//CYLINDER
var cyl_material = new THREE.MeshBasicMaterial({ color: 0xff0000 });
var cyl_width = 1;
var cyl_height = 5;
// THREE.CylinderGeometry(bottomRadius, topRadius, height, segmentsRadius,
segmentsHeight, openEnded)
var cylGeometry = new THREE.CylinderGeometry(cyl_width, cyl_width, cyl_height, 20, 1, false);
// translate the cylinder geometry so that the desired point within the
geometry is now at the origin
cylGeometry.applyMatrix(new THREE.Matrix4().makeTranslation(0, cyl_height/2, 0));
var cylinder = new THREE.Mesh(cylGeometry, cyl_material);
scene.add(cylinder);