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1.1 ! root 1: .so tmac.ilib ! 2: .TH GPACK 2 "The University of Arizona \- 8/12/84" ! 3: .SH NAME ! 4: gpack \- graphics package for the Chromatics CG 3999 ! 5: .SH SYNOPSIS ! 6: .nf ! 7: .ta 1.7i ! 8: \*Mbckgrnd(colr)\fR set background color ! 9: \*M_char()\fR switch to character mode ! 10: \*Mclip(mode)\fR turn clip mode \*MON\fR/\*MOFF\fR ! 11: \*Mclipped(object)\fR clip an object to window size (internal) ! 12: \*Mcolor(colr)\fR set foreground color ! 13: \*Mcurcol(colr)\fR set cursor color ! 14: \*Mdraw(object)\fR display object ! 15: \*Menable(colr)\fR enable particular color guns ! 16: \*Merase()\fR clear the screen ! 17: \*M_fill()\fR turn on fill mode ! 18: \*Mginit()\fR initialize graphics package ! 19: \*Mmode(newmode)\fR set plot submode (internal) ! 20: \*Mmovcur(x,\*by)\fR position cursor (internal) ! 21: \*M_nofill()\fR turn off fill mode ! 22: \*M_noroll()\fR turn off roll mode ! 23: \*M_number(n)\fR output number (\*Mn\fR) (internal) ! 24: \*M_plot()\fR switch to plot mode ! 25: \*M_point(x,\*by)\fR output point (\*Mx\fR,\*My\fR) (internal) ! 26: \*M_restore()\fR reset terminal windows ! 27: \*M_roll()\fR turn on roll mode ! 28: \*Msetscale(xmin,\*bymin,\*bxmax,\*bymax,\*bcolmin,\*browmin,\*bcolmax,\*browmax)\fR ! 29: scaling ! 30: \*Mscale(pt)\fR scale a point ! 31: \*M_scale(mode)\fR turn \*MON\fR/\*MOFF\fR scaling ! 32: \*Mtext(x,\*by,\*bs)\fR output string \*Ms\fR at point (\*Mx\fR,\*My\fR) ! 33: \*Mwindow(w)\fR switch to window \*Mw\fR (1 to 4) ! 34: \*Mwsize(xmin,\*bymin,\*bxmax,\*bymax)\fR ! 35: set window size ! 36: \*Mxfit(x)\fR scale x-coordinate (internal) ! 37: \*M_xydel(xdelta,\*Mydelta)\fR output incremental motion (internal) ! 38: \*Myfit(y)\fR scale y-coordinate (internal) ! 39: .fi ! 40: .PP ! 41: \fIGpack\fR is a package designed to interface to the Chromatics CG 3999 ! 42: Color Graphics Terminal. ! 43: The user must be familiar with the Chromatics terminal and its ! 44: capabilities. ! 45: \fIGpack\fR maintains information on the state of each hardware ! 46: window and avoids the transmission of redundant commands. ! 47: The following objects, defined as records, are known to \fIgpack\fR: ! 48: .DS ! 49: .ta 1.75i ! 50: \*Mpoint(x,\*by)\fR ! 51: \*Mdot(x,\*by)\fR ! 52: \*Mline(a,\*bb)\fR ! 53: \*Mbox(a,\*bb)\fR ! 54: \*Mcircle(center,\*bradius)\fR ! 55: \*Marc(center,\*bradius,\*bstart,\*bstop)\fR ! 56: \*Mpoints(pts)\fR a collection of points. ! 57: \*Mlines(pts)\fR a collection of points, joined by vectors ! 58: \*Mpolygon(pts)\fR a collection of points, joined and closed by vectors ! 59: \*Mincdots(start,\*bmotions)\fR start point and list of motions ! 60: \*Mmotion(xdel,\*bydel)\fR an incremental motion ! 61: .DE ! 62: The procedure \*Mdraw\fR can display any of these objects, with or ! 63: without scaling. ! 64: Additionally, \*Mdraw\fR accepts a co-expression that generates these ! 65: objects. ! 66: .PP ! 67: Two record types are used internally: ! 68: .DS ! 69: .in .5i ! 70: \*Mwind(pmode,\*bsmode,\*bcmode,\*bfmode,\*brmode,\*bpsubmode,\*bfc,\*bbc,\*blowerleft,\*bupperright)\fR ! 71: \*Mscaling(xslope,\*bxinter,\*byslope,\*byinter)\fR ! 72: .in ! 73: .DE ! 74: .in .5i ! 75: where ! 76: .nf ! 77: .sp ! 78: \*Mpmode\fR is \*MON\fR if window is in plot mode. ! 79: \*Msmode\fR is \*MON\fR if scaling is active. ! 80: \*Mcmode\fR is \*MON\fR if clipping is active. ! 81: \*Mfmode\fR is \*MON\fR if fill is active. ! 82: \*Mrmode\fR is \*MON\fR if roll is active. ! 83: \*Mpsubmode\fR is the plot submode. ! 84: \*Mfc\fR is the foreground color. ! 85: \*Mbc\fR is the background color. ! 86: \*Mlowerleft, upperright\fR are the window bounds. ! 87: \*Mxslope, xinter\fR are the x-coordinate scaling constants ! 88: \*Myslope, yinter\fR are the y-coordinate scaling constants ! 89: .sp ! 90: .fi ! 91: The defaults for all windows are: ! 92: .DS ! 93: .in .5i ! 94: \*Mwind(OFF,\*bOFF,\*bOFF,\*bOFF,\*bON,\*b"",\*bNOCOLOR,\*bNOCOLOR,\*bpoint(0,\*b0),\*bpoint(XMAX,\*bYMAX))\fR ! 95: \*Mscaling(1,\*b0,\*b1,\*b0)\fR ! 96: .DE ! 97: .PP ! 98: The following values are predefined globals, and should not be ! 99: reassigned: ! 100: .nf ! 101: .ta 1.5i ! 102: .sp .5 ! 103: \*MMODE, ESC\fR used internally ! 104: \*MON, OFF\fR mode settings ! 105: \*MXMAX, YMAX\fR maximum screen addresses ! 106: \*MDOT,VECTOR,RECTANGLE,CIRCLE,ARC,CONCVECT,INCDOT\fR ! 107: plot submodes ! 108: \*MBLACK,BLUE,GREEN,CYAN,RED,MAGENTA,YELLOW,WHITE,BLINK\fR ! 109: colors ! 110: .fi ! 111: .PP ! 112: The following globals are used internally: ! 113: .nf ! 114: .sp .5 ! 115: \*M_wno\fR current window (1 to 4), initially 1 ! 116: \*Mwindow\fR list of window attributes ! 117: \*Mwscale\fR list of window scaling factors ! 118: .fi ! 119: .PP ! 120: The procedure \fIginit()\fR must be called to initialize ! 121: global constants and set window attributes at the start of ! 122: any program using \fIgpack\fR. ! 123: Procedures that are marked `internal' are intended ! 124: primarily for internal use by \fIgpack\fR. ! 125: Some procedures are generators that reverse their effects. ! 126: .SH SEE ALSO ! 127: worm(6) ! 128: .SH DEFICIENCIES ! 129: Object clipping has not been implemented. ! 130: \*Mradius\fR is not scaled for \*Mcircle\fR and \*Marc\fR. ! 131: .SH AUTHOR ! 132: Stephen B. Wampler
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