fiiiiix scaling

2 files changed, 33 insertions, 13 deletions

diff --git a/env.js b/env.js
index 0382770..a0dd02a 100644
--- a/env.js
+++ b/env.js
@@ -137,10 +137,29 @@ var environment = (function(){
     use_scale = $("#use_scale").get(0).checked
   }
   environment.set_intervals = function(){
-    scale = $("#intervals").val().split(" ").map(parseInterval).filter(function(v){
+    root = parseFloat( $("#root").val() )
+    var intervals = $("#intervals").val().split(/\s/).map(function(v){
+      if (v.indexOf("/") !== -1) return parseInterval(v) // intervals
+      if (v.indexOf("f") !== -1) return parseFloat(v)    // pure frequencies
+      return parseFloat(v)
+    }).filter(function(v){
       return !! v
-    }).map(function(v){
-      return v * root
+    })
+    if (! intervals.length) return
+    var last_interval = intervals[ intervals.length-1 ]
+    if (last_interval > 20) {
+      interval = last_interval / intervals[0]
+    }
+    else { 
+      interval = intervals.pop()
+    }
+    scale = intervals.map(function(v){
+      if (v < 20) {
+        return v * root
+      }
+      else {
+        return v
+      }
     })
   }
   environment.check_drawing = function(){
@@ -264,7 +283,7 @@ var environment = (function(){
     var ratio, n
     tet = parseFloat( $("#tet").val() )
     root = parseFloat( $("#root").val() )
-    interval = parseInterval( $("#interval").val() )
+    interval = intervals[ intervals.length - 1 ]
     ratio = Math.pow( interval, 1/tet )
     n = root
     scale = [n]
@@ -300,12 +319,15 @@ var environment = (function(){
     return scale_f
   }
   environment.quantize_index = function(index){
-    return mod(index, scale.length-1)|0
+    return mod(index-1, scale.length)|0
   }
   environment.index_to_frequency = function(index){
-    var f = scale[ mod(index, scale.length-1)|0 ]
-    var pow = Math.floor(norm(index, 0, scale.length-1)) - 2
-    f *= Math.pow(interval, pow)
+    var f = scale[ mod(index, scale.length)|0 ]
+//     if (f < 20) {
+      var pow = Math.floor(norm(index-1, 0, scale.length)) - 2
+      f *= Math.pow(interval, pow)
+//     }
+    // console.log(index, f, pow)
     // console.log(index, scale.length, pow, f)
     return f
   }
@@ -442,7 +464,8 @@ var environment = (function(){
   }
   Wire.prototype.updateColor = function(should_set){
     var index = this.index()
-    var color = Snap.hsl(mod(index / tet * 240 + 180, 360), 100, 50)
+    // console.log(index, scale.length, index / scale.length)
+    var color = Snap.hsl(mod(index / scale.length * 240 + 180, 360), 100, 50)
     if (should_set) {
       this.path.attr({
         stroke: color,
@@ -523,7 +546,6 @@ var environment = (function(){
     if (isNaN(num)) return 2
     if (isNaN(den) || den == 0) return num
     if (num == den) return 2
-    if (num < den) return den/num
     return num / den
   }
 
diff --git a/index.html b/index.html
index c35674a..3131393 100644
--- a/index.html
+++ b/index.html
@@ -62,12 +62,10 @@ input[type=text] { width: 30px }
   <input id="tet" type="number" min="2" max="500" step="1" value="12">
   <label for="root">root</label>
   <input id="root" type="number" min="20" max="20000" value="440">
-  <label for="interval">interval</label>
-  <input id="interval" type="text" value="2/1">
   <label for="duration">duration</label>
   <input id="duration" type="number" min="0" max="5000" step="50" value="1250">
   <label for="intervals">intervals</label>
-  <input id="intervals" type="text" value="9/8 5/4 4/3 3/2 5/3 15/8 2/1">
+  <input id="intervals" type="text" value="1/1 9/8 5/4 4/3 3/2 5/3 15/8 2/1">
   <label for="use_scale">use scale</label>
   <input id="use_scale" type="checkbox" checked>
   <div id="mobile_controls">