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/*******************************************************************************************
*
* 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"
#if defined(PLATFORM_WEB)
#include <emscripten/emscripten.h>
#endif
//----------------------------------------------------------------------------------
// Global Variables Definition
//----------------------------------------------------------------------------------
const int screenWidth = 800;
const int screenHeight = 450;
// NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required)
Vector2 ballPosition = { 0.0f };
Vector2 ballSpeed = { 5.0f, 4.0f };
int ballRadius = 20;
static bool pause = 0;
int framesCounter = 0;
//----------------------------------------------------------------------------------
// Module Functions Declaration
//----------------------------------------------------------------------------------
void UpdateDrawFrame(void); // Update and Draw one frame
//----------------------------------------------------------------------------------
// Program Main Entry Point
//----------------------------------------------------------------------------------
int main(void)
{
// Initialization
//---------------------------------------------------------
InitWindow(screenWidth, screenHeight, "raylib [shapes] example - bouncing ball");
ballPosition = (Vector2){ GetScreenWidth()/2, GetScreenHeight()/2 };
#if defined(PLATFORM_WEB)
emscripten_set_main_loop(UpdateDrawFrame, 0, 1);
#else
SetTargetFPS(60); // Set our game to run at 60 frames-per-second
//--------------------------------------------------------------------------------------
// Main game loop
while (!WindowShouldClose()) // Detect window close button or ESC key
{
UpdateDrawFrame();
}
#endif
// De-Initialization
//---------------------------------------------------------
CloseWindow(); // Close window and OpenGL context
//----------------------------------------------------------
return 0;
}
//----------------------------------------------------------------------------------
// Module Functions Definition
//----------------------------------------------------------------------------------
void UpdateDrawFrame(void)
{
// 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, 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();
//-----------------------------------------------------
}
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