Add Backdrop goes nuts in middle of a fastloop

[chrilley]

Hello,

I am trying to generate random terrain by running a fastloop at the start of the frame, like this:

* Set up a frame 10 000 x 480 pixels
* Create one active object and call it terrainObject, size: 1x300pixels

Then create 2 events:
+ Start of frame
- Run loop "level" 9 999 times.

+ On loop "level"
- terrainObject: Set position X to itself + 1 pixel.
- terrainObject: Add backdrop as obstacle.

Add an event for you to scroll the frame area then run the app.

The terrain is fine for the first 1000 pixels or so, but suddenly it goes invisible. The colision mask is there though, since the player can walk above were the terrain was supposed to be.

[UltimateWalrus]

When you Add Backdrop, you're actually creating a backdrop object that has to get rendered every time the camera scrolls. MMF can only handle so many backdrop objects, so it's probably limiting the amount you can create.

You gotta use paste into background instead. Unfortunately, it'll disappear when you scroll away.

If you gotta have scrolling, I'd use the Overlay Redux object instead of MMF's background functions.

[chrilley]

Really? I didn't know there was a limit to backdrops. Does that just go for backdrops created during runtime? Does someone here know of how many I can create?

As for the problem, I guess I could use paste to background, I'll just have to make the game generate the level at runtime instead of at the beginning. It'll work since the player can't go back to were he once left anyway.

Thanks for the tip!

[DavidN]

The limit is the same as for active objects - increase the object count in the frame properties and you should be able to get more of them.

[nivram]

UltimateWalrus, I didn't think the overlay redux supported scrolling.

Marv

[Tisnart]

chrilley,
I made you an example here

[UltimateWalrus]

UltimateWalrus, I didn't think the overlay redux supported scrolling.

Marv

You gotta use the Active Overlay object. I forgot to mention that

[chrilley]

It's alright guys, Paste to background will suffice, I got it working just as I want it.

chrilley,
I made you an example here

That's pretty much the method I used before but it doesn't work well for the pixel size I'm after. I want a non-blocky level, more like smooth terrain, with hills and such. I should probably have mentioned that in the first post. Thanks anyway for taking time making an example

[Tisnart]

I guess I must of misunderstood what you wanted, but i'm glad you got it working