shithub: etoys

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ptinpoly: fix colors and polygon countour.

--- a/ptinpoly.c

+++ b/ptinpoly.c

@@ -41,8 +41,9 @@

 {

 	poly->pts = realloc(poly->pts, ++poly->npts*sizeof(Point2));

 	poly->pts[poly->npts-1] = p;

-	poly->scrpts = realloc(poly->scrpts, poly->npts*sizeof(Point));

+	poly->scrpts = realloc(poly->scrpts, (poly->npts+1)*sizeof(Point));

 	poly->scrpts[poly->npts-1] = toscreen(p);

+	poly->scrpts[poly->npts] = poly->scrpts[0]; /* close the polygon */

 }

 Polygon*

@@ -58,9 +59,10 @@

 		poly->npts = 0;

 	}else{

 		poly->pts = pts;

-		poly->scrpts = malloc(npts*sizeof(Point));

+		poly->scrpts = malloc((npts+1)*sizeof(Point));

 		for(i = 0; i < npts; i++)

 			poly->scrpts[i] = toscreen(poly->pts[i]);

+		poly->scrpts[npts] = poly->scrpts[0]; /* close the polygon */

 		poly->npts = npts;

 	}

 	poly->push = polygonpush;

@@ -97,7 +99,7 @@

 {

 	pal[PCBg] = allocimage(display, UR, screen->chan, 1, DWhite);

 	pal[PCFg] = allocimage(display, UR, screen->chan, 1, DBlack);

-	pal[PCPoly] = allocimage(display, UR, screen->chan, 1, DPaleblue);

+	pal[PCPoly] = allocimage(display, UR, screen->chan, 1, DPalebluegreen);

 	pal[PCPolydark] = allocimage(display, UR, screen->chan, 1, DDarkblue);

 	pal[PCAux] = allocimage(display, UR, screen->chan, 1, DRed);

 }

@@ -122,8 +124,8 @@

 	lockdisplay(display);

 	draw(screen, screen->r, pal[PCBg], nil, ZP);

 	fillpoly(screen, thepoly->scrpts, thepoly->npts, 1, pal[PCPoly], ZP);

-	poly(screen, thepoly->scrpts, thepoly->npts, Enddisc, Enddisc, 1, pal[PCPolydark], ZP);

-	for(i = 0; i < thepoly->npts; i++)

+	poly(screen, thepoly->scrpts, thepoly->npts > 0? thepoly->npts+1: 0, Enddisc, Enddisc, 1, pal[PCPolydark], ZP);

+	for(i = 0; thepoly->npts > 0 && i < thepoly->npts+1; i++)

 		fillellipse(screen, thepoly->scrpts[i], 2, 2, pal[PCPolydark], ZP);

 	fillellipse(screen, toscreen(thepoint), 2, 2, pal[PCAux], ZP);

 	drawbanner();