From 448e55b683d9eeda3fd0f6c96287a4f3b70bc9a1 Mon Sep 17 00:00:00 2001
From: Jules Laplace <jules@okfoc.us>
Date: Fri, 3 Jun 2016 20:30:16 -0400
Subject: phat brushes

---
 js/ui/nopaint.js | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 js/util.js       |  4 ++--
 2 files changed, 54 insertions(+), 2 deletions(-)

diff --git a/js/ui/nopaint.js b/js/ui/nopaint.js
index da30e37..c76d269 100644
--- a/js/ui/nopaint.js
+++ b/js/ui/nopaint.js
@@ -452,6 +452,57 @@ var nopaint = (function(){
       this.resize(3,2)
     },
   })
+
+  var ShadowBrush = NopaintBrush.extend({
+    type: "shadow",
+    pairs: [
+      [ colors.yellow, colors.orange ],
+      [ colors.orange, colors.darkred ],
+      [ colors.red, colors.darkred ],
+      [ colors.lime, colors.green ],
+      [ colors.cyan, colors.teal ],
+      [ colors.cyan, colors.blue ],
+      [ colors.blue, colors.darkblue ],
+      [ colors.magenta, colors.purple ],
+      [ colors.lightgray, colors.darkgray ],
+      [ colors.darkgray, colors.black ],
+      [ colors.white, colors.lightgray ],
+      [ colors.white, colors.black ],
+    ],
+    shapes: [
+      [[0],[1]],
+      [[0,0],[1,1]],
+      [[1,0,0],[1,1,1]],
+      [[0,0,1],[1,1,1]],
+      [[0,0,0],[1,1,1]],
+      [[0,0,0,0],[1,1,1,1]],
+      [[1,0,0,0],[null,1,1,1]],
+      [[0,0,0,1],[1,1,1,null]],
+      [[0,0],[1,0],[1,1]],
+      [[0,0],[0,1],[1,1]],
+    ],
+    reset: function( last_brush ){
+      var pair = choice(this.pairs)
+      var shape = choice(this.shapes)
+      this.reorient( last_brush )
+      brush.char = " "
+      console.log(shape[0].length, shape.length)
+      brush.resize(shape[0].length, shape.length)
+      brush.generate()
+      brush.rebuild()
+      brush.forEach(function(lex,x,y){
+        if (shape[y][x] == null) {
+          lex.opacity = 0
+        }
+        else {
+          lex.fg = lex.bg = pair[ shape[y][x] ]
+          lex.opacity = 1
+        }
+        lex.build()
+      })
+    },
+    regenerate: function(){},
+  })
   
   var RandomBrush = SolidBrush.extend({
     type: "random",
@@ -766,6 +817,7 @@ var nopaint = (function(){
   })
   
   nopaint.add_tool( new SolidBrush({ weight: 5 }) )
+  nopaint.add_tool( new ShadowBrush({ weight: 10 }) )
   nopaint.add_tool( new EraseBrush({ weight: 5 }) )
   nopaint.add_tool( new RandomBrush({ weight: 4 }) )
   nopaint.add_tool( new HueBrush({ weight: 5 }) )
diff --git a/js/util.js b/js/util.js
index cdabbe1..f2fd129 100644
--- a/js/util.js
+++ b/js/util.js
@@ -58,8 +58,8 @@ function choice(a){ return a[randint(a.length)] }
 function deg(n){ return n*180/PI }
 function rad(n){ return n*PI/180 }
 function xor(a,b){ a=!!a; b=!!b; return (a||b) && !(a&&b) }
-function mod(n,m){ return n-(m * floor(n/m)) }
-function modi(n,m){ return floor(n-(m * floor(n/m))) }
+function mod(n,m){ n = n % m; return n < 0 ? (m + n) : n }
+function modi(n,m){ return floor(mod(n,m)) }
 function dist(x0,y0,x1,y1){ return sqrt(pow(x1-x0,2)+pow(y1-y0,2)) }
 function angle(x0,y0,x1,y1){ return atan2(y1-y0,x1-x0) }
 function avg(m,n,a){ return (m*(a-1)+n)/a }
-- 
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