From 054a99cf6c6a8eff181724ceebd5cd3539c62743 Mon Sep 17 00:00:00 2001 From: Reinhold Gschweicher Date: Sat, 30 Oct 2021 22:25:42 +0200 Subject: [PATCH] Paddle: add a little randomization in the dy speed To make the game a bit more challenging an less predictable add a little bit of randomness to the `dy` value. When hitting the right wall add a random number (one of [-1, 0, 1]) to the `dy` value. To keep the difficulty level managable limit the dy value to be in the range from -5 to 5. --- src/displayapp/screens/Paddle.cpp | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/src/displayapp/screens/Paddle.cpp b/src/displayapp/screens/Paddle.cpp index aa3420dc..608eb644 100644 --- a/src/displayapp/screens/Paddle.cpp +++ b/src/displayapp/screens/Paddle.cpp @@ -2,6 +2,8 @@ #include "displayapp/DisplayApp.h" #include "displayapp/LittleVgl.h" +#include // for rand() + using namespace Pinetime::Applications::Screens; Paddle::Paddle(Pinetime::Applications::DisplayApp* app, Pinetime::Components::LittleVgl& lvgl) : Screen(app), lvgl {lvgl} { @@ -50,6 +52,13 @@ void Paddle::Refresh() { // checks if it has touched the side (right side) if (ballX >= LV_HOR_RES - ballSize - 1) { dx *= -1; + dy += rand() % 3 - 1; // add a little randomization in wall bounce direction, one of [-1, 0, 1] + if (dy > 5) { // limit dy to be in range [-5 to 5] + dy = 5; + } + if (dy < -5) { + dy = -5; + } } // checks if it is in the position of the paddle