Hi, quick question. Seems like it should be simple, I just can't find an answer after googling and checking my book.

I have this code within my draw() right now:


PImage[] images = { i1, i2, i3 };
int rimage= int(random(images.length));  // this line is wrong


x = random(width);  
y = random(height);  
r = random(0, TWO_PI);
pushMatrix();
translate(x, y);
rotate(r);
image(rimage, -rimage.width/2, -rimage.height/2);
popMatrix();
}




I just need to know how to select a random PImage from the array, and pass it to the image function below.

Thank!

I have a sketch that I made based on some code that I found here a while ago. I think this question has a simple answer, bear with me as I'm not great at programming.

PImage img;

void setup() {
img = loadImage("image.jpg");
size(img.width,img.height);
}

void draw()
{

 
frameRate(30);
loadPixels();
for (int y = 0; y<height; y+=1 ) {
for (int x = 0; x<width; x+=1) {
int loc = x + y*img.width;
float r = red (img.pixels[loc]);
float g = green (img.pixels[loc]);
float b = blue (img.pixels[loc]);
float av = ((r+g+b)/3.0);

pushMatrix();
translate(x,y);
stroke(r,g,b);
strokeWeight(6);

if (r > 100 && r < 255) { 


float h = random(-50, -15);
 

line(0,0,(av-255)/h,0-h);

}

popMatrix();

}
}

 

}


What I've been doing is manually changing the line with if (r > 100 && r < 255) {   and changing the 100 and 255 to smaller ranges, outputting images at the different ranges and making animated GIFs. What I'd like to do is automate this. I tried adding in a for loop, and changing it to

if (r > r1 && r < r2) { 

and then having r1+=15 and r2+=15 at the end of the loop... it just doesn't want to run however. I suspect it's the placement of the loop around the loadPixels? I'm not really sure, any guidance would be greatly appreciated!