migrat a SDL3

source/defines.h

@@ -1,14 +1,17 @@
 #pragma once
 
-#define WINDOW_CAPTION "demo_pelotas2"
-#define SCREEN_WIDTH 320
-#define SCREEN_HEIGHT 240
-#define WINDOW_SIZE 3
-#define BALL_SIZE 8
-#define GRAVITY 0.2f
-#define TEXT_TIME 100
+constexpr char WINDOW_CAPTION[] = "demo5_sprites_bouncing";
 
-struct color_t
+constexpr int SCREEN_WIDTH = 320;
+constexpr int SCREEN_HEIGHT = 240;
+constexpr int WINDOW_SIZE = 3;
+constexpr int BALL_SIZE = 8;
+constexpr float GRAVITY_FORCE = 0.2f;
+
+constexpr Uint64 DEMO_SPEED = 1000 / 60;
+constexpr Uint64 TEXT_DURATION = 2000;
+
+struct Color
 {
-    int r,g,b;
+    int r, g, b;
 };