to check for r and p use key instead of keycode Greetings, Chrisir If you need an answer, please send me a personal message since this forum doesn't notify.

when you display the game over you can
show a text line

1.     text(snakeSize*10, 100, 130, 40);

Greetings, Chrisir

If you need an answer, please send me a personal message since this forum doesn't notify.

An alternative keyPressed():

final static byte NORTH = 1, SOUTH = 2;
final static byte WEST = 3, EAST = 4;
byte dir;

void keyPressed() {
  final int k = keyCode;

  if      (k == UP)      dir = NORTH;
  else if (k == DOWN)    dir = SOUTH;
  else if (k == LEFT)    dir = WEST;
  else if (k == RIGHT)   dir = EAST;

  else if (k == 'R')     reset();
  else if (k == 'P')     pause();
}

To check for 'r' and 'p' use key instead of keyCode .

I don't get why checking alphanumeric keys using key would be any better
than just keyCode for everything! 

Variable key got more verbosity b/c it needs to check for both upper & lower cases.
Unless key is 1st converted to either of its cases.

---

if      (key == 'R' | key == 'r')   reset();
else if (key == 'P' | key == 'p')   pause();

---

Checking using keyCode is both more uniformity & less verbosity. And consequently, speedier: 

---

final int k = keyCode;

if      (k == 'R')     reset();
else if (k == 'P')     pause();

---

hello,

here we go

I used a new var named paused for pause.
The phrase
pause = ! pause;
just means "give pause the opposite value it has now".
So when it is false it gets true and vice versa.
The sign ! just says the opposite (not).
It works only for boolean vars.
It's checked twice and if true the movement is stopped

For score I just used snakesize * 10 

Also you had in size ( )  P3D which is for 3D
I removed that.
So text needs only 3 parameters not 4. I haven't done this.

Instead of   if (gameOver == false) {
you can write   if (!gameOver) {
because ! means not.

you might also consider calling reset from setup() so there are a few lines you could delete in
setup() - they are duplicates. I haven't done this.

I made the relevant parts bold.

Greetings, Chrisir    


If you need an answer, please send me a personal message since this forum doesn't notify.


color col=color(57, 185, 247);
color foodColor = color(240, 109, 227);
float speed = 50;
int cx, cy;

int moveX = 0;
int moveY = 0;
int snakeX = 0;
int snakeY = 0;
int foodX = -1;
int foodY = -1;

boolean check = true;
int []snakesX;
int []snakesY;
int snakeSize = 1;
int windowSize = 200;
boolean gameOver = false;
boolean paused = false;
PFont Font = createFont("Times New Roman", 20, true);


void setup() {
  size(int(windowSize), int(windowSize));

  background(0);
  speed = 50;
  speed=speed/frameRate;
  snakesX = new int[100];
  snakesY = new int[100];

  cx = width/2;
  cy = height/2;

  snakeX = cx-5;
  snakeY = cy-5;
  foodX = -1;
  foodY = -1;
  gameOver = false;
  check = true;
  snakeSize =1;
}

void draw() {
  if (speed%10 == 0) {
    background(0);
    runGame();
  }
  speed++;
}
void reset() {
  snakeX = cx-5;
  snakeY = cy-5;
  gameOver = false;
  paused   = false;
  check = true;
  snakeSize =1;
  moveY = 0;
  moveX = 0;
}
void runGame() {
  if (gameOver == false) {
    drawfood();
    drawSnake();

    fill(255);    // draw score
    textSize(11);
    text("score: "+(snakeSize-1)*10, 10, 22);

    if (!paused) {
      snakeMove();
    }
    else {
      textSize(12);
      text("paused.", 12, height-20);
    }
    ateFood();
    checkHitSelf();
  }
  else {
    String modelString = "game over";
    textAlign (CENTER);
    textFont(Font);
    textSize(30);
    text(modelString, 100, 100, 40);
    textSize(16);
    text("score: "+(snakeSize-1)*10, 100, 130, 40);
  }
}
void checkHitSelf() {
  for (int i = 1; i < snakeSize; i++) {
    if (snakeX == snakesX[i] && snakeY== snakesY[i]) {
      gameOver = true;
    }
  }
}
void ateFood() {
  if (foodX == snakeX && foodY == snakeY) {
    check = true;
    snakeSize++;
  }
}
void drawfood() {
  fill(foodColor);
  while (check) {
    int x = (int)random(1, windowSize/10);
    int y =  (int)random(1, windowSize/10);
    foodX = 5+x*10;
    foodY = 5+y*10;

    for (int i = 0; i < snakeSize; i++) {
      if (x == snakesX[i] && y == snakesY[i]) {
        check = true;
        i = snakeSize;
      }
      else {
        check = false;
      }
    }
  }

  rect(foodX-5, foodY-5, 10, 10);
}
void drawSnake() {
  fill(col);

  for (int i = 0; i < snakeSize; i++) {
    int X = snakesX[i];
    int Y = snakesY[i];
    rect(X-5, Y-5, 10, 10);
  }
  if (!paused) {
    for (int i = snakeSize; i > 0; i--) {
      snakesX[i] = snakesX[i-1];
      snakesY[i] = snakesY[i-1];
    }
  }
}

void snakeMove() {
  snakeX += moveX;
  snakeY += moveY;
  if (snakeX > windowSize-5 || snakeX < 5||snakeY > windowSize-5||snakeY < 5) {
    gameOver = true;
  }
  snakesX[0] = snakeX;
  snakesY[0] = snakeY;
}

void keyPressed() {
  if (keyCode == UP) { 
    if (snakesY[1] != snakesY[0]-10) {
      moveY = -10;
      moveX = 0;
    }
  }
  if (keyCode == DOWN) { 
    if (snakesY[1] != snakesY[0]+10) {
      moveY = 10;
      moveX = 0;
    }
  }
  if (keyCode == LEFT) {
    if (snakesX[1] != snakesX[0]-10) {
      moveX = -10;
      moveY = 0;
    }
  }
  if (keyCode == RIGHT) {
    if (snakesX[1] != snakesX[0]+10) {
      moveX = 10;
      moveY = 0;
    }
  }
  if (keyCode == 'R' || keyCode == 'r') {
    reset();
  }
  if (keyCode == 'P' || keyCode == 'p') {
    paused=!paused;
  }
}
//

Variable keyCode can't come w/ lower case letters. Only key have both cases.
So, checking if ( keyCode == ' r '); and such is redundant.

if      (keyCode == 'R')   reset();
else if (keyCode == 'P')   paused = !paused;

it worked but how do I get it to restart with the spacebar?

at the moment you restart with 'r'

so

  if ( keyCode == 'R' || keyCode == ' ' ) {

                                                                 here is the space ( write ' then space, then ' )

Greetings, Chrisir

If you need an answer, please send me a personal message since this forum doesn't notify.

how should my code look?

your current line is

1.   if (keyCode == 'R' || keyCode == 'r') {

change it to

1.   if (keyCode == 'R' || keyCode == ' ') {

Greetings, Chrisir

If you need an answer, please send me a personal message since this forum doesn't notify.

Thank you so much

no problem!


Greetings, Chrisir