How to use

sq

method

in

processing.core.PApplet

static public final float dist(float x1, float y1, float z1,
                float x2, float y2, float z2) {
  return sqrt(sq(x2 - x1) + sq(y2 - y1) + sq(z2 - z1));
}

static public final float dist(float x1, float y1, float x2, float y2) {
 return sqrt(sq(x2-x1) + sq(y2-y1));
}

static public final float dist(float x1, float y1, float x2, float y2) {
  return sqrt(sq(x2 - x1) + sq(y2 - y1));
}

/**
  * ( begin auto-generated from dist.xml )
  *
  * Calculates the distance between two points.
  *
  * ( end auto-generated )
  * @webref math:calculation
  * @param x1 x-coordinate of the first point
  * @param y1 y-coordinate of the first point
  * @param z1 z-coordinate of the first point
  * @param x2 x-coordinate of the second point
  * @param y2 y-coordinate of the second point
  * @param z2 z-coordinate of the second point
  */
 static public final float dist(float x1, float y1, float z1,
                 float x2, float y2, float z2) {
  return sqrt(sq(x2-x1) + sq(y2-y1) + sq(z2-z1));
 }

(PApplet.sqrt(4 + 3 * PApplet.sq(PApplet.tan(inc / 2))) - 1) / 3;