X-Git-Url: http://de.git.xonotic.org/?p=xonotic%2Fnetradiant.git;a=blobdiff_plain;f=tools%2Fquake2%2Fextra%2Fcommon%2Ftrilib.c;fp=tools%2Fquake2%2Fextra%2Fcommon%2Ftrilib.c;h=60cc0f6c69836a1b4d1c22bb6926b456b8ae1d0f;hp=0000000000000000000000000000000000000000;hb=62d99f889c0e98be65f779d3983109c84ce58cec;hpb=54a001001813df3c27c2b2369ce2ce23d2d39d6a;ds=sidebyside

diff --git a/tools/quake2/extra/common/trilib.c b/tools/quake2/extra/common/trilib.c
new file mode 100644
index 00000000..60cc0f6c
--- /dev/null
+++ b/tools/quake2/extra/common/trilib.c
@@ -0,0 +1,187 @@
+/*
+===========================================================================
+Copyright (C) 1997-2006 Id Software, Inc.
+
+This file is part of Quake 2 Tools source code.
+
+Quake 2 Tools source code 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.
+
+Quake 2 Tools source code 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 Quake 2 Tools source code; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+===========================================================================
+*/
+
+//
+// trilib.c: library for loading triangles from an Alias triangle file
+//
+
+#include <stdio.h>
+#include "cmdlib.h"
+#include "mathlib.h"
+#include "trilib.h"
+
+// on disk representation of a face
+
+
+#define	FLOAT_START	99999.0
+#define	FLOAT_END	-FLOAT_START
+#define MAGIC       123322
+
+//#define NOISY 1
+
+typedef struct {
+	float v[3];
+} vector;
+
+typedef struct
+{
+	vector n;    /* normal */
+	vector p;    /* point */
+	vector c;    /* color */
+	float  u;    /* u */
+	float  v;    /* v */
+} aliaspoint_t;
+
+typedef struct {
+	aliaspoint_t	pt[3];
+} tf_triangle;
+
+
+void ByteSwapTri (tf_triangle *tri)
+{
+	int		i;
+
+	for (i=0 ; i<sizeof(tf_triangle)/4 ; i++)
+	{
+		((int *)tri)[i] = BigLong (((int *)tri)[i]);
+	}
+}
+
+void LoadTriangleList (char *filename, triangle_t **pptri, int *numtriangles)
+{
+	FILE        *input;
+	float       start;
+	char        name[256], tex[256];
+	int         i, count, magic;
+	tf_triangle	tri;
+	triangle_t	*ptri;
+	int			iLevel;
+	int			exitpattern;
+	float		t;
+
+	t = -FLOAT_START;
+	*((unsigned char *)&exitpattern + 0) = *((unsigned char *)&t + 3);
+	*((unsigned char *)&exitpattern + 1) = *((unsigned char *)&t + 2);
+	*((unsigned char *)&exitpattern + 2) = *((unsigned char *)&t + 1);
+	*((unsigned char *)&exitpattern + 3) = *((unsigned char *)&t + 0);
+
+	if ((input = fopen(filename, "rb")) == 0)
+		Error ("reader: could not open file '%s'", filename);
+
+	iLevel = 0;
+
+	fread(&magic, sizeof(int), 1, input);
+	if (BigLong(magic) != MAGIC)
+		Error ("%s is not a Alias object separated triangle file, magic number is wrong.", filename);
+
+	ptri = malloc (MAXTRIANGLES * sizeof(triangle_t));
+
+	*pptri = ptri;
+
+	while (feof(input) == 0) {
+		if (fread(&start,  sizeof(float), 1, input) < 1)
+			break;
+		*(int *)&start = BigLong(*(int *)&start);
+		if (*(int *)&start != exitpattern)
+		{
+			if (start == FLOAT_START) {
+				/* Start of an object or group of objects. */
+				i = -1;
+				do {
+					/* There are probably better ways to read a string from */
+					/* a file, but this does allow you to do error checking */
+					/* (which I'm not doing) on a per character basis.      */
+					++i;
+					fread( &(name[i]), sizeof( char ), 1, input);
+				} while( name[i] != '\0' );
+
+//				indent();
+//				fprintf(stdout,"OBJECT START: %s\n",name);
+				fread( &count, sizeof(int), 1, input);
+				count = BigLong(count);
+				++iLevel;
+				if (count != 0) {
+//					indent();
+//					fprintf(stdout,"NUMBER OF TRIANGLES: %d\n",count);
+
+					i = -1;
+					do {
+						++i;
+						fread( &(tex[i]), sizeof( char ), 1, input);
+					} while( tex[i] != '\0' );
+
+//					indent();
+//					fprintf(stdout,"  Object texture name: '%s'\n",tex);
+				}
+
+				/* Else (count == 0) this is the start of a group, and */
+				/* no texture name is present. */
+			}
+			else if (start == FLOAT_END) {
+				/* End of an object or group. Yes, the name should be */
+				/* obvious from context, but it is in here just to be */
+				/* safe and to provide a little extra information for */
+				/* those who do not wish to write a recursive reader. */
+				/* Mia culpa. */
+				--iLevel;
+				i = -1;
+				do {
+					++i;
+					fread( &(name[i]), sizeof( char ), 1, input);
+				} while( name[i] != '\0' );
+
+//				indent();
+//				fprintf(stdout,"OBJECT END: %s\n",name);
+				continue;
+			}
+		}
+
+//
+// read the triangles
+//
+		for (i = 0; i < count; ++i) {
+			int		j;
+
+			fread( &tri, sizeof(tf_triangle), 1, input );
+			ByteSwapTri (&tri);
+			for (j=0 ; j<3 ; j++)
+			{
+				int		k;
+
+				for (k=0 ; k<3 ; k++)
+				{
+					ptri->verts[j][k] = tri.pt[j].p.v[k];
+				}
+			}
+
+			ptri++;
+
+			if ((ptri - *pptri) >= MAXTRIANGLES)
+				Error ("Error: too many triangles; increase MAXTRIANGLES\n");
+		}
+	}
+
+	*numtriangles = ptri - *pptri;
+
+	fclose (input);
+}
+