[pygame] gsoc: pygamedraw - status update
Hello, I'd like to give you a short status report of the pygamedraw gsoc project. I've implemented the main class structure and basic drawing methods, so its already usable: # ... red = pygame2.Color(200, 0, 0) blue = pygame2.Color(0, 0, 200) my_pen = SolidPen(color=red) my_pen.width = 6 rect1 = pygame2.Rect(20, 60, 200, 150) my_pen.width = 1 my_pen.ellipse(screen, rect1) rect2 = pygame2.Rect(30, 20, 50, 80) my_pen.ellipse(screen, rect2, start=30, stop=250) my_pen.color = blue my_pen.fill = True my_pen.cirlce(screen, (150, 170), 60, stop=90) my_pen.fill = False points = [(20, 50), (60, 10), (70, 80)] my_pen.line(screen, points, closed=True) # ... This should be mostly self-explanatory. In comparison to the current draw module(s) you will notice that it is object oriented! Draw functions on module level are replaced by draw methods on class level. This is the main change that brings along some advantages and changes: 1.) possibility of inheritance This is a great new feature that allows it to manipulate the way of drawing without touching any shape algorithms. These are implemented in the Pen base class and work on a mask as intermediate. This mask is then passed to the Pen.render() method that does some preparation and then calls the Pen.draw() method that implements the actual drawing. So you just need to subclass Pen and overwrite one method (namely Pen.draw()) and have a completely new drawing behavior for all shapes. Of course there will be some default Pens that already implement the most common drawing methods. There are some screen shots of already implemented Pens at my blog: http://pygamedraw.wordpress.com/2010/06/02/from-mask-to-surface/ If you have any ideas for further Pen classes please tell me. 2.) shorter parameter lists Having a Pen object allows it to store general parameters as class attributes, so drawing methods take only a minimum of parameters. However, I plan to add a way to set these class attributes on method class, so if you don't like to write my_pen.width=1/2/... all the time, you could set it directly on method call (like with the current pygame.draw module): my_pen.rect(surf, rect, width=2). 3.) cleaner code I think this makes the code cleaner, more structured and more pythonic. A more complex example is included with the sourcecode: http://bitbucket.org/schlangen/pygamedraw/get/2c2c8b815137.zip or hg clone http://bitbucket.org/schlangen/pygamedraw Regards, Julian
Re: [pygame] gsoc: pygamedraw - status update
sweet as :)
Re: [pygame] gsoc: pygamedraw - status update
The module is looking very nice so far, I'm looking forward to using it =) Have you though about implementing the Pen class as an abstract class with the abc module? That would prevent Pen from being directly instantiated. On Thu, Jun 17, 2010 at 13:29, René Dudfield ren...@gmail.com wrote: sweet as :)
Re: [pygame] gsoc: pygamedraw - status update
Looking good. Lenard
Re: [pygame] gsoc: pygamedraw - status update
Hey, I have to agree with the other comments. it's really looking good so far! On 06/17/2010 06:05 PM, jug wrote: Hello, I'd like to give you a short status report of the pygamedraw gsoc project. I've implemented the main class structure and basic drawing methods, so its already usable: [...] If you have any ideas for further Pen classes please tell me. [...] Regards, Julian I just thought that it *might* be useful to have an attribute style or something like that which can be set to SOLID, DOTTED or DASHED in analogy to the css attribute border-style [1]. I don't think this is a top priority item but might be nice to have. keep up the good work //Lorenz [1] http://www.tizag.com/cssT/border.php
Re: [pygame] gsoc: pygamedraw - status update
Hey, I'm in need of some fast drawing functions that can correctly paint brush strokes... eg. if I draw a series of points 1px apart,with alpha, is it going to look like a bunch of overlapping circles, or is it going to look like a thick line of the correct alpha value? Also, these are implemented in pure Python? How fast are they? do they do a lot of work in Python or is most of it done in existing SDL code or something? And how can I test this out? Do I just install Pygame Reloaded and then add this to my project folder and import it? Thanks, -Luke On Thu, Jun 17, 2010 at 3:54 PM, Lorenz Quack d...@amberfisharts.com wrote: Hey, I have to agree with the other comments. it's really looking good so far! On 06/17/2010 06:05 PM, jug wrote: Hello, I'd like to give you a short status report of the pygamedraw gsoc project. I've implemented the main class structure and basic drawing methods, so its already usable: [...] If you have any ideas for further Pen classes please tell me. [...] Regards, Julian I just thought that it *might* be useful to have an attribute style or something like that which can be set to SOLID, DOTTED or DASHED in analogy to the css attribute border-style [1]. I don't think this is a top priority item but might be nice to have. keep up the good work //Lorenz [1] http://www.tizag.com/cssT/border.php
