how to convert a 2d path to a 3d shape in Three.js?
var shape = new THREE.Shape();
shape.moveTo(20,20);
shape.bezierCurveTo(20, 100, 150, 100, 150, 20);
shape.moveTo(20,20);
shape.lineTo(20, 100);
shape.lineTo(150, 100);
shape.lineTo(150, 20);

var shape3d = shape.extrude(extrudeSettings);
var shapePoints = shape.createPointsGeometry();
var shapeSpacedPoints = shape.createSpacedPointsGeometry();
var material = new THREE.MeshBasicMaterial({ color: 0x0000ff });
var shapeMesh = new THREE.Mesh(shape3d, material);

var shape = new THREE.Shape();
shape.moveTo(20,20);
shape.bezierCurveTo(20, 100, 150, 100, 150, 20);
shape.lineTo(150, 100);
shape.lineTo(20, 100);
shape.moveTo(20,20);