Is it possible to pass PImage as a parameter?

evilhatter

Is it possible to pass PImage as a parameter to ? Than just use a boolean when I want to load or reload it.

ex: void name(PImage something){}

Chrisir

yes

evilhatter

How i cant seem to make it work?

jeremydouglass

Yes.

In fact, notice that in the PImage example, you are passing a PImage named photo as a parameter to the image() function.

void image(PImage img, float x, float y){}

evilhatter

this is what i tried. it said the float did not work

void setup(){
size(600,600);
}

void draw(){
bob("https://processing.org/reference/images/PImage.png",0,0);
}

void bob(PImage img, int x, int y){
img = loadImage(img);
image(img, x, y);
}

Chrisir

PImage img; 

void setup() { 
  size(600, 600);

  img = loadImage("https://processing.org/reference/images/PImage.png");
}

void draw() { 
  bob(img, 0, 0);
}

void bob(PImage img, int x, int y) { 
  image(img, x, y);
}

evilhatter

i am trying to load what i put into the function and move away from putting things in setup

GoToLoop

setup() is the correct place to load any resources the sketch's gonna need.
Of course you can create separate functions to deal w/ loading stuff, but they still should be called from within setup().

Also notice loadImage() only accepts String arguments:
https://Processing.org/reference/loadImage_.html

Chrisir

You can load a lot into an array

Then we can just use the index of the array

jeremydouglass

There are tons of reasons to pass around PImages and encapsulate what you do with them in functions. But sometimes, you want to call those functions from setup.

In general: "NEVER load images from draw"

Chrisir

You can of course call bob from draw() but if you do, remember that draw runs 50 times per second.

So once you've called bob, set a boolean, that it's loaded and we don't want to load it again (check the boolean with if in bob)

Also, you have to pass a string to bob when you want to use it in bob with loadImage

so String imgName

and PImage img are different things in bob

bob could also return a value img to draw to let the img -- to let img be of global scope

But all this makes sense when you tell us what you are up to

I also noticed that a lot of questions from you didn't get an answer, so shame on us. PM me when you need more