Initial revision.
This commit is contained in:
curt
parent
0234a6a5f9
commit
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4 changed files with 468 additions and 0 deletions
76
FixObj/Makefile
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76
FixObj/Makefile
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#---------------------------------------------------------------------------
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# Makefile
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#
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# Written by Curtis Olson, started October 1997.
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#
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# Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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#
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# $Id$
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# (Log is kept at end of this file)
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#---------------------------------------------------------------------------
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TARGET = fixobj
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CFILES = main.c obj.c
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OFILES = $(CFILES:.c=.o)
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include ../make.inc
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CFLAGS = $(FG_CFLAGS) -g
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LIBS = ../../Src/Math/libMath.a -lm
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#---------------------------------------------------------------------------
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# Primary Targets
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#---------------------------------------------------------------------------
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all: $(TARGET)
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$(TARGET): $(OFILES)
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$(CC) $(OFILES) -o $(TARGET) $(LIBS)
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clean:
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rm -f *.o $(TARGET) lib*.a *.os2 *~ core
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realclean: clean
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#---------------------------------------------------------------------------
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# Secondary Targets
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#---------------------------------------------------------------------------
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makedepend:
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$(CC) -MM *.c > depend
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include depend
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main.o: main.c
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$(CC) $(CFLAGS) -c main.c -o $@
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obj.o: obj.c
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$(CC) $(CFLAGS) -c obj.c -o $@
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#---------------------------------------------------------------------------
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# $Log$
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# Revision 1.1 1997/12/08 19:28:54 curt
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# Initial revision.
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#
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47
FixObj/main.c
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47
FixObj/main.c
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/* main.c -- read and fix the stripping order of a .obj file
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*
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* Written by Curtis Olson, started December 1997.
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*
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* Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id$
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* (Log is kept at end of this file)
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*/
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#include <stdio.h>
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#include "obj.h"
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int main(int argc, char **argv) {
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char basename[256];
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strcpy(basename, argv[1]);
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/* load the input data files */
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obj_fix(basename);
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return(0);
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}
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/* $Log$
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/* Revision 1.1 1997/12/08 19:28:54 curt
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/* Initial revision.
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/*
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*/
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296
FixObj/obj.c
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296
FixObj/obj.c
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/**************************************************************************
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* obj.c -- routines to handle WaveFront .obj format files.
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*
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* Written by Curtis Olson, started October 1997.
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*
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* Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id$
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* (Log is kept at end of this file)
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**************************************************************************/
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#include <stdio.h>
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#include <string.h>
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#include "obj.h"
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#include "../../Src/Math/mat3.h"
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/* what do ya' know, here's some global variables */
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float nodes[MAXNODES][3];
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float normals[MAXNODES][3];
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int ccw_list[MAXNODES];
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int ccw_list_ptr;
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int cw_list[MAXNODES];
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int cw_list_ptr;
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FILE *in, *out;
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/* some simple list routines */
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/* reset the list */
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void list_init(int *list_ptr) {
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*list_ptr = 0;
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}
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/* add to list */
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void list_add(int *list, int *list_ptr, int node) {
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if ( *list_ptr >= MAXNODES ) {
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printf("ERROR: list overflow in list_add()\n");
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exit(-1);
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}
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list[*list_ptr] = node;
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*list_ptr += 1;
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printf("list pointer = %d adding %d\n", *list_ptr, node);
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}
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/* dump list */
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void dump_list(int *list, int list_ptr) {
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int i;
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if ( list_ptr < 3 ) {
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printf("List is empty ... skipping\n");
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return;
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}
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printf("Dumping list, size = %d\n", list_ptr);
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i = 0;
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while ( i < list_ptr ) {
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/* do next strip */
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/* dump header */
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fprintf(out, "t %d %d %d\n", list[i], list[i+1], list[i+2]);
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printf("t %d %d %d\n", list[i], list[i+1], list[i+2]);
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i += 3;
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/* dump rest of strip (until -1) */
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while ( (i < list_ptr) && (list[i] != -1) ) {
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fprintf(out, "q %d", list[i]);
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i++;
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if ( (i < list_ptr) && (list[i] != -1) ) {
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fprintf(out, " %d", list[i]);
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i++;
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}
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fprintf(out, "\n");
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}
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i++;
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}
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}
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/* Check the direction the current triangle faces, compared to it's
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* pregenerated normal. Returns the dot product between the target
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* normal and actual normal. If the dot product is close to 1.0, they
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* nearly match. If the are close to -1.0, the are nearly
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* opposite. */
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double check_cur_face(int n1, int n2, int n3) {
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double v1[3], v2[3], approx_normal[3], dot_prod, temp;
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/* check for the proper rotation by calculating an approximate
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* normal and seeing if it is close to the precalculated normal */
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v1[0] = nodes[n2][0] - nodes[n1][0];
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v1[1] = nodes[n2][1] - nodes[n1][1];
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v1[2] = nodes[n2][2] - nodes[n1][2];
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v2[0] = nodes[n3][0] - nodes[n1][0];
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v2[1] = nodes[n3][1] - nodes[n1][1];
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v2[2] = nodes[n3][2] - nodes[n1][2];
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MAT3cross_product(approx_normal, v1, v2);
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MAT3_NORMALIZE_VEC(approx_normal,temp);
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dot_prod = MAT3_DOT_PRODUCT(normals[n1], approx_normal);
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/* not first triangle */
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/* if ( ((dot_prod < -0.5) && !is_backwards) ||
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((dot_prod > 0.5) && is_backwards) ) {
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printf(" Approx normal = %.2f %.2f %.2f\n", approx_normal[0],
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approx_normal[1], approx_normal[2]);
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printf(" Dot product = %.4f\n", dot_prod);
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} */
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/* angle = acos(dot_prod); */
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/* printf("Normal ANGLE = %.3f rads.\n", angle); */
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return(dot_prod);
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}
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/* Load a .obj file */
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void obj_fix(char *basename) {
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char line[256];
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char inpath[256], outpath[256];
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double dot_prod;
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int first, ncount, vncount, n1, n2, n3, n4;
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int is_ccw;
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strcpy(inpath, basename);
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strcat(inpath, ".obj");
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strcpy(outpath, basename);
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strcat(outpath, ".1.obj");
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if ( (in = fopen(inpath, "r")) == NULL ) {
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printf("Cannot open file: %s\n", inpath);
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exit(-1);
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}
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if ( (out = fopen(outpath, "w")) == NULL ) {
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printf("Cannot open file: %s\n", outpath);
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exit(-1);
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}
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list_init(&ccw_list_ptr);
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list_init(&cw_list_ptr);
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first = 1;
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ncount = 1;
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vncount = 1;
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printf("Reading file: %s\n", inpath);
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while ( fgets(line, 250, in) != NULL ) {
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if ( line[0] == '#' ) {
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/* pass along the comments verbatim */
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fprintf(out, "%s", line);
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} else if ( strlen(line) <= 1 ) {
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/* pass along empty lines */
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fprintf(out, "%s", line);
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} else if ( strncmp(line, "v ", 2) == 0 ) {
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/* save vertex to memory and output to file */
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if ( ncount < MAXNODES ) {
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/* printf("vertex = %s", line); */
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sscanf(line, "v %f %f %f\n",
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&nodes[ncount][0], &nodes[ncount][1], &nodes[ncount][2]);
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fprintf(out, "v %.2f %.2f %.2f\n",
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nodes[ncount][0], nodes[ncount][1], nodes[ncount][2]);
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ncount++;
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} else {
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printf("Read too many nodes ... dying :-(\n");
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exit(-1);
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}
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} else if ( strncmp(line, "vn ", 3) == 0 ) {
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/* save vertex normals to memory and output to file */
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if ( vncount < MAXNODES ) {
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/* printf("vertex normal = %s", line); */
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sscanf(line, "vn %f %f %f\n",
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&normals[vncount][0], &normals[vncount][1],
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&normals[vncount][2]);
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fprintf(out, "vn %.4f %.4f %.4f\n", normals[vncount][0],
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normals[vncount][1], normals[vncount][2]);
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vncount++;
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} else {
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printf("Read too many vertex normals ... dying :-(\n");
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exit(-1);
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}
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} else if ( line[0] == 't' ) {
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/* starting a new triangle strip */
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printf("Starting a new triangle strip\n");
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n1 = n2 = n3 = n4 = 0;
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printf("new tri strip = %s", line);
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sscanf(line, "t %d %d %d %d\n", &n1, &n2, &n3, &n4);
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dot_prod = check_cur_face(n1, n2, n3);
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if ( dot_prod < -0.5 ) {
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/* this stripe is backwards (CW) */
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is_ccw = 0;
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printf(" -> Starting a backwards stripe\n");
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} else {
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/* this stripe is normal (CCW) */
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is_ccw = 1;
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}
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if ( is_ccw ) {
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if ( ccw_list_ptr ) {
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list_add(ccw_list, &ccw_list_ptr, -1);
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}
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list_add(ccw_list, &ccw_list_ptr, n1);
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list_add(ccw_list, &ccw_list_ptr, n2);
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list_add(ccw_list, &ccw_list_ptr, n3);
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} else {
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if ( cw_list_ptr ) {
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list_add(cw_list, &cw_list_ptr, -1);
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}
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list_add(cw_list, &cw_list_ptr, n1);
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list_add(cw_list, &cw_list_ptr, n2);
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list_add(cw_list, &cw_list_ptr, n3);
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}
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if ( n4 > 0 ) {
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if ( is_ccw ) {
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list_add(ccw_list, &ccw_list_ptr, n4);
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} else {
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list_add(cw_list, &cw_list_ptr, n4);
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}
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}
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} else if ( line[0] == 'f' ) {
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/* pass along the unoptimized faces verbatim */
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fprintf(out, "%s", line);
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} else if ( line[0] == 'q' ) {
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/* continue a triangle strip */
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n1 = n2 = 0;
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/* printf("continued tri strip = %s ", line); */
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sscanf(line, "q %d %d\n", &n1, &n2);
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if ( is_ccw ) {
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list_add(ccw_list, &ccw_list_ptr, n1);
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} else {
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list_add(cw_list, &cw_list_ptr, n1);
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}
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if ( n2 > 0 ) {
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if ( is_ccw ) {
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list_add(ccw_list, &ccw_list_ptr, n2);
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} else {
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list_add(cw_list, &cw_list_ptr, n2);
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}
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}
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} else {
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printf("Unknown line in %s = %s\n", inpath, line);
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}
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}
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fprintf(out, "winding ccw\n");
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dump_list(ccw_list, ccw_list_ptr);
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fprintf(out, "winding cw\n");
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dump_list(cw_list, cw_list_ptr);
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fclose(in);
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fclose(out);
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}
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/* $Log$
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||||
/* Revision 1.1 1997/12/08 19:28:54 curt
|
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/* Initial revision.
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/*
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*/
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49
FixObj/obj.h
Normal file
49
FixObj/obj.h
Normal file
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@ -0,0 +1,49 @@
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/**************************************************************************
|
||||
* obj.h -- routines to handle WaveFront .obj format files.
|
||||
*
|
||||
* Written by Curtis Olson, started October 1997.
|
||||
*
|
||||
* Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
|
||||
*
|
||||
* This program 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.
|
||||
*
|
||||
* This program 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 this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*
|
||||
* $Id$
|
||||
* (Log is kept at end of this file)
|
||||
**************************************************************************/
|
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|
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|
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#ifndef OBJ_H
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#define OBJ_H
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#define MAXNODES 100000
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extern float nodes[MAXNODES][3];
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extern float normals[MAXNODES][3];
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extern int stack[MAXNODES];
|
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|
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|
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/* Load a .obj file */
|
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void obj_fix(char *basename);
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|
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|
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#endif /* OBJ_H */
|
||||
|
||||
|
||||
/* $Log$
|
||||
/* Revision 1.1 1997/12/08 19:28:55 curt
|
||||
/* Initial revision.
|
||||
/*
|
||||
*/
|
||||
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