Hi Niki!
Yes I have, a well a Box2D for Python. Neither or Python extensions and
neither will be a permanent part of PyGame. There's already a cool physics
module part of PyGame, I'll try to see if we can extend it's API further.
/Peter
On 2008-10-14 (Tue) 10:59, niki wrote:
Peter Gebauer
Yo René!
Indeed, it would be nice to see a Python extension for this. I still think
it'd be nice to use Zhang Fan's wonderful code, it has the basic concepts
there, just needs that extra to become a collision testing library as well.
From what I understand from Zhang Fan the plan was to provide
Hello René.
The thing is, in a large world spanning 16000x1 pixels that will be a
huge mask. Even if I reduce the resolution of the mask alone it will be
either top inprecise or still too large.
I don't want to write for OpenGL alone even though the plan is to use OpenGL
as test output.
Hi Peter,
I'm so sorry that I'm very busy for my study affairs these days so I stopped
this project for a while. In fact, Non-rectangular shapes like circle and
polygon are what I've planed and want to finish it in the physics module. I
designed some basic interfaces of shape
Peter,
The idea isn't to make a mask of the entire world. You make a mask of
each individual Surface and provide the offset of where it is in the
world relative to the Surface you're checking collision with to the
Mask overlap functions. This is quite fast, even checking dozens of
objects
hi,
it'd be cool if we also had a good kdtree implementation for spatial
stuff too :) For cases when we had say 1000 objects or so.
note, the wikipedia entry has a basic implementation in python
http://en.wikipedia.org/wiki/Kd-tree
There's also some quadtree python code lying around if you
Nirav Patel wrote:
If the polygons are Surfaces or can be turned into Surfaces, they can
be turned into Masks to do pixel collision.
On Tue, Oct 7, 2008 at 11:21 AM, Peter Gebauer
[EMAIL PROTECTED] wrote:
Yep, but as I said, I need to find colliding polygons, not pixels.
Pixel collision
Hi again Nirav!
Yes, but the number of pixels involved makes it too time consuming.
Also, I'll be using OpenGL to render the polygons which means I have to copy
the pixels to RAM or use occlusion tests, neither of which are optimal.
/Peter
On 2008-10-07 (Tue) 15:03, Nirav Patel wrote:
Peter,
Hello Ian!
Nice code! I was thinking of exposing some of the code Zhang Fan wrote for
the physics engine, but as of yet it only handles rectangles.
There's plenty of code available on the net, but I feel reluctant to produce
yet another Python extension for PyGame. I'll continue to check for
hi,
Note, that you can find contact normals with the mask module. See mask example.
For some types of games, per pixel collision detection is fast enough.
It uses rect bounding boxes as a first pass, so mostly it's not much
slower than rect collision detection. Assuming you are working in 2d,
Hey Nirav!
Yep, but as I said, I need to find colliding polygons, not pixels.
/Peter
On 2008-10-06 (Mon) 12:05, Nirav Patel wrote:
Peter,
There are some new functions in SVN in the mask module. New ones
since 1.8.1 that could be useful for collision are:
Mask.overlap_mask - Returns a
Peter,
If the polygons are Surfaces or can be turned into Surfaces, they can
be turned into Masks to do pixel collision. Though, I may be
misunderstanding what you are trying to do.
Nirav
On Tue, Oct 7, 2008 at 11:21 AM, Peter Gebauer
[EMAIL PROTECTED] wrote:
Hey Nirav!
Yep, but as I said,
I once wrote a program which collides a point and a convex polygon,
returning a boolean result. http://pygame.org/project/649/ This project
uses it, for instance. It may be of help.Ian
Hey guys!
I've been looking around for various libraries that handle
intersection/colliding polygons/line segments, I'm just wondering if/when
there will be polygon shapes and additional collision testing functions
that can be used seemlessly with the old rect and mask libraries that
already
Peter,
There are some new functions in SVN in the mask module. New ones
since 1.8.1 that could be useful for collision are:
Mask.overlap_mask - Returns a mask of the overlapping pixels
Mask.draw - Draws a mask onto another
Mask.erase - Erases a mask from another
Mask.count - Returns the number
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