2 files changed, 40 insertions, 2 deletions
diff --git a/js/ui/evolver.js b/js/ui/evolver.js
index a7d423b..6a85c7d 100644
--- a/js/ui/evolver.js
+++ b/js/ui/evolver.js
@@ -40,8 +40,9 @@ var evolver = (function(){
   modes.gray = 'gray'
   modes.color = 'solid hue erase random'
   modes.letter = 'letter random-letter'
-  modes.brush = [modes.gray, modes.color, 'smear clone'].join(" ")
-  modes.magic = 'letter random-letter fill-letter translate scale rotate cycle smear clone'
+  modes.shadow = 'shadow'
+  modes.brush = [modes.gray, modes.color, modes.shadow, 'smear clone'].join(" ")
+  modes.magic = 'letter random-letter fill-letter translate slice scale rotate cycle smear clone'
 
   if (opt.mode && opt.mode in modes){
     nopaint.disable_all_tools()
diff --git a/js/ui/nopaint.js b/js/ui/nopaint.js
index 74ddadf..9011953 100644
--- a/js/ui/nopaint.js
+++ b/js/ui/nopaint.js
@@ -747,6 +747,42 @@ var nopaint = (function(){
     },
   })
 
+  var SliceTool = ShaderTool.extend({
+    type: "slice",
+    dx: 0,
+    dy: 0,
+    speed: 1,
+    is_recursive: true,
+    start: function(){
+      this.__start()
+      this.is_y = Math.random() > 0.3
+      this.limit = this.is_y ? canvas.h : canvas.w
+      this.position = randint(this.limit)
+      this.direction = 1
+    },
+    before_shade: function(){
+      if (Math.random() < 0.6) {
+        this.position = mod(this.position + 1, this.limit)
+      }
+      if (Math.random() > 0.8) {
+        this.direction = randsign()
+      }
+    },
+    shade: function(src, dest, lex, x, y, w, h){
+      if (this.is_y) {
+        if (y >= this.position) {
+          var copy = src.get(x + this.direction, y)
+          lex.assign(copy)
+        }
+      }
+      else if (x >= this.position) {
+        var copy = src.get(x, y + this.direction)
+        lex.assign(copy)
+      }
+      return true
+    },
+  })
+
   var ScaleTool = ShaderTool.extend({
     type: "scale",
     scale: 1,
@@ -848,6 +884,7 @@ var nopaint = (function(){
   nopaint.add_tool( new CycleTool({ weight: 1 }) )
   nopaint.add_tool( new ScaleTool({ weight: 3 }) )
   nopaint.add_tool( new RotateTool({ weight: 3 }) )
+  nopaint.add_tool( new SliceTool({ weight: 4 }) )
   nopaint.add_tool( new ColorizeTool({ weight: 1 }) )
   nopaint.regenerate_weights()