Path: chuka.playstation.co.uk!news
From: "Matthew Hardingham" <MatthewHardingham@RebelWareInteractive.Freeserve.co.uk>
Newsgroups: scee.yaroze.programming.3d_graphics
Subject: Re: Elevation data
Date: Thu, 9 Dec 1999 21:31:37 -0000
Organization: PlayStation Net Yaroze (SCEE)
Lines: 99
Message-ID: <82p7ct$7rp2@chuka.playstation.co.uk>
References: <82luhc$6qr1@chuka.playstation.co.uk> <384eda83.10073394@news.playstation.co.uk>
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Cheers for that but for some reason it's now working !
odd that I still don't know what caused it.

Matt

Steven Osman <sosman@terratron.com> wrote in message
news:384eda83.10073394@news.playstation.co.uk...
> You're performing 16384 memory allocations, I wonder if that has
> anything to do with it.  Maybe the compiler's memory manager isn't the
> most efficient.
>
> I also wouldn't be surprised if your printf is the problem (did you
> put that in afterwards?)  You are printing out 16384 lines also!
>
> An extremely trivial point (incidentally)... This line:
>
> NewVert->Next = NULL;
>
> is redundant
>
>
> Steven
>
>
> On Wed, 8 Dec 1999 15:40:58 -0000, "Matthew Hardingham"
> <MatthewHardingham@RebelWareInteractive.Freeserve.co.uk> wrote:
>
> >Right here we go then,
> >
> >At the moment I have a set of elevation points stored in an array
(128x128)
> >from this I'm creating a link list of vertices.
> >For some reason it is running very slow or the program is crashing out.
> >Why ?
> >It's bugging me me now.
> >
> >Here's the vertex structure --
> >
> >    /* Vertex list */
> >    typedef struct Vertex {
> >        unsigned short IdxX, IdxZ;
> >        VECTOR Vert;                  /* Vector */
> >        struct Vertex *Next;
> >    } VERTEX;
> >
> >
> >Heres a snippet of code where the elevation data is extracted from the
> >array --
> >
> >    /* Loop through the mesh */
> >    for(MeshZ=0; MeshZ<MESH_SIZE; MeshZ++)
> >    {
> >        for(MeshX=0; MeshX<MESH_SIZE; MeshX++)
> >        {
> >            NewVert = AllocateVertex();
> >
> >            NewVert->IdxX = BlockX;
> >            NewVert->IdxZ = BlockZ;
> >
> >            printf("\n Z - %ld X - %ld", MeshZ, MeshX);
> >
> >            /* Set vertices values */
> >            NewVert->Vert.vx = (MeshX*MESH_INTERVAL);
> >            NewVert->Vert.vy = HeightArray[MeshZ][MeshX];
> >            NewVert->Vert.vz = (MeshZ*MESH_INTERVAL);
> >
> >            /* Change the pointers and link list positions */
> >            CurrentVert->Next = NewVert;
> >            NewVert->Next = NULL;
> >            CurrentVert = NewVert;
> >         }
> >    }
> >
> >Here's the allocation part ---
> >
> >    /* Vertex memory allocation */
> >    VERTEX *AllocateVertex(void)
> >    {
> >        VERTEX *V = NULL;
> >
> >        V = (VERTEX *)malloc(sizeof(VERTEX));
> >
> >        V->IdxX = 0; V->IdxZ = 0;
> >
> >        /* Vertice values */
> >        V->Vert.vx = 0; V->Vert.vy = 0; V->Vert.vz = 0;
> >
> >        V->Next = NULL;
> >
> >        return(V);
> >    }
> >
> >
> >
> >
> >
>