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| Rev | Author | Line No. | Line |
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| 10 | reyssat | 1 | /* Copyright (C) 1998-2003 XIAO, Gang of Universite de Nice - Sophia Antipolis |
| 2 | * |
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| 3 | * This program is free software; you can redistribute it and/or modify |
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| 4 | * it under the terms of the GNU General Public License as published by |
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| 5 | * the Free Software Foundation; either version 2 of the License, or |
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| 6 | * (at your option) any later version. |
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| 7 | * |
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| 8 | * This program is distributed in the hope that it will be useful, |
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| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 11 | * GNU General Public License for more details. |
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| 12 | * |
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| 13 | * You should have received a copy of the GNU General Public License |
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| 14 | * along with this program; if not, write to the Free Software |
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| 15 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 16 | */ |
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| 17 | |||
| 18 | static int _lcomp(const void *l1, const void *l2) |
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| 19 | { |
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| 20 | const double *d1, *d2; |
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| 21 | double d; |
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| 22 | d1=(const double *) l1; d2=(const double *) l2; |
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| 23 | d=*d1-*d2; |
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| 24 | if(d<0) return -1; if(d>0) return 1; |
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| 25 | return 0; |
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| 26 | } |
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| 27 | |||
| 28 | static double lc_scalex(leveldata *ld, int x) |
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| 29 | { |
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| 30 | if(x<0) x=0; if(x>=ld->xsize) x=ld->xsize-1; |
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| 31 | return ld->xspan*((double) x - 0.40127)/ld->xsize+ld->xrange[0]; |
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| 32 | } |
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| 33 | |||
| 34 | static double lc_scaley(leveldata *ld, int y) |
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| 35 | { |
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| 36 | if(y<0) y=0; if(y>=ld->ysize) y=ld->ysize-1; |
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| 37 | return -ld->yspan*((double) y - 0.40127)/ld->ysize+ld->yrange[1]; |
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| 38 | } |
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| 39 | |||
| 40 | static int _getlevel(leveldata *ld, int x, int y) |
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| 41 | { |
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| 42 | double dd; |
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| 43 | int i; |
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| 7840 | bpr | 44 | |
| 10 | reyssat | 45 | eval_setval(ld->xevpos,lc_scalex(ld,x)); |
| 46 | eval_setval(ld->yevpos,lc_scaley(ld,y)); |
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| 7847 | bpr | 47 | dd=checked_eval(ld->fn); |
| 10 | reyssat | 48 | for(i=0;i<ld->levelcnt && dd>ld->levels[i];i++); |
| 49 | return i; |
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| 50 | } |
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| 51 | |||
| 52 | static void lc_replacexy(leveldata *ld) |
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| 53 | { |
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| 54 | char *pp; |
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| 55 | for(pp=varchr(ld->fn,ld->xname);pp!=NULL;pp=varchr(pp,ld->xname)) { |
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| 7840 | bpr | 56 | string_modify(ld->fn,pp,pp+strlen(ld->xname),EV_X); |
| 57 | pp+=strlen(EV_X); |
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| 10 | reyssat | 58 | } |
| 59 | for(pp=varchr(ld->fn,ld->yname);pp!=NULL;pp=varchr(pp,ld->yname)) { |
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| 7840 | bpr | 60 | string_modify(ld->fn,pp,pp+strlen(ld->yname),EV_Y); |
| 61 | pp+=strlen(EV_Y); |
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| 10 | reyssat | 62 | } |
| 63 | } |
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| 64 | |||
| 7840 | bpr | 65 | /* produces level curve data. Returns non-zero if error. */ |
| 10 | reyssat | 66 | int levelcurve(leveldata *ld) |
| 67 | { |
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| 68 | int xx,yy,xi,yi,xsteps,ysteps; |
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| 69 | int i,x,y,xt,yt; |
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| 70 | short int l1[LEVELSIZE_LIM+16], l2[LEVELSIZE_LIM+16]; |
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| 71 | short int l3[LEVELGRAIN_LIM+2][LEVELGRAIN_LIM+2]; |
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| 72 | char f[MAX_LINELEN+1]; |
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| 7840 | bpr | 73 | |
| 10 | reyssat | 74 | ld->datacnt=0; |
| 75 | if(ld->fn==NULL || *(ld->fn)==0 || ld->levelcnt<1) return 1; |
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| 76 | if(ld->grain<1) ld->grain=4; |
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| 77 | if(ld->grain>LEVELGRAIN_LIM) ld->grain=LEVELGRAIN_LIM; |
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| 78 | if(ld->levelcnt>LEVEL_LIM) ld->levelcnt=LEVEL_LIM; |
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| 79 | if(ld->xsize<10 || ld->xsize>LEVELSIZE_LIM) return 2; |
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| 80 | if(ld->ysize<10 || ld->ysize>LEVELSIZE_LIM) return 2; |
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| 81 | if(check_parentheses(ld->fn,0)) return 3; |
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| 82 | ld->xspan=ld->xrange[1]-ld->xrange[0]; |
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| 83 | ld->yspan=ld->yrange[1]-ld->yrange[0]; |
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| 84 | if(ld->levelcnt>1) qsort(ld->levels,ld->levelcnt,sizeof(double),_lcomp); |
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| 85 | if(ld->xname==NULL || *(ld->xname)==0) ld->xname="x"; |
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| 86 | if(ld->yname==NULL || *(ld->yname)==0) ld->yname="y"; |
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| 87 | snprintf(f,sizeof(f),"%s",ld->fn); substitute(f); ld->fn=f; |
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| 88 | ld->xevpos=eval_getpos(EV_X); ld->yevpos=eval_getpos(EV_Y); |
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| 89 | if(ld->xevpos<0 || ld->yevpos<0) return 4; |
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| 90 | lc_replacexy(ld); evalue_compile(f); |
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| 91 | xsteps=(ld->xsize+ld->grain-1)/ld->grain+1; |
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| 92 | ysteps=(ld->ysize+ld->grain-1)/ld->grain+1; |
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| 93 | for(yy=yi=0;yi<ysteps;yy+=ld->grain,yi++) l2[yi]=_getlevel(ld,0,yy); |
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| 94 | l2[ysteps]=l2[ysteps-1]; |
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| 95 | for(xi=1,xx=ld->grain;xi<xsteps && ld->datacnt<LEVELPOINT_LIM;xx+=ld->grain,xi++) { |
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| 7840 | bpr | 96 | memmove(l1,l2,(ysteps+1)*sizeof(short int)); |
| 97 | for(yi=yy=0;yi<ysteps;yy+=ld->grain,yi++) l2[yi]=_getlevel(ld,xx,yy); |
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| 98 | l2[ysteps]=l2[ysteps-1]; |
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| 99 | for(yi=0;yi<ysteps && ld->datacnt<LEVELPOINT_LIM;yi++) |
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| 100 | if(l1[yi]!=l1[yi+1] || l1[yi]!=l2[yi] || l1[yi]!=l2[yi+1]) { |
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| 101 | for(x=0,xt=(xi-1)*ld->grain;x<=ld->grain;x++,xt++) |
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| 7847 | bpr | 102 | for(y=0,yt=yi*ld->grain;y<=ld->grain;y++,yt++) { |
| 7840 | bpr | 103 | if(x==0 && y==0) {l3[x][y]=l1[yi]; continue;} |
| 104 | if(x==0 && y==ld->grain) {l3[x][y]=l1[yi+1]; continue;} |
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| 105 | if(x==ld->grain && y==0) {l3[x][y]=l2[yi]; continue;} |
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| 106 | if(x==ld->grain && y==ld->grain) {l3[x][y]=l2[yi+1]; continue;} |
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| 107 | l3[x][y]=_getlevel(ld,xt,yt); |
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| 7847 | bpr | 108 | } |
| 7840 | bpr | 109 | for(x=0,xt=(xi-1)*ld->grain;x<ld->grain;x++,xt++) |
| 7847 | bpr | 110 | for(y=0,yt=yi*ld->grain;y<ld->grain;y++,yt++) { |
| 7840 | bpr | 111 | i=l3[x][y]; |
| 112 | if((i!=l3[x][y+1] || i!=l3[x+1][y]) && |
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| 113 | ld->datacnt<LEVELPOINT_LIM && |
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| 114 | (i!=l3[x][y+1] || ld->datacnt==0 || |
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| 115 | l3[x+1][y+1]==l3[x+1][y] || |
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| 116 | ld->xdata[ld->datacnt-1]!=xt || |
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| 117 | ld->ydata[ld->datacnt-1]!=yt-1)) { |
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| 118 | ld->xdata[ld->datacnt]=xt; |
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| 119 | ld->ydata[ld->datacnt++]=yt; |
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| 120 | } |
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| 7847 | bpr | 121 | } |
| 7840 | bpr | 122 | } |
| 10 | reyssat | 123 | } |
| 124 | return 0; |
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| 125 | } |
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| 126 |