1 files changed, 59 insertions, 28 deletions
diff --git a/js/draw.js b/js/draw.js
index 09e660b..d6b5d73 100644
--- a/js/draw.js
+++ b/js/draw.js
@@ -1,32 +1,63 @@
 
+var draw = (function(){
 
-function draw (lex, x, y, erasing) {
-	stamp (canvas, brush, x, y, erasing)
-}
+  var last_point = [0,0]
+  
+  function down (e, lex, point) {
+    erasing = (e.which == "3" || e.ctrlKey)
+    if (e.shiftKey) {
+      line (lex, last_point, point, erasing)
+    }
+    else {
+      stamp (canvas, brush, point[0], point[1], erasing)
+    }
+    last_point[0] = point[0]
+    last_point[1] = point[1]
+  }
+  
+  function move (e, lex, point) {
+    line(lex, last_point, point, erasing)
+    last_point[0] = point[0]
+    last_point[1] = point[1]
+  }
+  
+  function point (lex, x, y, erasing) {
+    stamp (canvas, brush, x, y, erasing)
+  }
 
-function line (lex, a, b, erasing) {
-	var len = dist(a[0], a[1], b[0], b[1])
-	var bw = 1
-	var x, y, i;
-	for (var i = 0; i < len; i += bw) {
-		x = lerp(i / len, a[0], b[0])
-		y = lerp(i / len, a[1], b[1])
-		stamp (canvas, brush, x, y, erasing)
-	}
-}
+  function line (lex, a, b, erasing) {
+    var len = dist(a[0], a[1], b[0], b[1])
+    var bw = 1
+    var x, y, i;
+    for (var i = 0; i < len; i += bw) {
+      x = lerp(i / len, a[0], b[0])
+      y = lerp(i / len, a[1], b[1])
+      stamp (canvas, brush, x, y, erasing)
+    }
+  }
 
-function stamp (canvas, brush, x, y, erasing) {
-	hh = brush.w/2|0
-	brush.forEach(function(lex, s, t){
-		s = round( s + x-hh )
-		t = round( t + y-hh )
-		if (lex.opacity > 0 && s >= 0 && s < canvas.w && t >= 0 && t < canvas.h) {
-		  if (erasing) {
-        canvas.aa[t][s].erase(lex)
-		  }
-		  else {
-        canvas.aa[t][s].clone(lex)
-		  }
-		}
-	})
-}
+  function stamp (canvas, brush, x, y, erasing) {
+    hh = brush.w/2|0
+    brush.forEach(function(lex, s, t){
+      s = round( s + x-hh )
+      t = round( t + y-hh )
+      if (lex.opacity > 0 && s >= 0 && s < canvas.w && t >= 0 && t < canvas.h) {
+        if (erasing) {
+          canvas.aa[t][s].erase(lex)
+        }
+        else {
+          canvas.aa[t][s].clone(lex)
+        }
+      }
+    })
+  }
+
+  var draw = {}
+  draw.down = down
+  draw.move = move
+  draw.stamp = stamp
+  draw.line = line
+  draw.point = point
+  return draw
+
+})()