Attempting to 'move' all onscreen objects...

[gvillarreal]

Writing a simple scrolling shooter that wraps the 'world' in all directions ala 'Sinistar' or C64 'Survivor'.

Wrapping the world is the easy part...when the player reaches a particular x or y at either extent, I move him to the opposite extent of the map, and it appears that the 'world' just keeps going.

My problem is moving all the active objects on the screen along with the player when he 'wraps'.

Right now, I'm attempting to move just one active object type, an enemy ship that chases the player around, but there can be multiple instances of this enemy ship onscreen at once and that is where the problem appears, not all the ships are being moved, so they just 'disappear' when the player 'wraps'.

Here is what I'm doing in pseudocode (only showing x wrapping for one direction):

Always set globalVarWrapX = playerX
set globalVarWrapY = playerY

if playerX>2880 then globalVarWrap = 1
globalVarWrapX = 320

if globalVarWrap = 1 then

' save the offset of the enemy ship from the player ship
set enemyShip xOffset = enemyShipX-playerX
set enemyShip yOffset = enemyShipY-playerY

' move the player to the other side of the screen
set playerX = globalVarWrapX
set playerY = globalVarWrapY

' move the enemy ships to the other side of the screen
set enemyShipX = playerX+enemyShip xOffset
set enemyShipY = playerY+enemyShip yOffset

set globalVarWrap = 0

endif

It appears that when there is just one enemy ship, this works fine, but two or more and only one of the ships will make the 'wrap', the others just disappear. Any ideas?

Thanks in advance!

Gil

[Person]

I think there's a widget called something like "Zelda type scrolling".

Hope I helped!

[00J]

try adding a qualifier to your ships and reference them from the qualifier.

reference = enemy

[gvillarreal]

OOJ, can you give me a more concrete example?

Right now under the 'Create New Object' object, I am spawning a new 'enemyShip' every 15 seconds or so. How would I setup this 'qualifier' and then reference them from it?

Thanks.