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-rw-r--r--games/snake.c286
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diff --git a/games/snake.c b/games/snake.c
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-/*******************************************************************************************
-*
-* raylib - sample game: snake
-*
-* Sample game developed by Ian Eito, Albert Martos and Ramon Santamaria
-*
-* This game has been created using raylib v1.3 (www.raylib.com)
-* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
-*
-* Copyright (c) 2015 Ramon Santamaria (@raysan5)
-*
-********************************************************************************************/
-
-#include "raylib.h"
-
-#if defined(PLATFORM_WEB)
- #include <emscripten/emscripten.h>
-#endif
-
-//----------------------------------------------------------------------------------
-// Some Defines
-//----------------------------------------------------------------------------------
-#define SNAKE_LENGTH 256
-#define SQUARE_SIZE 31
-
-//----------------------------------------------------------------------------------
-// Types and Structures Definition
-//----------------------------------------------------------------------------------
-typedef struct Snake {
- Vector2 position;
- Vector2 size;
- Vector2 speed;
- Color color;
-} Snake;
-
-typedef struct Food {
- Vector2 position;
- Vector2 size;
- bool active;
- Color color;
-} Food;
-
-//------------------------------------------------------------------------------------
-// Global Variables Declaration
-//------------------------------------------------------------------------------------
-static const int screenWidth = 800;
-static const int screenHeight = 450;
-
-static int framesCounter = 0;
-static bool gameOver = false;
-static bool pause = false;
-
-static Food fruit = { 0 };
-static Snake snake[SNAKE_LENGTH] = { 0 };
-static Vector2 snakePosition[SNAKE_LENGTH] = { 0 };
-static bool allowMove = false;
-static Vector2 offset = { 0 };
-static int counterTail = 0;
-
-//------------------------------------------------------------------------------------
-// Module Functions Declaration (local)
-//------------------------------------------------------------------------------------
-static void InitGame(void); // Initialize game
-static void UpdateGame(void); // Update game (one frame)
-static void DrawGame(void); // Draw game (one frame)
-static void UnloadGame(void); // Unload game
-static void UpdateDrawFrame(void); // Update and Draw (one frame)
-
-//------------------------------------------------------------------------------------
-// Program main entry point
-//------------------------------------------------------------------------------------
-int main(void)
-{
- // Initialization (Note windowTitle is unused on Android)
- //---------------------------------------------------------
- InitWindow(screenWidth, screenHeight, "sample game: snake");
-
- InitGame();
-
-#if defined(PLATFORM_WEB)
- emscripten_set_main_loop(UpdateDrawFrame, 0, 1);
-#else
- SetTargetFPS(60);
- //--------------------------------------------------------------------------------------
-
- // Main game loop
- while (!WindowShouldClose()) // Detect window close button or ESC key
- {
- // Update and Draw
- //----------------------------------------------------------------------------------
- UpdateDrawFrame();
- //----------------------------------------------------------------------------------
- }
-#endif
- // De-Initialization
- //--------------------------------------------------------------------------------------
- UnloadGame(); // Unload loaded data (textures, sounds, models...)
-
- CloseWindow(); // Close window and OpenGL context
- //--------------------------------------------------------------------------------------
-
- return 0;
-}
-
-//------------------------------------------------------------------------------------
-// Module Functions Definitions (local)
-//------------------------------------------------------------------------------------
-
-// Initialize game variables
-void InitGame(void)
-{
- framesCounter = 0;
- gameOver = false;
- pause = false;
-
- counterTail = 1;
- allowMove = false;
-
- offset.x = screenWidth%SQUARE_SIZE;
- offset.y = screenHeight%SQUARE_SIZE;
-
- for (int i = 0; i < SNAKE_LENGTH; i++)
- {
- snake[i].position = (Vector2){ offset.x/2, offset.y/2 };
- snake[i].size = (Vector2){ SQUARE_SIZE, SQUARE_SIZE };
- snake[i].speed = (Vector2){ SQUARE_SIZE, 0 };
-
- if (i == 0) snake[i].color = DARKBLUE;
- else snake[i].color = BLUE;
- }
-
- for (int i = 0; i < SNAKE_LENGTH; i++)
- {
- snakePosition[i] = (Vector2){ 0.0f, 0.0f };
- }
-
- fruit.size = (Vector2){ SQUARE_SIZE, SQUARE_SIZE };
- fruit.color = SKYBLUE;
- fruit.active = false;
-}
-
-// Update game (one frame)
-void UpdateGame(void)
-{
- if (!gameOver)
- {
- if (IsKeyPressed('P')) pause = !pause;
-
- if (!pause)
- {
- // Player control
- if (IsKeyPressed(KEY_RIGHT) && (snake[0].speed.x == 0) && allowMove)
- {
- snake[0].speed = (Vector2){ SQUARE_SIZE, 0 };
- allowMove = false;
- }
- if (IsKeyPressed(KEY_LEFT) && (snake[0].speed.x == 0) && allowMove)
- {
- snake[0].speed = (Vector2){ -SQUARE_SIZE, 0 };
- allowMove = false;
- }
- if (IsKeyPressed(KEY_UP) && (snake[0].speed.y == 0) && allowMove)
- {
- snake[0].speed = (Vector2){ 0, -SQUARE_SIZE };
- allowMove = false;
- }
- if (IsKeyPressed(KEY_DOWN) && (snake[0].speed.y == 0) && allowMove)
- {
- snake[0].speed = (Vector2){ 0, SQUARE_SIZE };
- allowMove = false;
- }
-
- // Snake movement
- for (int i = 0; i < counterTail; i++) snakePosition[i] = snake[i].position;
-
- if ((framesCounter%5) == 0)
- {
- for (int i = 0; i < counterTail; i++)
- {
- if (i == 0)
- {
- snake[0].position.x += snake[0].speed.x;
- snake[0].position.y += snake[0].speed.y;
- allowMove = true;
- }
- else snake[i].position = snakePosition[i-1];
- }
- }
-
- // Wall behaviour
- if (((snake[0].position.x) > (screenWidth - offset.x)) ||
- ((snake[0].position.y) > (screenHeight - offset.y)) ||
- (snake[0].position.x < 0) || (snake[0].position.y < 0))
- {
- gameOver = true;
- }
-
- // Collision with yourself
- for (int i = 1; i < counterTail; i++)
- {
- if ((snake[0].position.x == snake[i].position.x) && (snake[0].position.y == snake[i].position.y)) gameOver = true;
- }
-
- // Fruit position calculation
- if (!fruit.active)
- {
- fruit.active = true;
- fruit.position = (Vector2){ GetRandomValue(0, (screenWidth/SQUARE_SIZE) - 1)*SQUARE_SIZE + offset.x/2, GetRandomValue(0, (screenHeight/SQUARE_SIZE) - 1)*SQUARE_SIZE + offset.y/2 };
-
- for (int i = 0; i < counterTail; i++)
- {
- while ((fruit.position.x == snake[i].position.x) && (fruit.position.y == snake[i].position.y))
- {
- fruit.position = (Vector2){ GetRandomValue(0, (screenWidth/SQUARE_SIZE) - 1)*SQUARE_SIZE + offset.x/2, GetRandomValue(0, (screenHeight/SQUARE_SIZE) - 1)*SQUARE_SIZE + offset.y/2 };
- i = 0;
- }
- }
- }
-
- // Collision
- if ((snake[0].position.x < (fruit.position.x + fruit.size.x) && (snake[0].position.x + snake[0].size.x) > fruit.position.x) &&
- (snake[0].position.y < (fruit.position.y + fruit.size.y) && (snake[0].position.y + snake[0].size.y) > fruit.position.y))
- {
- snake[counterTail].position = snakePosition[counterTail - 1];
- counterTail += 1;
- fruit.active = false;
- }
-
- framesCounter++;
- }
- }
- else
- {
- if (IsKeyPressed(KEY_ENTER))
- {
- InitGame();
- gameOver = false;
- }
- }
-}
-
-// Draw game (one frame)
-void DrawGame(void)
-{
- BeginDrawing();
-
- ClearBackground(RAYWHITE);
-
- if (!gameOver)
- {
- // Draw grid lines
- for (int i = 0; i < screenWidth/SQUARE_SIZE + 1; i++)
- {
- DrawLineV((Vector2){SQUARE_SIZE*i + offset.x/2, offset.y/2}, (Vector2){SQUARE_SIZE*i + offset.x/2, screenHeight - offset.y/2}, LIGHTGRAY);
- }
-
- for (int i = 0; i < screenHeight/SQUARE_SIZE + 1; i++)
- {
- DrawLineV((Vector2){offset.x/2, SQUARE_SIZE*i + offset.y/2}, (Vector2){screenWidth - offset.x/2, SQUARE_SIZE*i + offset.y/2}, LIGHTGRAY);
- }
-
- // Draw snake
- for (int i = 0; i < counterTail; i++) DrawRectangleV(snake[i].position, snake[i].size, snake[i].color);
-
- // Draw fruit to pick
- DrawRectangleV(fruit.position, fruit.size, fruit.color);
-
- if (pause) DrawText("GAME PAUSED", screenWidth/2 - MeasureText("GAME PAUSED", 40)/2, screenHeight/2 - 40, 40, GRAY);
- }
- else DrawText("PRESS [ENTER] TO PLAY AGAIN", GetScreenWidth()/2 - MeasureText("PRESS [ENTER] TO PLAY AGAIN", 20)/2, GetScreenHeight()/2 - 50, 20, GRAY);
-
- EndDrawing();
-}
-
-// Unload game variables
-void UnloadGame(void)
-{
- // TODO: Unload all dynamic loaded data (textures, sounds, models...)
-}
-
-// Update and Draw (one frame)
-void UpdateDrawFrame(void)
-{
- UpdateGame();
- DrawGame();
-}
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