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From: Daniel Llorens <daniel.llorens@bluewin.ch>
To: "Luis Souto Graña" <luissoutobueu@gmail.com>
Cc: guile-user <guile-user@gnu.org>
Subject: Re: Function set-gl-vertex-array in Guile-opengl
Date: Sat, 26 Jan 2019 16:39:36 +0100	[thread overview]
Message-ID: <0BE53CE6-E3F3-4D2B-AB56-DAEE9A87F114@bluewin.ch> (raw)
In-Reply-To: <CA+0Zd=_U5XFH4Yx0B69Ra=McNpNwh-2g8BKvXGOgLUr2X3QF3A@mail.gmail.com>



> On 26 Jan 2019, at 17:05, Luis Souto Graña <luissoutobueu@gmail.com> 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.




  reply	other threads:[~2019-01-26 15:39 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <mailman.136.1548435627.3559.guile-user@gnu.org>
2019-01-25 18:25 ` Function set-gl-vertex-array in Guile-opengl Daniel Llorens
2019-01-26  1:33   ` Luis Souto Graña
2019-01-26 12:52     ` Daniel Llorens
2019-01-26 12:58       ` Daniel Llorens
2019-01-26 16:05         ` Luis Souto Graña
2019-01-26 15:39           ` Daniel Llorens [this message]
2019-01-26 19:00             ` Luis Souto Graña
2019-01-28 13:30             ` Luis Souto Graña
2019-01-31 11:14               ` Luis Souto Graña
2019-02-09 18:59                 ` Luis Souto Graña
2019-01-25 10:36 Luis Souto Graña
2019-01-26 10:33 ` Catonano
2019-01-26 16:02   ` Luis Souto Graña

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