[pygame] pgreloaded documentation moved to sphinx
Hi, those of you keeping an eye on pgreloaded will hopefully be delighted to hear that the XML documentation sources are now converted into reStructuredText to be used by the sphinx[0] documentation system (the system used by Python = 2.6). Using reStructuredText as intermediate format and sphinx as documentation system should ease the process of creating and writing a clean documentation without dealing too much with all the HTML and layout stuff. It's in an early stage for now and just performs some simple preprocessing, so the generated HTML is not all that shiny. Suggestions about the documenation structure, layout and design are greatly welcome (especially in conjunction with the proposed website redesign). [0] http://sphinx.pocoo.org/ Regards Marcus pgpWWXxPlM3Aj.pgp Description: PGP signature
[pygame] How to get text from a surface
Hi, I am loading an image into pygame.i am trying to get the text from the surface. I used pyTesser to read the text from a surface but if the font size of the text is less then 16, it doesn't give me back the correct text from the surface. Is there any other way to get the text from the pygame surface. Thanks, Sibtey
Re: [pygame] pgreloaded documentation moved to sphinx
Nice Hi, those of you keeping an eye on pgreloaded will hopefully be delighted to hear that the XML documentation sources are now converted into reStructuredText to be used by the sphinx[0] documentation system (the system used by Python = 2.6). Using reStructuredText as intermediate format and sphinx as documentation system should ease the process of creating and writing a clean documentation without dealing too much with all the HTML and layout stuff. It's in an early stage for now and just performs some simple preprocessing, so the generated HTML is not all that shiny. Suggestions about the documenation structure, layout and design are greatly welcome (especially in conjunction with the proposed website redesign). [0] http://sphinx.pocoo.org/ Regards Marcus
Re: [pygame] fast sqrt? and profiling
On Thu, Jan 22, 2009 at 3:28 AM, Jake b ninmonk...@gmail.com wrote: On Wed, Jan 21, 2009 at 11:11 AM, Casey Duncan ca...@pandora.com wrote: Others have made good suggestions about reducing the amount of work you do detecting collision (i.e., partitioning) and using complex numbers instead of euclid for 2d vectors. The latter made a big performance difference for me in a vector-heavy game I was working on. 1) How do you use complex(imaginary) numbers in place of euclid vectors? I tried searching for a tut/article, but, not having luck. Just use complex numbers as the standard data format for all your 2D vectors (positions, speeds, accelerations, directions ...) So you're making asteroids, you may have a spaceship that looks like this: class Spaceship: def __init__(self, pos, max_accel): self.pos = pos self.speed = 0j self.direction = 1j self.boosters_on = False self.max_accel = max_accel def update(self, dt): if self.boosters_on: self.speed += self.direction * self.max_accel * dt self.pos += self.speed * dt def render(self): screen_coords = self.pos.real, self.pos.imag # (Have somthing that draws the right sprite or polygon there) ... it's missing a lot of code, like turning the boosters on or off when you press buttons, turning (a bit more painful), and drawing, but you can at least see that the physics logic is pretty straightfoward, more than it would be if you were using tuples or something like that to represent vectors. Cheers, Emile
Re: [pygame] How to get text from a surface
Well, the problem you ran into is more like a problem of Optical Character Recognition (OCR) than a Pygame problem. Maybe you should look for better OCR algorithms. Which one are you currently using, by the way? -Thiago On Thu, Jan 22, 2009 at 11:33 AM, sibt...@infotechsw.com wrote: Hi, I am loading an image into pygame.i am trying to get the text from the surface. I used pyTesser to read the text from a surface but if the font size of the text is less then 16, it doesn't give me back the correct text from the surface. Is there any other way to get the text from the pygame surface. Thanks, Sibtey
Re: [pygame] Status of Iphone pygame?
Hey, hi Illume! There are already a few games on the iphone appstore made with Lua: http://www.idevgames.com/forum/showthread.php?t=15984 You are not supposed to download and run additional scripts, since that would bypass apple's controls, but (and IANAL) you can run scripts included in your app. cheers, -- alecu On Tue, Jan 20, 2009 at 23:38, René Dudfield ren...@gmail.com wrote: If you want to release it on the app store, you're not allowed to use python. I don't think anyone has been working on it. The SDL 1.3 port to iphone is in a semi-complete state. If you want to do an iphone game for the app store, best to use something else. On Wed, Jan 21, 2009 at 12:34 PM, Scott Beckstead scotthbeckst...@gmail.com wrote: Since Apple modified their non disclosure on the iphone has there been any change in the iphone availability. I have a game I need to port and I've been waiting for that to happen.
[pygame] Events and X
Hi guys! I was writing a quick test that use pygame.key.get_pressed, but had had no window and the keys won't get updated. After browsing the source code for the various event implementations under src/video and looking at the X11 code I realized that the code checks for a focused window before even processing events. Is it impossible to get the X11 input events without a window with the current implementation? Is it possible to get X11 input events without a window in the current X implementation at all? The svga implementation is using ioctl, but I don't really want to venture down that road and reimplement keyboard completely. /Peter
Re: [pygame] fast sqrt? and profiling
Still confused on the difference between complex and euclid.Vector2 [ doc: http://www.partiallydisassembled.net/euclid/vector-classes.html ] On Wed, Jan 21, 2009 at 9:24 PM, Casey Duncan ca...@pandora.com wrote: Here's some example code with some commonly used functions. Addition and subtraction are built into the complex type and work as expected (I use the real part So far, this looks like euclid.Vector2. Are you doing the same thing, only using 'real as the x component, and 'imag' as y? ( Meaning you are using complex instead of tuple, equivalent to using vector2 instead of tuple ? ) Or, I think i'm missing something. What is the advantage to to use this over euclid.Vector2? [ more below ] for x and the imaginary part for y). complex multiply can be used to rotate vectors: Does complex multiply behind the scenes do something like this? def rad2v(rad,mag=1.): # convert radians to vector with magnitude return mag*Vector2(cos(rad), sin(rad)) def v2rad(v): return atan2(v.y, v.x) # convert vector to radians def mod_angle(v,rad): # add radians to vector's orientation r = v2rad(v) r+=rad return rad2v( r, v.magnitude() ) v = rad2v( radians(142.8),2.5) # now equals: deg=142.8, mag=2.5, v=Vector2(-1.99, 1.51) v = mod_angle( v, radians(3.)) # now equals: deg=145.8, mag=2.5, v=Vector2(-2.07, 1.41) # 2D vectors using python complex numbers def radians(vector): return atan2(vector.imag, vector.real) def unit(radians): return cmath.exp(radians * 1j) def normal(vector): L = length(vector) if L == 0: return vector2() else: return vector / L def clamp(vector, max_length): L = length(vector) if L max_length: return vector * (max_length / L) else: return vector At first, this code looks the same, except there are new functions: .radians(v) and unit(r). Radians looks like a 'convert vector to euler radians angle'. But whatis .unit()? I'm guessing it's to create a new unit vector in the angle of 'radians.' But calling it with a few values, I'm not getting what I was expecting. Is it the equivalent of rad2v(r) for Vector2, but unit(r) does the same for complex numbers? def distance(vector1, vector2): return length(vector1 - vector2)This is good if the list may change during iteration. If you do this repeatedly in a given frame, it might be better to create a custom class (perhaps subclass set) that contains a stable set of the actors. When you add or remove, these are stored in ancillary sets rather than changing the stable set immediately. An update method called at the beginning of each frame adds and removes the items from the ancillary sets to update the stable set. These ancillary sets are then cleared. This mean less memory allocation/cleanup and work copying the lists class StableSet(set): I'll try it out. @emile: ( continued from above ), I'm trying to understand how/why complex numbers are used. Here is my Vector2 equivalent to your code. It looks like you treat complex same way I treat euclid.Vector2 ? Am I missing something? from euclid import Vector2 class Spaceship(): def __init__(self, pos=Vector2(0,0), max_accel=100): self.pos = pos self.vel = Vector2(0, 0) # or'speed'. changed named to not be confused as Scalar self.accel = Vector2(0, 1.) # or 'direction' self.boosters_on = False self.max_accel = max_accel def update(self, dt): if self.boosters_on: self.vel += self.accel * self.max_accel * dt self.pos += self.vel * dt -- Jake
Re: [pygame] Python 2.6
can't I get all of that with from __future__ import x ? --- On Wed, 1/21/09, Brian Fisher br...@hamsterrepublic.com wrote: From: Brian Fisher br...@hamsterrepublic.com Subject: Re: [pygame] Python 2.6 To: pygame-users@seul.org Date: Wednesday, January 21, 2009, 9:22 PM On Wed, Jan 21, 2009 at 6:53 PM, Yanom Mobis ya...@rocketmail.com wrote: Is there any good reason to switch to python 2.6, even though 2.5 is the supported python on my Linux distro? one good reason is because you want most of the goodness that you can get from 3.0 with very little of the breakage: http://docs.python.org/whatsnew/2.6.html nothing in particular there is worth it to me, personally.
Re: [pygame] Python 2.6
thanks. and about installing 2.5.4 over 2.5.2? --- On Wed, 1/21/09René Dudfield ren...@gmail.com wrote: From: René Dudfield ren...@gmail.com Subject: Re: [pygame] Python 2.6 To: pygame-users@seul.org Date: Wednesday, January 21, 2009, 9:15 PM hi, yeah, python 2.5 is the best python at the moment -- because it's more portable, and there are more libraries for it. Best not to overwrite your system python, as then it could break system tools. It seems new enough to use :) chairs, On Thu, Jan 22, 2009 at 1:53 PM, Yanom Mobis ya...@rocketmail.com wrote: Is there any good reason to switch to python 2.6, even though 2.5 is the supported python on my Linux distro? If I do stick with Python 2.5, is it safe to override python2.5.2 with python2.5.4 ( $ cd Python-2.5.4 ./configure make sudo make install )?
Re: [pygame] fast sqrt? and profiling
Oh, I guess they are pretty much equivalent, even though Casey seems to say complex have better performance than euclid. I just use complex because it's available out of the box with Python :) (and because I didn't know about Euclid; maybe I'll use it if I do 3D) On Thu, Jan 22, 2009 at 11:58 PM, Jake b ninmonk...@gmail.com wrote: Still confused on the difference between complex and euclid.Vector2 [ doc: http://www.partiallydisassembled.net/euclid/vector-classes.html ] On Wed, Jan 21, 2009 at 9:24 PM, Casey Duncan ca...@pandora.com wrote: Here's some example code with some commonly used functions. Addition and subtraction are built into the complex type and work as expected (I use the real part So far, this looks like euclid.Vector2. Are you doing the same thing, only using 'real as the x component, and 'imag' as y? ( Meaning you are using complex instead of tuple, equivalent to using vector2 instead of tuple ? ) Or, I think i'm missing something. What is the advantage to to use this over euclid.Vector2? [ more below ] for x and the imaginary part for y). complex multiply can be used to rotate vectors: Does complex multiply behind the scenes do something like this? def rad2v(rad,mag=1.): # convert radians to vector with magnitude return mag*Vector2(cos(rad), sin(rad)) def v2rad(v): return atan2(v.y, v.x) # convert vector to radians def mod_angle(v,rad): # add radians to vector's orientation r = v2rad(v) r+=rad return rad2v( r, v.magnitude() ) v = rad2v( radians(142.8),2.5) # now equals: deg=142.8, mag=2.5, v=Vector2(-1.99, 1.51) v = mod_angle( v, radians(3.)) # now equals: deg=145.8, mag=2.5, v=Vector2(-2.07, 1.41) # 2D vectors using python complex numbers def radians(vector): return atan2(vector.imag, vector.real) def unit(radians): return cmath.exp(radians * 1j) def normal(vector): L = length(vector) if L == 0: return vector2() else: return vector / L def clamp(vector, max_length): L = length(vector) if L max_length: return vector * (max_length / L) else: return vector At first, this code looks the same, except there are new functions: .radians(v) and unit(r). Radians looks like a 'convert vector to euler radians angle'. But whatis .unit()? I'm guessing it's to create a new unit vector in the angle of 'radians.' But calling it with a few values, I'm not getting what I was expecting. Is it the equivalent of rad2v(r) for Vector2, but unit(r) does the same for complex numbers? def distance(vector1, vector2): return length(vector1 - vector2) This is good if the list may change during iteration. If you do this repeatedly in a given frame, it might be better to create a custom class (perhaps subclass set) that contains a stable set of the actors. When you add or remove, these are stored in ancillary sets rather than changing the stable set immediately. An update method called at the beginning of each frame adds and removes the items from the ancillary sets to update the stable set. These ancillary sets are then cleared. This mean less memory allocation/cleanup and work copying the lists class StableSet(set): I'll try it out. @emile: ( continued from above ), I'm trying to understand how/why complex numbers are used. Here is my Vector2 equivalent to your code. It looks like you treat complex same way I treat euclid.Vector2 ? Am I missing something? from euclid import Vector2 class Spaceship(): def __init__(self, pos=Vector2(0,0), max_accel=100): self.pos = pos self.vel = Vector2(0, 0) # or'speed'. changed named to not be confused as Scalar self.accel = Vector2(0, 1.) # or 'direction' self.boosters_on = False self.max_accel = max_accel def update(self, dt): if self.boosters_on: self.vel += self.accel * self.max_accel * dt self.pos += self.vel * dt -- Jake
[pygame] surface.map_rgb() returns signed int, surfarray.array2d unsigned int
Hi, I am writing more unit tests for surfarray after completing the blit_array tests. Right now I am working on array2d. It would seem natural to compare the elements of an array returned by array2d with values returned by map_rgb for the surface used to create the array. But it is not that easy. map_rgb returns a signed integer. The array is unsigned. So, though the two numbers may represent the same pixel value, they cannot be directly compared for assertion tests. It also brings up another issue, shouldn't map_rgb be compatible with array2d and blit_array. How else would one format surface specific pixel values from Color values. So the question is, do I change map_rgb to return an unsigned value as a Python long? Would this break anything? Lenard -- Lenard Lindstrom le...@telus.net
