Improve belt direction lock

src/js/core/utils.js

@@ -978,17 +978,3 @@ export function formatItemsPerSecond(speed, double = false) {
         : T.ingame.buildingPlacement.infoTexts.itemsPerSecond.replace("<x>", "" + round2Digits(speed)) +
               (double ? "  " + T.ingame.buildingPlacement.infoTexts.itemsPerSecondDouble : "");
 }
-
-/**
- * Finds the corner point between two vectors
- * @param {Vector} a
- * @param {Vector} b
- */
-export function findCornerBetweenPoints(a, b) {
-    const delta = b.sub(a);
-    if (Math_abs(delta.x) > Math_abs(delta.y)) {
-        return new Vector(a.x, b.y);
-    } else {
-        return new Vector(b.x, a.y);
-    }
-}

src/js/game/hud/parts/building_placer.js

@@ -3,8 +3,13 @@ import { globalConfig } from "../../../core/config";
 import { DrawParameters } from "../../../core/draw_parameters";
 import { drawRotatedSprite } from "../../../core/draw_utils";
 import { Loader } from "../../../core/loader";
-import { findCornerBetweenPoints, makeDiv, removeAllChildren } from "../../../core/utils";
-import { enumDirectionToAngle, enumDirectionToVector, enumInvertedDirections } from "../../../core/vector";
+import { makeDiv, removeAllChildren } from "../../../core/utils";
+import {
+    enumDirectionToAngle,
+    enumDirectionToVector,
+    enumInvertedDirections,
+    Vector,
+} from "../../../core/vector";
 import { T } from "../../../translations";
 import { KEYMAPPINGS } from "../../key_action_mapper";
 import { defaultBuildingVariant } from "../../meta_building";
@@ -42,8 +47,9 @@ export class HUDBuildingPlacer extends HUDBuildingPlacerLogic {
         this.signals.variantChanged.add(this.rerenderVariants, this);
 
         this.domAttach = new DynamicDomAttach(this.root, this.element, {});
-
         this.variantsAttach = new DynamicDomAttach(this.root, this.variantsElement, {});
+
+        this.currentInterpolatedCornerTile = new Vector();
     }
 
     /**

src/js/game/hud/parts/building_placer_logic.js

@@ -2,7 +2,6 @@ import { Math_abs, Math_degrees, Math_round } from "../../../core/builtins";
 import { globalConfig } from "../../../core/config";
 import { Signal, STOP_PROPAGATION } from "../../../core/signal";
 import { TrackedState } from "../../../core/tracked_state";
-import { findCornerBetweenPoints } from "../../../core/utils";
 import { Vector } from "../../../core/vector";
 import { enumMouseButton } from "../../camera";
 import { StaticMapEntityComponent } from "../../components/static_map_entity";
@@ -31,6 +30,7 @@ export class HUDBuildingPlacerLogic extends BaseHUDPart {
         // Signals
         this.signals = {
             variantChanged: new Signal(),
+            draggingStarted: new Signal(),
         };
 
         /**
@@ -137,8 +137,14 @@ export class HUDBuildingPlacerLogic extends BaseHUDPart {
         // Figure which points the line visits
         const worldPos = this.root.camera.screenToWorld(mousePosition);
         const mouseTile = worldPos.toTileSpace();
-        const cornerTile = findCornerBetweenPoints(this.lastDragTile, mouseTile);
-        return cornerTile;
+
+        const fractional = worldPos.sub(mouseTile.toWorldSpaceCenterOfTile());
+
+        if (fractional.x + fractional.y < 0) {
+            return new Vector(this.lastDragTile.x, mouseTile.y);
+        } else {
+            return new Vector(mouseTile.x, this.lastDragTile.y);
+        }
     }
 
     /**