Re: Function set-gl-vertex-array in Guile-opengl

[Luis Souto Graña]

Andy Wingo doesn't use f32vectors, he uses packed-struct.scm https://
github.com/guildhall/guile-opengl/blob/master/gl/contrib/packed-struct.scm
. There are bytevector-ieee-single-native-set in it.

It works because I wrote:

$ cd /home/spectrumgomas/guile-opengl-01.0/examples/particle-system
$ guile client-arrays.scm

And I see the particle system.

Now I just need to understand it. :)

El sáb., 26 ene. 2019 a las 16:39, Daniel Llorens (<
address@hidden>) escribió:

>
>
> > On 26 Jan 2019, at 17:05, Luis Souto Graña <address@hidden>
> wrote:
> >
> > The structure of my byvector is:
> >
> > 30.0(float) --- IEE754 converter -->  0x41F00000 (hexadecimal) ---
> little endian ---> 0000F041 --- hexadecimal to decimal converter ---> 00 00
> 240 65
> >
> > But I didn't notice and there's a lot of zeros before the next 00 00 240
> 65.
> >
> > I have to study what is the structure of a f32vector in Guile. I don't
> know it.
>
> The storage of an f32vector is exactly the same as if you declared float
> a[n] in C, one float after another, each taking 4 bytes. Endianness doesn't
> matter if you are producing and consuming the floats on the same machine.
>
> The source data is floats, OpenGL takes floats, you don't need to deal
> with bytes.
>
>