modify ClickPoints.getClickPos function to detect click for square/pixel, not for triangle. (Checking if mouse is between two click points instead of if mouse is around one click point.)

temp-squares/fcore/app-update.sml

@@ -170,6 +170,17 @@ struct
         CollisionTree.toTriangles (windowWidth, windowHeight, squares, maxSide)
       val drawMsg = DRAW_SQUARES_AND_DOTS {squares = squares, dots = dotVec}
     in
-      (model, drawMsg)
+      (model, [drawMsg])
     end
+
+  fun mouseLeftClick model =
+    case ClickPoints.getClickPositionFromMouse model of
+      SOME (hIdx, vIdx) => addCoordinates (model, hIdx, vIdx)
+    | NONE => (model, [])
+
+  fun enterOrSpaceCoordinates model =
+    let val {arrowX, arrowY, ...} = model
+    in addCoordinates (model, arrowX, arrowY)
+    end
+
 end

temp-squares/fcore/click-points.sml

@@ -10,25 +10,22 @@ struct
         (Real32.fromInt idx * increment) + start)
     end
 
-  (*
-   * Range to detect from clickable position. 
-   * For example, if we have a clickable position at (x, y) = (500, 500),
-   * with a range of 15, we can detect clicks targeting this position 
-   * from top left at (485, 485) to bottom right at (515, 515).
-   * *)
-  val range = 15.0
-
   fun getClickPos (clickPoints, mousePos, idx) =
-    if idx = Vector.length clickPoints then
+    let
+      val nextIdx = idx + 1
+    in
+      if nextIdx >= Vector.length clickPoints then
         NONE
       else
         let
           val curPos = Vector.sub (clickPoints, idx)
+          val nextPos = Vector.sub (clickPoints, nextIdx)
         in
-        if mousePos < curPos - range orelse mousePos > curPos + range then
+          if mousePos >= curPos andalso mousePos <= nextPos then
-          getClickPos (clickPoints, mousePos, idx + 1)
-        else
             SOME idx
+          else
+            getClickPos (clickPoints, mousePos, idx + 1)
+        end
     end
 
   fun getClickPositionFromMouse (app: AppType.app_type) =