In an attempt to create a unique effect, I am exploring the idea of spawning a series of objects on a setInterval and assigning each object a customized animation on a path using requestAnimationFrame. I have successfully added one object and animated it along a path with the following code:
var psGeometry = new THREE.PlaneGeometry(3,2,10,1);
var psPlane = new THREE.Mesh(psGeometry, new THREE.MeshBasicMaterial({color:0x0000ff}));
scene.add(psPlane);
function animatePaper(obj = psPlane, offset= 0.007)
{
if(counter <=( 1-obj.geometry.vertices.length/2 *offset))
{
for (var i=0; i < obj.geometry.vertices.length/2; i++)
{
obj.geometry.vertices[i].y = curvePath.getPoint(counter + i * offset).y;
obj.geometry.vertices[i].z = -0.5;
obj.geometry.vertices[i + obj.geometry.vertices.length/2].y = curvePath.getPoint(counter + i * offset).y;
obj.geometry.vertices[i + obj.geometry.vertices.length/2].z = -2.5;
obj.geometry.vertices[i].x = curvePath.getPoint(counter + i * offset).x;
obj.geometry.vertices[i + obj.geometry.vertices.length/2].x = curvePath.getPoint(counter + i * offset).x;
}
obj.geometry.verticesNeedUpdate = true;
counter += 0.005;
}
else{
console.log("Removing...");
scene.remove(obj);
}
}
function animate() {
requestAnimationFrame(animate);
animatePaper(psPlane, 0.007);
render();
}
View the example here: jsfiddle.net.
While this animates the object along the curvePath, I thought it would be possible to spawn these objects at intervals and apply the same code. Unfortunately, this was not the case.
My attempts: I tried creating a function to spawn objects and apply the code:
setInterval(drawSheets, 1000);
function drawSheets()
{
var psGeometry = new THREE.PlaneGeometry(3,2,10,1);
var psPlane = new THREE.Mesh(psGeometry, new THREE.MeshBasicMaterial({color:0x0000ff}));
scene.add(psPlane);
setInterval(function(){animatePaper(psPlane, 0.007);}, 30);
}
I also attempted the method suggested in this answer:
setInterval(objArray.forEach(function(obj){setInterval(function(){animatePaper(obj);},300);}), 3000);
Expected outcome: To spawn multiple objects at intervals and independently animate each one along a curve.
I am looking for assistance on this matter. Thank you!
Version: Three.js r82
** EDIT: ** After conducting another test (jsfiddle), I discovered that using setInterval on a function results in shared variables, speeding up the animation. I am seeking advice on how to localize these variables to each object.