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    <p>You might need to clarify further regarding the following: <em>"it didn't rotate as I expected"</em></p> <p>OpenGL ES (and ergo, cocos3D) uses the y-axis as up so the rotation order is still x-y-z. If you are importing a model, you then need to take into account the 3D editor's co-ordinate system and adapt accordingly.</p> <p>If you are not used to working with three-dimensional representations, the leap from 2D to 3D can be a significant hurdle. Within Cocos3D:</p> <ul> <li>the x-axis is positive on the right and negative on the left</li> <li>the y-axis is positive upwards and negative downwards</li> <li>the z-axis is positive moving towards you and negative moving away from you</li> </ul> <p>Envisage those three lines of axis, or even better, a piece of string.</p> <p>If you are rotating around the x-axis, hold the string horizontally from left to right: the object would rotating towards you or away from you.</p> <p>If you are rotating around the y-axis, hold the string vertically from feet to head: the object would rotate as if like a revolving door.</p> <p>If you are rotating around the z-axis, hold one end close to your chest and the other end as far away as possible: the object would rotate similar to a clock face.</p> <p>-- Update</p> <p>I heavily wouldn't recommend changing the rotation order as it is the OpenGL standard to use Y-X-Z. If you wish to modify it, take a look at CC3GLMatrixMath and look for <strong><em>kmMat4RotationYXZ</em></strong> - there is also <strong><em>kmMat4RotationZYX</em></strong>. If you want to have X-Y-Z, you would need to construct your own rotation matrix and update accordingly in CC3GLMatrix and CC3GLMatrixMath.</p> <p>As a reference, you also have the <a href="http://fly.cc.fer.hr/~unreal/theredbook/chapter03.html" rel="nofollow">OpenGL Red book</a> - it should have some suggestions for you.</p>
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    1. POHow to change the rotation order in cocos3d
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    1. USStephen Morris
    1. USStephen Morris
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    1. COThanks a lot.In the document of CC3Node-property-rotation,it said "Rotation is performed in Y-X-Z order, which is the OpenGL default".So I hope to know ,is there a way to change the order,to performed in x-y-z order?
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    2. COUpdated answer to include details regarding CC3GLMatrix and CC3MatrixMath.
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      1. USStephen Morris
    3. COI am not asking you to create new tags. Look within cocos3d and find cc3glmatrix / cc3matrixmath
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