Genki-JAM

Hi, all. I'm working on a Max patch for one of my classes and I need some help since I'm really not that great with this program. What I'm trying to make is an interface that allows me to control a video. Using a webcam and a tracking program, I'm trying to get it to follow an LED bike light I have (this works well in the dark, but when there's any low lighting, it has a hard time following).

Basically, I want to make it so when my light is withing specific dimensions, bangs happen to trigger my play/pause/rewind/fforward functions. The problem right now is, I can't figure out the phrasing I need for putting something within a specific range. For instance, my code currently says "if $i1 > 10 && $i2 > 10 then bang" but I want to modify it to say "if input 1 is >30 but

Hopefully I'm making some sense and you guys can help me out.

Basically, I want to make it so when my light is withing specific dimensions, bangs happen to trigger my play/pause/rewind/fforward functions. The problem right now is, I can't figure out the phrasing I need for putting something within a specific range. For instance, my code currently says "if $i1 > 10 && $i2 > 10 then bang" but I want to modify it to say "if input 1 is >30 but 

need-help-with-specifying-dimension-statements

Have a look at this patch, I don't know if this is what you are looking for. Here I calculate the size of the light, then the "area" in pixels of the blob, and then I make the "if" statements with different thresholds. I add a [change] object to avoid repetition and send unnecessary messages to [jit.qt.movie].

Of course there might be nicer, simpler solutions. Also have a look at the jit.cv library, it is specially made for object tracking

Hi Genki-JAM
Have a look at this patch, I don't know if this is what you are looking for. Here I calculate the size of the light, then the "area" in pixels of the blob, and then I make the "if" statements with different thresholds. I add a [change] object to avoid repetition and send unnecessary messages to [jit.qt.movie].

Cool, this is definitely something I will toy around with. I'll see how this works out later today when I can get in a room with low lighting. Might be popping back in later.

Hmm, it seems like this works pretty well, but I can't actually specify when I want specific bangs to happen when the light is in specific areas. Like if I want to have it trigger if the light goes into the upper-right corner, it's just going to do the same thing it would do anywhere else if the pixel size remains the same.

Okay, new problem. I've got everything but the Fforward working now. Every time I try to set coordinates for it, I get a stack overflow message. I'm soooo close now, too since this is the only other thing I need working. I wanted to put it in the corner opposite to the rewind.

Correction, I am dumb. I had something looping that was creating a horrible black hole of stack overflow.

Just a small detail: I would connect your [if] statements to the first [expr] objects (see patch below). These objects are already calculating for you the exact position of the light in the screen.

Need help with specifying dimension statements