Personally, I fail to see the connection between noise and collision detection. If you could enlighten us...

It's simple, really: for instance, while driving a car, you may hear screams, muffled thumps, or splintering/cracking noises.  These indicate collisions.

seriously, though, if you mean this post:
http://processing.org/discourse/yabb2/num_1253661731.html
the collision detection discussed isn't facilitated by the noise per se, that's just how the terrain is generated.  The collision detection amounts to "if the player's Z var is dropping under the height (Z) of the noise/terrain map point at that (X,Y) location, that's a collision."

Once you generate your heightmap, you can store it any way you like, though I don't see why checking Z value at the ball's (x,y) wouldn't work for you...

--Ben

Hi BenHem, yup that was the topic I was referring to  

Well since each x and y-coordinate at any point on the sketch is assigned with a value via noise(), I thought that to check for collision, one simply needs to match that particular value with the noise values for a moving ball, i.e.

//x and y coordinates of ball;
float ball_x, ball_y;
//x and y coordinates of rect;
float rect_x, rect_y;

float noiseBall = noise(ball_x, ball_y);
float noiseSquare = noise(square_x, square_y);

if (noiseBall == noiseSquare)
println("collision!);

I guess I'll try to understand how noise() works further

Thank you!

Tim.

Hello PhiLho,

Thanks for the list! I think these are the reasons why the sketch isn't working as well as I hoped it would, and I would have taken a loooong time to figure out why if you haven't shared that. Thank you!

Tim.