Path: chuka.playstation.co.uk!news
From: "Steve Dunn" <steve@backroom.tm>
Newsgroups: scee.yaroze.programming.3d_graphics
Subject: Re: 3D Object Size (Vertices section of PLY file)
Date: Sat, 28 Mar 1998 13:44:10 -0000
Organization: PlayStation Net Yaroze (SCEE)
Lines: 101
Message-ID: <6fo467$6ne11@chuka.playstation.co.uk>
References: <6f9emu$f1o27@chuka.playstation.co.uk> <6fnrcc$6ne6@chuka.playstation.co.uk> <351F7F4E.CD3FB3D4@hinge.mistral.co.uk>
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Thanks Craig

>
>Steve, the tmd member of a GsDOBJ2
structure points
>to the TMD objects header.
>
    Ahh, the wonderful magical unsigned
long !  Good job us hobbiest aren't at
all interested in fundamentals like this
! ;(  Would have been a complete waist
of paper if they did print any 'discrete
clues' as to what we're actually poking
around with ! ;)

Still, the diagram on how to use the
mains plug converter deserves some
praise ! ;)



Steve 'miffed' Dunn.

>
>
>Steve Dunn wrote:
>
>> Think I've got it sussed,
>>     To make a 'bounding collision
box',
>> I've decided the best course of
action
>> to get the object 'size' is
>> to poke around and come up with an
x,y,z
>> size from the Vertices section of the
>> ply file associated with the
particular
>> RSD file.
>> Though documentation sais the
'vertices'
>> section contains the X,Y,Z co-ords of
>> the vertices, one line for each
vertex.
>> I have found that this is in fact
>> incorrect.
>> The format I've stumbled across is..
X,
>> Z, Y.
>> Try it for yourself.  Create a
>> 200x200x50 cube,convert it,  and look
at
>> the vertices in the ply file.  It is
>> definitely X,Z,Y.
>>
>> Anyway, more to point, is there a way
to
>> get these dimensions from the
resulting
>> .tmd file ?
>>
>> Additionally, I should point out that
>> this is all in aid of collision
>> detection.  If anyone can  turn me
>> around and kick me in the direction
of a
>> nice sample with collision detection
I'd
>> be very happy indeed.
>>
>> Any help appreciated.
>>
>> Steve
>
>Steve, the tmd member of a GsDOBJ2
structure points
>to the TMD objects header.
>
>It's structure is something like:
>typedef struct {
>    SVECTOR *vertices; // pointer to an
array with n_verts
>                  //elements with the
vertex coords in it
>    long n_verts;
>    NORMAL *norms;
>    long n_norms;
>    PRIMITIVE *prims;
>    long n_prims;
>    long scale;
>} TMD_OBJECT;
>
>I may have got this in the wrong order
as I've not got my machine here,
>but
>that's the contents of the structure...
>
>Craig.
>