4 files changed, 29 insertions, 6 deletions

@@ -35,9 +35,12 @@ window.Puzzle = class {
 
       // If true, custom mechanics are displayed (and validated) in this puzzle.
       CUSTOM_MECHANICS: false,
-      
+
       // If true, polyominos may be placed partially off of the grid as an intermediate solution step.
       // OUT_OF_BOUNDS_POLY: false,
+
+      // If true, the symmetry line will be invisible.
+      INVISIBLE_SYMMETRY: false,
     }
   }
 
@@ -43,6 +43,7 @@ window.serializePuzzle = function(puzzle) {
   if (puzzle.settings.FLASH_FOR_ERRORS)           settingsFlags |= SETTINGS_FLAG_FFE
   if (puzzle.settings.FAT_STARTPOINTS)            settingsFlags |= SETTINGS_FLAG_FS
   if (puzzle.settings.CUSTOM_MECHANICS)           settingsFlags |= SETTINGS_FLAG_CM
+  if (puzzle.settings.INVISIBLE_SYMMETRY)         settingsFlags |= SETTINGS_FLAG_IS
   s.writeByte(settingsFlags)
 
   return s.str()
@@ -93,6 +94,7 @@ window.deserializePuzzle = function(data) {
     FLASH_FOR_ERRORS:           (settingsFlags & SETTINGS_FLAG_FFE) != 0,
     FAT_STARTPOINTS:            (settingsFlags & SETTINGS_FLAG_FS) != 0,
     CUSTOM_MECHANICS:           (settingsFlags & SETTINGS_FLAG_CM) != 0,
+    INVISIBLE_SYMMETRY:         (settingsFlags & SETTINGS_FLAG_IS) != 0,
   }
 
   s.destroy()
@@ -342,5 +344,6 @@ var SETTINGS_FLAG_PP          = 4
 var SETTINGS_FLAG_FFE         = 8
 var SETTINGS_FLAG_FS          = 16
 var SETTINGS_FLAG_CM          = 32
+var SETTINGS_FLAG_IS          = 64
 
 })
@@ -138,10 +138,18 @@ class PathSegment {
       data.svg.insertBefore(this.symCirc, data.cursor)
       data.svg.insertBefore(this.symPoly2, data.cursor)
       data.svg.insertBefore(this.symPillarCirc, data.cursor)
-      this.symPoly1.setAttribute('class', 'line-3 ' + data.svg.id)
-      this.symCirc.setAttribute('class', 'line-3 ' + data.svg.id)
-      this.symPoly2.setAttribute('class', 'line-3 ' + data.svg.id)
-      this.symPillarCirc.setAttribute('class', 'line-3 ' + data.svg.id)
+
+      if (data.puzzle.settings.INVISIBLE_SYMMETRY) {
+        this.symPoly1.setAttribute('class', 'line-4 ' + data.svg.id)
+        this.symCirc.setAttribute('class', 'line-4 ' + data.svg.id)
+        this.symPoly2.setAttribute('class', 'line-4 ' + data.svg.id)
+        this.symPillarCirc.setAttribute('class', 'line-4 ' + data.svg.id)
+      } else {
+        this.symPoly1.setAttribute('class', 'line-3 ' + data.svg.id)
+        this.symCirc.setAttribute('class', 'line-3 ' + data.svg.id)
+        this.symPoly2.setAttribute('class', 'line-3 ' + data.svg.id)
+        this.symPillarCirc.setAttribute('class', 'line-3 ' + data.svg.id)
+      }
 
       this.symCirc.setAttribute('cx', data.symbbox.middle.x)
       this.symCirc.setAttribute('cy', data.symbbox.middle.y)
@@ -345,6 +353,7 @@ function clearGrid(svg, puzzle) {
   window.deleteElementsByClassName(svg, 'line-1')
   window.deleteElementsByClassName(svg, 'line-2')
   window.deleteElementsByClassName(svg, 'line-3')
+  window.deleteElementsByClassName(svg, 'line-4')
   puzzle.clearLines()
 }
 
@@ -506,7 +515,11 @@ window.onTraceStart = function(puzzle, pos, svg, start, symStart=null) {
 
     data.symcursor = createElement('circle')
     svg.insertBefore(data.symcursor, data.cursor)
-    data.symcursor.setAttribute('class', 'line-3 ' + data.svg.id)
+    if (data.puzzle.settings.INVISIBLE_SYMMETRY) {
+      data.symcursor.setAttribute('class', 'line-4 ' + data.svg.id)
+    } else {
+      data.symcursor.setAttribute('class', 'line-3 ' + data.svg.id)
+    }
     data.symcursor.setAttribute('cx', symStart.getAttribute('cx'))
     data.symcursor.setAttribute('cy', symStart.getAttribute('cy'))
     data.symcursor.setAttribute('r', 12)
@@ -153,6 +153,10 @@ l('.line-3 {')
 l('  fill: ' + window.LINE_SECONDARY + ';')
 l('  pointer-events: none;')
 l('}')
+l('.line-4 {')
+l('  display: none;')
+l('  pointer-events: none;')
+l('}')
 l('@keyframes line-success {to {fill: ' + window.LINE_SUCCESS + ';}}')
 l('@keyframes line-fail {to {fill: ' + window.LINE_FAIL + ';}}')
 l('@keyframes error {to {fill: red;}}')