Perancangan dan Penjelasan Game Processing Snake

Pada pembahasan kali ini saya akan membuat sebuah game "Snake" sederhana dengan menggunakan bahasa pemrograman Processing. Bagi Anda yang belum mempunyai program processing silahkan download di www.processing.org . Setelah di download ekstrak processing.rar nya maka folder processingnya akan berisi seperti gambar dibwah ini :

selanjutnya kita buka program processing.exe nya , berikut tampilannya : 

Setelah itu kita mulai membuat kodingan pada lembar kerja processing. Setelah semu kodingan sudah lengkap lalu kita save kodingan kita, caranya File > Save As lalu pilih di folder mana kita akan simpan kodingannya. Seperti gambar berikut :

                                            

Setelah di save lalu run kodingan yang telah kita buat dengan klik tombol play atau tekan Ctrl + R. Maka hasilnya akan jalan program game “Snake” sperti gambar dibawah ini :

pada game ini dimainkan oleh 1 orang , pemain harus memakan Food untuk menjadi besar , dan tidak boleh mengenai dinding agar permainan tidak berakhir. untuk menggerakan nya cukup menggeser mouse atau arah panah pada keyboard.

RULES

Aturan main (rules) pada game "Snake” adalah sebagai berikut:

• Pada game snake ini hanya bisa dimainkan oleh satu orang pemain.
• Untuk memulai permainan, otomatis setelah permainan ini terbuka. Dan pemain hanya tinggal menggerakkan ular tersebut untuk memakan Food (makanan) agar ular tersebut menjadi semakin panjang.
• Permainan selesai apabila pemain mengenai dinding pembatas telah habis.

LISTING PROGRAM

/* OpenProcessing Tweak of *@*http://www.openprocessing.org/sketch/65603*@* */

/* !do not delete the line above, required for linking your tweak if you re-upload */

/*

Snake

Simon Hajjar

11.05.12

*/

//Variables pertaining to the fundamental functioning

final int SCREEN_SIZE = 600; //Size of the screen

PFont font; //Font used in the game

int score = 0; //Score of the player

int rainbowFreq = 10, rainbowTimer = rainbowFreq; //Rainbow timers

PVector rainbowColor = new PVector(255, 255, 255); //The color of the rainbow color

boolean pauseState = false; //If the game is paused or not

boolean showInstructionMenu = true; //If the instruction menu should be shown

int superModeTimer = 0, superModeMax = 15, chanceOfSuperMode = 10; //If supermode is on

//Variables pertaining to the segments

ArrayList segments = new ArrayList(); //Creates an arraylist holding the segments

char currentDirection, lastDirection; //The current direction of the snake head

int segmentSize = 20; //Size of the segment

int snakeMovementTimer = 0, snakeMovementDelay = 4; //The timers for the snake's movement

boolean addSegmentNextUpdate = false; //If a segment should be added at the next update

//Variables pertaining to the food

Food food = new Food(); //Creates a new food

SuperFood superFood = null; //Creates the superfood

void setup() { //Main method

  size(600, 600, JAVA2D); //Creates a screen

  font = loadFont("FranklinGothic-MediumCond-48.vlw"); //Loads the font from the data folder

  textAlign(CENTER); //Aligns text to the center

  textFont(font, SCREEN_SIZE/25); //Sets the text font

  

  segments.add(new Segment(SCREEN_SIZE/2, SCREEN_SIZE/2)); //Adds the head of the snake

}

void draw() { //Continual loop

  if(!pauseState) rainbowTimer++; //Increments the rainbow color timer

  if(rainbowTimer >= rainbowFreq) { //If the time for color change

    rainbowColor = new PVector(random(255), random(255), random(255)); //Changes it to a random color

    rainbowTimer = 0; //Resets the rainbow timer

  }

  if(!pauseState) snakeMovementTimer++; //Increments the snake movement timer if not paused

  if(snakeMovementTimer == snakeMovementDelay) { //If the time for movement has come

    updateSnake(); //Update the snake

    snakeMovementTimer = 0; //Reset the timer

  }

  

  if(superModeTimer >= 0) superModeTimer--; //Decrements the super timer

  if(superFood == null && superModeTimer < 0 && !pauseState && !showInstructionMenu)

    if(random(1000) < chanceOfSuperMode) superFood = new SuperFood();

  

  background(35, 5 , 100); //Sets the background to white

  for(int i = 0; i < segments.size(); i++) //Checks each segment

    segments.get(i).renderSegment(); //Renders the segment

  food.renderFood(); //Renders the food

  if(superFood != null) superFood.renderFood(); //Renders superfood if it is not null

  

  fill(175);

  text("Nilai Anda: " + score, SCREEN_SIZE/2, segmentSize*6/5); //Writes the score for the player

  

  if(pauseState) { //If the game is paused

    fill(0, 10, 200, 100); //Fills a translucent black

    noStroke(); //Cancels the stroke

    rect(0, 0, SCREEN_SIZE, SCREEN_SIZE); //Cover the screen with a transluscent black

    fill(255); //Colors white

    text("Permainan Berhenti", SCREEN_SIZE/2, SCREEN_SIZE/2);

    text("Tekan 'P' Untuk Melanjutkan Permainan", SCREEN_SIZE/2, SCREEN_SIZE/2 + segmentSize*6/5);

  } else if(showInstructionMenu) { //If the instruction menu is shown

    text("Gunakan tombol arah pada keyboard", SCREEN_SIZE/2, SCREEN_SIZE*3/4);

    text("Tekan 'P' untuk berhenti sejenak", SCREEN_SIZE/2, SCREEN_SIZE*3/4 + segmentSize*6/5);

  }

}

void keyPressed() { //Called when a key is pressed

  switch(keyCode) { //Checks the key pressed

    case UP: if(segments.size() == 1 || lastDirection != 'S' && !pauseState) currentDirection = 'W'; break; //Changes direction to up

    case DOWN: if(segments.size() == 1 || lastDirection != 'W' && !pauseState) currentDirection = 'S'; break; //Changes direction to down

    case LEFT: if(segments.size() == 1 || lastDirection != 'D' && !pauseState) currentDirection = 'A'; break; //Changes direction to left

    case RIGHT: if(segments.size() == 1 || lastDirection != 'A' && !pauseState) currentDirection = 'D'; break; //Changes direction to right

    case 'P': case 'p': pauseState = !pauseState; break; //Toggles the pause

  }

  showInstructionMenu = false; //Take off the instruction menu

}

void updateSnake() { //Updates the snake's position

  if(addSegmentNextUpdate) //If must add a new segment

    segments.add(new Segment((int)segments.get(segments.size() - 1).location.x, (int)segments.get(segments.size() - 1).location.y)); //Adds a segment at the tail

  for(int i = segments.size() - 1; i > 0; i--) { //Checks each segments besides the head

    if(!addSegmentNextUpdate) segments.get(i).location = new PVector(segments.get(i - 1).location.x, segments.get(i - 1).location.y); //Sets the location to the block ahead

    addSegmentNextUpdate = false; //Removes the need to add a new segment

  }

  

  switch(currentDirection) { //Checks the current direction

    case 'W': segments.get(0).location.y -= segmentSize; break; //Moves the snake head up

    case 'S': segments.get(0).location.y += segmentSize; break; //Moves the snake head down

    case 'A': segments.get(0).location.x -= segmentSize; break; //Moves the snake head left

    case 'D': segments.get(0).location.x += segmentSize; break; //Moves the snake head right

  }

  lastDirection = currentDirection; //Sets the last direction used as the current direction

  

  for(int i = 2; i < segments.size(); i++) //Checks each segment besides the head

    if(superModeTimer < 0 && segments.get(i).location.x == segments.get(0).location.x && segments.get(i).location.y == segments.get(0).location.y) //If a segment hits the head

      startNewGame(); //Starts a new game

      

    if(segments.get(0).location.x >= SCREEN_SIZE || segments.get(0).location.x < 0)

      if(superModeTimer >= 0) segments.get(0).location.x = (segments.get(0).location.x >= SCREEN_SIZE) ? 0 : SCREEN_SIZE - segmentSize;

      else startNewGame();

        

    if(segments.get(0).location.y >= SCREEN_SIZE || segments.get(0).location.y < 0)

      if(superModeTimer >= 0) segments.get(0).location.y = (segments.get(0).location.y >= SCREEN_SIZE) ? 0 : SCREEN_SIZE - segmentSize;

      else startNewGame();

}

void startNewGame() { //Starts a new game

  superFood = null; //Nullifies the super food

  score = 0; //Resets the score

  segments.clear(); //Clears all segments

  segments.add(new Segment(SCREEN_SIZE/2, SCREEN_SIZE/2)); //Adds the head of the snake

  snakeMovementTimer = 0; //Reset the timer

  currentDirection = 'Q'; //Nullifys the current direction

  keyCode = '+'; //Nullifys the keyCode

  food = new Food(); //Resets the food

  showInstructionMenu = true; //Show the instruction menu

}

Referensi : http://processing.org/