From 6a02161b3797357455d955fe27600a9366cb18d9 Mon Sep 17 00:00:00 2001
From: Gary Talent <gary@drinkingtea.net>
Date: Tue, 2 Aug 2022 01:32:46 -0500
Subject: [PATCH] [nostalgia/player] Make sprites in demo scene auto-scroll

---
 src/nostalgia/player/app.cpp | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/src/nostalgia/player/app.cpp b/src/nostalgia/player/app.cpp
index 487740a0..5fa3ae51 100644
--- a/src/nostalgia/player/app.cpp
+++ b/src/nostalgia/player/app.cpp
@@ -6,24 +6,31 @@
 
 using namespace nostalgia;
 
-static unsigned spriteX = 72;
-static unsigned spriteY = 64;
+static int spriteX = 72;
+static int spriteY = 64;
 
 static int updateHandler(core::Context *ctx) noexcept {
+	int xmod = 0;
+	int ymod = 0;
 	if (core::buttonDown(ctx, core::GamePad_Right)) {
-		spriteX += 2;
+		xmod = 2;
 	} else if (core::buttonDown(ctx, core::GamePad_Left)) {
-		spriteX -= 2;
+		xmod = -2;
 	}
 	if (core::buttonDown(ctx, core::GamePad_Down)) {
-		spriteY += 2;
+		ymod = 2;
 	} else if (core::buttonDown(ctx, core::GamePad_Up)) {
-		spriteY -= 2;
+		ymod = -2;
 	}
+	if (!xmod && !ymod) {
+		spriteX += 2;
+	}
+	spriteX += xmod;
+	spriteY += ymod;
 	constexpr auto s = "nostalgia";
 	for (unsigned i = 0; s[i]; ++i) {
 		const auto c = static_cast<unsigned>(s[i] - ('a' - 1));
-		core::setSprite(ctx, i, spriteX + 8 * (i + 1), spriteY, c);
+		core::setSprite(ctx, i, static_cast<unsigned>(spriteX) + 8 * (i + 1), static_cast<unsigned>(spriteY), c);
 	}
 	return 16;
 }