mirror x/y

1 files changed, 40 insertions, 4 deletions

diff --git a/js/draw.js b/js/draw.js
index eb58a27..407e1c8 100644
--- a/js/draw.js
+++ b/js/draw.js
@@ -4,13 +4,32 @@ var draw = (function(){
   var last_point = [0,0]
   
   function down (e, lex, point) {
+    var w = canvas.w, h = canvas.h
     erasing = (e.which == "3" || e.ctrlKey)
     changed = true
     if (e.shiftKey) {
       line (lex, last_point, point, erasing)
+      if (mirror_x) {
+        line(lex, [w-last_point[0], last_point[1]], [w-point[0], point[1]], erasing)
+      }
+      if (mirror_y) {
+        line(lex, [last_point[0], h-last_point[1]], [point[0], h-point[1]], erasing)
+      }
+      if (mirror_x && mirror_y) {
+        line(lex, [w-last_point[0], h-last_point[1]], [w-point[0], h-point[1]], erasing)
+      }
     }
     else {
       stamp (canvas, brush, point[0], point[1], erasing)
+      if (mirror_x) {
+        stamp (canvas, brush, w-point[0], point[1], erasing)
+      }
+      if (mirror_y) {
+        stamp (canvas, brush, point[0], h-point[1], erasing)
+      }
+      if (mirror_x && mirror_y) {
+        stamp (canvas, brush, w-point[0], h-point[1], erasing)
+      }
     }
     last_point[0] = point[0]
     last_point[1] = point[1]
@@ -22,7 +41,18 @@ var draw = (function(){
   }
   
   function move (e, lex, point) {
+    var w = canvas.w, h = canvas.h
     line(lex, last_point, point, erasing)
+    if (mirror_x) {
+      line(lex, [w-last_point[0], last_point[1]], [w-point[0], point[1]], erasing)
+    }
+    if (mirror_y) {
+      line(lex, [last_point[0], h-last_point[1]], [point[0], h-point[1]], erasing)
+    }
+    if (mirror_x && mirror_y) {
+      line(lex, [w-last_point[0], h-last_point[1]], [w-point[0], h-point[1]], erasing)
+    }
+
     last_point[0] = point[0]
     last_point[1] = point[1]
   }
@@ -82,11 +112,17 @@ var draw = (function(){
     }
     else {
       var last_point_mod = [], point_mod = []
-      last_point_mod[0] = mod( last_point[0], w )
-      last_point_mod[1] = mod( last_point[1], h )
-      point_mod[0] = mod( point[0], w )
-      point_mod[1] = mod( point[1], h )
+      var x_a = mod( last_point[0], w )
+      var y_a = mod( last_point[1], h )
+      var x_b = mod( point[0], w )
+      var y_b = mod( point[1], h )
       line(lex, last_point_mod, point_mod, erasing)
+      if (mirror_x) {
+        line(lex, [w-last_point_mod[0], last_point_mod[1]], [w-point_mod[0], point_mod[1]], erasing)
+      }
+      if (mirror_y) {
+        line(lex, [last_point_mod[0], h-last_point_mod[1]], [point_mod[0], h-point_mod[1]], erasing)
+      }
     }
     last_point[0] = point[0]
     last_point[1] = point[1]