track.cpp

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/***************************************************************************
 
    file                 : track.cpp
    created              : Sun Jan 30 22:54:56 CET 2000
    copyright            : (C) 2000-2026 by Eric Espié, Bernhard Wymann
    email                : berniw@bluewin.ch
 
 ***************************************************************************/
 
/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/
 
 
#include <stdlib.h>
#include <math.h>
#include <stdio.h>
 
#include <tgf.h>
#include <track.h>
#include <portability.h>
#include "trackinc.h"
 
const tdble DEGPRAD = 180.0 / PI;   /* degrees per radian */
 
static tTrack *theTrack = NULL;
static tRoadCam *theCamList;
static void *TrackHandle;
 
static void GetTrackHeader(void *TrackHandle);
 
 
/*
 * External function used to (re)build a track
 * from the track file
 */
tTrack *
TrackBuildv1(char *trackfile)
{
    TrackShutdown();
 
    theTrack = (tTrack*)calloc(1, sizeof(tTrack));
    theCamList = (tRoadCam*)NULL;
 
    theTrack->params = TrackHandle = GfParmReadFile (trackfile, GFPARM_RMODE_STD | GFPARM_RMODE_CREAT | GFPARM_RMODE_PRIVATE);
    
    theTrack->filename = strdup(trackfile);
 
    GetTrackHeader(TrackHandle);
 
    
    switch(theTrack->version) {
    case 0:
    case 1:
    case 2:
    case 3:
    ReadTrack3(theTrack, TrackHandle, &theCamList, 0);
    break;
    case 4:
    ReadTrack4(theTrack, TrackHandle, &theCamList, 0);
    break;
    }
 
    return theTrack;
}
 
tTrack *
TrackBuildEx(char *trackfile)
{
    TrackShutdown();
 
    theTrack = (tTrack*)calloc(1, sizeof(tTrack));
    theCamList = (tRoadCam*)NULL;
 
    theTrack->params = TrackHandle = GfParmReadFile (trackfile, GFPARM_RMODE_STD | GFPARM_RMODE_CREAT | GFPARM_RMODE_PRIVATE);
    
    theTrack->filename = strdup(trackfile);
 
    GetTrackHeader(TrackHandle);
 
    switch(theTrack->version) {
    case 0:
    case 1:
    case 2:
    case 3:
    ReadTrack3(theTrack, TrackHandle, &theCamList, 1);
    break;
    case 4:
    ReadTrack4(theTrack, TrackHandle, &theCamList, 1);
    break;
    }
    
    return theTrack;
}
 
 
/*
 * Function
 *  GetTrackHeader
 *
 * Description
 *  Get the header of the track file
 *  in order to know the number of segments
 * Parameters
 *  
 *
 * Return
 *  
 *
 * Remarks
 *  
 */
static void 
GetTrackHeader(void *TrackHandle)
{
    tTrackGraphicInfo *graphic;
    const char **env;
    int i;
    const int BUFSIZE = 256;
    char buf[BUFSIZE];
    char *s;
    
    theTrack->name = GfParmGetStr(TrackHandle, TRK_SECT_HDR, TRK_ATT_NAME, "no name");
    theTrack->version = (int)GfParmGetNum(TrackHandle, TRK_SECT_HDR, TRK_ATT_VERSION, (char*)NULL, 0);
    theTrack->width = GfParmGetNum(TrackHandle, TRK_SECT_MAIN, TRK_ATT_WIDTH, (char*)NULL, 15.0);
    theTrack->author = GfParmGetStr(TrackHandle, TRK_SECT_HDR, TRK_ATT_AUTHOR, "none");
    theTrack->category = GfParmGetStr(TrackHandle, TRK_SECT_HDR, TRK_ATT_CAT, "road");
    
    /* Graphic part */
    graphic = &theTrack->graphic;
    
    graphic->background = GfParmGetStr(TrackHandle, TRK_SECT_GRAPH, TRK_ATT_BKGRND,
                        "background.png");
    graphic->bgtype = (int)GfParmGetNum(TrackHandle, TRK_SECT_GRAPH, TRK_ATT_BGTYPE, (char*)NULL, 0.0);
/*     if (graphic->bgtype > 2) { */
/*  graphic->background2 = GfParmGetStr(TrackHandle, TRK_SECT_GRAPH, TRK_ATT_BKGRND2, */
/*                      "background.png"); */
/*     } */
    graphic->bgColor[0] = (float)GfParmGetNum(TrackHandle, TRK_SECT_GRAPH, TRK_ATT_BGCLR_R, (char*)NULL, 0.0f);
    graphic->bgColor[1] = (float)GfParmGetNum(TrackHandle, TRK_SECT_GRAPH, TRK_ATT_BGCLR_G, (char*)NULL, 0.0f);
    graphic->bgColor[2] = (float)GfParmGetNum(TrackHandle, TRK_SECT_GRAPH, TRK_ATT_BGCLR_B, (char*)NULL, 0.1f);
    
    /* env map images */
    snprintf(buf, BUFSIZE, "%s/%s", TRK_SECT_GRAPH, TRK_LST_ENV);
    graphic->envnb = GfParmGetEltNb(TrackHandle, buf);
    if (graphic->envnb < 1) {
        graphic->envnb = 1;
    }
 
    graphic->env = (const char**)calloc(graphic->envnb, sizeof(char*));
    env = graphic->env;
    for (i = 1; i <= graphic->envnb; i++) {
        snprintf(buf, BUFSIZE, "%s/%s/%d", TRK_SECT_GRAPH, TRK_LST_ENV, i);
        *env = GfParmGetStr(TrackHandle, buf, TRK_ATT_ENVNAME, "env.png");
        env ++;
    }
    
    theTrack->nseg = 0;
    
    s = strrchr(theTrack->filename, '/');
    if (s == NULL) {
        s = theTrack->filename;
    } else {
        s++;
    }
    
    theTrack->internalname = strdup(s);
    s = strrchr(theTrack->internalname, '.');
    if (s != NULL) {
        *s = 0;
    }
    
    graphic->turnMarksInfo.height = GfParmGetNum(TrackHandle, TRK_SECT_TURNMARKS, TRK_ATT_HEIGHT, NULL, 1);
    graphic->turnMarksInfo.width  = GfParmGetNum(TrackHandle, TRK_SECT_TURNMARKS, TRK_ATT_WIDTH,  NULL, 1);
    graphic->turnMarksInfo.vSpace = GfParmGetNum(TrackHandle, TRK_SECT_TURNMARKS, TRK_ATT_VSPACE, NULL, 0);
    graphic->turnMarksInfo.hSpace = GfParmGetNum(TrackHandle, TRK_SECT_TURNMARKS, TRK_ATT_HSPACE, NULL, 0);   
}
 
static void
freeSeg(tTrackSeg *seg)
{
    if (seg->barrier[0]) {
        free(seg->barrier[0]);
    }
    if (seg->barrier[1]) {
        free(seg->barrier[1]);
    }
    if (seg->ext) {
        free(seg->ext->marks);
        free(seg->ext);
    }
    if (seg->lside) {
        freeSeg(seg->lside);
    }
    if (seg->rside) {
        freeSeg(seg->rside);
    }
    free(seg);
}
 
void
TrackShutdown(void)
{
    tTrackSeg *curSeg;
    tTrackSeg *nextSeg;
    tTrackSurface *curSurf;
    tTrackSurface *nextSurf;
    tRoadCam *curCam;
    tRoadCam *nextCam;
 
    if (!theTrack) {
        return;
    }
 
    if (theTrack->seg) {
        nextSeg = theTrack->seg->next;
        do {
            curSeg = nextSeg;
            nextSeg = nextSeg->next;
            freeSeg(curSeg);
        } while (curSeg != theTrack->seg);
    }
 
    curSurf = theTrack->surfaces;
    while (curSurf) {
        nextSurf = curSurf->next;
        free(curSurf);
        curSurf = nextSurf;
    }
 
    curCam = theCamList;
    if (curCam) {
    do {
        nextCam = curCam->next;
        free(curCam);
        curCam = nextCam;
    } while (curCam != theCamList);
    }
    theCamList = NULL;
 
    if (theTrack->pits.driversPits) free(theTrack->pits.driversPits);
    free(theTrack->graphic.env);
    free(theTrack->internalname);
    free(theTrack->filename);
    free(theTrack);
 
    GfParmReleaseHandle(TrackHandle);
    TrackHandle = NULL;
    theTrack = NULL;
}