aas_file.c

3D 游戏界的大牛人 John Carmack 终于放出了 Q3 的源代码

/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.

This file is part of Quake III Arena source code.

Quake III Arena 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 III Arena 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 Foobar; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
===========================================================================
*/

#include "qbsp.h"
#include "../botlib/aasfile.h"
#include "aas_file.h"
#include "aas_store.h"
#include "aas_create.h"

#define AAS_Error			Error

//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
void AAS_SwapAASData(void)
{
	int i, j;
	//bounding boxes
	for (i = 0; i < aasworld.numbboxes; i++)
	{
		aasworld.bboxes[i].presencetype = LittleLong(aasworld.bboxes[i].presencetype);
		aasworld.bboxes[i].flags = LittleLong(aasworld.bboxes[i].flags);
		for (j = 0; j < 3; j++)
		{
			aasworld.bboxes[i].mins[j] = LittleLong(aasworld.bboxes[i].mins[j]);
			aasworld.bboxes[i].maxs[j] = LittleLong(aasworld.bboxes[i].maxs[j]);
		} //end for
	} //end for
	//vertexes
	for (i = 0; i < aasworld.numvertexes; i++)
	{
		for (j = 0; j < 3; j++)
			aasworld.vertexes[i][j] = LittleFloat(aasworld.vertexes[i][j]);
	} //end for
	//planes
	for (i = 0; i < aasworld.numplanes; i++)
	{
		for (j = 0; j < 3; j++)
			aasworld.planes[i].normal[j] = LittleFloat(aasworld.planes[i].normal[j]);
		aasworld.planes[i].dist = LittleFloat(aasworld.planes[i].dist);
		aasworld.planes[i].type = LittleLong(aasworld.planes[i].type);
	} //end for
	//edges
	for (i = 0; i < aasworld.numedges; i++)
	{
		aasworld.edges[i].v[0] = LittleLong(aasworld.edges[i].v[0]);
		aasworld.edges[i].v[1] = LittleLong(aasworld.edges[i].v[1]);
	} //end for
	//edgeindex
	for (i = 0; i < aasworld.edgeindexsize; i++)
	{
		aasworld.edgeindex[i] = LittleLong(aasworld.edgeindex[i]);
	} //end for
	//faces
	for (i = 0; i < aasworld.numfaces; i++)
	{
		aasworld.faces[i].planenum = LittleLong(aasworld.faces[i].planenum);
		aasworld.faces[i].faceflags = LittleLong(aasworld.faces[i].faceflags);
		aasworld.faces[i].numedges = LittleLong(aasworld.faces[i].numedges);
		aasworld.faces[i].firstedge = LittleLong(aasworld.faces[i].firstedge);
		aasworld.faces[i].frontarea = LittleLong(aasworld.faces[i].frontarea);
		aasworld.faces[i].backarea = LittleLong(aasworld.faces[i].backarea);
	} //end for
	//face index
	for (i = 0; i < aasworld.faceindexsize; i++)
	{
		aasworld.faceindex[i] = LittleLong(aasworld.faceindex[i]);
	} //end for
	//convex areas
	for (i = 0; i < aasworld.numareas; i++)
	{
		aasworld.areas[i].areanum = LittleLong(aasworld.areas[i].areanum);
		aasworld.areas[i].numfaces = LittleLong(aasworld.areas[i].numfaces);
		aasworld.areas[i].firstface = LittleLong(aasworld.areas[i].firstface);
		for (j = 0; j < 3; j++)
		{
			aasworld.areas[i].mins[j] = LittleFloat(aasworld.areas[i].mins[j]);
			aasworld.areas[i].maxs[j] = LittleFloat(aasworld.areas[i].maxs[j]);
			aasworld.areas[i].center[j] = LittleFloat(aasworld.areas[i].center[j]);
		} //end for
	} //end for
	//area settings
	for (i = 0; i < aasworld.numareasettings; i++)
	{
		aasworld.areasettings[i].contents = LittleLong(aasworld.areasettings[i].contents);
		aasworld.areasettings[i].areaflags = LittleLong(aasworld.areasettings[i].areaflags);
		aasworld.areasettings[i].presencetype = LittleLong(aasworld.areasettings[i].presencetype);
		aasworld.areasettings[i].cluster = LittleLong(aasworld.areasettings[i].cluster);
		aasworld.areasettings[i].clusterareanum = LittleLong(aasworld.areasettings[i].clusterareanum);
		aasworld.areasettings[i].numreachableareas = LittleLong(aasworld.areasettings[i].numreachableareas);
		aasworld.areasettings[i].firstreachablearea = LittleLong(aasworld.areasettings[i].firstreachablearea);
	} //end for
	//area reachability
	for (i = 0; i < aasworld.reachabilitysize; i++)
	{
		aasworld.reachability[i].areanum = LittleLong(aasworld.reachability[i].areanum);
		aasworld.reachability[i].facenum = LittleLong(aasworld.reachability[i].facenum);
		aasworld.reachability[i].edgenum = LittleLong(aasworld.reachability[i].edgenum);
		for (j = 0; j < 3; j++)
		{
			aasworld.reachability[i].start[j] = LittleFloat(aasworld.reachability[i].start[j]);
			aasworld.reachability[i].end[j] = LittleFloat(aasworld.reachability[i].end[j]);
		} //end for
		aasworld.reachability[i].traveltype = LittleLong(aasworld.reachability[i].traveltype);
		aasworld.reachability[i].traveltime = LittleShort(aasworld.reachability[i].traveltime);
	} //end for
	//nodes
	for (i = 0; i < aasworld.numnodes; i++)
	{
		aasworld.nodes[i].planenum = LittleLong(aasworld.nodes[i].planenum);
		aasworld.nodes[i].children[0] = LittleLong(aasworld.nodes[i].children[0]);
		aasworld.nodes[i].children[1] = LittleLong(aasworld.nodes[i].children[1]);
	} //end for
	//cluster portals
	for (i = 0; i < aasworld.numportals; i++)
	{
		aasworld.portals[i].areanum = LittleLong(aasworld.portals[i].areanum);
		aasworld.portals[i].frontcluster = LittleLong(aasworld.portals[i].frontcluster);
		aasworld.portals[i].backcluster = LittleLong(aasworld.portals[i].backcluster);
		aasworld.portals[i].clusterareanum[0] = LittleLong(aasworld.portals[i].clusterareanum[0]);
		aasworld.portals[i].clusterareanum[1] = LittleLong(aasworld.portals[i].clusterareanum[1]);
	} //end for
	//cluster portal index
	for (i = 0; i < aasworld.portalindexsize; i++)
	{
		aasworld.portalindex[i] = LittleLong(aasworld.portalindex[i]);
	} //end for
	//cluster
	for (i = 0; i < aasworld.numclusters; i++)
	{
		aasworld.clusters[i].numareas = LittleLong(aasworld.clusters[i].numareas);
		aasworld.clusters[i].numportals = LittleLong(aasworld.clusters[i].numportals);
		aasworld.clusters[i].firstportal = LittleLong(aasworld.clusters[i].firstportal);
	} //end for
} //end of the function AAS_SwapAASData
//===========================================================================
// dump the current loaded aas file
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
void AAS_DumpAASData(void)
{
	/*
	if (aasworld.vertexes) FreeMemory(aasworld.vertexes);
	aasworld.vertexes = NULL;
	if (aasworld.planes) FreeMemory(aasworld.planes);
	aasworld.planes = NULL;
	if (aasworld.edges) FreeMemory(aasworld.edges);
	aasworld.edges = NULL;
	if (aasworld.edgeindex) FreeMemory(aasworld.edgeindex);
	aasworld.edgeindex = NULL;
	if (aasworld.faces) FreeMemory(aasworld.faces);
	aasworld.faces = NULL;
	if (aasworld.faceindex) FreeMemory(aasworld.faceindex);
	aasworld.faceindex = NULL;
	if (aasworld.areas) FreeMemory(aasworld.areas);
	aasworld.areas = NULL;
	if (aasworld.areasettings) FreeMemory(aasworld.areasettings);
	aasworld.areasettings = NULL;
	if (aasworld.reachability) FreeMemory(aasworld.reachability);
	aasworld.reachability = NULL;
	*/
	aasworld.loaded = false;
} //end of the function AAS_DumpAASData
//===========================================================================
// allocate memory and read a lump of a AAS file
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
char *AAS_LoadAASLump(FILE *fp, int offset, int length, void *buf)
{
	if (!length)
	{
		printf("lump size 0\n");
		return buf;
	} //end if
	//seek to the data
	if (fseek(fp, offset, SEEK_SET))
	{
		AAS_Error("can't seek to lump\n");
		AAS_DumpAASData();
		fclose(fp);
		return 0;
	} //end if
	//allocate memory
	if (!buf) buf = (void *) GetClearedMemory(length);
	//read the data
	if (fread((char *) buf, 1, length, fp) != length)
	{
		AAS_Error("can't read lump\n");
		FreeMemory(buf);
		AAS_DumpAASData();
		fclose(fp);
		return NULL;
	} //end if
	return buf;
} //end of the function AAS_LoadAASLump
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void AAS_DData(unsigned char *data, int size)
{
	int i;

	for (i = 0; i < size; i++)
	{
		data[i] ^= (unsigned char) i * 119;
	} //end for
} //end of the function AAS_DData
//===========================================================================
// load an aas file
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
qboolean AAS_LoadAASFile(char *filename, int fpoffset, int fplength)
{
	FILE *fp;
	aas_header_t header;
	int offset, length;

	//dump current loaded aas file
	AAS_DumpAASData();
	//open the file
	fp = fopen(filename, "rb");
	if (!fp)
	{
		AAS_Error("can't open %s\n", filename);
		return false;
	} //end if
	//seek to the correct position (in the pak file)
	if (fseek(fp, fpoffset, SEEK_SET))
	{
		AAS_Error("can't seek to file %s\n");
		fclose(fp);
		return false;
	} //end if
	//read the header
	if (fread(&header, sizeof(aas_header_t), 1, fp) != 1)
	{
		AAS_Error("can't read header of file %s\n", filename);
		fclose(fp);
		return false;
	} //end if
	//check header identification