+++ /dev/null
-/*
-Copyright (C) 1999-2006 Id Software, Inc. and contributors.
-For a list of contributors, see the accompanying CONTRIBUTORS file.
-
-This file is part of GtkRadiant.
-
-GtkRadiant is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-GtkRadiant is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GtkRadiant; if not, write to the Free Software
-Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-*/
-//
-// l3dslib.c: library for loading triangles from an Alias triangle file
-//
-
-#include <stdio.h>
-#include "cmdlib.h"
-#include "inout.h"
-#include "mathlib.h"
-#include "trilib.h"
-#include "l3dslib.h"
-
-#define MAIN3DS 0x4D4D
-#define EDIT3DS 0x3D3D // this is the start of the editor config
-#define EDIT_OBJECT 0x4000
-#define OBJ_TRIMESH 0x4100
-#define TRI_VERTEXL 0x4110
-#define TRI_FACEL1 0x4120
-
-#define MAXVERTS 2000
-
-typedef struct {
- int v[4];
-} tri;
-
-float fverts[MAXVERTS][3];
-tri tris[MAXTRIANGLES];
-
-int bytesread, level, numtris, totaltris;
-int vertsfound, trisfound;
-
-triangle_t *ptri;
-
-
-// Alias stores triangles as 3 explicit vertices in .tri files, so even though we
-// start out with a vertex pool and vertex indices for triangles, we have to convert
-// to raw, explicit triangles
-void StoreAliasTriangles (void)
-{
- int i, j, k;
-
- if ((totaltris + numtris) > MAXTRIANGLES)
- Error ("Error: Too many triangles");
-
- for (i=0; i<numtris ; i++)
- {
- for (j=0 ; j<3 ; j++)
- {
- for (k=0 ; k<3 ; k++)
- {
- ptri[i+totaltris].verts[j][k] = fverts[tris[i].v[j]][k];
- }
- }
- }
-
- totaltris += numtris;
- numtris = 0;
- vertsfound = 0;
- trisfound = 0;
-}
-
-
-int ParseVertexL (FILE *input)
-{
- int i, j, startbytesread, numverts;
- unsigned short tshort;
-
- if (vertsfound)
- Error ("Error: Multiple vertex chunks");
-
- vertsfound = 1;
- startbytesread = bytesread;
-
- if (feof(input))
- Error ("Error: unexpected end of file");
-
- fread(&tshort, sizeof(tshort), 1, input);
- bytesread += sizeof(tshort);
- numverts = (int)tshort;
-
- if (numverts > MAXVERTS)
- Error ("Error: Too many vertices");
-
- for (i=0 ; i<numverts ; i++)
- {
- for (j=0 ; j<3 ; j++)
- {
- if (feof(input))
- Error ("Error: unexpected end of file");
-
- fread(&fverts[i][j], sizeof(float), 1, input);
- bytesread += sizeof(float);
- }
- }
-
- if (vertsfound && trisfound)
- StoreAliasTriangles ();
-
- return bytesread - startbytesread;
-}
-
-
-int ParseFaceL1 (FILE *input)
-{
-
- int i, j, startbytesread;
- unsigned short tshort;
-
- if (trisfound)
- Error ("Error: Multiple face chunks");
-
- trisfound = 1;
- startbytesread = bytesread;
-
- if (feof(input))
- Error ("Error: unexpected end of file");
-
- fread(&tshort, sizeof(tshort), 1, input);
- bytesread += sizeof(tshort);
- numtris = (int)tshort;
-
- if (numtris > MAXTRIANGLES)
- Error ("Error: Too many triangles");
-
- for (i=0 ; i<numtris ; i++)
- {
- for (j=0 ; j<4 ; j++)
- {
- if (feof(input))
- Error ("Error: unexpected end of file");
-
- fread(&tshort, sizeof(tshort), 1, input);
- bytesread += sizeof(tshort);
- tris[i].v[j] = (int)tshort;
- }
- }
-
- if (vertsfound && trisfound)
- StoreAliasTriangles ();
-
- return bytesread - startbytesread;
-}
-
-
-int ParseChunk (FILE *input)
-{
-#define BLOCK_SIZE 4096
- char temp[BLOCK_SIZE];
- unsigned short type;
- int i, length, w, t, retval;
-
- level++;
- retval = 0;
-
-// chunk type
- if (feof(input))
- Error ("Error: unexpected end of file");
-
- fread(&type, sizeof(type), 1, input);
- bytesread += sizeof(type);
-
-// chunk length
- if (feof(input))
- Error ("Error: unexpected end of file");
-
- fread (&length, sizeof(length), 1, input);
- bytesread += sizeof(length);
- w = length - 6;
-
-// process chunk if we care about it, otherwise skip it
- switch (type)
- {
- case TRI_VERTEXL:
- w -= ParseVertexL (input);
- goto ParseSubchunk;
-
- case TRI_FACEL1:
- w -= ParseFaceL1 (input);
- goto ParseSubchunk;
-
- case EDIT_OBJECT:
- // read the name
- i = 0;
-
- do
- {
- if (feof(input))
- Error ("Error: unexpected end of file");
-
- fread (&temp[i], 1, 1, input);
- i++;
- w--;
- bytesread++;
- } while (temp[i-1]);
-
- case MAIN3DS:
- case OBJ_TRIMESH:
- case EDIT3DS:
- // parse through subchunks
-ParseSubchunk:
- while (w > 0)
- {
- w -= ParseChunk (input);
- }
-
- retval = length;
- goto Done;
-
- default:
- // skip other chunks
- while (w > 0)
- {
- t = w;
-
- if (t > BLOCK_SIZE)
- t = BLOCK_SIZE;
-
- if (feof(input))
- Error ("Error: unexpected end of file");
-
- fread (&temp, t, 1, input);
- bytesread += t;
-
- w -= t;
- }
-
- retval = length;
- goto Done;
- }
-
-Done:
- level--;
- return retval;
-}
-
-
-void Load3DSTriangleList (char *filename, triangle_t **pptri, int *numtriangles)
-{
- FILE *input;
- short int tshort;
-
- bytesread = 0;
- level = 0;
- numtris = 0;
- totaltris = 0;
- vertsfound = 0;
- trisfound = 0;
-
- if ((input = fopen(filename, "rb")) == 0) {
- fprintf(stderr,"reader: could not open file '%s'\n", filename);
- exit(0);
- }
-
- fread(&tshort, sizeof(tshort), 1, input);
-
-// should only be MAIN3DS, but some files seem to start with EDIT3DS, with
-// no MAIN3DS
- if ((tshort != MAIN3DS) && (tshort != EDIT3DS)) {
- fprintf(stderr,"File is not a 3DS file.\n");
- exit(0);
- }
-
-// back to top of file so we can parse the first chunk descriptor
- fseek(input, 0, SEEK_SET);
-
- ptri = malloc (MAXTRIANGLES * sizeof(triangle_t));
-
- *pptri = ptri;
-
-// parse through looking for the relevant chunk tree (MAIN3DS | EDIT3DS | EDIT_OBJECT |
-// OBJ_TRIMESH | {TRI_VERTEXL, TRI_FACEL1}) and skipping other chunks
- ParseChunk (input);
-
- if (vertsfound || trisfound)
- Error ("Incomplete triangle set");
-
- *numtriangles = totaltris;
-
- fclose (input);
-}
-
projects / voretournament / voretournament.git / blobdiff