Sanctus's problem's topic

Since I always have problems I decided not to fill the forum with stupid questions and insted to put my questions and problems here
So here is the first one:

Strict


Global terrain_img:Timage 
Type Tmap
	Field xtiles:Int
	Field ytiles:Int
	Field map:Ttile[,]
End Type

Type Ttile
	Field x:Int
	Field y:Int
	Field img:Int ' just the frame for the terrain_img
End Type

Global map:Tmap = New Tmap
map.xtiles = 128
map.ytiles = 128
map.map = New Ttile[map.xtiles , map.ytiles]

Local i:Int
Local t:Int

For i = 1 To map.xtiles
	For i = 1 To map.ytiles
		map.map[i , t].img = 1
	Next
Next

Atempt to acces field of null object...
Can anyone help me and tell me how to avoid these things in the future?

For i = 0 to map.xtiles-1
    For t = 0 to map.ytiles
         map.map[i,t].img = 1
    Next
Next

First failure 'i' in the second loop should be 't' ;)
Second Failure: Arrays in Bmax are zero related, that means you create an array like this MAP:TTiles[256]. So the size of the array is 256, but not as in BB the index doesn't range from 1 to 256. instead it goes from 0 to 255.

map.map = New Ttile[map.xtiles , map.ytiles]

Only allocates the array, but not the type instances, you have to create those seperately, so your for..next loop could look like this:

For i = 0 Until map.xtiles
	For i = 0 Until map.ytiles
		map.map[i , t] = New Ttile
		map.map[i , t].img = 1
	Next
Next

And as mentioned above, the indices of an array go from 0 to size-1, you can use 'Until' instead of 'To' in a for..next loop to skip the last number.

For i = 0 To map.xtiles-1
For t = 0 To map.ytiles-1
map.map[i, t] = New TTile


Which I told you yestrday

Strict


Global terrain_img:Timage 
Type Tmap
	Field xtiles:Int
	Field ytiles:Int
	Field map:Ttile[,]
End Type

Type Ttile
	Field x:Int
	Field y:Int
	Field img:Int ' just the frame for the terrain_img
End Type

Global map:Tmap = New Tmap
map.xtiles = 128
map.ytiles = 128
map.map = New Ttile[map.xtiles , map.ytiles]

Local i:Int
Local t:Int

For i = 0 To map.xtiles-1
	For t = 0 To map.ytiles-1
		map.map[i, t] = New TTile
		map.map[i , t].img = 1
	Next
Next

You need to initialise each item in the array as a TTile before accessing them.
And arrays are zero based

yeah thx but why don't they store some object????
I modified it like this

For i = 1 To map.xtiles-1
	For i = 1 To map.ytiles-1
		map.map[i , t].img = 1
	Next
Next

srry till i finished posting there where 4 more replys :D

I found a article about exttreme programming and its way better that I was doing...
The ideea of not making the program expadable saves me a lot of time and its easyer to fo like that...
why define all the types from the beginning when I will use some only at the end...

Added a few things and Im again in problems

Strict

Graphics 800,600,1
Global terrain_img:Timage = LoadAnimImage("gfx\terrain.bmp",32,32,0,4)
Type Tmap
	Field xtiles:Int
	Field ytiles:Int
	Field map:Ttile[,]
End Type

Type Ttile
	Field x:Int
	Field y:Int
	Field img:Int ' just the frame for the terrain_img
	Method drawself()
		DrawImage terrain_img , x * 32 , y * 32 , img
	End Method
End Type

Global map:Tmap = New Tmap
map.xtiles = 16
map.ytiles = 16
map.map = New Ttile[map.xtiles , map.ytiles]

Local i:Int
Local t:Int

For i = 1 Until map.xtiles
	For t = 1 Until map.ytiles
		map.map[i , t] = New Ttile
		map.map[i , t].x = i
		map.map[i , t].y = t
		map.map[i , t].img = 1
	Next
Next

While Not KeyHit(key_escape)
	Local i:Int
	Local t:Int
	
	For i = 1 Until map.xtiles
		For t = 1 Until map.ytiles
			map.map[i , t].drawself()
		Next
	Next
	
	Cls
	Flip
Wend

the thing is that is doesn't draw anything...
any ideeas of why that happens?

pls help me....
I'm still in need of help

hmmm...
cls
flip
thats why there was a problem...
I din't think it might make a diference if I change the order of those 2

http://www.blitzbasic.com/Community/posts.php?topic=62083

O'm not totaly beginner...
Just that I din't changed the order of cls and flip(never)
So by doing that I didn't think that was the problem(I didn''t even noticed)

Before posting anymore bugs or problems, please start using SuperStrict. It will lead you halfway home.

I didn't really get the oin in using superstrict instead of strict....but if you say so....

Superstrict fixes the compiler to work more like it should.

I'm being a bit of an ass about that, but it's true on many levels. Superstrict will catch a lot of the ludicrous errors that Blitz lets you make by default.

@Sanctus, skip the first chapter

Heck no!!!!!! its 60 usd!!!!!!way to much for me(I'm 14)

can bmax load gifs?(i never tryed and to ber shure that thats the problem in my code)

found out that It can not...
Question
where is a tutorial with readdata(the maps from the source)
In my ther pacman I used a lvl editor and now i wanth to load them from the .exe

Sanctus, you're a brave lad, welcome to the world of Blitzmax documentation :-

"ReadData : Read classic BASIC style data."

Now, that should be enough according to BRL. Next question?

Here's an example :-

For i=1 To 5
	RestoreData mydata	'reset the data pointer everly loop so we don't read past the end
	ReadData name$,age,skill
	Print "name="+name+" age="+age+" skill="+skill
Next

#mydata	'program label that can be used with the RestoreData command

DefData "Simon",37,5000

There are 3 commands. RestoreData, ReadData and DefData.

Defdata is used to actually define your data. Usually you mark the start of your data with a label - see the # symbol in the code above. This label is so you can tell BM where to begin reading the data from the next time you do a ReadData. (You can have as many chunks of data as you like, each with their own label, so you can for example have each of your game's level data with it's own label)

ReadData is used to load that data into variables at run-time. Each time you read a peice of data, the current data pointer moves to the next peice and so on.

RestoreData is used to tell BM where to begin reading the next item of data the next time ReadData is called.

I LOL'd.

@Brendane thx man
I think I'll get it working :D

Sanctus, if you just want to know how to use those functions for the sake of learning, great. But if your aim is only to ensure that your exe contains the level data there is another way (presuming you already have the data files on disk).

Use IncBin to import files into your final exe. These files can then be loaded without any modification just by using "incbin::" before the file you wish to load.

Example :-

IncBin "level1.dat"

Global currentLevel:TLevel = LoadLevelData( "incbin::level1.dat" )

This can be much more flexible in the long run than using DefData for your level data. Why? Because you can create and modify your datafiles with a level editor - something you'll wish you could do if you end up needing to modify 1000 lines of DefData statements.

Remember, you can IncBin any kind of file - images, sounds, whatever. When you need to load the file just put "incbin::" before it (so the load routine knows where it lives).

Magic eh.

nah it isn't that the reason but it takes a lot of time to make a lvl editor....
I will make it but later when the game will have some reasons to have playble lvls
thx cuz u helped me a lot... i mangaged to make it read the walls from data(and miracously when I wrote it I din't got any bugs in my code...for the first time)

Oh here is the code(tell me if you see something that is not right)

SuperStrict



Graphics 800,600,32
Global wall_img:Timage = LoadImage("gfx\wall.bmp")
Global pac_img:Timage = LoadImage("gfx\pacman_stand.bmp")
Global pac_left_img:Timage = LoadAnimImage("gfx\pacman_left.bmp" , 32 , 32 , 0 , 4)
Global pac_right_img:Timage = LoadAnimImage("gfx\pacman_right.bmp" , 32 , 32 , 0 , 4)
Global pac_up_img:Timage = LoadAnimImage("gfx\pacman_up.bmp" , 32 , 32 , 0 , 4)
Global pac_down_img:Timage = LoadAnimImage("gfx\pacman_down.bmp" , 32 , 32 , 0 , 4)



Type Tgame
	Field lives:Int
	Field points:Int
	Field lvl:Int
	Field map:Tmap = New Tmap
	Field player:Tpacman = New Tpacman
	Field wall_list:Tlist = New Tlist
	
	Method testload()
		RestoreData Map1_Wall
		
		ReadData map.xtiles , map.ytiles
		
		Local i:Int
		Local t:Int
		
		For i = 1 To map.xtiles
			For t = 1 To map.ytiles
				Local x:Int
				ReadData x
				If x = 1
				
				Local wall:Twall = New Twall
				wall.x = (i - 1) * 32
				wall.y = (t - 1) * 32
				wall_list.addlast(wall)
				End If
			Next
		Next
	End Method
			
	Method drawall()
		Local wall:Twall
		For wall = EachIn wall_list
			wall.drawself()
		Next		
	End Method
End Type




Type Tpacman
	Field x:Float
	Field y:Float
	Field dir:Int
	Field frame:Int
	
	Method drawself()
		Select dir
		Case 0
		DrawImage pac_img , x , y
		Case 1
		DrawImage pac_left_img , x , y , frame
		Case 2
		DrawImage pac_up_img , x , y , frame
		Case 3
		DrawImage pac_right_img , x , y , frame
		Case 4
		DrawImage pac_down_img , x , y , frame
		End Select
	End Method
	
	Method updateself()
		'/////////THE FRAME CODE/////////////
		frame = frame + 1
		If frame > 3
		frame = 0
		End If
		'/////////END FRAME CODE
		
		
		
		
		
	End Method
	
	
	
	
End Type

Type Tmap
	Field xtiles:Int
	Field ytiles:Int
	
	
				
		
	
End Type

Type Twall
	Field x:Int
	Field y:Int
	Field img:Timage
	
	Method drawself()
		DrawImage wall_img , x , y
	End Method
End Type



Global game:Tgame = New Tgame
game.testload()

While Not KeyHit(key_escape)


game.drawall()
Flip
Cls

Wend
















#Map1_Wall

DefData 6 , 6

DefData 1 , 1 , 1 , 1 , 1 , 1
DefData 1 , 0 , 0 , 0 , 0 , 1
DefData 1 , 0 , 1 , 0 , 0 , 1
DefData 1 , 0 , 0 , 0 , 0 , 1
DefData 1 , 0 , 0 , 0 , 0 , 1
DefData 1 , 1 , 1 , 1 , 1 , 1

Looks good to me mate.

One thing I would suggest before you go any further is to use a 2d array to store your map (as opposed to your tlist of walls. Why? Because at some point you're going to need to perform checks on collision/available routes. That will be much more efficient by looking up your player position in a map array and comparing the value (is it a wall, or a power up, or a dot?).

You already have the 2d array in concept (look at your data).

you meen to store my wall objects in a array?
I can do that...

Hmm.... this is not a problem but I posted some gfx of mine in tha gfx section pls go there and view it :D