Re: [android-developers] Re: [OpenGL] change coodinate system

Thanks, wow, it really was simple. Thanks for the sane answer.

Juan

On Wed, Apr 28, 2010 at 11:02 PM, Robert Green <rbgrn.net@gmail.com> wrote:

Juan, their sarcasm is well-founded.  It's not only possible but
trivial.

One easy way to change the coordinate system:

// start drawing
gl.glMatrixMode(GL10.GL_MODELVIEW);
gl.glLoadIdentity();
gl.glScalef (1, 1, -1);
GLU.gluLookAt(gl, pos.x, pos.y, pos.z, lookAt.x, lookAt.y, lookAt.z,
upVec.x, upVec.y, upVec.z);

Enjoy your new left-handed coordinate system.

On Apr 28, 7:39 pm, Bob Kerns <r...@acm.org> wrote:
> You mean, other than any affine transform that decomposes to include
> scaling of an odd number of axis by a negative value? Nope, other than
> that infinite number of ways, nope, no way.
>
> On Apr 27, 7:13 pm, Juan Aranda-Alvarez <juan.arandaalva...@gmail.com>
> wrote:
>
> > OpenGL works in 3D space, so if you would like another orientation you could
> > rotate the scene moving the POV (camera) position. But there is no way to
> > move from a right-hand coordinate system to a Left-side one.
>
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