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Can this be done in Game Editor?

Setup an array move all the Aliens left or right or up or down together. Then, do a distance check to see how close you are to the top, left, right and bottom bounds. If they are too close, move the opposite direction or down.

Yes.

(Your description is a solid basis for the code itself.)

The following PseudoCode outlines a possible solution...



Variables:

global_Invaders_Direction
global_Invaders_Speed

invadersWin


Routines:

init_Invaders
{
invadersWin = FALSE
global_Invaders_Direction = RIGHT
global_Invaders_Speed = SLOWEST

( create invaders in start up position here )

}


On Draw Invader
{
myDirection = global_Invaders_Direction
mySpeed = global_Invaders_Speed

If too close to right ( eg x > max )
drop global level and change global direction
else If too close to left (eg x < min )
drop global level and change global direction
if global level is ground level ( eg y > max )
invadersWin = TRUE

adjust global_Invaders_Speed according to population of invaders

}


I hope this helps!

You can make this too:

- Create a Wire Frame actor (actor Base)
- Create your alliens and make the Base actor your parent
- to move all alliens, just move the Base actor
- Create other four Wire Frame actors (will be our sensor actors: sensor_left, sensor_right, sensor_top, sensor bottom)
- Put one at right side of view, other on left, other on top, other on bottom

Now, in your Base actor:

- When collides with sensor_left, xvelocity = 1
- When collides with sensor_right, xvelocity = -1
- When collides with sensor_top, yvelocity = 1
- When collides with sensor_bottom, yvelocity = -1

makslane, Do you have an example of this?

I will make a tutorial soon

What happens to the children of the parent dies? Say you have parent 1 and child1, child2, and child3 is connected to it.

When the parent dies, the child stay live

Does it follow the same path or directions the parrent was programmed to do?

Yes, All children moves will be relative to parent

So if the parent dies and the parent was set to move a certain direction, the children associated with the parent still move in the direction the parent was programmed to move. Is this correct?

If a parent die, your children has no more parents.
So, will stop

To see the Space Invaders tutorial, please
update your Game Editor to 1.2.2 version,
updaate your tutorials (Help -> Get Newest Tutorials),
and go to Help -> Demo Making Of -> Space Invaders