how do you put a counter on any array?

Core Library Questions

jmrclem

how do you put a counter on any array?

in Core Library Questions • 5 months ago

i am a grad student and new to processing
i am working on a piece with an array of video clips
i want the array to be accessed consecutively until the array has been completed at which point it would begin at zero
again
at the moment the mouse press sets it back to the beginning
i am not sure how to fix this
can anyone help?
please find my code below
thanks

import processing.video.*;

int maxmyMovies=5
; //total # movies
int myMoviesIndex=0; //initial movie to be displayed

Movie[] myMovies = new Movie[maxmyMovies] ; //declare array of movies

boolean someoneIsThere = false;

void setup( ){

size(1280, 720);
   for (int i=0; i<myMovies.length; i++) {
    myMovies[i] = new Movie(this, "trans"+i+".mov"); //loading movies into the array
}
myMovies[myMoviesIndex].loop(); //play the first movie
}
void draw() {
image(myMovies[myMoviesIndex], 0, 0, 1280, 720);   //display one movie

if (myMovies[myMoviesIndex].time() >= myMovies[myMoviesIndex].duration()) {
    // the current movie is done

    if (someoneIsThere) {
      nextMovie();
      someoneIsThere = false;
    }
    else {
      myMovies[myMoviesIndex].stop(); // stop the current movie
      myMoviesIndex = 0;
      myMovies[myMoviesIndex].loop();
    }
}

fill(255);
text(myMovies[myMoviesIndex].time(), 30, 30);
text(myMovies[myMoviesIndex].duration(), 30, 60);
}

void movieEvent(Movie myMovies) {
myMovies.read(); //read new frames from movie
}

void mousePressed() {
someoneIsThere = true;
}

void nextMovie() {
myMovies[myMoviesIndex].stop(); // stop the current movie
myMoviesIndex=(myMoviesIndex+1) % myMovies.length; //increment movie by one and return to zero once size of array is reached
myMovies[myMoviesIndex].play(); // play the next movie
}

Replies(4)

asimes

Re: how do you put a counter on any array?

5 months ago

I don't use that library, but it looks like what you are looking for is modulo: http://processing.org/reference/modulo.html

Use it like this:

Copy code

int index = 0;
// A sample list in alphabetic order to show modulo working below
String[] example = {
"Apple", "Banana", "Cranberry", "Durian", "Entawak"
};
void setup() {
size(100, 100);
}
void draw() {
int loopedIndex = (index % example.length);
println(index+", "+example[loopedIndex]);
index++;
}

jmrclem

Re: Re: how do you put a counter on any array?

5 months ago

it was already looping through the array
but i am trying to get it to pick up at the next point in the array
as the mouse is pressed or not pressed
i.e. it is a linear string of video clips which can be interrupted and then pick
up at the next point in the array
i hope that makes sense?

v.k.

Re: how do you put a counter on any array?

5 months ago

I think the problem is at line " myMoviesIndex = 0;" and also the chain of testing is a bit confused ... well an example says more than a thousand words :) I'm not testing if some one is there as mouse can't be pressed by some ghost, maybe a robot, but not a ghost... so i called nextMovie straight form mousePressed.

Copy code

import processing.video.*;
int maxmyMovies=3; //total # movies
int myMoviesIndex=0; //initial movie to be displayed
Movie[] myMovies = new Movie[maxmyMovies] ; //declare array of movies
boolean movieDone = false;
void setup( ) {
size(1280, 720);
for (int i=0; i<myMovies.length; i++) {
myMovies[i] = new Movie(this, "comedy"+nf(i, 2)+".mov"); //loading movies into the array
}
myMovies[myMoviesIndex].loop(); //play the first movie
}
void draw() {
image(myMovies[myMoviesIndex], 0, 0, 1280, 720); //display one movie
if (myMovies[myMoviesIndex].time() >= myMovies[myMoviesIndex].duration()) {
// the current movie is done
myMovies[myMoviesIndex].stop(); // stop the current movie
movieDone = true;
}
fill(255);
text(myMovies[myMoviesIndex].time(), 30, 30);
text(myMovies[myMoviesIndex].duration(), 30, 60);
}
void movieEvent(Movie myMovies) {
myMovies.read(); //read new frames from movie
}
void mousePressed() {
if(movieDone){
nextMovie();
movieDone = false;
}
}
void nextMovie() {
myMovies[myMoviesIndex].stop(); // stop the current movie
myMoviesIndex=(myMoviesIndex+1) % myMovies.length; //increment movie by one and return to zero once size of array is reached
myMovies[myMoviesIndex].play(); // play the next movie
}

jmrclem

Re: how do you put a counter on any array?

5 months ago

vk,
thanks
the mouse pressed is a sub in for a sensor
eventually the piece will be activated by someone being there and not the mouse press
sorry am inarticulate (learning the language)
appreciate the help
clem

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