Falling Image Collision Problem

[iSdkDev]

Hi
Okay so i have a game & i want that random images should fall from top of the screen to the bottom & when it collides with an image that is already placed CGRect collision should happen.So how should i make images fall & apply CGRect.Please can you help me?

Thanks
Peace

[DaveM]

Apply a downward velocity to your object's location and then check for collisions with other objects.

[iSdkDev]

Originally Posted by DaveM

Apply a downward velocity to your object's location and then check for collisions with other objects.

Can you explain it in a better way with an example please?

[smasher]

These two threads should help you out:
Random rocks:
iPhone Dev SDK Forum - Powered by vBulletin

Adding Stopped blocks:
iPhone Dev SDK Forum - Powered by vBulletin

If you tried that and it didn't work, please say what part didn't work.

[iSdkDev]

//UnViewAble Content//

[smasher]

Originally Posted by iSdkDev

@SMASHER OR ANY1ELSE "Ok soo i did this code and i have those images falling but there's a bug!I have a label that turns to 1 from 0 when that falling image collides with an image below BUT there is a bug when i starts falling down it just automatically adds 1 to my label where as i want tht 1 to add only when it collides!!Please help"
Here is the code

First, all of this [self performSelector] is not necessary. Just call [self change] and [self change1] . If that gives you warnings, then you're not declaring your methods in the .h like you should. That's probably not causing this problem, but it'll make everything more readable and save you other trouble.

Your CGRectIntersectsRect code looks OK. Do cloud and banana have the same immediate parent view, or is one of them the subview of some other subview? That would keep the frames from being compared correctly -- one would be in the wrong coordinate space.

If that's OK, then log the frames and tell me what you're getting.

if(CGRectIntersectsRect(cloud.frame, banana.frame)) {

NSLog(@"cloud %f,%f  %f,%f", cloud.frame.origin.x, cloud.frame.origin.y, cloud.frame.size.width, cloud.frame.size.height);

NSLog(@"banana %f,%f  %f,%f", banana.frame.origin.x, banana.frame.origin.y, banana.frame.size.width, banana.frame.size.height);

     [self change];

     mainInt += 1;
     label.text = [NSString stringWithFormat:@"%d" , mainInt];
     [self UpdateINT];
}

Also make sure this bit of code is really the problem; comment out mainInt+=1 and make sure the problem goes away.

[iSdkDev]

The [self change] or [self change1] is just for the game loop and
No everything is in one view, there are no subviews or
Parent views in the game play!!Now what 2 do?

[smasher]

Originally Posted by iSdkDev

The [self change] or [self change1] is just for the game loop and
No everything is in one view, there are no subviews or
Parent views in the game play!!Now what 2 do?

Log the frames using the NSLog lines I wrote, and tell me what you're getting. Did you temporarily comment out mainInt+=1 and make sure the problem goes away? You want to make sure we're looking in the right place.