PolygonPaint

PImage img;

int smallPoint, largePoint;

float pointSize = 10;

​

float sizeSlideX=80;

float sidesSlideX=310;

​

void setup() {

  size(600, 600);

  img = loadImage("image.jpg");

  imageMode(CENTER);

  noStroke();

  background(0);

}

​

void draw() { 

  //Slider and button logic

  if (mousePressed) {

    if (mouseY > 0 && mouseY < 50) {

       if(mouseX>=80 && mouseX<=200){

         sizeSlideX = mouseX;

       } else if(mouseX>=310 && mouseX<=430){

         sidesSlideX = mouseX;

       } else if (mouseX > 500) {

         background(0);

       }

    }

  }

  //Paint at random point

  noStroke();

  int x = int(random(img.width));

  int y = int(random(img.height));

  color pix = img.get(x, y);

  fill(pix, 50);

  pointSize = map(sizeSlideX, 80, 200, 0, 30);

  float nsides = map(sidesSlideX, 310, 430, 3, 10);

  //make particle

  polygon(int(nsides), x, y, pointSize);

  polygon(int(nsides), x, y, 2*pointSize/3);

  polygon(int(nsides), x, y, pointSize/3);

  //draw Gui

  fill(0,10);

  rect(0,0,width,50);

  fill(255,50);

  text("Size", 20, 25);

  text("Sides", 250, 25);

  text("Clear", 550, 25);

  stroke(50);

  strokeWeight(15);

  line(80,20,200,20);

  line(310,20,430,20);

  noStroke();

  fill(255,200);

  ellipse(sizeSlideX,20,13,13);

  ellipse(sidesSlideX,20,13,13);

  //

}

​

//make polygon

void polygon(int n, float cx, float cy, float r)

{

  float angle = 360.0 / n;

​

  beginShape();

  for (int i = 0; i < n; i++)

  {

    vertex(cx + r * cos(radians(angle * i)),

      cy + r * sin(radians(angle * i)));

  }

  endShape(CLOSE);

}

​

​