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# inprazia

Member Since 02 Oct 2010
Offline Last Active Oct 29 2012 08:26 AM

### In Topic: OpenAL Sound Error C++

13 April 2012 - 10:37 AM

I'm not using the ALUT lib, just basic OpenAL. Didn't have any problems. Just follow the samples included in the OpenAL SDK.

### In Topic: Defining car speed relative to rear wheels rotation

16 December 2011 - 11:01 AM

Guys, that ain't rocket science after all. If you have 0 slip, then the linear velocity of the point of the wheel touching the ground is zero, and that's enough to work out a kinetic model.

### In Topic: Gauss-Jordan Problems

16 December 2011 - 08:17 AM

At first glance it seems that you should eliminate that peace of code: int maxrow = y + 1;

### In Topic: Accurately measuring relative distance between a set of fiducials (Augmented...

07 December 2011 - 07:37 AM

Well, given the fact that you don't know the uncertainty in the input data, the optimal approach would be to apply some kind of least squares fitting. Try to obtain Y equations for your X markers, where Y >= X, describing the transformations you are talking about. Resolve the obtained system of equations by optimizing the least square error iteratively using the Gauss-Newton algorithm. And don't forget to have fun.

### In Topic: Vector rotation to Euler angles

23 November 2011 - 07:20 AM

It's simple. The atan2f function considers the signs of its two arguments, thus yielding the correct result. By using the atanf function, you loose the sign information.

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