Check the feasability of OnTAS simulation

src/simulator.mjs

@@ -987,6 +987,23 @@ export class Simulator {
 
 		Logger.log(Logger.INFO, `saved current assembly as SVG file ${fileName}`);
 	}
+
+    currentAssemblyContainsTwoTwoSquare() {
+	let two_by_two_found = false;
+	let atlas = this.tileBlockAtlas;
+	console.log(atlas);
+	for (const tile of atlas.getAllTiles()) {
+	    const x = tile.coords.x;
+	    const y = tile.coords.y;
+	    if (atlas.getTileAtLocation(new Vector2D(x+1, y))&&
+		atlas.getTileAtLocation(new Vector2D(x+1, y+1)) &&
+		atlas.getTileAtLocation(new Vector2D(x, y+1))) {
+		two_by_two_found = true;
+		break;
+	    }
+	}
+	return two_by_two_found;
+    }
 }
 
 // TOUCH EVENTS

src/webtas.mjs

@@ -259,7 +259,13 @@ async function onOnTASSimButton() {
     let blobs = simulator.saveSystem(filename);
 
     let tdpContents, tdsContents;
-    
+
+    let n_tiles = simulator.tileset.tileTypes.length;
+    if (n_tiles > 3000) {
+	alert('The current system has ' + n_tiles + ' tile types.\nBecause of limitations of the web simulator, the OnTAS simulation can only be run on tileset with at most 3000 tile types, sorry.');
+	return;
+    }
+
     if (blobs === null) {
     	alert('No system to convert to the OnTAS. Please open a system before doing that');
     	return;
@@ -267,35 +273,35 @@ async function onOnTASSimButton() {
 	tdpContents = await blobs[0].text();
 	tdsContents = await blobs[1].text();
     }
-    let myWorker = new Worker(new URL("src/ontasWorker.js", window.location.href).href, { type: "module"});
 
-    console.log("let's go");
+    let current_assembly_size = tdpContents.split('\n').length - 2;
+    if (current_assembly_size > 3000) {
+	alert('The current assembly has ' + current_assembly_size + ' tiles.\nBecause of limitations of the web simulator, the OnTAS simulation can only be run on assemblies with at most 3000 tiles, sorry.')
+    }
+
+    if (!simulator.currentAssemblyContainsTwoTwoSquare()) {
+	alert('The current assembly does not contain a 2×2 square, so it cannot be used as the simulated seed in the simulation. Try stepping a few times until it does.\nOnly Theorem 8 (the 5×5 simulation) is implemented, sorry!');
+	return;
+    }
+
+    let myWorker = new Worker(new URL("src/ontasWorker.js", window.location.href).href, { type: "module"});
     
     myWorker.ready = false;
     myWorker.onmessageerror = (event) => {
 	console.log(error)
     };
     myWorker.onerror = (error) => {
-	console.log(error);
 	console.error('Error occurred in worker:', error.message);
     };
     myWorker.onmessage = (event) => {
-	console.log(myWorker.ready)
 	if (myWorker.ready) {
 	    let newTds = new TextDecoder().decode(event.data)
-	    console.log(newTds);
 	    LoadAsOnTAS("onTAS_for_" + filename, newTds);
 	} else {
-	    console.log("worker ready");
-	    console.log(event.data);
 	    myWorker.ready = true;
 	    let msg = {	tds: tdsContents, tdp: tdpContents };
-	    console.log("lancement calcul");
-	    console.log(msg);
 	    myWorker.postMessage(msg);
-	    console.log("calcul lancé")
 	}
-	// 
     };
 
 }