From 00289d5ffabf9895a4d7c1cbaf8c813af1db1cb1 Mon Sep 17 00:00:00 2001
From: yangxvlin <1768528843@qq.com>
Date: Wed, 31 Mar 2021 23:05:58 +1100
Subject: [PATCH] finish Q5d
---
src/Ball.java | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/src/Ball.java b/src/Ball.java
index ae30fca..4621ba3 100644
--- a/src/Ball.java
+++ b/src/Ball.java
@@ -48,6 +48,18 @@ public class Ball {
}
public void update() {
+ // (d) Extend the code to make the ball choose a random diagonal direction, and move in that direction.
+ // - When the ball reaches the left and right edges of the window, it should reverse horizontal direction.
+ // - Similarly, when the ball reaches the top and bottom edges of the window, it should reverse vertical direction.
+ // You can change the step size of player and ball when simulating.
+ // When the ball reaches the left and right edges of the window, it should reverse horizontal direction.
+ if (x < 0 || x > Window.getWidth()) {
+ directionX *= -1;
+ }
+ // Similarly, when the ball reaches the top and bottom edges of the window, it should reverse vertical direction.
+ if (y < 0 || y > Window.getHeight()) {
+ directionY *= -1;
+ }
// (a)
x += directionX * STEP_SIZE;
--
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