"Cannonball" - Processing

ID	Autor	Duplicat din	Ultima modificare
`#4517`	Takacs Robert (RoTak)	-	Duminica, 19 sep 2021, 15:15

class vec2d
{
  constructor(x, y)
  {
   this.x = x;
   this.y = y;
  }
}

let p0 = new vec2d(0, 200);
let v0 = 20;
let a0 = new vec2d(0, 0.98);
let p = new vec2d(0,0);
let v = new vec2d(0, 0);
let a = new vec2d(0, 0);
let t = 0;
let theta = 45;
let ptsX = [];
let ptsY = [];
function drawBall(p)
{
  push();
  fill(0);
  stroke(0);
  
  circle(p.x, 400 - p.y, 10, 10);
  pop();
  
}
function setup() {
  createCanvas(400, 400);
  angleMode(DEGREES);
  
  
  for(let t = 0; t <= 75; ++t)
  {
   ptsX.push(p0.x + v0 * cos(theta) * t);
   ptsY.push(p0.y + v0 * sin(theta) * t - 0.5 * a0.y * t * t);
  }
}


function draw() {
  t = map(mouseX, 0, 400, 0, 40);
  
  p.x = p0.x + v0 * cos(theta) * t;
  p.y = p0.y + v0 * sin(theta) * t - 0.5 * a0.y * t * t;
  
  background(100);
  for(let i = 0; i < 75; ++i)
  {
   push();
   strokeWeight(1);
   stroke(255);
   line(ptsX[i], 400-ptsY[i], ptsX[i+1], 400-ptsY[i+1]);
   pop();
  }
  drawBall(p);
}