Hartha Posted April 18, 2017 Share Posted April 18, 2017 Hi, In Threejs, you can calculate the rotation between two unit vectors like this var quaternion = new THREE.Quaternion().setFromUnitVectors( v1, v2 ); var matrix = new THREE.Matrix4().makeRotationFromQuaternion( quaternion ); how can i do this in babylonjs ? Quote Link to comment Share on other sites More sharing options...
JohnK Posted April 19, 2017 Share Posted April 19, 2017 Sorry it is taken so long to get a reply. Hopefully, if I have understood what setFromUnitVectors does, the following does the equivalent where v1 and v2 are unit vectors var angle = Math.acos(BABYLON.Vector3.Dot(v1, v2)); var axis = BABYLON.Vector3.Cross(v1,v2); var quaternion = BABYLON.Quaternion.RotationAxis(axis, angle); var matrix = BABYLON.Matrix.Identity(); BABYLON.Matrix.FromQuaternionToRef(quaternion, matrix); As you have not given the context for use I have not tested the above. Hartha and GameMonetize 2 Quote Link to comment Share on other sites More sharing options...
Hartha Posted April 19, 2017 Author Share Posted April 19, 2017 @JohnK I'm getting a great help from you and the others in this forms, Thank you Quote Link to comment Share on other sites More sharing options...
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