Tron Light Cycle project I'm making

Processing Coding Questions
1

JAVA**
so im trying to move my point continuously when a key is pressed it will only move that direction.

//arrow keys to draw
float x,y;
int speedY = 0;
int speedX = 1;

void setup(){
 size(500,500); 
 background(255,255,255);  //background white
 x=150;
 y=150;
 stroke(0,0,0);  //pen black
}

void draw(){
  stroke(255,0,0);
  point(x,y);  //draw a point at current (x,y) 
  updatepoint();
}




void updatepoint(){
  x = x + speedX;
  y = y - speedY;
  
}
void keyPressed(){
 if(key == CODED)
  {
    if (keyCode == UP && y>=0){ //restrict to screen edge
      y=y-1;
    }
    else if(keyCode == DOWN && y<=500){
          y=y+1;
    }
    else if (keyCode == LEFT && x>=0){
      x=x-1;
    }
    else if (keyCode == RIGHT && x<=500){
      x=x+1;
    }
  }
}

i was trying to use speedX and SpeedY but the next mistake happens when instead a continuous trail, it just makes multiple dots.

2

Hey, and welcome to the forum!

Great to have you here!

You need to change speed.

In this version though, for example RIGHT key always means east (absolute);
you could also make it so he can only turn left and right (relative)

Warm regards,

Chrisir

//arrow keys to steer
float x, y;
int speedY = 0;
int speedX = 1;

void setup() {
  size(500, 500); 
  background(255, 255, 255);  //background white
  x=150;
  y=150;
  stroke(0, 0, 0);  //pen black
}

void draw() {
  stroke(255, 0, 0);
  point(x, y);  //draw a point at current (x,y) 
  updatepoint();
}

void updatepoint() {
  x = x + speedX;
  y = y + speedY;
}

void keyPressed() {
  if (key == CODED)
  {
    if (keyCode == UP && y>=0) { //restrict to screen edge
      speedX=0; 
      speedY=-1;
    } else if (keyCode == DOWN && y<=500) {
      speedX=0; 
      speedY=1;
    } else if (keyCode == LEFT && x>=0) {
      speedX=-1; 
      speedY=0;
    } else if (keyCode == RIGHT && x<=500) {
      speedX=1; 
      speedY=0;
    }
  }
}
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