stroking brush

1 files changed, 13 insertions, 2 deletions

diff --git a/js/draw.js b/js/draw.js
index c72ca08..173a84e 100644
--- a/js/draw.js
+++ b/js/draw.js
@@ -4,11 +4,22 @@ function draw (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 stamp (canvas, brush, x, y, erasing) {
 	hh = brush.w/2|0
 	brush.forEach(function(lex, s, t){
-		s += x-hh
-		t += y-hh
+		s = round( s + x-hh )
+		t = round( t + y-hh )
 		if (s >= 0 && s < canvas.w && t >= 0 && t < canvas.h) {
 		  if (erasing) {
         canvas.aa[t][s].erase(lex)