JSFiddle - React, Tailwind, and code Playground

by wolfgangabersdorf

HTML

<script src="https://threejs.org/build/three.js"></script>
<script src="https://threejs.org/examples/js/controls/OrbitControls.js"></script>

CSS

body {
  margin: 0;
}

JavaScript

var camera, scene, renderer;
var geometry, material, mesh;
var dotMaterial;
var dotGeometry;
var points=[];
var objects=[];
var drag=false;
var selpointsids=[];
var pointseffect=[];

var oldPos;
var newPos;


var startX,startY,dragX,dragY;

var controls;
function init() {

    camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 0.01, 10 );
    camera.position.z = 1;

    scene = new THREE.Scene();

    geometry = new THREE.PlaneBufferGeometry( 1, 1, 250, 250 );
		dotMaterial = new THREE.PointsMaterial( { size: 1, sizeAttenuation: false } );
		// modify geometry
		dotGeometry = new THREE.Geometry();
		
		var positionAttribute = geometry.attributes.position;
		console.log( positionAttribute.count );
		
		for ( var i = 0; i < positionAttribute.count; i ++ ) {
		
			// access single vertex (x,y,z)
		
			var x = positionAttribute.getX( i );
			var y = positionAttribute.getY( i );
			var z = positionAttribute.getZ( i );
			
			// modify data (in this case just the z coordinate)
		
			if(x>-0.3 && x<0.3 && y>-0.2 && y<0.3)
			{
				//z += Math.random() * 0.1;
				
				
			}
			// write data back to attribute
			positionAttribute.setXYZ( i, x, y, z );
			
			addPoint(x,y,z);
			
			
		}
		var dot = new THREE.Points( dotGeometry, dotMaterial );
		scene.add(dot);
		//points.push(dotGeometry);
		//
		
    //material = new THREE.MeshNormalMaterial();

    mesh = new THREE.Mesh( geometry, material );
    scene.add( mesh );
		objects.push(mesh);
    renderer = new THREE.WebGLRenderer( { antialias: true } );
    renderer.setSize( window.innerWidth, window.innerHeight );
    document.body.appendChild( renderer.domElement );
		
	controls = new THREE.OrbitControls( camera, renderer.domElement );
	controls.rotateSpeed=0;
}

function addPoint(x,y,z)
{
		//console.log("point coord",x,y,z);
	dotGeometry.vertices.push(new THREE.Vector3( x, y, z));
	points.push(new THREE.Vector3( x, y, z));
}

function onKeyPress( event )...