[openvrml-develop] Navigation Patch

[<luc...@li...>]

Substituting the implementation of rot in ViewerOpengl.cpp with the 
following one:

///////////////////////////////////////////////////////////////////////
void
ViewerOpenGL::rot(float x, float y, float z, float a)
{

float rot_quat[4];
	float vec[3];
	
	
	vec[0]=3Dx;
	vec[1]=3Dy;
	vec[2]=3Dz;

	// normalizing vector

	int i;
    float module;

    module =3D (vec[0]*vec[0] + vec[1]*vec[1]+vec[2]*vec[2] );
	module=3Dsqrt(module);
    for (i =3D 0; i < 3; i++) vec[i] /=3D module;

	// computing quaternion
	
	float q=3Dsin(a*0.01/2);
	rot_quat[0]=3D vec[0]*q;
	rot_quat[1]=3D vec[1]*q;
	rot_quat[2]=3D vec[2]*q;
	rot_quat[3]=3Dcos(a*0.01/2);

	add_quats(rot_quat,d_curquat,d_curquat);

	d_rotationChanged=3Dtrue;

	wsPostRedraw();

}
//////////////////////////////////////////////////////////////////////


will solve issue number 1. as described in the bug report regarding 
Navigation submitted by Greg Roelofs.
I can work to improve the navigation interface.
It would be useful if i can get in touch with Greg or with someone else 
to discuss possible improvements.

Luca