Hi All,

I think I know what my problem is but I'm not sure how to get round it! I hope that more (in number and experience) minds are better than one and you can give me some pointers.

I'm trying to put an image of a dashboard in the back ground and animate a needle on the clock to read a value. (these will eventually display values from sensors linked from the arduino board but for now I just have the values changing in processing.

I can code one clock absolutely fine but as I want multiple clock in the same window, I turned it into a function so I can call it multiple times... the strange thing is that while the first clock displays OK when called as a function, the entire second clock rotates around the centre of the first one.

I need to somehow reset the rotation centre for each subsequent instance of the clock.....

..... my code so far is below, the image I used for the background can be downloaded here. I hope someone can help.

1. PImage b;
   int ang_min=-40;
   int ang_max=220;
   int angle1=ang_min;
   float rad1;
   boolean dir1=true;
   
   void setup() {
     size(1000,900);
   }
   
   void draw() {
     if (angle1==ang_max) {
       dir1=true;
     }
     if (angle1==ang_min) {
       dir1=false;
     }
     if (dir1==false) {
       angle1++;
     }
     else {
       angle1=angle1-2;
     }
     rad1=radians(angle1);
     clock(rad1,0,0);
     clock(rad1,0,0);
     //  clock(rad1,200,600);
   }
   
   void clock(float rad, int xpos, int ypos) {
     b = loadImage("clock_bg.jpg");
     image(b, xpos, ypos, 600, 300);
     translate((xpos+300),(ypos+(150-12)));
     stroke(255,0,0);
     strokeWeight(3);
     rotate(rad);
     line(0,0,-65,0);
     stroke(0);
     fill(0);
     ellipse(0,0,10,10);
     translate(((0-xpos)+300),((0-ypos)+(150-12)));
   }
   
   

Hi all, new to processing but having great fun trying out a few basic building blocks on my fist project.

the area I'm stuck with and would appreciate some pointers is I've created the following code to generate 4 colors, then assign a random color to draw 4 blobs. The code is working as I expected but I want to use each of the colors ONLY ONCE hence to have all 4 colors in a different pattern.

I suspect I need to use 'if' or 'while' to test if the first 2 are the same then if the 3rd is same as 1 or 2 etc. I've tried this to no avail so any pointer are welcome.

color cr=color(255,0,0);      //defines RED
color cg=color(0,255,0);      //defines GREEN
color cb=color(0,0,255);      //defines BLUE
color cy=color(255,255,0);    //defines YELLOW
color[] colors = {            //random selects one of above colors
  cr,cg,cb,cy
};
color c1=(colors[int(random(0,4))]);  //assigns a random color from above to c1-4
color c2=(colors[int(random(0,4))]);
color c3=(colors[int(random(0,4))]);
color c4=(colors[int(random(0,4))]);
void setup() {
  size (420,100);                     //screen size
 
}

void draw() {                        //draws 4 ellipses with colors above

  fill (c1);
  ellipse (60,height/2,80,80);
  fill (c2);
  ellipse (160,height/2,80,80);
  fill (c3);
  ellipse (260,height/2,80,80);
  fill (c4);
  ellipse (360,height/2,80,80);
}