul 2006 19:57

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Actually, he is declaring the array wrongly - and he is referencing it wrongly.

If you want to use plain arrays without getting into UDTs yet (and I would advise mastering arrays first - UDTs are very powerful, but get the basics sorted first!), you need to do

+ Code Snippet

numbricks=40
Dim brick(numbricks,3)

Then you reference it:
brick(1,1) is the x coordinate of brick 1
brick(1,2) is the y coordinate of brick 1
brick(1,3) is whether brick 1 exists
or
brick(29,1) is the x coordinate of brick 29
brick(12,2) is the y coordinate of brick 12
brick(6,3) is whether brick 6 exists

As I said, best to get this under your belt before worrying about UDTs!

"You get what everyone gets, you get a lifetime!" - Death, The Sandman Library

First you Dream, then you ... - Neil Gaiman, 2001

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Jay Bee

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Joined: 15th Jul 2006

Location: Ashford, Kent, England

Posted: 16th Jul 2006 07:09

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Er thats interesting, for a start you aren't giving bnum a value, and I don't know why it's in the array anyway. Surely you would define bnum outside as 40, and then the array would go a little something like this:

+ Code Snippet

DIM brick(bx,by,bhit)

And then the loop to draw the bricks would be:

+ Code Snippet

for brick=1 to bnum
   sprite 3,brick(brick,0),brick(brick,1),bnum+2
next brick

Hope this helps

-J

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Whaddaboe

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Joined: 15th Jul 2006

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Posted: 16th Jul 2006 14:30

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OK, iv done what u said, but now i have a different problem.
my array looks like this...

`brick array
dim brick(numbricks,3)
   brick(1,1)=100
   brick(1,2)=20
   brick(1,3)=0
   brick(2,1)=140
   brick(2,2)=20
   brick(2,3)=0
   brick(3,1)=180
   brick(3,2)=20
   brick(3,3)=0
   brick(4,1)=220
   brick(4,2)=20
   brick(4,3)=0
   brick(5,1)=260
   brick(5,2)=20
   brick(5,3)=0
   brick(6,1)=300
   brick(6,2)=20
   brick(6,3)=0
   brick(7,1)=340
   brick(7,2)=20
   brick(7,3)=0
   brick(8,1)=380
   brick(8,2)=20
   brick(8,3)=0
   brick(9,1)=420
   brick(9,2)=20
   brick(9,3)=0
   brick(10,1)=460
   brick(10,2)=20
   brick(10,3)=0
   brick(11,1)=120
   brick(11,2)=40
   brick(11,3)=0
   brick(12,1)=160
   brick(12,2)=40
   brick(12,3)=0
   brick(13,1)=200
   brick(13,2)=40
   brick(13,3)=0
   brick(14,1)=240
   brick(14,2)=40
   brick(14,3)=0
   brick(15,1)=280
   brick(15,2)=40
   brick(15,3)=0
   brick(16,1)=320
   brick(16,2)=40
   brick(16,3)=0
   brick(17,1)=360
   brick(17,2)=40
   brick(17,3)=0
   brick(18,1)=400
   brick(18,2)=40
   brick(18,3)=0
   brick(19,1)=440
   brick(19,2)=40
   brick(19,3)=0
   brick(20,1)=300
   brick(20,2)=60
   brick(20,3)=0
   brick(21,1)=100
   brick(21,2)=80
   brick(21,3)=0
   brick(22,1)=140
   brick(22,2)=80
   brick(22,3)=0
   brick(23,1)=180
   brick(23,2)=80
   brick(23,3)=0
   brick(24,1)=220
   brick(24,2)=80
   brick(24,3)=0
   brick(25,1)=260
   brick(25,2)=80
   brick(25,3)=0
   brick(26,1)=300
   brick(26,2)=80
   brick(26,3)=0
   brick(27,1)=340
   brick(27,2)=80
   brick(27,3)=0
   brick(28,1)=380
   brick(28,2)=80
   brick(28,3)=0
   brick(29,1)=420
   brick(29,2)=80
   brick(29,3)=0
   brick(30,1)=460
   brick(30,2)=80
   brick(30,3)=0
   brick(31,1)=120
   brick(31,2)=100
   brick(31,3)=0
   brick(32,1)=160
   brick(32,2)=100
   brick(32,3)=0
   brick(33,1)=200
   brick(33,2)=100
   brick(33,3)=0
   brick(34,1)=100
   brick(34,2)=40
   brick(34,3)=0
   brick(35,1)=280
   brick(35,2)=100
   brick(35,3)=0
   brick(36,1)=320
   brick(36,2)=100
   brick(36,3)=0
   brick(37,1)=360
   brick(37,2)=100
   brick(37,3)=0
   brick(38,1)=400
   brick(38,2)=100
   brick(38,3)=0
   brick(39,1)=440
   brick(39,2)=100
   brick(39,3)=0
   brick(40,1)=300
   brick(40,2)=120
   brick(40,3)=0

+ Code Snippet

`brick array
dim brick(numbricks,3)
   brick(1,1)=100
   brick(1,2)=20
   brick(1,3)=0
   brick(2,1)=140
   brick(2,2)=20
   brick(2,3)=0
   brick(3,1)=180
   brick(3,2)=20
   brick(3,3)=0
   brick(4,1)=220
   brick(4,2)=20
   brick(4,3)=0
   brick(5,1)=260
   brick(5,2)=20
   brick(5,3)=0
   brick(6,1)=300
   brick(6,2)=20
   brick(6,3)=0
   brick(7,1)=340
   brick(7,2)=20
   brick(7,3)=0
   brick(8,1)=380
   brick(8,2)=20
   brick(8,3)=0
   brick(9,1)=420
   brick(9,2)=20
   brick(9,3)=0
   brick(10,1)=460
   brick(10,2)=20
   brick(10,3)=0
   brick(11,1)=120
   brick(11,2)=40
   brick(11,3)=0
   brick(12,1)=160
   brick(12,2)=40
   brick(12,3)=0
   brick(13,1)=200
   brick(13,2)=40
   brick(13,3)=0
   brick(14,1)=240
   brick(14,2)=40
   brick(14,3)=0
   brick(15,1)=280
   brick(15,2)=40
   brick(15,3)=0
   brick(16,1)=320
   brick(16,2)=40
   brick(16,3)=0
   brick(17,1)=360
   brick(17,2)=40
   brick(17,3)=0
   brick(18,1)=400
   brick(18,2)=40
   brick(18,3)=0
   brick(19,1)=440
   brick(19,2)=40
   brick(19,3)=0
   brick(20,1)=300
   brick(20,2)=60
   brick(20,3)=0
   brick(21,1)=100
   brick(21,2)=80
   brick(21,3)=0
   brick(22,1)=140
   brick(22,2)=80
   brick(22,3)=0
   brick(23,1)=180
   brick(23,2)=80
   brick(23,3)=0
   brick(24,1)=220
   brick(24,2)=80
   brick(24,3)=0
   brick(25,1)=260
   brick(25,2)=80
   brick(25,3)=0
   brick(26,1)=300
   brick(26,2)=80
   brick(26,3)=0
   brick(27,1)=340
   brick(27,2)=80
   brick(27,3)=0
   brick(28,1)=380
   brick(28,2)=80
   brick(28,3)=0
   brick(29,1)=420
   brick(29,2)=80
   brick(29,3)=0
   brick(30,1)=460
   brick(30,2)=80
   brick(30,3)=0
   brick(31,1)=120
   brick(31,2)=100
   brick(31,3)=0
   brick(32,1)=160
   brick(32,2)=100
   brick(32,3)=0
   brick(33,1)=200
   brick(33,2)=100
   brick(33,3)=0
   brick(34,1)=100
   brick(34,2)=40
   brick(34,3)=0
   brick(35,1)=280
   brick(35,2)=100
   brick(35,3)=0
   brick(36,1)=320
   brick(36,2)=100
   brick(36,3)=0
   brick(37,1)=360
   brick(37,2)=100
   brick(37,3)=0
   brick(38,1)=400
   brick(38,2)=100
   brick(38,3)=0
   brick(39,1)=440
   brick(39,2)=100
   brick(39,3)=0
   brick(40,1)=300
   brick(40,2)=120
   brick(40,3)=0

and the code to draw looks like this...

+ Code Snippet

   for brick = 1 to numbricks
      sprite 3, brick(brick,1), brick(brick,2), imagenumber
      imagenumber = imagenumber + 1
   next brick

However, when i run the program it says-
"Runtime Error 118 - Array does not exist or array subscript out of bounds at line 62"

line 62 is this line
sprite 3, brick(brick,1), brick(brick,2), imagenumber

Please help

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Jay Bee

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Joined: 15th Jul 2006

Location: Ashford, Kent, England

Posted: 16th Jul 2006 18:02

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I think you have the wrong end of the stick. Such is my understanding, you can't draw the same sprite multiple times with different image numbers, in fact it is different sprite numbers with the same image number. This code worked for me:

`brick array
numbricks = 40
dim brick(numbricks,3)
   brick(1,1)=100
   brick(1,2)=20
   brick(1,3)=0
   brick(2,1)=140
   brick(2,2)=20
   brick(2,3)=0
   brick(3,1)=180
   brick(3,2)=20
   brick(3,3)=0
   brick(4,1)=220
   brick(4,2)=20
   brick(4,3)=0
   brick(5,1)=260
   brick(5,2)=20
   brick(5,3)=0
   brick(6,1)=300
   brick(6,2)=20
   brick(6,3)=0
   brick(7,1)=340
   brick(7,2)=20
   brick(7,3)=0
   brick(8,1)=380
   brick(8,2)=20
   brick(8,3)=0
   brick(9,1)=420
   brick(9,2)=20
   brick(9,3)=0
   brick(10,1)=460
   brick(10,2)=20
   brick(10,3)=0
   brick(11,1)=120
   brick(11,2)=40
   brick(11,3)=0
   brick(12,1)=160
   brick(12,2)=40
   brick(12,3)=0
   brick(13,1)=200
   brick(13,2)=40
   brick(13,3)=0
   brick(14,1)=240
   brick(14,2)=40
   brick(14,3)=0
   brick(15,1)=280
   brick(15,2)=40
   brick(15,3)=0
   brick(16,1)=320
   brick(16,2)=40
   brick(16,3)=0
   brick(17,1)=360
   brick(17,2)=40
   brick(17,3)=0
   brick(18,1)=400
   brick(18,2)=40
   brick(18,3)=0
   brick(19,1)=440
   brick(19,2)=40
   brick(19,3)=0
   brick(20,1)=300
   brick(20,2)=60
   brick(20,3)=0
   brick(21,1)=100
   brick(21,2)=80
   brick(21,3)=0
   brick(22,1)=140
   brick(22,2)=80
   brick(22,3)=0
   brick(23,1)=180
   brick(23,2)=80
   brick(23,3)=0
   brick(24,1)=220
   brick(24,2)=80
   brick(24,3)=0
   brick(25,1)=260
   brick(25,2)=80
   brick(25,3)=0
   brick(26,1)=300
   brick(26,2)=80
   brick(26,3)=0
   brick(27,1)=340
   brick(27,2)=80
   brick(27,3)=0
   brick(28,1)=380
   brick(28,2)=80
   brick(28,3)=0
   brick(29,1)=420
   brick(29,2)=80
   brick(29,3)=0
   brick(30,1)=460
   brick(30,2)=80
   brick(30,3)=0
   brick(31,1)=120
   brick(31,2)=100
   brick(31,3)=0
   brick(32,1)=160
   brick(32,2)=100
   brick(32,3)=0
   brick(33,1)=200
   brick(33,2)=100
   brick(33,3)=0
   brick(34,1)=100
   brick(34,2)=40
   brick(34,3)=0
   brick(35,1)=280
   brick(35,2)=100
   brick(35,3)=0
   brick(36,1)=320
   brick(36,2)=100
   brick(36,3)=0
   brick(37,1)=360
   brick(37,2)=100
   brick(37,3)=0
   brick(38,1)=400
   brick(38,2)=100
   brick(38,3)=0
   brick(39,1)=440
   brick(39,2)=100
   brick(39,3)=0
   brick(40,1)=300
   brick(40,2)=120
   brick(40,3)=0
load image "brick.jpg",1
for i = 1 to numbricks
   set sprite i,1,1
next i
spritenum = 1
for brick = 1 to numbricks
      sprite spritenum, brick(brick,1), brick(brick,2), 1
      spritenum = spritenum + 1
   next brick

wait key

+ Code Snippet

`brick array
numbricks = 40
dim brick(numbricks,3)
   brick(1,1)=100
   brick(1,2)=20
   brick(1,3)=0
   brick(2,1)=140
   brick(2,2)=20
   brick(2,3)=0
   brick(3,1)=180
   brick(3,2)=20
   brick(3,3)=0
   brick(4,1)=220
   brick(4,2)=20
   brick(4,3)=0
   brick(5,1)=260
   brick(5,2)=20
   brick(5,3)=0
   brick(6,1)=300
   brick(6,2)=20
   brick(6,3)=0
   brick(7,1)=340
   brick(7,2)=20
   brick(7,3)=0
   brick(8,1)=380
   brick(8,2)=20
   brick(8,3)=0
   brick(9,1)=420
   brick(9,2)=20
   brick(9,3)=0
   brick(10,1)=460
   brick(10,2)=20
   brick(10,3)=0
   brick(11,1)=120
   brick(11,2)=40
   brick(11,3)=0
   brick(12,1)=160
   brick(12,2)=40
   brick(12,3)=0
   brick(13,1)=200
   brick(13,2)=40
   brick(13,3)=0
   brick(14,1)=240
   brick(14,2)=40
   brick(14,3)=0
   brick(15,1)=280
   brick(15,2)=40
   brick(15,3)=0
   brick(16,1)=320
   brick(16,2)=40
   brick(16,3)=0
   brick(17,1)=360
   brick(17,2)=40
   brick(17,3)=0
   brick(18,1)=400
   brick(18,2)=40
   brick(18,3)=0
   brick(19,1)=440
   brick(19,2)=40
   brick(19,3)=0
   brick(20,1)=300
   brick(20,2)=60
   brick(20,3)=0
   brick(21,1)=100
   brick(21,2)=80
   brick(21,3)=0
   brick(22,1)=140
   brick(22,2)=80
   brick(22,3)=0
   brick(23,1)=180
   brick(23,2)=80
   brick(23,3)=0
   brick(24,1)=220
   brick(24,2)=80
   brick(24,3)=0
   brick(25,1)=260
   brick(25,2)=80
   brick(25,3)=0
   brick(26,1)=300
   brick(26,2)=80
   brick(26,3)=0
   brick(27,1)=340
   brick(27,2)=80
   brick(27,3)=0
   brick(28,1)=380
   brick(28,2)=80
   brick(28,3)=0
   brick(29,1)=420
   brick(29,2)=80
   brick(29,3)=0
   brick(30,1)=460
   brick(30,2)=80
   brick(30,3)=0
   brick(31,1)=120
   brick(31,2)=100
   brick(31,3)=0
   brick(32,1)=160
   brick(32,2)=100
   brick(32,3)=0
   brick(33,1)=200
   brick(33,2)=100
   brick(33,3)=0
   brick(34,1)=100
   brick(34,2)=40
   brick(34,3)=0
   brick(35,1)=280
   brick(35,2)=100
   brick(35,3)=0
   brick(36,1)=320
   brick(36,2)=100
   brick(36,3)=0
   brick(37,1)=360
   brick(37,2)=100
   brick(37,3)=0
   brick(38,1)=400
   brick(38,2)=100
   brick(38,3)=0
   brick(39,1)=440
   brick(39,2)=100
   brick(39,3)=0
   brick(40,1)=300
   brick(40,2)=120
   brick(40,3)=0
load image "brick.jpg",1
for i = 1 to numbricks
   set sprite i,1,1
next i
spritenum = 1
for brick = 1 to numbricks
      sprite spritenum, brick(brick,1), brick(brick,2), 1
      spritenum = spritenum + 1
   next brick

   wait key

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