Processing, Line Drawing Program, Conditional Statements

linedraw.pde

//draw a contiuous line

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) {
      stroke(255, 255, 255);
      line(pmouseX, pmouseY, mouseX, mouseY);
    }
  }
  
}