WIP: firing arcs algo

public/map.css

@@ -329,3 +329,13 @@ g[data-y="50"] { --i: 50; }
 .buildings {
   display: none;
 }
+
+#test-arcs line, #test-arcs polyline {
+  stroke: black;
+  fill: none;
+}
+
+#test-arcs rect, #test-arcs polygon {
+  fill: black;
+  fill-opacity: 0.2;
+}

public/map.svg

@@ -51,6 +51,8 @@
   </g>
 
   <g class="board">
+    <g id="test-arcs">
+    </g>
     <g class="grid">
       <g class="start-locations">
         <g>