From 3731de323d605994c6dcf4b3f139a37a4e473ba0 Mon Sep 17 00:00:00 2001
From: Renat Nasyrov <renat-nasyrov@yandex.ru>
Date: Thu, 9 Apr 2026 19:32:13 +0200
Subject: [PATCH 1/2] Deduplicate direction selection code in Field.js.

---
 jsiso/tile/Field.js | 44 ++++++++++++++------------------------------
 1 file changed, 14 insertions(+), 30 deletions(-)

diff --git a/jsiso/tile/Field.js b/jsiso/tile/Field.js
index 3cac0c2..bc5017f 100644
--- a/jsiso/tile/Field.js
+++ b/jsiso/tile/Field.js
@@ -948,39 +948,23 @@ function(EffectLoader, Emitter, utils) {
           }
         }
         else {
-          if (direction === "up") {
-            drawY += distance * curZoom;
-            // Offset moving for particle effect particles
-            for (particle in particleMapHolder) {
-              for (subPart in particleMapHolder[particle]) {
-                particleMapHolder[particle][subPart].ShiftBy(0, distance * curZoom);
-              }
-            }
-          }
-          else if (direction === "down") {
-            drawY -= distance * curZoom;
-            // Offset moving for particle effect particles
-            for (particle in particleMapHolder) {
-              for (subPart in particleMapHolder[particle]) {
-                particleMapHolder[particle][subPart].ShiftBy(0, -distance * curZoom);
-              }
-            }
-          }
-          else if (direction === "left") {
-            drawX += distance * curZoom;
-            // Offset moving for particle effect particles
-            for (particle in particleMapHolder) {
-              for (subPart in particleMapHolder[particle]) {
-                particleMapHolder[particle][subPart].ShiftBy(distance * curZoom, 0);
-              }
-            }
-          }
-          else if (direction === "right") {
-            drawX -= distance * curZoom;
+          var _delta = {
+            "up":    {"x":  0, "y":  1},
+            "down":  {"x":  0, "y": -1},
+            "left":  {"x":  1, "y":  0},
+            "right": {"x": -1, "y":  0}
+          }[direction];
+          if (_delta) {
+            var _scaled_delta = {
+              "x": delta.x * distance * curZoom,
+              "y": delta.y * distance * curZoom
+            };
+            drawX += _scaled_delta.x;
+            drawY += _scaled_delta.y;
             // Offset moving for particle effect particles
             for (particle in particleMapHolder) {
               for (subPart in particleMapHolder[particle]) {
-                particleMapHolder[particle][subPart].ShiftBy(-distance * curZoom, 0);
+                particleMapHolder[particle][subPart].ShiftBy(_scaled_delta.x, _scaled_delta.y);
               }
             }
           }

From a933d4fae87139fd6049a8dbb1e8a8fb8319ca17 Mon Sep 17 00:00:00 2001
From: Renat Nasyrov <renat-nasyrov@yandex.ru>
Date: Thu, 9 Apr 2026 20:02:51 +0200
Subject: [PATCH 2/2] Deduplicate direction selection code in Field.js.

---
 jsiso/tile/Field.js | 62 ++++++++++++++++++++-------------------------
 1 file changed, 28 insertions(+), 34 deletions(-)

diff --git a/jsiso/tile/Field.js b/jsiso/tile/Field.js
index bc5017f..b006d05 100644
--- a/jsiso/tile/Field.js
+++ b/jsiso/tile/Field.js
@@ -929,45 +929,39 @@ function(EffectLoader, Emitter, utils) {
         var particle, subPart;
 
         distance = distance || tileHeight;
-        if (isometric) {
-          if (direction === "up") {
-            drawY += distance / 2 * curZoom;
-            drawX += distance * curZoom;
-          }
-          else if (direction === "down") {
-            drawY += distance / 2 * curZoom;
-            drawX -= distance * curZoom;
-          }
-          else if (direction === "left") {
-            drawY -= distance / 2 * curZoom;
-            drawX -= distance * curZoom;
-          }
-          else if (direction === "right") {
-            drawY -= distance / 2 * curZoom;
-            drawX += distance * curZoom;
-          }
-        }
-        else {
-          var _delta = {
+        var scaled_step = distance * curZoom;
+        
+        var _delta = {
+          false: {
             "up":    {"x":  0, "y":  1},
             "down":  {"x":  0, "y": -1},
             "left":  {"x":  1, "y":  0},
             "right": {"x": -1, "y":  0}
-          }[direction];
-          if (_delta) {
-            var _scaled_delta = {
-              "x": delta.x * distance * curZoom,
-              "y": delta.y * distance * curZoom
-            };
-            drawX += _scaled_delta.x;
-            drawY += _scaled_delta.y;
-            // Offset moving for particle effect particles
-            for (particle in particleMapHolder) {
-              for (subPart in particleMapHolder[particle]) {
-                particleMapHolder[particle][subPart].ShiftBy(_scaled_delta.x, _scaled_delta.y);
-              }
-            }
+          },
+          true: {
+            "up":    {"x":  1, "y":  0.5},
+            "down":  {"x": -1, "y":  0.5},
+            "left":  {"x": -1, "y": -0.5},
+            "right": {"x":  1, "y": -0.5}
           }
+        }[!!isometric][direction];  
+
+        if !(_delta) return;
+    
+        var _scaled_delta = {
+          "x": _delta.x * scaled_step,
+          "y": _delta.y * scaled_step
+        };
+        drawX += _scaled_delta.x;
+        drawY += _scaled_delta.y;
+        
+        if (!isometric) {
+          // Offset moving for particle effect particles
+          for (particle in particleMapHolder) {
+            for (subPart in particleMapHolder[particle]) {
+              particleMapHolder[particle][subPart].ShiftBy(_scaled_delta.x, _scaled_delta.y);
+            }
+          }          
         }
       }
     };