Reset to random tile

index.html

@@ -48,6 +48,7 @@
 				  <button class="w3-button">System</button>
 				  <div class="w3-dropdown-content w3-bar-block w3-card-4">
 				    <button id="reset-to-seed-button" class="w3-bar-item w3-button">Reset To Seed</button>
+                                    <button id="reset-to-random-button" class="w3-bar-item w3-button">Reset To One Random Tile</button>
 				  </div>
 				</div>
 				<div class="w3-dropdown-hover">

src/simulator.mjs

@@ -35,7 +35,7 @@ export class Simulator {
 		this.saveSVGConfirmButton = document.getElementById('save-svg-confirm-button');
 
 		this.resetToSeedButton = document.getElementById('reset-to-seed-button');
-
+                this.resetToRandomButton = document.getElementById('reset-to-random-button');
 		this.infoBar = document.getElementById('sim-info');
 
 		this.stepForwardButton.addEventListener('click', (e) => { this.stepForward(); });
@@ -51,6 +51,10 @@ export class Simulator {
 		this.zoomOutButton.addEventListener('click', (e) => { this.zoomOut(); });
 
 	        this.resetToSeedButton.addEventListener('click', (e) => { this.reset(true) });
+                this.resetToRandomButton.addEventListener('click', (e) => {
+                    this.reset(false);
+                    this.addRandomAtOrigin();
+                });
 
 		this.simulationModeConfirmButton.addEventListener('click', (e) => { this.simulationModeOption(); });
 		this.saveSVGConfirmButton.addEventListener('click', (e) => { this.initiateSvgSnapshot(); });
@@ -134,6 +138,13 @@ export class Simulator {
 		this.renderUpdate = true;
 	}
 
+    addRandomAtOrigin() {
+        let ttypes = this.tileset.tileTypes;
+        let tile = ttypes[Math.floor(Math.random()*ttypes.length)];
+        let origin = new Vector2D(0, 0);
+        this.addTile(tile, origin);
+    }
+
 	refreshTiles() {
 		this.tileWorker.postMessage({ msg: 'tileset', types: this.tileset.getTileTypes(), glues: this.tileset.getGlues(), blockers_v2: this.tileset.tileGlueBlockers});
 		for (const type of this.tileset.getTileTypes())