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Index › Programming Questions & Help › Syntax Questions › Random Textures.

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Random Textures. (Read 631 times)

jaylfk

Random Textures.
Nov 29^th, 2006, 7:37am

Hi,

i'm trying to randomly map texture on objects, but i can't find the proper command.

I actually would like to do something like this :

Quote:

PImage img0 = loadImage("tex0.png");
PImage img1 = loadImage("tex1.png");
PImage img2 = loadImage("tex2.png");
PImage img3 = loadImage("tex3.png");
texture(random(img0,img1,img2,img3));

I know this code won't work, because random() is only dealing with numbers.

Any idea ?

matthew.thompson

Re: Random Textures.
Reply #1 - Nov 29^th, 2006, 12:14pm

Hi,

You can simply make a PImage array as follows:
Code:


PImage img0 = loadImage("tex0.png"); 
PImage img1 = loadImage("tex1.png"); 
PImage img2 = loadImage("tex2.png"); 
PImage img3 = loadImage("tex3.png"); 

PImage[] images = new PImage{img0, img1, img2, img3};

// retrieve random 0..3 element of the array
PImage texture = images[(round(random(0,3))];

Hope that helps

jaylfk

Re: Random Textures.
Reply #2 - Nov 29^th, 2006, 4:59pm

Tried, but it doesn't work as i get an error message ( unexpected token: { )pointing at

Quote:

PImage[] images = new PImage{img0, img1, img2};

Here is the portion of the code where i put your example :

Quote:

PImage img0 = loadImage("skin0.png");
PImage img1 = loadImage("skin1.png");
PImage img2 = loadImage("skin2.png");
PImage[] images = new PImage{img0, img1, img2};
PImage texture = images[ round(random(0,2))];
void getFrogs(){
float[] pos;
textureMode(NORMALIZED);
beginShape();
texture(images);
........
}

So after reading the PImage reference section, i changed the {} by ().

Now i get :

Quote:

/tmp/build40927.tmp/Temporary_5188_8530.java:36:23:36:50: Semantic Error: No applicable overload was found for a constructor with signature "PImage(processing.core.PImage, processing.core.PImage, processing.core.PImage)" in type "processing.core.PImage". Perhaps you wanted the overloaded version "PImage(int $1, int $2, int $3);" instead?

/tmp/build40927.tmp/Temporary_5188_8530.java:242:13:242:18: Semantic Error: No accessible field named "images" was found in type "Temporary_5188_8530$Frogs".

What's wrong with it ?

matthew.thompson

Re: Random Textures.
Reply #3 - Nov 29^th, 2006, 5:54pm

Sorry about the faulty syntax. What I meant to do is declare a PImage array literal, which the curly braces do in java, which is not my usual language, so I forgot the exact syntax of it.

Here's what you want:

Code:


PImage img0 = loadImage("skin0.png"); 
PImage img1 = loadImage("skin1.png"); 
PImage img2 = loadImage("skin2.png"); 
PImage[] images = {img0, img1, img2}; 

 void getFrogs(){ 
    float[] pos; 
    textureMode(NORMALIZED); 
    beginShape();  
    texture(images[ round(random(0,3))] ); 
    ........ 
  }

This should work as you intended. You can learn more about arrays at http://www.scit.wlv.ac.uk/~jphb/java/arrays.html or just google it--they're a fundamental and powerful concept in programming, so become well versed in them, as they come up a lot.

jaylfk Senior Member Offline Posts: 253	Re: Random Textures. Reply #4 - Nov 29^th, 2006, 6:21pm WOW, it's working like a charm ! Thank you so much

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