Implement saving and restoring belt paths

src/js/game/components/belt.js

@@ -1,12 +1,9 @@
-import { Component } from "../component";
+import { Math_cos, Math_PI, Math_sin } from "../../core/builtins";
+import { enumDirection, Vector } from "../../core/vector";
 import { types } from "../../savegame/serialization";
-import { gItemRegistry } from "../../core/global_registries";
-import { BaseItem } from "../base_item";
-import { Vector, enumDirection } from "../../core/vector";
-import { Math_PI, Math_sin, Math_cos } from "../../core/builtins";
-import { globalConfig } from "../../core/config";
-import { Entity } from "../entity";
 import { BeltPath } from "../belt_path";
+import { Component } from "../component";
+import { Entity } from "../entity";
 
 export const curvedBeltLength = /* Math_PI / 4 */ 0.78;
 
@@ -19,7 +16,6 @@ export class BeltComponent extends Component {
         // The followUpCache field is not serialized.
         return {
             direction: types.string,
-            sortedItems: types.array(types.pair(types.float, types.obj(gItemRegistry))),
         };
     }
 
@@ -37,9 +33,6 @@ export class BeltComponent extends Component {
 
         this.direction = direction;
 
-        /** @type {Array<[number, BaseItem]>} */
-        this.sortedItems = [];
-
         /** @type {Entity} */
         this.followUpCache = null;
 
@@ -85,46 +78,4 @@ export class BeltComponent extends Component {
                 return new Vector(0, 0);
         }
     }
-
-    /**
-     *  Returns if the belt can currently accept an item from the given direction
-     */
-    canAcceptItem() {
-        const firstItem = this.sortedItems[0];
-        if (!firstItem) {
-            return true;
-        }
-
-        return firstItem[0] > globalConfig.itemSpacingOnBelts;
-    }
-
-    /**
-     * Pushes a new item to the belt
-     * @param {BaseItem} item
-     */
-    takeItem(item, leftoverProgress = 0.0) {
-        if (G_IS_DEV) {
-            assert(
-                this.sortedItems.length === 0 ||
-                    leftoverProgress <= this.sortedItems[0][0] - globalConfig.itemSpacingOnBelts + 0.001,
-                "Invalid leftover: " +
-                    leftoverProgress +
-                    " items are " +
-                    this.sortedItems.map(item => item[0])
-            );
-            assert(leftoverProgress < 1.0, "Invalid leftover: " + leftoverProgress);
-        }
-        this.sortedItems.unshift([leftoverProgress, item]);
-    }
-
-    /**
-     * Returns how much space there is to the first item
-     */
-    getDistanceToFirstItemCenter() {
-        const firstItem = this.sortedItems[0];
-        if (!firstItem) {
-            return 1;
-        }
-        return firstItem[0];
-    }
 }