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Rotation of an aircraft
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Posts: 5


Tue, Feb 5 2013

Hi all,

We would like to rotate an aircraft with the accelerometer data. We think that we need to do this with a quaternion but we don't understand how to use it. It seems the aircraft mesh does a translation instead of a rotation when using rotateByAxis:angle:mode method of NGLQuaternion.

NGLQuaternion *quat = [[NGLQuaternion alloc] init];
[quat rotateByAxis:nglVec3Make(0, 0, 1) angle:RADIANS_TO_DEGREES(roll) mode:NGLAddModeSet];
[_aircraft rotateWithQuaternion:quat];

What is the best way to do this?

Thanks for your answers.
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Posts: 571


Wed, Feb 6 2013

In response to: @syfonseq


No please, don't do that. There are methods in NGLObject3D to make your development much easier.

The best you can do is to take a deep look and learn from the sample project "Panorama". It's within the NinevehGL and uses CoreMotion framework to rotate its scene. Seems you're looking for "deviceMotion" feature, which is not the exactly same thing as Accelerometer, actually it's just one type of information from Accelerometer, anyway... you'll find that information very useful.

You can find more information about the 3D rotation here:
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Posts: 5


Wed, Feb 13 2013

In response to: @dineybomfim

Thanks for your reply.

I have an other question. Can you give an approximate date for the next release of NinevehGL with the touch events included? It would be very useful

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