nature/11-three-processing.html at master · dlobser/nature · GitHub

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<!DOCTYPE HTML>
<html>
	<head>

		<script src="js/libs/processing.js"></script>
		<script src="js/three/build/three.js"></script>
		<style>

			body{
				background-color:black;
				color:grey;
				text-align:center;
				font-size:16;
				font-family:sans-serif;
			}

			#move {
			   text-align:center;
			}

			canvas {
			   display: inline;
			}

		</style>
	</head>

<body>

	<p>

	This script combines threejs and processingjs - click to randomize

	</p>

	<div id="move">
		<canvas id="processing-canvas"> </canvas>
	</div>

	<p style="color:#333">
		<strong>you:</strong> what the?<br>
		<strong>me:</strong> This script runs a processing sketch that fills an array <br>
		with the positions of elements. This is then read and rendered by threejs <br>
		<strong>you:</strong> why are the physics so bad?<br>
		<strong>me:</strong> Sorry! This is an older processing sketch, I thought it would work well as a demo even if it is a little hinky<br>
	</p>

</body>

<script>

	//declaring variables to share between three and pjs
	var pVar = [];
	var mouser = {x:0,y:0};

</script>

<script type="text/processing" data-processing-target="processing-canvas">

Ball myball;
int numBalls = 30;
Ball[] myballs = new Ball[numBalls];


void setup() {


  size(500, 500);
  myball = new Ball(width/2, height/2, 20);
  for (int i = 0; i<myballs.length; i++) {
    myballs[i] = new Ball(random(width), random(height), 50, i, myballs);
  }

}

void draw() {

mouser.x = mouseX;
mouser.y = mouseY;

  if(mousePressed == true){
	  for (int i = 0; i<myballs.length; i++) {
		myballs[i] = new Ball(random(width), random(height), 50, i, myballs);
	  }
  }

  background(0);
  smooth(4);

fill(255,200,50);
ellipse(mouseX,mouseY,50,50);

  for (int i = 0; i<myballs.length; i++) {
    myballs[i].display();
    myballs[i].move(mouseX, mouseY);
    myballs[i].collide();
  }
  //this lets us share with three
  pVar = myballs;

}

class Ball {

  float tx;
  float ty;
  float rad, origtx, origty;
  Ball[] others;
  int id;

  Ball(float mytx, float myty, float myrad) {
    tx = mytx;
    ty = myty;
    origtx = mytx;
    origty = myty;
    rad = myrad;
  }

  Ball(float mytx, float myty, float myrad, int myid, Ball[] myball) {

    tx = mytx;
    ty = myty;
    origtx = mytx;
    origty = myty;
    rad = myrad;
    id = myid;
    others = myball;
  }

  void display() {
   fill(255);
   ellipse(tx,ty,rad,rad);
  }

  void move(float movetx, float movety) {
    float thisx = movetx;
    float thisy = movety;

    float mox = tx-thisx;
    float moy = ty-thisy;

    if (dist(tx, ty, thisx, thisy)<120) {
		tx+=mox/dist(tx, ty, thisx, thisy);
		ty+=moy/dist(tx, ty, thisx, thisy);
    }
	if(dist(tx, ty, thisx, thisy)<50){
		tx+=mox/5;
		ty+=moy/5;
    }

  }

  void collide() {
    for (int i = id+1;i<numBalls;i++) {
      float thisx = others[i].tx -tx;
      float thisy = others[i].ty - ty;

      float distance = sqrt (thisx*thisx + thisy*thisy);

      float minDist = others[i].rad/2+rad/2+15;

      float angle = atan2(thisy, thisx);

      float targetX = tx + cos(angle)*minDist;
      float targetY = ty + sin(angle)*minDist;

      float ax = (targetX - others[i].tx)*.21;
      float ay = (targetY - others[i].ty)*.21;

      if (distance < minDist) {
        tx-=ax;
        ty-=ay;
      }
    }
  }
}

</script>

<script>
//THREE script

var balls = [];
var done = false;

var container = document.getElementById("move");
console.log(container);

var renderer = new THREE.WebGLRenderer({antialias:true});
renderer.setSize( 500, 500 );

container.appendChild(renderer.domElement);

var scene = new THREE.Scene();

var camera = new THREE.OrthographicCamera( 0,500,0,500,0,1000);

//actual position doesn't matter - just the resulting vector
camera.position.set( 0, 0,10 );
camera.lookAt( scene.position );

var geometry = new THREE.SphereGeometry( 25, 12, 12 );

/* this makes reflective balls - sadly it was looking strange - maybe because of the orthographic cam
	var path = "textures/bmap.";
		var format = '.jpg';
		var urls = [
			path + '04' + format, path + '02' + format,
			path + '05' + format, path + '06' + format,
			path + '01' + format, path + '03' + format
		];

		var textureCube = THREE.ImageUtils.loadTextureCube( urls );
		var material = new THREE.MeshBasicMaterial( { color: 0xffffff, envMap: textureCube } );
*/

var material = new THREE.MeshLambertMaterial( { color: 0xFFffff } );
var mesh = new THREE.Mesh( geometry, material );

mesh.updateMatrix();
mesh.matrixAutoUpdate = true;

var light = new THREE.DirectionalLight( 0xFFFFff );
light.position.set( 1, -1, 1 );
scene.add( light );

var light = new THREE.DirectionalLight( 0x555555 );
light.position.set( 0, 0, -1 );
scene.add( light );

var light = new THREE.DirectionalLight( 0xFFFFff );
light.position.set( -1, 1, 1 );
scene.add( light );


function addBalls(){
	for(var i = 0 ; i < pVar.length+1 ; i++){

		var mesh = new THREE.Mesh( geometry, material );

		mesh.updateMatrix();
		mesh.matrixAutoUpdate = true;

		balls.push(mesh);
		scene.add(mesh);

	}
}

draw();

function draw(){

	renderer.render( scene, camera );

	//pVar begins it's life being empty - I assume that means three is rendered before pjs
	//in any case I need to tell it to wait until pVar has some values before creating all the ball geo

	if(pVar[0]!=undefined){
		if(pVar.length == 30 && done==false){
			addBalls();
			done = true;
		}

		for(var i = 0 ; i < pVar.length ; i++){
			balls[i].position.x = pVar[i].tx;
			balls[i].position.y = pVar[i].ty;
		}
		balls[30].position.x = mouser.x;
		balls[30].position.y = mouser.y;
	}
	requestAnimationFrame( draw );
}

</script>


</html>