Three.js: Rotate at center of an object -


i've modified single spinning cube contain 3 cubes in object3d

http://jsfiddle.net/vswb9/1243/

in above example uses first cube. need rotate on single axis @ exact center of object.

the object3d code 

  geometry = new three.cubegeometry(50, 50, 50);     material = new three.meshnormalmaterial();     mesh = new three.object3d();     mesh1 = new three.mesh(geometry, material);     mesh1.position.x = 50;     mesh2 = new three.mesh(geometry, material);     mesh2.position.x = 100;     mesh3 = new three.mesh(geometry, material);      mesh.add(mesh1);     mesh.add(mesh2);     mesh.add(mesh3);      scene.add(mesh);

here rotation

  mesh.rotation.x += 0.01;   mesh.rotation.y += 0.02;

edit: example demonstrate problem, actual code object contains many different sized shapes.

you may define coordinates of center.

mesh.position.set( center.x, center.y, center.z ); mesh.geometry.applymatrix(new three.matrix4().maketranslation( -center.x, -center.y, -center.z ) );

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