/* built with Studio Sketchpad: 
 *   https://sketchpad.cc
 * 
 * observe the evolution of this sketch: 
 *   https://playgramming.sketchpad.cc/sp/pad/view/ro.LPpyb3g1rr6/rev.76
 * 
 * authors: 
 *   Devon Scott-Tunkin

 * license (unless otherwise specified): 
 *   creative commons attribution-share alike 3.0 license.
 *   https://creativecommons.org/licenses/by-sa/3.0/ 
 */ 



// Processing Book, Casey Reas, pg. 280 Motion 1: Lines, Curves

float x = 20.0; // Initial x-coordinate
float y = 10.0; // Initial y-coordinate
float targetX = 70.0; // Destination x-coordinate
float targetY = 80.0; // Destination y-coordinate
float easing = 0.05; // Size of each step along the path

void setup() {
    size(100, 100);
    noStroke();
    smooth();
}

void draw() {
    fill(0, 12);
    rect(0, 0, width, height);
    float d = dist(x, y, targetX, targetY);
    
    // Easing slows down the movement as it gets closer
    if (d > 1.0) {
        x += (targetX - x) * easing; 
        y += (targetY - y) * easing;
    }
    fill(255);
    ellipse(x, y, 20, 20);
}