/*******************************************************************************************
*
*   raylib [core] example - Basic window
*
*   Welcome to raylib!
*
*   To test examples, just press F6 and execute raylib_compile_execute script
*   Note that compiled executable is placed in the same folder as .c file
*
*   You can find all basic examples on C:\raylib\raylib\examples folder or
*   raylib official webpage: www.raylib.com
*
*   Enjoy using raylib. :)
*
*   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) 2013-2016 Ramon Santamaria (@raysan5)
*
********************************************************************************************/

#include "raylib.h"

int main()
{
    // Initialization
    //--------------------------------------------------------------------------------------
    int screenWidth = 800;
    int screenHeight = 450;

    InitWindow(screenWidth, screenHeight, "raylib [core] example - basic window");

    Rectangle rec = {0, 0, screenWidth, screenHeight};
    Color recColor = BLACK;

    bool fadeOut = true;
    float alpha = 0;
    float fadeSpeed = 0.01f;

    SetTargetFPS(60);
    //--------------------------------------------------------------------------------------

    // Main game loop
    while (!WindowShouldClose())    // Detect window close button or ESC key
    {
        // Update
        //----------------------------------------------------------------------------------
        // TODO: Update your variables here
        if(fadeOut)
        {
            alpha += fadeSpeed;

            if(alpha >= 1.0f)
            {
                alpha = 1.0f;
            }
        }
        else
        {
            alpha -= fadeSpeed;
            if(alpha <= 0.0f)
            {
                alpha = 0.0f;
            }
        }

        if(IsKeyPressed(KEY_SPACE))
        {
            fadeOut = !fadeOut;
        }
        //----------------------------------------------------------------------------------

        // Draw
        //----------------------------------------------------------------------------------
        BeginDrawing();

            ClearBackground(RAYWHITE);

            DrawRectangleRec(rec, Fade(recColor, alpha));

            DrawText(FormatText("%f", alpha), 10,10, 20, WHITE);


        EndDrawing();
        //----------------------------------------------------------------------------------
    }

    // De-Initialization
    //--------------------------------------------------------------------------------------
    CloseWindow();        // Close window and OpenGL context
    //--------------------------------------------------------------------------------------

    return 0;
}