Preloading problem with processing.js

cremisi

Preloading problem with processing.js

in Processing with Other Languages • 7 months ago

I'm not able to load any kind of file when trying to put my processing sketch into a webpage.
Even the simplest program, like the one below, won't load anything, and I'm not able to point the problem. I've tried reading other people's similar topics, but the solutions they find don't seem to work for me.
mind that prova.jpg and processing.js are in the same directory.
what am I doing wrong?

/* @pjs preload = "prova.jpg"; */
void setup () {
size (600, 600);
PImage prova = requestImage("prova.jpg");
}
void draw () {
background(0);
image(prova, 0, 0);
}

Replies(1)

GoToLoop

Re: Preloading problem with processing.js

7 months ago

For a variable to be used across your sketch, that is, in more than 1 function,
you have to declare them as a global field variable!

I see that you're declaring variable prova within function setup(),
and trying to use it in another function -> draw()!

Doing so, prova becomes a local variable, scoped to function setup().
And ceases to exist, losing everything stored in it, once setup() is done!

To fix it, declare prova outside any functions, preferably, just above setup()!

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