# How do I make an array method?
**URL:** https://discourse.processing.org/t/how-do-i-make-an-array-method/42286
**Category:** Coding Questions
**Created:** [June 24, 2023, 5:57pm UTC](https://discourse.processing.org/t/how-do-i-make-an-array-method/42286 "2023-06-24T17:57:08Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Random\_Ghost](https://discourse.processing.org/u/Random_Ghost)
#### Post date: [June 24, 2023, 5:57pm UTC](https://discourse.processing.org/t/how-do-i-make-an-array-method/42286/1 "2023-06-24T17:57:08Z")
I am currently trying to make a CImage class similar to the PImage class. But I want to have a method for accessing pixel values from the image array in the form img.pixels[y].
How do I set up the method that way?
Here’s the some of the code
```auto
class CImage{
C3[][] cImageArray;
int width;
int height;
CImage (PImage img){
width = img.width;
height = img.height;
cImageArray = new C3[width][height];
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
cImageArray[x][y] = new C3(img.pixels[index(x, y, width)]);
}
}
}
/*
C3 getC3[x][y]{
return imageArray[x][y];
}
*/
PImage toPImage(){
PImage img = new PImage(width, height, RGB);
for(int y = 0; y < height; y++){
for(int x = 0; x < width; x++){
img.pixels[index(x, y, width)] = cImageArray[x][y].toColor();
}
}
return img;
}
}
```
It’s the getC3 method. Or do I just use object.cImageArray[y]?
I am also trying to make a set C3 method in that fashion.
---
### Author:  [@Chrisir](https://discourse.processing.org/u/Chrisir)
#### Post date: [June 24, 2023, 7:31pm UTC](https://discourse.processing.org/t/how-do-i-make-an-array-method/42286/2 "2023-06-24T19:31:38Z")
when you check out the reference you’ll see, pixels is an 1D (list) of color
see [PImage::pixels[] / Reference / Processing.org](https://processing.org/reference/PImage_pixels.html)
instead of a list you plan to use a grid. Which is ok.
Instead of
> [@Random\_Ghost](#):
>
> ```auto
> class CImage{
> C3[][] cImageArray;
> int width;
>
> ```
try
```auto
class CImage{
color[][] cImageArray;
int width;
```
**Later**
and later
```auto
CImage (PImage img){
width = img.width;
height = img.height;
cImageArray = new color[width][height];
```
**Remark**
this
> [@Random\_Ghost](#):
>
> ` cImageArray[x][y] = new C3(img.pixels[index(x, y, width)]);`
can be
` cImageArray[x][y] = img.pixels[x + y *width] ;`
The formula `x + y *width` can be found here: [set() / Reference / Processing.org](https://processing.org/reference/PImage_set_.html)
You try C3 which is unnecessary you can stick with color.
Warm regards,
Chrisir
---
### Author:  [@Chrisir](https://discourse.processing.org/u/Chrisir)
#### Post date: [June 24, 2023, 7:47pm UTC](https://discourse.processing.org/t/how-do-i-make-an-array-method/42286/3 "2023-06-24T19:47:07Z")
an array is not a method it’s a data structure
cf. [Arrays / Processing.org](https://processing.org/tutorials/arrays)
cf. [Two-Dimensional Arrays / Processing.org](https://processing.org/tutorials/2darray)
---
### Author:  [@Chrisir](https://discourse.processing.org/u/Chrisir)
#### Post date: [June 24, 2023, 7:55pm UTC](https://discourse.processing.org/t/how-do-i-make-an-array-method/42286/4 "2023-06-24T19:55:00Z")
> [@Random\_Ghost](#):
>
> ```auto
> C3 getC3[x][y]{
> return imageArray[x][y];
> }
>
> ```
try
```auto
color getColorFromImageArray (int x, int y) {
return imageArray[x][y];
}
```
(Same would apply when you use C3 instead of color btw)
---
### Author:  [@Random\_Ghost](https://discourse.processing.org/u/Random_Ghost)
#### Post date: [June 24, 2023, 8:25pm UTC](https://discourse.processing.org/t/how-do-i-make-an-array-method/42286/5 "2023-06-24T20:25:27Z")
Yes, that is the method I used. I created an index method to calculate the index in the pixel array. And I am using a C3 class as a replacement for the color class also.
I think I’d just use `object.cImageArray[x][y]` instead as this is similar to the `object.pixels[x]` in the PImage class.
Thanks for your help though.