git subrepo clone (merge) https://github.com/HarbourMasters/otrgui.git OTRGui

subrepo:
  subdir:   "OTRGui"
  merged:   "a6066a251"
upstream:
  origin:   "https://github.com/HarbourMasters/otrgui.git"
  branch:   "master"
  commit:   "a6066a251"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

OTRGui/libs/raylib/examples/shapes/shapes_bouncing_ball.c

@@ -0,0 +1,76 @@
+/*******************************************************************************************
+*
+*   raylib [shapes] example - bouncing ball
+*
+*   This example has been created using raylib 1.0 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Copyright (c) 2013 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+int main(void)
+{
+    // Initialization
+    //---------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [shapes] example - bouncing ball");
+
+    Vector2 ballPosition = { GetScreenWidth()/2.0f, GetScreenHeight()/2.0f };
+    Vector2 ballSpeed = { 5.0f, 4.0f };
+    int ballRadius = 20;
+
+    bool pause = 0;
+    int framesCounter = 0;
+
+    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
+    //----------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //-----------------------------------------------------
+        if (IsKeyPressed(KEY_SPACE)) pause = !pause;
+
+        if (!pause)
+        {
+            ballPosition.x += ballSpeed.x;
+            ballPosition.y += ballSpeed.y;
+
+            // Check walls collision for bouncing
+            if ((ballPosition.x >= (GetScreenWidth() - ballRadius)) || (ballPosition.x <= ballRadius)) ballSpeed.x *= -1.0f;
+            if ((ballPosition.y >= (GetScreenHeight() - ballRadius)) || (ballPosition.y <= ballRadius)) ballSpeed.y *= -1.0f;
+        }
+        else framesCounter++;
+        //-----------------------------------------------------
+
+        // Draw
+        //-----------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+
+            DrawCircleV(ballPosition, (float)ballRadius, MAROON);
+            DrawText("PRESS SPACE to PAUSE BALL MOVEMENT", 10, GetScreenHeight() - 25, 20, LIGHTGRAY);
+
+            // On pause, we draw a blinking message
+            if (pause && ((framesCounter/30)%2)) DrawText("PAUSED", 350, 200, 30, GRAY);
+
+            DrawFPS(10, 10);
+
+        EndDrawing();
+        //-----------------------------------------------------
+    }
+
+    // De-Initialization
+    //---------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //----------------------------------------------------------
+
+    return 0;
+}