var curve = new THREE.QuadraticBezierCurve3( new THREE.Vector3( -10, 0, 0 ), new THREE.Vector3( 20, 15, 0 ), new THREE.Vector3( 10, 0, 0 ) ); var geometry = new THREE.Geometry(); geometry.vertices = curve.getPoints( 50 ); var material = new THREE.LineBasicMaterial( { color : 0xff0000 } ); // Create the final Object3d to add to the scene var curveObject = new THREE.Line( geometry, material );