The constructor Detector(rotoTest05.Rotor, int, int, int, int, int) is undefined

clankill3r

The constructor Detector(rotoTest05.Rotor, int, int, int, int, int) is undefined

in Contributed Library Questions • 2 years ago

i'm using blobscanner:

http://forum.processing.org/topic/new-blob-detection-and-analysis-image-labelling-and-segmentation-library-for-processing

I want to track different areas from a webcam, i got the different part things working so far.

Every part is a class.

Normally the constructor for a detector (for blobs) is:

void setup(){

size(320, 240);

frame = new Capture(this, width, height);

bd = new Detector( this, 0, 0, frame.width, frame.height, 255 );

}

this is then the sketch i believe?

I want my detector in a class

bd = new Detector(this, 0, 0, Width, Height, 255 );

only it throws up:

The constructor Detector(rotoTest05.Rotor, int, int, int, int, int) is undefined

rotoTest05 is the sketch name and Rotor is the class.

How can i solve this?

Replies(2)

shiffman

Re: The constructor Detector(rotoTest05.Rotor, int, int, int, int, int) is undefined

2 years ago

The problem is that "this" refers to whatever class you are currently in, when you say "this" in the main tab, you are talking about your Processing sketch (i.e. PApplet) and that's what Detector expects. When you say "this" in a class, you are talking about that class. You can get around this by having a global variable:

PApplet me;

void setup() {

me = this;

}

and then in your class say:

bd = new Detector(me, 0, 0, Width, Height, 255 );

There are some risks to doing this depending on the library's implementation, but hopefully it will work out for you!

clankill3r