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POHow to rotate a 3D object on axis three.js?
 

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  1. POHow to rotate a 3D object on axis three.js?
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    <p>I have a great problem about the rotation in three.js I want to rotate my 3D cube in one of my game.</p> <pre><code>//init geometry = new THREE.CubeGeometry grid, grid, grid material = new THREE.MeshLambertMaterial {color:0xFFFFFF * Math.random(), shading:THREE.FlatShading, overdraw:true, transparent: true, opacity:0.8} for i in [1...@shape.length] othergeo = new THREE.Mesh new THREE.CubeGeometry(grid, grid, grid) othergeo.position.x = grid * @shape[i][0] othergeo.position.y = grid * @shape[i][1] THREE.GeometryUtils.merge geometry, othergeo @mesh = new THREE.Mesh geometry, material //rotate @mesh.rotation.y += y * Math.PI / 180 @mesh.rotation.x += x * Math.PI / 180 @mesh.rotation.z += z * Math.PI / 180 </code></pre> <p>and (x, y, z) may be (1, 0, 0)</p> <p>then the cube can rotate, but the problem is the cube rotate on its own axis,so after it has rotated, it can't rotate as expected.</p> <p>I find the page <a href="https://stackoverflow.com/questions/10747510/how-to-rotate-a-three-js-vector3-around-an-axis">How to rotate a Three.js Vector3 around an axis?</a>, but it just let a Vector3 point rotate around the world axis?</p> <p>and I have tried to use <strong>matrixRotationWorld</strong> as</p> <pre><code>@mesh.matrixRotationWorld.x += x * Math.PI / 180 @mesh.matrixRotationWorld.y += y * Math.PI / 180 @mesh.matrixRotationWorld.z += z * Math.PI / 180 </code></pre> <p>but it doesn't work, I don't whether I used it in a wrong way or there are other ways..</p> <p><strong>so, how to let the 3D cube rotate around the world's axis???</strong></p>
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