1 /*******************************************************************************************
2 *
3 * raylib [shapes] example - bouncing ball
4 *
5 * This example has been created using raylib 1.0 (www.raylib.com)
6 * raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
7 *
8 * Copyright (c) 2013 Ramon Santamaria (@raysan5)
9 *
10 ********************************************************************************************/
11
12 #include "raylib.h"
13
main(void)14 int main(void)
15 {
16 // Initialization
17 //---------------------------------------------------------
18 const int screenWidth = 800;
19 const int screenHeight = 450;
20
21 InitWindow(screenWidth, screenHeight, "raylib [shapes] example - bouncing ball");
22
23 Vector2 ballPosition = { GetScreenWidth()/2, GetScreenHeight()/2 };
24 Vector2 ballSpeed = { 5.0f, 4.0f };
25 int ballRadius = 20;
26
27 bool pause = 0;
28 int framesCounter = 0;
29
30 SetTargetFPS(60); // Set our game to run at 60 frames-per-second
31 //----------------------------------------------------------
32
33 // Main game loop
34 while (!WindowShouldClose()) // Detect window close button or ESC key
35 {
36 // Update
37 //-----------------------------------------------------
38 if (IsKeyPressed(KEY_SPACE)) pause = !pause;
39
40 if (!pause)
41 {
42 ballPosition.x += ballSpeed.x;
43 ballPosition.y += ballSpeed.y;
44
45 // Check walls collision for bouncing
46 if ((ballPosition.x >= (GetScreenWidth() - ballRadius)) || (ballPosition.x <= ballRadius)) ballSpeed.x *= -1.0f;
47 if ((ballPosition.y >= (GetScreenHeight() - ballRadius)) || (ballPosition.y <= ballRadius)) ballSpeed.y *= -1.0f;
48 }
49 else framesCounter++;
50 //-----------------------------------------------------
51
52 // Draw
53 //-----------------------------------------------------
54 BeginDrawing();
55
56 ClearBackground(RAYWHITE);
57
58 DrawCircleV(ballPosition, ballRadius, MAROON);
59 DrawText("PRESS SPACE to PAUSE BALL MOVEMENT", 10, GetScreenHeight() - 25, 20, LIGHTGRAY);
60
61 // On pause, we draw a blinking message
62 if (pause && ((framesCounter/30)%2)) DrawText("PAUSED", 350, 200, 30, GRAY);
63
64 DrawFPS(10, 10);
65
66 EndDrawing();
67 //-----------------------------------------------------
68 }
69
70 // De-Initialization
71 //---------------------------------------------------------
72 CloseWindow(); // Close window and OpenGL context
73 //----------------------------------------------------------
74
75 return 0;
76 }