UPDATED: SOLUTION FOUND
I am in need of guidance on how to create animation for the movement of points along a curve to simulate string motion in 3D while keeping performance in mind.
Imagine multiple strings between two points, for example.
Check out this Fiddle for the code. (code updated)
- I have a curveObject and I'm attempting to update the position of point1. (code updated)
var camera, scene, renderer;
var angle1 = angle2 = 0;
var curve1, point1, curveObject, geometryCurve, materialCurve;
var params1 = {P0x: 0, P0y: 0,
P1x: 2, P1y: 2,
P2x: -2, P2y: 1,
P3x: 0, P3y: 3,
steps: 30};
scene = new THREE.Scene();
camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 1, 10000);
camera.position.z = 10;
scene.add(camera);
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setClearColor( 0x16112b, 1 );
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);
createBezierCurveNEW = function (cpList, steps) {
var N = Math.round(steps)+1 || 20;
var geometry = new THREE.Geometry();
var curve = new THREE.CubicBezierCurve3();
var cp = cpList[0];
curve.v0 = new THREE.Vector3(cp[0], cp[1], cp[2]);
cp = cpList[1];
curve.v1 = new THREE.Vector3(cp[0], cp[1], cp[2]);
cp = cpList[2];
curve.v2 = new THREE.Vector3(cp[0], cp[1], cp[2]);
cp = cpList[3];
curve.v3 = new THREE.Vector3(cp[0], cp[1], cp[2]);
var j, stepSize = 1/(N-1);
for (j = 0; j < N; j++) {
geometry.vertices.push( curve.getPoint(j * stepSize) );
}
return geometry;
};
function CreateCurve(){
scene.remove(curve1);
var controlPoints1 = [
[params1.P0x, params1.P0y, 0],
[params1.P1x, params1.P1y, 0],
[params1.P2x, params1.P2y, 0],
[params1.P3x, params1.P3y, 0] ];
var curveGeom1 = createBezierCurveNEW(controlPoints1, params1.steps);
var mat = new THREE.LineBasicMaterial( { color: 0x000000, linewidth: 5 } );
curve1 = new THREE.Line( curveGeom1, mat );
scene.add(curve1);
};
CreateCurve();
function animate() {
CreateCurve();
render();
angle1 -= .007;
angle2 += .003;
params1.P1x = Math.cos(angle1)+2;
params1.P1y = Math.sin(angle1)+3;
params1.P2x = -Math.cos(angle2)-2;
params1.P2y = Math.cos(angle2)+1;
requestAnimationFrame(animate);
};
animate();
function render() {
renderer.render(scene, camera);
};<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r83/three.min.js"></script>The ultimate objective is to smoothly animate a slow sine-like movement of the curve, similar to moving control points of a bezier curve in Photoshop.
(The goal has been achieved, although not by my own work. I came across some helpful code from this source, so a big thank you to those individuals.)
There is limited information available on curve animation in Three.js.
Perhaps someone has already made progress on something similar.