# XPCE: How to fill a path of lines and bezier curves? **URL:** \ **Category:** Help!\ **Tags:** xpce\ **Created:** [April 16, 2024, 10:46am UTC](https://swi-prolog.discourse.group/t/xpce-how-to-fill-a-path-of-lines-and-bezier-curves/7379 "2024-04-16T10:46:01Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![kwon-young](https://yyz2.discourse-cdn.com/free1/user_avatar/swi-prolog.discourse.group/kwon-young/32/4841_2.png) [@kwon-young](https://swi-prolog.discourse.group/u/kwon-young)\ **Post date:** [April 16, 2024, 10:46am UTC](https://swi-prolog.discourse.group/t/xpce-how-to-fill-a-path-of-lines-and-bezier-curves/7379/1 "2024-04-16T10:46:01Z")
Hello, I am currently trying to parse and draw [svg d path](https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/d#path) using prolog. I found that xpce can draw lines, bezier curves and arcs which are all the graphical components needed to draw the path. However, how would I fill such path ? I have found the [`path`](https://www.swi-prolog.org/packages/xpce/UserGuide/summary.html#class:path) class in xpce but I believe we can only draw a polyline or a smooth line with a list of points. Would it be possible to pass a list of `line/4` and `bezier_curve/4` instead ? Here is an example of a list of lines and bezier curves that I would like to fill : ```prolog bezier_curve(point(0,-39),point(200,133),point(0,29),point(73,133)) bezier_curve(point(200,133),point(314,38),point(266,133),point(314,96)) bezier_curve(point(314,38),point(96,-133),point(314,-46),point(208,-133)) bezier_curve(point(96,-133),point(0,-39),point(32,-133),point(0,-103)) line(0,-39,0,-39) ``` ---
**Author:** ![jan](https://yyz2.discourse-cdn.com/free1/user_avatar/swi-prolog.discourse.group/jan/32/4_2.png) [@jan](https://swi-prolog.discourse.group/u/jan)\ **Post date:** [April 16, 2024, 1:43pm UTC](https://swi-prolog.discourse.group/t/xpce-how-to-fill-a-path-of-lines-and-bezier-curves/7379/2 "2024-04-16T13:43:58Z")
> [@kwon-young](#): > > However, how would I fill such path ? I’m afraid you can’t, unless you can build the final shape from a number of things that can be filled each. Smooth paths use bezier curves (I think), so maybe you can combine arcs, smooth and non-smooth paths? ---
**Author:** ![kwon-young](https://yyz2.discourse-cdn.com/free1/user_avatar/swi-prolog.discourse.group/kwon-young/32/4841_2.png) [@kwon-young](https://swi-prolog.discourse.group/u/kwon-young)\ **Post date:** [April 16, 2024, 3:45pm UTC](https://swi-prolog.discourse.group/t/xpce-how-to-fill-a-path-of-lines-and-bezier-curves/7379/3 "2024-04-16T15:45:08Z")
> [@jan](#): > > Smooth paths use bezier curves (I think) Do you know if we can modify the control points of the bezier curves of smooth paths ? As a last resort, I suppose I could interpolate points from my curves and draw that. Although, that does not help with multi path shapes… By the way, I have stumbled upon the PceDraw program and I kind of love it 🙂 Is there a way to send a list of drawing commands to PceDraw ? I have read the `realize_drawing/2` from `library('draw/importpl')` but that does not draw inside PceDraw but in a simple device. ---
**Author:** ![jan](https://yyz2.discourse-cdn.com/free1/user_avatar/swi-prolog.discourse.group/jan/32/4_2.png) [@jan](https://swi-prolog.discourse.group/u/jan)\ **Post date:** [April 16, 2024, 7:11pm UTC](https://swi-prolog.discourse.group/t/xpce-how-to-fill-a-path-of-lines-and-bezier-curves/7379/4 "2024-04-16T19:11:08Z")
> [@kwon-young](#): > > Do you know if we can modify the control points of the bezier curves of smooth paths ? I don’t recall. Check the source 🙂 > [@kwon-young](#): > > Is there a way to send a list of drawing commands to PceDraw ? I do not think so. After all it is simply a device with objects displayed on it, so it should be ewasy enough to create a drawing from Prolog rather then through the UI. Enjoy 🙂