1 files changed, 26 insertions, 0 deletions
diff --git a/attractors4/particle.js b/attractors4/particle.js
new file mode 100644
index 0000000..ac09423
--- /dev/null
+++ b/attractors4/particle.js
@@ -0,0 +1,26 @@
+( function() {
+
+function Particle( x, y ) {
+  this.x = x;
+  this.y = y;
+  this.velocity = 0;
+  this.accel = 0;
+}
+
+var friction = 0.3;
+
+
+Particle.prototype.update = function() {
+  this.velocity += this.accel;
+  this.velocity *= ( 1 - friction );
+  this.x += this.velocity;
+  this.accel = 0;
+};
+
+Particle.prototype.applyForce = function( force ) {
+  this.accel += force;
+};
+
+window.Particle = Particle;
+
+})();