🚀 go-pugleaf

sriram@brc.uconn.edu (Chittathoor M. Sriram) writes:


>Hi,
>	Could someone point me as to how I can draw Circles using 
>	the canvas provided operations. The Canvas class provided
>	methods for drawing Rectangles, Lines etc. 

>	I saw one method which said ::curve_to. It accepts 
>	6 parameters. But I am not sure what these signify or 
>	is there any other method I have to use.


This will draw a circle.  It is not very pretty for small circles, but it works.

        Coord dy = radius_ * 4/3;
        canvas->new_path();
        canvas->move_to(  x - radius_,  y );

        canvas->curve_to( x + radius_,  y,
                          x - radius_,  y + dy,
                          x + radius_,  y + dy );

        canvas->curve_to( x - radius_,  y,
                          x + radius_,  y - dy,
                          x - radius_,  y - dy );

        canvas->close_path();
        canvas->stroke( color_, brush_ );


>	Thanks for any pointers.

>Sriram

                                -Edwin (erijvor@cs.vu.nl)