three.js - how do I rotate a cylinder around a specific point?

Question

I\'ve referred following questions for object rotation.

• link 1 link 2 link 3 link 4 link 5

But could not understand exactly how do I rotate a cy

Answer 1

To give a code example for the above answer of WestLangley:

// 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 );    

Now the rotation works around the cylinder origin:

cylinder.rotation.x = 0.5*Math.PI;

Hope that helps.