I could actually implement the rotation of the car using arduino's potentiometer (like a steering). But the issue is when I rotate the car with potentiometer, it doesn't drive in that direction, but instead drives in mouseX mouseY direction.
I feel this is one of the lines that's causing the issue.
PVector vel = PVector.sub(new PVector(mouseX, mouseY), pos);
So, what do I need to change in the code to make it work?
Full code here:
import processing.serial.*;
Serial myPort; // serial port
PImage carImage;
PImage background;
PVector backgroundPos;
Car car;
boolean move = false;
float speed;
/* STEERING */
float mapval;
int val;
void setup() {
imageMode(CENTER);
size(1200, 675);
carImage = loadImage("car.png");
background = loadImage("https://www.clipartkey.com/mpngs/m/33-331548_clip-art-oval-oval-race-track-clipart.png");
int size = 3;
background.resize(background.width*size, background.height*size);
car = new Car(width/2, height/2);
backgroundPos = new PVector(background.width/2, background.height/2);
myPort = new Serial(this, Serial.list()[0], 9600);
myPort.bufferUntil('\n');
}
void draw() {
background(0);
pushMatrix();
//scale(2.0);
translate(backgroundPos.x, backgroundPos.y);
image(background, 0, 0);
popMatrix();
car.show();
car.update();
}
void moveBackground(PVector vel) {
vel.x = -vel.x;
vel.y = -vel.y;
backgroundPos.add(vel);
}
float angle;
class Car {
//PImage carImage;
PVector pos;
//float angle;
//float speed;
Car(float x, float y) {
//carImage = loadImage("car.png");
//link to the Picture: https://toppng.com/uploads/preview/aston-martin-one77-01-top-down-car-sprite-1156302814774vtgthfmb.png
carImage.resize(0, 100);
pos = new PVector(x, y);
angle = 0;
speed = 20;
}
void show() {
pushMatrix();
translate(pos.x, pos.y);
rotate(angle);
image(carImage, 0, 0);
popMatrix();
}
void update() {
updateAngle();
//Just try both and decide which one you like more
//updateMovementFirstExample();
updateMovementSecondExample();
}
void updateAngle() {
PVector vel = PVector.sub(new PVector(mouseX, mouseY), pos);
angle = atan2(vel.y, vel.x) + PI / 2;
}
void updateMovementFirstExample() {
if (!keyPressed) return;
if (key != 'w' && key != 'W') return;
PVector vel = PVector.sub(new PVector(mouseX, mouseY), pos);
if (vel.mag() < speed) return;
//You could do it like this:
vel.normalize();
vel.mult(speed);
pos.add(vel);
float distToMid = dist(pos.x, pos.y, width/2, height/2);
if (distToMid > min(width, height)/15) {
pos.sub(vel);
moveBackground(vel);
}
}
void updateMovementSecondExample() {
if (move==false) return;
//if (key != 'w' && key != 'W') return;
PVector vel = PVector.sub(new PVector(mouseX, mouseY), pos);
if (vel.mag() < speed) return;
vel.normalize();
vel.mult(speed);
moveBackground(vel);
}
}
// to read potentiometer values
void serialEvent(Serial myPort) {
if (myPort.available() > 0) {
val = myPort.read();
mapval = map(val,0,255,0,6.5);
angle = mapval; // rotate the car
}
