trail init.js

    var trailMesh = BABYLON.MeshBuilder.CreateGround("trail", {width: 0.1, height: 0.010, subdivisionsY:256}, scene);
    trailMesh.setBoundingInfo(new BABYLON.BoundingInfo(new BABYLON.Vector3(-1000,-1000,-1000), new BABYLON.Vector3(1000,1000,1000)));
    trailMaterial.backFaceCulling = true;
    trailMesh.material = trailMaterial;
    var trackSampler0Block = trailMaterial.getBlockByPredicate((b) => b.name === "tailSampler0");
    var trackSampler1Block = trailMaterial.getBlockByPredicate((b) => b.name === "tailSampler1");
    
    var data = new Array(trailLength * 4);
    for (let i = 0; i < trailLength; i++)
    {
        var newPos = posFunction((-255.5 + i) * timeStep + 10)
        data[i*4] = newPos.x;
        data[i*4+1] = newPos.y;
        data[i*4+2] = newPos.z;
        data[i*4+3] = 0;
    }