Using a point inside the polygon to start the Triangle Fan looked more intuitive to me when I first implemented this method. I guess this was because when you use an internal point to start, the resulting set of triangles looks like fan indeed. However, as pointed out by Slavomir Kaslev, the Triangle Fan can be started from any corner of the polygon. Suggested-by: Slavomir Kaslev <kaslevs@xxxxxxxxxx> Signed-off-by: Yordan Karadzhov (VMware) <y.karadz@xxxxxxxxx> --- src/libkshark-plot.c | 11 +---------- 1 file changed, 1 insertion(+), 10 deletions(-) diff --git a/src/libkshark-plot.c b/src/libkshark-plot.c index 32848b0..22a3e63 100644 --- a/src/libkshark-plot.c +++ b/src/libkshark-plot.c @@ -201,18 +201,9 @@ void ksplot_draw_polygon(const struct ksplot_point *points, return; } - /* Obtain a point inside the surface of the polygon. */ - struct ksplot_point in_point; - in_point.x = (points[0].x + points[2].x) / 2; - in_point.y = (points[0].y + points[2].y) / 2; - - /* - * Draw a Triangle Fan using the internal point as a central - * vertex. - */ + /* Draw a Triangle Fan. */ glBegin(GL_TRIANGLE_FAN); glColor3ub(col->red, col->green, col->blue); - glVertex2i(in_point.x, in_point.y); for (size_t i = 0; i < n_points; ++i) glVertex2i(points[i].x, points[i].y); -- 2.25.1
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