Wall ball bounce

Bigs

Source:
http://fileho.com/download/120846695042/bounce2.zip.html

How would I go about making a wall for my bouncing ball?
For example if the ball hit the center box it would bounce.

r035198x

Quote:

Originally Posted by Bigs

Source:
http://fileho.com/download/120846695042/bounce2.zip.html

How would I go about making a wall for my bouncing ball?
For example if the ball hit the center box it would bounce.

Well, I'm not going to download those files and I know a few others who wont as well. It's better if you tell us what characteristics you want your wall to have. The bouncing can be controlled by tracking the position of the ball on the canvas (or whatever it is you are using) and changing the direction of the ball as soon as it enters certain coordinates. You can even make the wall invisible.

Bigs

Quote:

Originally Posted by r035198x

Well, I'm not going to download those files and I know a few others who wont as well. It's better if you tell us what characteristics you want your wall to have. The bouncing can be controlled by tracking the position of the ball on the canvas (or whatever it is you are using) and changing the direction of the ball as soon as it enters certain coordinates. You can even make the wall invisible.

It is a little hard to describe without actually seeing it. Well, basically I have two boxes:

Expand|Select|Wrap|Line Numbers

        g.drawRect(10,0,950,500);

       g.drawRect(350,170,200,150);

One box inside the other, right now the ball will bounce inside the first box, but the part I am having trouble with is making the inside box also make the ball bounce when hit.

For the first box I just took the x or y and then changed direction example:

Expand|Select|Wrap|Line Numbers

 
         if  (x > 910)                 /** bounces back left when x = 910 */   

         {dir = dir - 2;}

But, because the other box is on the inside it will not work. I need to find out how to add walls that the ball will bounce off of. Preferably something that will not require at lot of check for the ball going into a certain point. But, anything that works would be great.

r035198x

Quote:

Originally Posted by Bigs

It is a little hard to describe without actually seeing it. Well, basically I have two boxes:

Expand|Select|Wrap|Line Numbers

      g.drawRect(10,0,950,500);

     g.drawRect(350,170,200,150);

One box inside the other, right now the ball will bounce inside the first box, but the part I am having trouble with is making the inside box also make the ball bounce when hit.

For the first box I just took the x or y and then changed direction example:

Expand|Select|Wrap|Line Numbers

 
if (x > 910) /** bounces back left when x = 910 */ 

{dir = dir - 2;}

But, because the other box is on the inside it will not work. I need to find out how to add walls that the ball will bounce off of. Preferably something that will not require at lot of check for the ball going into a certain point. But, anything that works would be great.

I still don't get the problem. What's different for the second box except for the co-ordinates? Can't you do it the same way you did with the first box?

Bigs

Quote:

Originally Posted by r035198x

I still don't get the problem. What's different for the second box except for the co-ordinates? Can't you do it the same way you did with the first box?

The box is inside the other box. The reason I cant do it the same way is because it would be blocking the ball from moving freely in the first box because it would section off the entire area from that point. Think of it this way I have a pool of water and there is an island inside the pool.

r035198x

Quote:

Originally Posted by Bigs

The box is inside the other box. The reason I cant do it the same way is because it would be blocking the ball from moving freely in the first box because it would section off the entire area from that point. Think of it this way I have a pool of water and there is an island inside the pool.

Ok. What's wrong with using :
The leftmost side of the box is at 350 + 200 = 550.

Expand|Select|Wrap|Line Numbers

  if (x > 550) /** bounces back left when x = 550 */  { 
 
dir = dir - 2;
 
}

Bigs

It is because it is still counting for both inside and outside, box.
For example it may hit the inside box point and bounce but the program is also considering the entire point from there on. Making a line across causing the ball to bounce before it touches an outside corner as well. Bouncing off nothing.

Could you please look at the full program code, it is kind of hard to explain in words.

r035198x

Quote:

Originally Posted by Bigs

It is because it is still counting for both inside and outside, box.
For example it may hit the inside box point and bounce but the program is also considering the entire point from there on. Making a line across causing the ball to bounce before it touches an outside corner as well. Bouncing off nothing.

Could you please look at the full program code, it is kind of hard to explain in words.

So you don't want the ball to get into the inner box?
You need to test both the x position and the y position deepending on the direction of the ball. e.g if the ball is travelling from left to right, do

if x >= 550 and if y is between 20 and 170 then move the ball back to the left

Wall ball bounce

re: Wall ball bounce

re: Wall ball bounce

re: Wall ball bounce

re: Wall ball bounce

re: Wall ball bounce

re: Wall ball bounce

re: Wall ball bounce

Similar Java bytes

/bytes/development

/bytes/it

/bytes/about