1 files changed, 30 insertions, 1 deletions
diff --git a/game.js b/game.js
index 4be774a..77d4151 100644
--- a/game.js
+++ b/game.js
@@ -85,6 +85,16 @@ function displayStatus(msg) {
 	document.getElementById("status").innerHTML = msg;
 }
 
+function displayScore(score) {
+	document.getElementById("score").classList.remove("invisible");
+	document.getElementById("score-left").innerHTML = score[0];
+	document.getElementById("score-right").innerHTML = score[1];
+
+	setTimeout(function() {
+		document.getElementById("score").classList.add("invisible");
+	}, 2000);
+}
+
 function openGame() {
 	socket = io();
 	socket.on("redirect", function(url) {
@@ -95,6 +105,10 @@ function openGame() {
 		displayStatus(msg);
 	});
 
+	socket.on("score", function(score) {
+		displayScore(score);
+	});
+
 	socket.on("serve", function(side, x, y) {
 		playing = true;
 		flip = side == "right";
@@ -151,7 +165,12 @@ function stopGraphicsLoop() {
 function startPhysicsLoop() {
 	var interval = 1 / 120;
 	physicsLoopId = setInterval(function() {
-		advancePhysics(interval);
+		if (advancePhysics(interval)) {
+			socket.emit("ballvec", ballX, ballY, ballVX, ballVY);
+		}
+		if (ballX < -ballRadius) {
+			socket.emit("ballout");
+		}
 	}, interval * 1000);
 }
 
@@ -168,7 +187,10 @@ function initPhysics() {
 	padVel = pad2Vel = 0;
 }
 
+// Returns whether a new ballvec should be sent
 function advancePhysics(deltaT) {
+	var sendBallvec = false;
+
 	var newballX = ballX + ballVX * deltaT;
 	var newballY = ballY + ballVY * deltaT;
 	var newpadPos = padPos + padVel * deltaT;
@@ -190,6 +212,7 @@ function advancePhysics(deltaT) {
 	if (newballX <= padX + padWidth + ballRadius &&
 				Math.abs(newballY - padPos) < padHeight / 2 + ballRadius) {
 		t = (padX + padWidth + ballRadius - ballX) / ballVX;
+		sendBallvec = true;  // rebound from *our* pad
 	} else if (newballX >= 1 - (padX + padWidth + ballRadius) &&
 				Math.abs(newballY - pad2Pos) < padHeight / 2 + ballRadius) {
 		t = (1 - (padX + padWidth + ballRadius) - ballX) / ballVX;
@@ -201,10 +224,16 @@ function advancePhysics(deltaT) {
 		ballVX = -ballVX;
 	}
 
+	if ((ballX < 0.5) ^ (newballX < 0.5)) {
+		sendBallvec = true;
+	}
+
 	ballX = newballX;
 	ballY = newballY;
 	padPos = newpadPos;
 	pad2Pos = newpad2Pos;
+
+	return sendBallvec;
 }
 
 function setupBindings() {