Processing, Line Drawing Program With Conditional Colors, Default Stroke Width

linedraw.pde

//draw a contiuous line


int r = 0;
int g = 0;
int b = 0;

void setup() {
  size(500, 500);
  background(0, 0, 0);
}

void draw() {
  println("Mouse X: " + mouseX + " Mouse Y: " + mouseY);
}


void mouseDragged() {
  //check if the previous mouse x position was on the screen of the x axis
  if (pmouseX > 0 && pmouseX < width) {

    //check if the previous mouse y position was on the screen of the y axis
    if (pmouseY > 0 && pmouseY < height) {
      lineDraw(5);
    }
  }
}

void lineDraw(int numberOfLines) {
  strokeWeight(5);
  for (int i = 0; i < numberOfLines; i++) {
    stroke(r, g, b);
    line(pmouseX + (i * 5), pmouseY+ (i * 5), mouseX+ (i * 5), mouseY+ (i * 5));
  }
  r = r + 1;
  g = g + 30;
  b = g + 70;

  if (r > 255) {
    r = 0;
  }
  if (g > 255) {
    g = 0;
  }
  if (b > 255) {
    b = 0;
  }

}