81 lines
2.9 KiB
C
81 lines
2.9 KiB
C
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/*******************************************************************************************
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*
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* raylib [shapes] example - bouncing ball
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*
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* Example originally created with raylib 2.5, last time updated with raylib 2.5
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*
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* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
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* BSD-like license that allows static linking with closed source software
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*
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* Copyright (c) 2013-2023 Ramon Santamaria (@raysan5)
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*
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********************************************************************************************/
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#include "raylib.h"
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//------------------------------------------------------------------------------------
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// Program main entry point
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//------------------------------------------------------------------------------------
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int main(void)
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{
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// Initialization
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//---------------------------------------------------------
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const int screenWidth = 800;
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const int screenHeight = 450;
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InitWindow(screenWidth, screenHeight, "raylib [shapes] example - bouncing ball");
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Vector2 ballPosition = { GetScreenWidth()/2.0f, GetScreenHeight()/2.0f };
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Vector2 ballSpeed = { 5.0f, 4.0f };
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int ballRadius = 20;
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bool pause = 0;
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int framesCounter = 0;
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SetTargetFPS(60); // Set our game to run at 60 frames-per-second
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//----------------------------------------------------------
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// Main game loop
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while (!WindowShouldClose()) // Detect window close button or ESC key
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{
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// Update
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//-----------------------------------------------------
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if (IsKeyPressed(KEY_SPACE)) pause = !pause;
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if (!pause)
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{
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ballPosition.x += ballSpeed.x;
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ballPosition.y += ballSpeed.y;
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// Check walls collision for bouncing
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if ((ballPosition.x >= (GetScreenWidth() - ballRadius)) || (ballPosition.x <= ballRadius)) ballSpeed.x *= -1.0f;
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if ((ballPosition.y >= (GetScreenHeight() - ballRadius)) || (ballPosition.y <= ballRadius)) ballSpeed.y *= -1.0f;
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}
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else framesCounter++;
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//-----------------------------------------------------
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// Draw
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//-----------------------------------------------------
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BeginDrawing();
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ClearBackground(RAYWHITE);
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DrawCircleV(ballPosition, (float)ballRadius, MAROON);
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DrawText("PRESS SPACE to PAUSE BALL MOVEMENT", 10, GetScreenHeight() - 25, 20, LIGHTGRAY);
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// On pause, we draw a blinking message
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if (pause && ((framesCounter/30)%2)) DrawText("PAUSED", 350, 200, 30, GRAY);
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DrawFPS(10, 10);
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EndDrawing();
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//-----------------------------------------------------
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}
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// De-Initialization
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//---------------------------------------------------------
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CloseWindow(); // Close window and OpenGL context
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//----------------------------------------------------------
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return 0;
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}
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