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greg |
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#ifndef lint |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* mgraph.c - routines for plotting graphs from variables. |
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* |
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* 6/23/86 |
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* |
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* Greg Ward Larson |
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*/ |
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#include <stdio.h> |
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#include "mgvars.h" |
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#include "mgraph.h" |
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extern char *progname; /* argv[0] */ |
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extern double goodstep(), floor(), ceil(), sin(), cos(); |
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static BOUNDS xbounds, ybounds; /* the boundaries for the graph */ |
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static double period = DEFPERIOD; /* period for polar plot */ |
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static double axbegin, axsize; /* the mapped x axis boundaries */ |
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static double aybegin, aysize; /* the mapped y axis boundaries */ |
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static int npltbl[MAXCUR]; /* plottable points per curve */ |
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static double lastx, lasty; /* last curve postion */ |
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static int nplottable; /* number of plottable points */ |
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static int nplotted; /* number of plotted points */ |
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mgraph() /* plot the current graph */ |
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{ |
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/* load the symbol file */ |
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if (gparam[SYMFILE].flags & DEFINED) |
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minclude(gparam[SYMFILE].v.s); |
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/* check for polar plot */ |
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if (gparam[PERIOD].flags & DEFINED) |
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period = varvalue(gparam[PERIOD].name); |
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getbounds(); /* get the boundaries */ |
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makeaxis(); /* draw the coordinate axis */ |
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plotcurves(); /* plot the curves */ |
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mendpage(); /* advance page */ |
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} |
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getbounds() /* compute the boundaries */ |
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{ |
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int i, stretchbounds(); |
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xbounds.min = gparam[XMIN].flags & DEFINED ? |
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varvalue(gparam[XMIN].name) - FTINY : |
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FHUGE ; |
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xbounds.max = gparam[XMAX].flags & DEFINED ? |
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varvalue(gparam[XMAX].name) + FTINY : |
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-FHUGE ; |
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ybounds.min = gparam[YMIN].flags & DEFINED ? |
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varvalue(gparam[YMIN].name) - FTINY : |
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FHUGE ; |
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ybounds.max = gparam[YMAX].flags & DEFINED ? |
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varvalue(gparam[YMAX].name) + FTINY : |
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-FHUGE ; |
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nplottable = 0; |
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for (i = 0; i < MAXCUR; i++) { |
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npltbl[i] = 0; |
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mgcurve(i, stretchbounds); |
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nplottable += npltbl[i]; |
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} |
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if (nplottable == 0) { |
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fprintf(stderr, "%s: no plottable data\n", progname); |
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quit(1); |
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} |
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xbounds.step = gparam[XSTEP].flags & DEFINED ? |
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varvalue(gparam[XSTEP].name) : |
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period > FTINY ? |
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DEFPLSTEP*period : |
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goodstep(xbounds.max - xbounds.min) ; |
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if (!(gparam[XMIN].flags & DEFINED)) |
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xbounds.min = floor(xbounds.min/xbounds.step) * |
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xbounds.step; |
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if (!(gparam[XMAX].flags & DEFINED)) |
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xbounds.max = ceil(xbounds.max/xbounds.step) * |
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xbounds.step; |
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ybounds.step = gparam[YSTEP].flags & DEFINED ? |
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varvalue(gparam[YSTEP].name) : |
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period > FTINY ? |
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goodstep((ybounds.max - ybounds.min)*1.75) : |
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goodstep(ybounds.max - ybounds.min) ; |
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if (!(gparam[YMIN].flags & DEFINED)) |
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ybounds.min = floor(ybounds.min/ybounds.step) * |
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ybounds.step; |
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if (!(gparam[YMAX].flags & DEFINED)) |
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ybounds.max = ceil(ybounds.max/ybounds.step) * |
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ybounds.step; |
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if (gparam[XMAP].flags & DEFINED) { |
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axbegin = funvalue(gparam[XMAP].name, 1, &xbounds.min); |
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axsize = funvalue(gparam[XMAP].name, 1, &xbounds.max); |
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axsize -= axbegin; |
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} else { |
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axbegin = xbounds.min; |
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axsize = xbounds.max; |
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axsize -= axbegin; |
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} |
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if (gparam[YMAP].flags & DEFINED) { |
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aybegin = funvalue(gparam[YMAP].name, 1, &ybounds.min); |
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aysize = funvalue(gparam[YMAP].name, 1, &ybounds.max); |
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aysize -= aybegin; |
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} else { |
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aybegin = ybounds.min; |
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aysize = ybounds.max; |
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aysize -= aybegin; |
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} |
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} |
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makeaxis() /* draw the coordinate axis */ |
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{ |
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char stmp[64]; |
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if (period > FTINY) |
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polaraxis(); |
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else |
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cartaxis(); |
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/* x axis label */ |
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if (gparam[XLABEL].flags & DEFINED) |
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boxstring(XL_L,XL_D,XL_R,XL_U,gparam[XLABEL].v.s,'r',0,0); |
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/* x mapping */ |
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if (gparam[XMAP].flags & DEFINED) { |
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mgtoa(stmp, &gparam[XMAP]); |
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boxstring(XM_L,XM_D,XM_R,XM_U,stmp,'r',0,0); |
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} |
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/* y axis label */ |
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if (gparam[YLABEL].flags & DEFINED) |
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boxstring(YL_L,YL_D,YL_R,YL_U,gparam[YLABEL].v.s,'u',0,0); |
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/* y mapping */ |
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if (gparam[YMAP].flags & DEFINED) { |
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mgtoa(stmp, &gparam[YMAP]); |
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boxstring(YM_L,YM_D,YM_R,YM_U,stmp,'u',0,0); |
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} |
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/* title */ |
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if (gparam[TITLE].flags & DEFINED) |
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boxstring(TI_L,TI_D,TI_R,TI_U,gparam[TITLE].v.s,'r',2,0); |
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/* subtitle */ |
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if (gparam[SUBTITLE].flags & DEFINED) |
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boxstring(ST_L,ST_D,ST_R,ST_U,gparam[SUBTITLE].v.s,'r',1,0); |
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/* legend */ |
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if (gparam[LEGEND].flags & DEFINED) |
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mtext(LT_X, LT_Y, gparam[LEGEND].v.s, CPI, 0); |
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} |
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polaraxis() /* print polar coordinate axis */ |
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{ |
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int lw, tstyle, t0, t1; |
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double d, d1, ybeg, xstep; |
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char stmp[64], *fmt, *goodformat(); |
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/* get tick style */ |
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if (gparam[TSTYLE].flags & DEFINED) |
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tstyle = varvalue(gparam[TSTYLE].name) + 0.5; |
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else |
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tstyle = DEFTSTYLE; |
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/* start of numbering */ |
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ybeg = ceil(ybounds.min/ybounds.step)*ybounds.step; |
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/* theta (x) numbering */ |
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fmt = goodformat(xbounds.step); |
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for (d = 0.0; d < period-FTINY; d += xbounds.step) { |
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sprintf(stmp, fmt, d); |
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d1 = d*(2*PI)/period; |
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t0 = TN_X + TN_R*cos(d1) + .5; |
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if (t0 < TN_X) |
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t0 -= strlen(stmp)*CWID; |
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mtext(t0,(int)(TN_Y+TN_R*sin(d1)+.5),stmp,CPI,0); |
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} |
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/* radius (y) numbering */ |
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fmt = goodformat(ybounds.step); |
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lw = PL_R+RN_S; |
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for (d = ybeg; d <= ybounds.max+FTINY; d += ybounds.step) { |
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t0 = rconv(d); |
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if (t0 >= lw+RN_S || t0 <= lw-RN_S) { |
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sprintf(stmp, fmt, d); |
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mtext(RN_X+t0-strlen(stmp)*(CWID/2),RN_Y,stmp,CPI,0); |
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lw = t0; |
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} |
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} |
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/* frame */ |
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if (gparam[FTHICK].flags & DEFINED) |
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lw = varvalue(gparam[FTHICK].name) + 0.5; |
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else |
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lw = DEFFTHICK; |
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if (lw-- > 0) { |
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drawcircle(PL_X,PL_Y,PL_R,0,lw,0); |
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switch (tstyle) { |
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case 1: /* outside */ |
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t0 = 0; t1 = TLEN; break; |
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case 2: /* inside */ |
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t0 = TLEN; t1 = 0; break; |
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case 3: /* accross */ |
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t0 = TLEN/2; t1 = TLEN/2; break; |
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default: /* none */ |
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t0 = t1 = 0; break; |
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} |
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if (t0 + t1) { |
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for (d = 0.0; d < 2*PI-FTINY; |
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d += xbounds.step*(2*PI)/period) { |
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mline((int)(PL_X+(PL_R-t0)*cos(d)+.5), |
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(int)(PL_Y+(PL_R-t0)*sin(d)+.5), |
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0, lw, 0); |
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mdraw((int)(PL_X+(PL_R+t1)*cos(d)+.5), |
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(int)(PL_Y+(PL_R+t1)*sin(d)+.5)); |
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} |
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} |
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} |
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/* origin */ |
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if (gparam[OTHICK].flags & DEFINED) |
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lw = varvalue(gparam[OTHICK].name) + 0.5; |
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else |
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lw = DEFOTHICK; |
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if (lw-- > 0) { |
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mline(PL_X-PL_R,PL_Y,0,lw,0); |
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mdraw(PL_X+PL_R,PL_Y); |
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mline(PL_X,PL_Y-PL_R,0,lw,0); |
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mdraw(PL_X,PL_Y+PL_R); |
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if (tstyle > 0) |
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for (d = ybeg; d <= ybounds.max+FTINY; |
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d += ybounds.step) { |
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t0 = rconv(d); |
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mline(PL_X+t0,PL_Y-TLEN/2,0,lw,0); |
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mdraw(PL_X+t0,PL_Y+TLEN/2); |
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mline(PL_X-TLEN/2,PL_Y+t0,0,lw,0); |
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mdraw(PL_X+TLEN/2,PL_Y+t0); |
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mline(PL_X-t0,PL_Y-TLEN/2,0,lw,0); |
| 240 |
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mdraw(PL_X-t0,PL_Y+TLEN/2); |
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mline(PL_X-TLEN/2,PL_Y-t0,0,lw,0); |
| 242 |
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mdraw(PL_X+TLEN/2,PL_Y-t0); |
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} |
| 244 |
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} |
| 245 |
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/* grid */ |
| 246 |
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if (gparam[GRID].flags & DEFINED) |
| 247 |
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lw = varvalue(gparam[GRID].name); |
| 248 |
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else |
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lw = DEFGRID; |
| 250 |
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if (lw-- > 0) { |
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for (d = 0.0; d < PI-FTINY; d += xbounds.step*(2*PI)/period) { |
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mline((int)(PL_X+PL_R*cos(d)+.5), |
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(int)(PL_Y+PL_R*sin(d)+.5),2,0,0); |
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mdraw((int)(PL_X-PL_R*cos(d)+.5), |
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(int)(PL_Y-PL_R*sin(d)+.5)); |
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} |
| 257 |
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for (d = ybeg; d <= ybounds.max + FTINY; d += ybounds.step) |
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drawcircle(PL_X,PL_Y,rconv(d),2,0,0); |
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} |
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} |
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cartaxis() /* print Cartesian coordinate axis */ |
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{ |
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int lw, t0, t1, tstyle; |
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double d, xbeg, ybeg; |
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char stmp[64], *fmt, *goodformat(); |
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register int i; |
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/* get tick style */ |
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if (gparam[TSTYLE].flags & DEFINED) |
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tstyle = varvalue(gparam[TSTYLE].name) + 0.5; |
| 272 |
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else |
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tstyle = DEFTSTYLE; |
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/* start of numbering */ |
| 275 |
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xbeg = ceil(xbounds.min/xbounds.step)*xbounds.step; |
| 276 |
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ybeg = ceil(ybounds.min/ybounds.step)*ybounds.step; |
| 277 |
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| 278 |
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/* x numbering */ |
| 279 |
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fmt = goodformat(xbounds.step); |
| 280 |
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lw = 2*AX_L-AX_R; |
| 281 |
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for (d = xbeg; |
| 282 |
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d <= xbounds.max + FTINY; |
| 283 |
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d += xbounds.step) |
| 284 |
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if ((i = xconv(d)) >= lw+XN_S || i <= lw-XN_S) { |
| 285 |
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sprintf(stmp, fmt, d); |
| 286 |
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mtext(i-strlen(stmp)*(CWID/2)+XN_X,XN_Y,stmp,CPI,0); |
| 287 |
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lw = i; |
| 288 |
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} |
| 289 |
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/* y numbering */ |
| 290 |
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fmt = goodformat(ybounds.step); |
| 291 |
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lw = 2*AX_D-AX_U; |
| 292 |
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for (d = ybeg; |
| 293 |
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d <= ybounds.max + FTINY; |
| 294 |
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d += ybounds.step) |
| 295 |
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if ((i = yconv(d)) >= lw+YN_S || i <= lw-YN_S) { |
| 296 |
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sprintf(stmp, fmt, d); |
| 297 |
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mtext(YN_X-strlen(stmp)*CWID,i+YN_Y,stmp,CPI,0); |
| 298 |
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lw = i; |
| 299 |
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} |
| 300 |
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/* frame */ |
| 301 |
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if (gparam[FTHICK].flags & DEFINED) |
| 302 |
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lw = varvalue(gparam[FTHICK].name) + 0.5; |
| 303 |
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else |
| 304 |
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lw = DEFFTHICK; |
| 305 |
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if (lw-- > 0) { |
| 306 |
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mline(AX_L,AX_D,0,lw,0); |
| 307 |
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mdraw(AX_R,AX_D); |
| 308 |
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mdraw(AX_R,AX_U); |
| 309 |
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mdraw(AX_L,AX_U); |
| 310 |
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mdraw(AX_L,AX_D); |
| 311 |
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switch (tstyle) { |
| 312 |
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case 1: /* outside */ |
| 313 |
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t0 = 0; t1 = TLEN; break; |
| 314 |
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case 2: /* inside */ |
| 315 |
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t0 = TLEN; t1 = 0; break; |
| 316 |
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case 3: /* accross */ |
| 317 |
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t0 = TLEN/2; t1 = TLEN/2; break; |
| 318 |
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default: /* none */ |
| 319 |
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t0 = t1 = 0; break; |
| 320 |
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} |
| 321 |
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if (t0 + t1) { |
| 322 |
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for (d = xbeg; |
| 323 |
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d <= xbounds.max + FTINY; |
| 324 |
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d += xbounds.step) { |
| 325 |
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i = xconv(d); |
| 326 |
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mline(i,AX_D+t0,0,lw,0); |
| 327 |
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mdraw(i,AX_D-t1); |
| 328 |
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mline(i,AX_U-t0,0,lw,0); |
| 329 |
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mdraw(i,AX_U+t1); |
| 330 |
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} |
| 331 |
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for (d = ybeg; |
| 332 |
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d <= ybounds.max + FTINY; |
| 333 |
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d += ybounds.step) { |
| 334 |
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i = yconv(d); |
| 335 |
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mline(AX_L+t0,i,0,lw,0); |
| 336 |
|
|
mdraw(AX_L-t1,i); |
| 337 |
|
|
mline(AX_R-t0,i,0,lw,0); |
| 338 |
|
|
mdraw(AX_R+t1,i); |
| 339 |
|
|
} |
| 340 |
|
|
} |
| 341 |
|
|
} |
| 342 |
|
|
/* origin */ |
| 343 |
|
|
if (gparam[OTHICK].flags & DEFINED) |
| 344 |
|
|
lw = varvalue(gparam[OTHICK].name) + 0.5; |
| 345 |
|
|
else |
| 346 |
|
|
lw = DEFOTHICK; |
| 347 |
|
|
if (lw-- > 0) { |
| 348 |
|
|
i = yconv(0.0); |
| 349 |
|
|
if (i >= AX_D && i <= AX_U) { |
| 350 |
|
|
mline(AX_L,i,0,lw,0); |
| 351 |
|
|
mdraw(AX_R,i); |
| 352 |
|
|
if (tstyle > 0) |
| 353 |
|
|
for (d = xbeg; d <= xbounds.max+FTINY; |
| 354 |
|
|
d += xbounds.step) { |
| 355 |
|
|
mline(xconv(d),i+TLEN/2,0,lw,0); |
| 356 |
|
|
mdraw(xconv(d),i-TLEN/2); |
| 357 |
|
|
} |
| 358 |
|
|
} |
| 359 |
|
|
i = xconv(0.0); |
| 360 |
|
|
if (i >= AX_L && i <= AX_R) { |
| 361 |
|
|
mline(i,AX_D,0,lw,0); |
| 362 |
|
|
mdraw(i,AX_U); |
| 363 |
|
|
if (tstyle > 0) |
| 364 |
|
|
for (d = ybeg; d <= ybounds.max+FTINY; |
| 365 |
|
|
d += ybounds.step) { |
| 366 |
|
|
mline(i+TLEN/2,yconv(d),0,lw,0); |
| 367 |
|
|
mdraw(i-TLEN/2,yconv(d)); |
| 368 |
|
|
} |
| 369 |
|
|
} |
| 370 |
|
|
} |
| 371 |
|
|
/* grid */ |
| 372 |
|
|
if (gparam[GRID].flags & DEFINED) |
| 373 |
|
|
lw = varvalue(gparam[GRID].name); |
| 374 |
|
|
else |
| 375 |
|
|
lw = DEFGRID; |
| 376 |
|
|
if (lw-- > 0) { |
| 377 |
|
|
for (d = xbeg; |
| 378 |
|
|
d <= xbounds.max + FTINY; |
| 379 |
|
|
d += xbounds.step) { |
| 380 |
|
|
i = xconv(d); |
| 381 |
|
|
mline(i,AX_D,2,0,0); |
| 382 |
|
|
mdraw(i,AX_U); |
| 383 |
|
|
} |
| 384 |
|
|
for (d = ybeg; |
| 385 |
|
|
d <= ybounds.max + FTINY; |
| 386 |
|
|
d += ybounds.step) { |
| 387 |
|
|
i = yconv(d); |
| 388 |
|
|
mline(AX_L,i,2,0,0); |
| 389 |
|
|
mdraw(AX_R,i); |
| 390 |
|
|
} |
| 391 |
|
|
} |
| 392 |
|
|
} |
| 393 |
|
|
|
| 394 |
|
|
|
| 395 |
|
|
plotcurves() /* plot the curves */ |
| 396 |
|
|
{ |
| 397 |
|
|
int i, j, k, nextpoint(); |
| 398 |
|
|
|
| 399 |
|
|
for (i = 0; i < MAXCUR; i++) { |
| 400 |
|
|
nplottable = nplotted = 0; |
| 401 |
|
|
lastx = FHUGE; |
| 402 |
|
|
if (mgcurve(i, nextpoint) > 0 && |
| 403 |
|
|
cparam[i][CLABEL].flags & DEFINED) { |
| 404 |
|
|
j = (LE_U-LE_D)/MAXCUR; |
| 405 |
|
|
k = LE_U - i*j; |
| 406 |
|
|
mtext(LE_L+(LE_R-LE_L)/8,k+j/3, |
| 407 |
|
|
cparam[i][CLABEL].v.s,CPI,0); |
| 408 |
|
|
cmsymbol(i,LE_L,k); |
| 409 |
|
|
if (cmline(i,LE_L,k) == 0) |
| 410 |
|
|
mdraw(LE_R-(LE_R-LE_L)/4,k); |
| 411 |
|
|
} |
| 412 |
|
|
} |
| 413 |
|
|
} |
| 414 |
|
|
|
| 415 |
|
|
|
| 416 |
|
|
nextpoint(c, x, y) /* plot the next point for c */ |
| 417 |
|
|
register int c; |
| 418 |
|
|
double x, y; |
| 419 |
|
|
{ |
| 420 |
|
|
if (inbounds(x, y)) { |
| 421 |
|
|
|
| 422 |
|
|
if (!(cparam[c][CNPOINTS].flags & DEFINED) || |
| 423 |
|
|
nplotted * npltbl[c] <= nplottable * |
| 424 |
|
|
(int)varvalue(cparam[c][CNPOINTS].name) ) { |
| 425 |
|
|
csymbol(c, x, y); |
| 426 |
|
|
nplotted++; |
| 427 |
|
|
} |
| 428 |
|
|
nplottable++; |
| 429 |
|
|
if (lastx != FHUGE) |
| 430 |
|
|
climline(c, x, y, lastx, lasty); |
| 431 |
|
|
|
| 432 |
|
|
} else if (inbounds(lastx, lasty)) { |
| 433 |
|
|
|
| 434 |
|
|
climline(c, lastx, lasty, x, y); |
| 435 |
|
|
|
| 436 |
|
|
} |
| 437 |
|
|
lastx = x; |
| 438 |
|
|
lasty = y; |
| 439 |
|
|
} |
| 440 |
|
|
|
| 441 |
|
|
|
| 442 |
|
|
stretchbounds(c, x, y) /* stretch our boundaries */ |
| 443 |
|
|
int c; |
| 444 |
|
|
double x, y; |
| 445 |
|
|
{ |
| 446 |
|
|
if (gparam[XMIN].flags & DEFINED && |
| 447 |
|
|
x < xbounds.min) |
| 448 |
|
|
return; |
| 449 |
|
|
if (gparam[XMAX].flags & DEFINED && |
| 450 |
|
|
x > xbounds.max) |
| 451 |
|
|
return; |
| 452 |
|
|
if (gparam[YMIN].flags & DEFINED && |
| 453 |
|
|
y < ybounds.min) |
| 454 |
|
|
return; |
| 455 |
|
|
if (gparam[YMAX].flags & DEFINED && |
| 456 |
|
|
y > ybounds.max) |
| 457 |
|
|
return; |
| 458 |
|
|
|
| 459 |
|
|
if (x < xbounds.min) |
| 460 |
|
|
xbounds.min = x; |
| 461 |
|
|
if (x > xbounds.max) |
| 462 |
|
|
xbounds.max = x; |
| 463 |
|
|
if (y < ybounds.min) |
| 464 |
|
|
ybounds.min = y; |
| 465 |
|
|
if (y > ybounds.max) |
| 466 |
|
|
ybounds.max = y; |
| 467 |
|
|
|
| 468 |
|
|
npltbl[c]++; |
| 469 |
|
|
} |
| 470 |
|
|
|
| 471 |
|
|
|
| 472 |
|
|
#define exp10(x) exp((x)*2.3025850929940456) |
| 473 |
|
|
|
| 474 |
|
|
double |
| 475 |
|
|
goodstep(interval) /* determine a good step for the interval */ |
| 476 |
|
|
double interval; |
| 477 |
|
|
{ |
| 478 |
|
|
static int steps[] = {50, 20, 10, 5, 2, 1}; |
| 479 |
|
|
double fact, exp(), log10(), floor(); |
| 480 |
|
|
int i; |
| 481 |
|
|
|
| 482 |
|
|
if (interval <= FTINY) |
| 483 |
|
|
return(1.0); |
| 484 |
|
|
fact = exp10(floor(log10(interval)))/10; |
| 485 |
|
|
interval /= fact * MINDIVS; |
| 486 |
|
|
for (i = 0; interval < steps[i]; i++) |
| 487 |
|
|
; |
| 488 |
|
|
return(steps[i] * fact); |
| 489 |
|
|
} |
| 490 |
|
|
|
| 491 |
|
|
#undef exp10 |
| 492 |
|
|
|
| 493 |
|
|
|
| 494 |
|
|
int |
| 495 |
|
|
xconv(x) /* convert x to meta coords */ |
| 496 |
|
|
double x; |
| 497 |
|
|
{ |
| 498 |
|
|
if (gparam[XMAP].flags & DEFINED) |
| 499 |
|
|
x = funvalue(gparam[XMAP].name, 1, &x); |
| 500 |
|
|
x = (x - axbegin)/axsize; |
| 501 |
|
|
return( AX_L + (int)(x*(AX_R-AX_L)) ); |
| 502 |
|
|
} |
| 503 |
|
|
|
| 504 |
|
|
|
| 505 |
|
|
int |
| 506 |
|
|
yconv(y) /* convert y to meta coords */ |
| 507 |
|
|
double y; |
| 508 |
|
|
{ |
| 509 |
|
|
if (gparam[YMAP].flags & DEFINED) |
| 510 |
|
|
y = funvalue(gparam[YMAP].name, 1, &y); |
| 511 |
|
|
y = (y - aybegin)/aysize; |
| 512 |
|
|
return( AX_D + (int)(y*(AX_U-AX_D)) ); |
| 513 |
|
|
} |
| 514 |
|
|
|
| 515 |
|
|
|
| 516 |
|
|
pconv(xp, yp, t, r) /* convert theta and radius to meta coords */ |
| 517 |
|
|
int *xp, *yp; |
| 518 |
|
|
double t, r; |
| 519 |
|
|
{ |
| 520 |
|
|
t *= (2.*PI)/period; |
| 521 |
|
|
r = rconv(r); |
| 522 |
|
|
*xp = r*cos(t) + (PL_X+.5); |
| 523 |
|
|
*yp = r*sin(t) + (PL_Y+.5); |
| 524 |
|
|
} |
| 525 |
|
|
|
| 526 |
|
|
|
| 527 |
|
|
int |
| 528 |
|
|
rconv(r) /* convert radius to meta coords */ |
| 529 |
|
|
double r; |
| 530 |
|
|
{ |
| 531 |
|
|
if (gparam[YMAP].flags & DEFINED) |
| 532 |
|
|
r = funvalue(gparam[YMAP].name, 1, &r); |
| 533 |
|
|
|
| 534 |
|
|
return((r - aybegin)*PL_R/aysize + .5); |
| 535 |
|
|
} |
| 536 |
|
|
|
| 537 |
|
|
|
| 538 |
|
|
boxstring(xmin, ymin, xmax, ymax, s, d, width, color) /* put string in box */ |
| 539 |
|
|
int xmin, ymin, xmax, ymax; |
| 540 |
|
|
char *s; |
| 541 |
|
|
int d, width, color; |
| 542 |
|
|
{ |
| 543 |
|
|
register long size; |
| 544 |
|
|
|
| 545 |
|
|
if (d == 'u' || d == 'd') { /* up or down */ |
| 546 |
|
|
size = strlen(s)*(xmax-xmin)/ASPECT; |
| 547 |
|
|
size -= ymax-ymin; |
| 548 |
|
|
size /= 2; |
| 549 |
|
|
if (size < 0) { /* center */ |
| 550 |
|
|
ymin -= size; |
| 551 |
|
|
ymax += size; |
| 552 |
|
|
} |
| 553 |
|
|
} else { /* left or right */ |
| 554 |
|
|
size = strlen(s)*(ymax-ymin)/ASPECT; |
| 555 |
|
|
size -= xmax-xmin; |
| 556 |
|
|
size /= 2; |
| 557 |
|
|
if (size < 0) { /* center */ |
| 558 |
|
|
xmin -= size; |
| 559 |
|
|
xmax += size; |
| 560 |
|
|
} |
| 561 |
|
|
} |
| 562 |
|
|
mvstr(xmin, ymin, xmax, ymax, s, d, width, color); /* print */ |
| 563 |
|
|
} |
| 564 |
|
|
|
| 565 |
|
|
|
| 566 |
|
|
char * |
| 567 |
|
|
goodformat(d) /* return a suitable format string for d */ |
| 568 |
|
|
double d; |
| 569 |
|
|
{ |
| 570 |
|
|
static char *f[5] = {"%.0f", "%.1f", "%.2f", "%.3f", "%.4f"}; |
| 571 |
|
|
double floor(); |
| 572 |
|
|
register int i; |
| 573 |
|
|
|
| 574 |
|
|
if (d < 0.0) |
| 575 |
|
|
d = -d; |
| 576 |
|
|
if (d > 1e-4 && d < 1e6) |
| 577 |
|
|
for (i = 0; i < 5; i++) { |
| 578 |
|
|
if (d - floor(d+FTINY) <= FTINY) |
| 579 |
|
|
return(f[i]); |
| 580 |
|
|
d *= 10.0; |
| 581 |
|
|
} |
| 582 |
|
|
return("%.1e"); |
| 583 |
|
|
} |
| 584 |
|
|
|
| 585 |
|
|
|
| 586 |
|
|
drawcircle(x, y, r, typ, wid, col) /* draw a circle */ |
| 587 |
|
|
int x, y, r; |
| 588 |
|
|
int typ, wid, col; |
| 589 |
|
|
{ |
| 590 |
|
|
double d; |
| 591 |
|
|
|
| 592 |
|
|
if (r <= 0) |
| 593 |
|
|
return; |
| 594 |
|
|
mline(x+r, y, typ, wid, col); |
| 595 |
|
|
for (d = 2*PI*PL_F; d <= 2*PI+FTINY; d += 2*PI*PL_F) |
| 596 |
|
|
mdraw((int)(x+r*cos(d)+.5), (int)(y+r*sin(d)+.5)); |
| 597 |
|
|
} |
| 598 |
|
|
|
| 599 |
|
|
|
| 600 |
|
|
climline(c, x, y, xout, yout) /* print line from/to out of bounds */ |
| 601 |
|
|
int c; |
| 602 |
|
|
double x, y, xout, yout; |
| 603 |
|
|
{ |
| 604 |
|
|
for ( ; ; ) |
| 605 |
|
|
if (xout < xbounds.min) { |
| 606 |
|
|
yout = y + (yout - y)*(xbounds.min - x)/(xout - x); |
| 607 |
|
|
xout = xbounds.min; |
| 608 |
|
|
} else if (yout < ybounds.min) { |
| 609 |
|
|
xout = x + (xout - x)*(ybounds.min - y)/(yout - y); |
| 610 |
|
|
yout = ybounds.min; |
| 611 |
|
|
} else if (xout > xbounds.max) { |
| 612 |
|
|
yout = y + (yout - y)*(xbounds.max - x)/(xout - x); |
| 613 |
|
|
xout = xbounds.max; |
| 614 |
|
|
} else if (yout > ybounds.max) { |
| 615 |
|
|
xout = x + (xout - x)*(ybounds.max - y)/(yout - y); |
| 616 |
|
|
yout = ybounds.max; |
| 617 |
|
|
} else { |
| 618 |
|
|
cline(c, x, y, xout, yout); |
| 619 |
|
|
break; |
| 620 |
|
|
} |
| 621 |
|
|
} |
| 622 |
|
|
|
| 623 |
|
|
|
| 624 |
|
|
cline(c, u1, v1, u2, v2) /* print a curve line */ |
| 625 |
|
|
int c; |
| 626 |
|
|
double u1, v1, u2, v2; |
| 627 |
|
|
{ |
| 628 |
|
|
int x, y; |
| 629 |
|
|
double ustep, vstep; |
| 630 |
|
|
|
| 631 |
|
|
if (period > FTINY) { /* polar */ |
| 632 |
|
|
if (u1 > u2) { |
| 633 |
|
|
ustep = u1; u1 = u2; u2 = ustep; |
| 634 |
|
|
vstep = v1; v1 = v2; v2 = vstep; |
| 635 |
|
|
} |
| 636 |
|
|
pconv(&x, &y, u1, v1); |
| 637 |
|
|
if (cmline(c, x, y) < 0) |
| 638 |
|
|
return; |
| 639 |
|
|
ustep = period*PL_F; |
| 640 |
|
|
if (u2-u1 > ustep) { |
| 641 |
|
|
vstep = ustep*(v2-v1)/(u2-u1); |
| 642 |
|
|
while ((u1 += ustep) < u2) { |
| 643 |
|
|
v1 += vstep; |
| 644 |
|
|
pconv(&x, &y, u1, v1); |
| 645 |
|
|
mdraw(x, y); |
| 646 |
|
|
} |
| 647 |
|
|
} |
| 648 |
|
|
pconv(&x, &y, u2, v2); |
| 649 |
|
|
mdraw(x, y); |
| 650 |
|
|
} else if (cmline(c, xconv(u1), yconv(v1)) == 0) |
| 651 |
|
|
mdraw(xconv(u2), yconv(v2)); |
| 652 |
|
|
} |
| 653 |
|
|
|
| 654 |
|
|
|
| 655 |
|
|
int |
| 656 |
|
|
cmline(c, x, y) /* start curve line in meta coords */ |
| 657 |
|
|
int c; |
| 658 |
|
|
int x, y; |
| 659 |
|
|
{ |
| 660 |
|
|
int lw, lt, col; |
| 661 |
|
|
register VARIABLE *cv; |
| 662 |
|
|
|
| 663 |
|
|
cv = cparam[c]; |
| 664 |
|
|
if (cv[CLINTYPE].flags & DEFINED) |
| 665 |
|
|
lt = varvalue(cv[CLINTYPE].name); |
| 666 |
|
|
else |
| 667 |
|
|
lt = DEFLINTYPE; |
| 668 |
|
|
if (lt-- <= 0) |
| 669 |
|
|
return(-1); |
| 670 |
|
|
if (cv[CTHICK].flags & DEFINED) |
| 671 |
|
|
lw = varvalue(cv[CTHICK].name); |
| 672 |
|
|
else |
| 673 |
|
|
lw = DEFTHICK; |
| 674 |
|
|
if (lw-- <= 0) |
| 675 |
|
|
return(-1); |
| 676 |
|
|
if (cv[CCOLOR].flags & DEFINED) |
| 677 |
|
|
col = varvalue(cv[CCOLOR].name); |
| 678 |
|
|
else |
| 679 |
|
|
col = DEFCOLOR; |
| 680 |
|
|
if (col-- <= 0) |
| 681 |
|
|
return(-1); |
| 682 |
|
|
mline(x, y, lt, lw, col); |
| 683 |
|
|
return(0); |
| 684 |
|
|
} |
| 685 |
|
|
|
| 686 |
|
|
|
| 687 |
|
|
csymbol(c, u, v) /* plot curve symbol */ |
| 688 |
|
|
int c; |
| 689 |
|
|
double u, v; |
| 690 |
|
|
{ |
| 691 |
|
|
int x, y; |
| 692 |
|
|
|
| 693 |
|
|
if (period > FTINY) { |
| 694 |
|
|
pconv(&x, &y, u, v); |
| 695 |
|
|
cmsymbol(c, x, y); |
| 696 |
|
|
} else |
| 697 |
|
|
cmsymbol(c, xconv(u), yconv(v)); |
| 698 |
|
|
} |
| 699 |
|
|
|
| 700 |
|
|
|
| 701 |
|
|
cmsymbol(c, x, y) /* print curve symbol in meta coords */ |
| 702 |
|
|
int c; |
| 703 |
|
|
int x, y; |
| 704 |
|
|
{ |
| 705 |
|
|
int col, ss; |
| 706 |
|
|
register VARIABLE *cv; |
| 707 |
|
|
|
| 708 |
|
|
cv = cparam[c]; |
| 709 |
|
|
if (!(cv[CSYMTYPE].flags & DEFINED)) |
| 710 |
|
|
return; |
| 711 |
|
|
if (cv[CSYMSIZE].flags & DEFINED) |
| 712 |
|
|
ss = varvalue(cv[CSYMSIZE].name); |
| 713 |
|
|
else |
| 714 |
|
|
ss = DEFSYMSIZE; |
| 715 |
|
|
if (ss <= 0) |
| 716 |
|
|
return; |
| 717 |
|
|
if (cv[CCOLOR].flags & DEFINED) |
| 718 |
|
|
col = varvalue(cv[CCOLOR].name); |
| 719 |
|
|
else |
| 720 |
|
|
col = DEFCOLOR; |
| 721 |
|
|
if (col-- <= 0) |
| 722 |
|
|
return; |
| 723 |
|
|
msegment(x-ss,y-ss,x+ss,y+ss, |
| 724 |
|
|
cv[CSYMTYPE].v.s,'r',0,col); |
| 725 |
|
|
} |
| 726 |
|
|
|
| 727 |
|
|
|
| 728 |
|
|
inbounds(x, y) /* determine if x and y are within gbounds */ |
| 729 |
|
|
double x, y; |
| 730 |
|
|
{ |
| 731 |
|
|
if (x < xbounds.min || x > xbounds.max) |
| 732 |
|
|
return(0); |
| 733 |
|
|
if (y < ybounds.min || y > ybounds.max) |
| 734 |
|
|
return(0); |
| 735 |
|
|
return(1); |
| 736 |
|
|
} |
