date and time created 83/06/27 14:16:29 by sam

SCCS-vsn: lib/libplot/t300s/line.c 4.1

diff --git a/usr/src/lib/libplot/t300s/line.c b/usr/src/lib/libplot/t300s/line.c
new file mode 100644 (file)
index 0000000..09486f9
--- /dev/null
+++ b/usr/src/lib/libplot/t300s/line.c
@@ -0,0 +1,45 @@
+#ifndef lint
+static char sccsid[] = "@(#)line.c     4.1 (Berkeley) %G%";
+#endif
+
+#include "con.h"
+line(x0,y0,x1,y1){
+       iline(xconv(xsc(x0)),yconv(ysc(y0)),xconv(xsc(x1)),yconv(ysc(y1)));
+       return;
+}
+cont(x0,y0){
+       iline(xnow,ynow,xconv(xsc(x0)),yconv(ysc(y0)));
+       return;
+}
+iline(cx0,cy0,cx1,cy1){
+       int maxp,tt,j,np;
+       char chx,chy,command;
+           float xd,yd;
+       float dist2(),sqrt();
+       movep(cx0,cy0);
+       maxp = sqrt(dist2(cx0,cy0,cx1,cy1))/2.;
+       xd = cx1-cx0;
+       yd = cy1-cy0;
+       command = COM|((xd<0)<<1)|(yd<0);
+       if(maxp == 0){
+               xd=0;
+               yd=0;
+       }
+       else {
+               xd /= maxp;
+               yd /= maxp;
+       }
+       inplot();
+       spew(command);
+       for (tt=0; tt<=maxp; tt++){
+               chx= cx0+xd*tt-xnow;
+               xnow += chx;
+               chx = abval(chx);
+               chy = cy0+yd*tt-ynow;
+               ynow += chy;
+               chy = abval(chy);
+               spew(ADDR|chx<<3|chy);
+       }
+       outplot();
+       return;
+}