Bouncing ball?

Hello.

I'm trying to make a ball bounce like in the game Bubble Struggle 2: Rebubbled (www.rebubbled.com).

I've choosed the Pinball movement type, set gravity and speed to 25 and set initial direction to: -0,16.

But after some time it stop bouncing around and sometimes it changes the direction before it hit the left and right walls.

The Event condition I've made is: when Ball leaves the play area, then Bounce.

But as I said, it doesn't bounce as I want it to be. I want it to be like Bubble Struggle 2: Rebubbled.

Can anyone help me?

The only real use for Pinball movement, and this is just my opinion, and for the most part it doesn't work right anyway, but is slope detection. Seeing as you wont need slopes in this game, heres the best way I found to do movement like this.

Always
Set Ball X to X of Ball + Alterable Value A
Set Ball Y to Y of Ball + Alterable Value B

Always
Add 1 to Alterable Value B

If Ball Collides with Ground
Set Alterable Value B to 16 (Or however high you want.)

Start of Frame
Set Alterable Value A to Random ( 8 ) - 4

If Ball Collides with Wall
Set Alterable Value A to Alterable Value A * -1

Hmm I can't get it to work, I made a new application and added what you said to a Pinball, but it just passes through the ground :S

try setting value B when it hits the ground to negative 16

But I still have to set it to Bounce when it hits the ground right?

no, it's a custom movement.

Edit: I just realized you were using the pinball movement, so yes, you do make it bounce.

Quote:

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Originally Posted by BrandonC

Always
Set Ball X to X of Ball + Alterable Value A
Set Ball Y to Y of Ball + Alterable Value B

Always
Add 1 to Alterable Value B

If Ball Collides with Ground
Set Alterable Value B to 16 (Or however high you want.)

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This will not work very well visually. For instance if the ball starts at the top of the frame and falls to the bottom, Alterable Value B might be something like 5. The ball will skip up to 5 pixels past the top of the wall and land inside it.

What does the Alterable Value (a letter) actually mean?

Each active object (and many other objects) contain alterable values. These are basically a set of numbers assigned to that unique object. So if you set Value A to 3 at the start of a level, then subtracted 1 from that each time you shoot at the object. Then when Value A = 0 you can destroy it. The object will take three hits to destroy.

You can access them through the even editor and the object properties.

But how does the Alterable Values work do with the Pinball project I'm trying to make? The ball is not supposed to get destroyed, so why use Alterable Values?

Or is it possible to make a gravity on a normal ball? not on a pinball. Or what's the best solution?

When making games in MMF2, it's nice to have the default movement there so that you can learn. As you start getting more into MMF though, and wanting to make slightly more complex and more professional feeling games, it starts to become rather essential to start learning for better methods to do stuff like this. Here, I made an example of the movement you're trying to accomplish.

http://arcanetale.sitesled.com/BouncingBall.mfa
Enjoy, it's fully commented.
Please check this out, especially if you don't understand how alterable values co-inside with motion in MMF2.

PS: Also, please do not claim default movement is better, cause it's not. It's just easier, and looks like a complete mess when you release anything.

Woah thanks that's very nice! But you didn't give me a ball with gravity hehe, I guess you want me to figure that out myself? Well I got a game development book (for Flash, but it's the same theories for all) which teach how to make balls jump and bounce realistic, so I guess I can handle this.

Umm, what do you mean I don't give you a ball with gravity? The fact that it falls, gives you the gravity effect. You control the gravity in the events. If you read the comments, you'll see where it says the gravity is. Right now it's at 0.25 every loop. If you raise that up, the gravity is higher and the ball falls much faster and bounces lower.

If you're adding the value to the Y position of the ball, then positive values make it go down.
0
2
4
8
16
This shows the ball falling down faster and faster.
Now when it comes in contact with the ground, if you turn 16 to -16, it immediately changes from down to up and since you're adding to it, -16 slowly starts going up.
-16
-8
-4
-2
Slowing down as it's going up, then starting it's downward decent again.

In my example, I decided not to do -16 though, because it was kind of limiting. Instead, I took the value, and multiplied it by -1, so that whatever number it was at when it hit the ground, it negated. Then it subtracted it by 1, so it didn't bounce up higher each time. If you wanted to make a ball that bounced so that each hill was lower and lower, then change the amount subtracted from 1 to 2 or 3. The higher, the lower each one is.

You gave me a ball that moved from side to side, but it didn't go up and down, but it's okay your app helped me a lot. But what does the NObject thing?

I made a custom pinball movement once. It had a ball with gravity. I think I may have posted it in the forums: if not I'll try to make my parents let me on my laptop so I can post it.

well I'm on my iPod-touch so I can't copy and paste the URL but if you search for pinball type movement in seven events

then display name search of
: falkon

and only search in mmf2 file archives.
it should come up.

I posted it in the mmf2 file forums a while back so you might want to make it so it shows post that are up to 5 years old.

Quote:

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Originally Posted by Iharmi

You gave me a ball that moved from side to side, but it didn't go up and down, but it's okay your app helped me a lot. But what does the NObject thing?

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What do you mean it doesn't go up and down. The ball is bouncing here right in front of my very eyes!
http://i36.photobucket.com/albums/e4...uncingball.jpg

Quote:

---

Originally Posted by falkon

well I'm on my iPod-touch so I can't copy and paste the URL but if you search for pinball type movement in seven events

then display name search of
: falkon

and only search in mmf2 file archives.
it should come up.

I posted it in the mmf2 file forums a while back so you might want to make it so it shows post that are up to 5 years old.

---

Please give me link when your on a computer, I didn't understand :(

Quote:

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Originally Posted by BrandonC

Quote:

---

Originally Posted by Iharmi

You gave me a ball that moved from side to side, but it didn't go up and down, but it's okay your app helped me a lot. But what does the NObject thing?

---

What do you mean it doesn't go up and down. The ball is bouncing here right in front of my very eyes!
http://i36.photobucket.com/albums/e4...uncingball.jpg

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What the ****? It didn't do that when I ran it, it just moved left and right without going up and down :S I just had to Open it and Run Application right?

I wonder if this is the result of using different versions of MMF2... earlier ones had a bug in them that stopped the Add and Subtract from alterable value actions from working correctly with float values. Make sure you're on the latest stable version - 247 - or replace this event with "Always -> Set Alterable Value B to Alterable Value B + 0.25".

Ah yeah I didn't have updated it, I'll update it now.

Edit:

Yeah now it works BrandonC! I just had to update my version, thanks everyone!

One problem I'm grounded so I cant post the link.

One thing I do know is that The

Post number is 48825

So if one of you fortuanate enough to have a computer try to get the example to him I'd appreciate it.

All you really have to do is in the URL where it says &number=????? Change the ????? To 48825