hacking on a pulsar thingy....

index.html

@@ -30,7 +30,7 @@
       //
 
     //$GLOBALS
-    var $canvas = null, $2d = null;
+    var $canvas = null, $2d = null, $num_pendulums = 15;
 
     //lists
     var $objects = [], $pendulums = [], $algorithms = [];
@@ -49,7 +49,7 @@
 
       // build out some pendulums
       var j;
-      for (i = 0; i < 15; i ++) {
+      for (i = 0; i < $num_pendulums; i ++) {
         j = new pendulum( 650, 100, i, 160, 51 - i )
         $pendulums.push( j );
       }
@@ -88,6 +88,9 @@
         //dirty, dirty, dirty hack...
         gradienter.checked = true;
         gradienter.onclick({target: gradienter});
+      } else {
+        $movement = false;
+        sort();
       }
 
 

pulsar.js

@@ -1,19 +1,90 @@
 function pulsar_callback(ball, position, tick){
-  if (window.$puslar == null)
+  if (window.$pulsar == null) {
     window.$pulsar = new pulsar();
+  }
 
-  window.$pulsar.tick(ball, position, tick);
+  $pulsar.tick(ball, position, tick);
 }
 
 function pulsar(){
-  // delay between pulses
-  this.pulse_delay = 400;
+  // config variables
+  this.pulse_delay = 40;
+  this.pulse_step = 10;
+  this.pulse_trail = false; //TODO
+
+  // state variables
+  this.pulsing = false;
+  this.pulse_position = 0;
+  this.last_pulse_started = 0;
+
+  this.pulses = [];
+  for (i = 0; i < $num_pendulums; i++)
+    this.pulses[i] = {on: false, fixed: false, decay: 10}
+
 
   this.tick = pulsar_tick;
+  this.new_pulse = pulsar_new_pulse;
+  this.increment_pulses = pulsar_increment_pulses;
 }
 
 function pulsar_tick(ball, position, tick){
-  ball.color.hsl(1,1,1);
+
+  if (position == 0){
+    //fire a pulse
+    if (!this.pulsing && tick - this.last_pulse_started >= this.pulse_delay) {
+      this.pulsing = true;
+      this.last_pulse_started = tick;
+    }
+
+    if (tick % this.pulse_delay == 0)
+      this.new_pulse();
+
+    this.increment_pulses(ball, position, tick);
+  }
+
+  ball.color.rgb(45,45,45);
+
+  if (this.pulses[position].on){
+    ball.color.rgb(155,155,155);
+  }
+
+}
+
+function pulsar_new_pulse(){
+  this.pulses[this.pulses.length - 1] = {on: true, fixed: false, decay: 10}
+}
+
+function pulsar_increment_pulses(ball, position, tick){
+  if (tick % this.pulse_step == 0){
+    //if the next one in the series isn't on, move this one there
+    for (i = 0; i < this.pulses.length; i ++){
+      if (i == 0){
+        if (this.pulses[i].on)
+          this.pulses[i].fixed = true;
+      }
+
+      if (this.pulses[i].fixed) {
+        this.pulses[i].decay --;
+
+        if (this.pulses[i].decay < 0)
+          this.pulses[i] = {on: false, fixed: false, decay: 10}
+
+        continue;
+      }
+
+
+      if (this.pulses[i].on){
+        if (!this.pulses[i - 1].on) {
+          this.pulses[i - 1].on = true;
+          this.pulses[i].on = false;
+        }
+
+        if (this.pulses[i - 1].fixed){
+          this.pulses[i].fixed = true;
+        }
+      }
+    }
+  }
 }
 
 if (window.$algorithms)