implementation of class or structure

nully

hy there, i want to create a variable to store different kind of variables. that i could pass to functions which need more than one parameter. i am looking for something like the "color" class or what it is.______ instead of passing three or four variables you can just pass one color object.

bsp: 
color c = color(204, 153, 0);
background( c);

this is how the color would work and below is what i would like to do. any help is wellcomed, what could also help is how did they implement the "color" class. by the way is it a class or something else. thanks in advance

Func1(String, int, float); // function declaration
myThing mc = myClass("hello", 1,2.0); // object init
func1(mc);  // call function with object as param

nully

the formatting went wrong there , i hope you still understand want i wanted to write

nully

i think i know how they did it with the color, its probaly the fill or background method that's been implemented to accept an object of type color, if anyone knows more, leave a comment

GoToLoop

For correctly formatting posted code here, please highlight it and hit CTRL+K! (%)

GoToLoop

Neither color(), nor fill(), stroke(), background() etc., accept object types. All of them are primitive float data-types!

KevinWorkman

The color "class" in Processing is a special case. Don't look to it for a lot of inspiration, as it'll probably just be confusing.

What you're looking for sounds a lot like a class that encapsulates the different kinds of data you want to group together.

You could also look into varargs.

GoToLoop

This post below got a Colour container: ;;)

http://forum.processing.org/two/discussion/1273/what-is-the-triple_dot-character-and-what-causes-errors-regarding-it

quark

The color "class" in Processing does not exist.

In Processing the color data type is the same as a Java int Before compiling the sketch code the Processing pre-processor replaces all occurrences of color with int. The only exception is when color is followed by a (, in which case it is a call to the color() method.

It is possible to define Java methods that have a variable number of parameters, for example the code below has a method called myMethod where you can pass any number of parameters (including none) of any type.

public void setup() {
  size(200, 200);
  myMethod();
  myMethod("A string", 2.3, true);
}

public void myMethod(Object... params) {
  println("\nNumber of params = " + params.length);
  for (Object param : params)
    println("  " + param.getClass().getSimpleName());
}

This creates the following output

Number of params = 0

Number of params = 3

String

Float

Boolean

KevinWorkman

I think what the OP wants is some basic object oriented programming. I threw together a tutorial going over the basics of OOP in Processing, it might help: http://staticvoidgames.com/tutorials/objects/index.jsp

oana

Also, Dan Shiffman's teaching videos are awesome.

Here he is on objects: http://icm.shiffman.net/7.0/

_vk

Are looking for a function that accepts a custom obj? That's simple:

class Ob{
// all stuff
}

void gimmeSomeOb(Ob instance){
// calcs with  passed instance of Ob
}

// using
Ob o = new Ob();
gimmeSomeOb(o);

also you can return your object in a function.

Ob compareObs(Ob one, Ob other){
// test and 
   return one // of them :  )
    }