Initial commit

1 files changed, 105 insertions, 0 deletions

diff --git a/sys/gio/calcomp/ccppl.x b/sys/gio/calcomp/ccppl.x
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+++ b/sys/gio/calcomp/ccppl.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include <gki.h>
+include <gset.h>
+include	"ccp.h"
+
+# CCP_POLYLINE -- Set up a polyline.  The polyline is defined by the array of
+# points P, consisting of successive (x,y) coordinate pairs.  The first point
+# is not plotted unless it is the only point, but rather defines the start of
+# the polyline.  The remaining points define line segments to be drawn.
+
+procedure ccp_polyline (p, npts)
+
+short	p[ARB]			# points defining line
+int	npts			# number of points, i.e., (x,y) pairs
+
+pointer	pl, xseg,yseg
+int	i, curpl_pt, nsegpts
+int	len_p, segsize, lsize
+
+include	"ccp.com"
+
+begin
+	if (npts <= 0)
+	    return
+
+	len_p = npts * 2
+
+	# Keep track of number of drawing instructions since last frame clear.
+	g_ndraw = g_ndraw + 1
+
+	# Update polyline attributes if necessary.
+	pl = CCP_PLAP(g_cc)
+
+	if (CCP_LTYPE(g_cc) != PL_LTYPE(pl)) {
+	    call ccp_linetype (PL_LTYPE(pl))		# set g_ltype in ccp.com
+	    CCP_LTYPE(g_cc) = PL_LTYPE(pl)
+	}
+	if (CCP_WIDTH(g_cc) != PL_WIDTH(pl)) {
+	    if (GKI_UNPACKREAL(PL_WIDTH(pl)) < 1.5) {
+		CCP_WIDTH(g_cc) = GKI_PACKREAL(PL_SINGLE)
+	    } else 
+	        CCP_WIDTH(g_cc) = PL_WIDTH(pl)
+	}
+	if (CCP_COLOR(g_cc) != PL_COLOR(pl)) {
+	    call ccp_color (PL_COLOR(pl))
+	    CCP_COLOR(g_cc) = PL_COLOR(pl)
+	}
+
+	# If the overrides are on, or linetype is solid and linewidth is single,
+	# do simple move and draws:
+
+	if ((g_ltover && g_lwover) || (!g_lwover && g_lwtype == 'p') ||
+	    (g_ltype == GL_SOLID && CCP_WIDTH(g_cc) == GKI_PACKREAL(PL_SINGLE))
+	    || (g_ltover && CCP_WIDTH(g_cc) == GKI_PACKREAL(PL_SINGLE)) ||
+	    (g_ltype == GL_SOLID && g_lwover)) {
+
+	    if (g_lwtype == 'p') 
+		call newpen (PL_WIDTH(pl))
+
+	    call plot (XTRAN(p[1]), YTRAN(p[2]), CCP_UP)
+	    if (npts == 1) {
+		call plot (XTRAN(p[1]), YTRAN(p[2]), CCP_DOWN)
+	    } else {		# draw normally
+		do i = 3, len_p, 2 
+		    call plot (XTRAN(p[i]), YTRAN(p[i+1]), CCP_DOWN)
+	    }
+
+	    # Store maximum-x point plotted for a "newframe" in ccp_clear.
+	    do i = 1, len_p, 2
+		g_max_x = max (XTRAN(p[i]), g_max_x)
+
+
+	# Otherwise, must calculate individual segments of dashes and dots,
+	# keeping their lengths constant along polyline (ccp_calcseg), before 
+	# optionally simulating bold and drawing (ccp_drawseg):
+
+	} else {		# vector polyline; simulate linetype, linewidth
+
+	    segsize = SEGSIZE
+	    call malloc (xseg, segsize, TY_REAL)
+	    call malloc (yseg, segsize, TY_REAL)
+
+	    curpl_pt = 1
+	    lsize    = nint(GKI_UNPACKREAL(CCP_WIDTH(g_cc)))
+	    if (!g_ltover && (g_ltype >= GL_DASHED && g_ltype <= GL_DOTDASH)) {
+
+		while (curpl_pt <= npts) {
+		    call ccp_calcseg (p, npts, g_ltype, curpl_pt, segsize,
+		    		      xseg,yseg, nsegpts)
+		    call ccp_drawseg (Memr[xseg],Memr[yseg], nsegpts, lsize)
+		}
+
+	    } else {	# either (ltype override or solid line), not single wid.
+
+		call ccp_calcseg (p, npts, GL_SOLID, curpl_pt, segsize, xseg,
+		    yseg, nsegpts)
+		call ccp_drawseg (Memr[xseg],Memr[yseg], nsegpts, lsize)
+	    }
+
+	    call mfree (xseg, TY_REAL)
+	    call mfree (yseg, TY_REAL)
+	}
+
+end