Find Object of a Type

I'm using the following sourcecode to find an object in an type and update it.

Function UpdateSprite(CurrentSprite,x,y)     
  For Sprite.Sprite = Each Sprite
     If Sprite\Sprite=CurrentSprite Then Exit
  Next
  Sprite\x = x
  Sprite\y = y
End Function

In source from other people I found a function called Object, it looks something like that:

Sprite\Sprite = Object.Sprite(something);

but I didn't find anything in Blitz3D-Helpfile, so I just wondering how this command works.

Do a search for Handle and Object on the forums - plenty of code there to demonstrate it uses. Alot of folk store the Handle of the type instance in the Entities Name - not sure if you can do this with sprites.

Anyhoo, you may want to consider using an array of types for this purpose.

Global sprites = 100

Type sprite_type
 field sprite 
 field x, y
end type

dim sprite. sprite_type ( sprites-1 )

Then to construct the type instance use something like this ..

for l = 0 to sprites-1
 sprite ( l ) = new sprite_type
 sprite ( l )\x = whatever
 sprite ( l )\y = whatever
next

Then you can directly access the type instance with this ..

update_sprite ( sprite( current_sprite ) , 5, 6 )

Function update_sprite ( check.sprite_type, x, y )
  check\x = x
  check\y = y
End Function

This should probably work quite well for you although I'd recommend recyling the type instances rather than deleting and creating new ones when required.

Stevie.

Basically, the unofficial command 'Handle()' accepts a Type pointer as a parameter and spits out an integer number which is a reference to the Type element stored in the Type pointer.

The unofficial command 'Object.whatever_type()' accepts an integer value (which should be a value output by the 'Handle()' command) and spits out a Type pointer value. The 'Object' keyword should be followed by a dot and then by the name of the Type being output.

This allows you to use Types in a polymorphic fashion.

Example:

Type my_type
Field whatever
End Type

Global this_is_my_type.my_type = New my_type
Global this_is_my_other_type.my_type

integer_variable = Handle( this_is_my_type.my_type )
this_is_my_other_type.my_type = Object.my_type( integer_variable )