visualpython-users

[Visualpython-users] game in python

[Zbigniew <ze...@in...>]

Hello.

I'm new to python at all.
Currently on studies we are learning python
and I've invented for myself subject to
write 3d snake game with visual.
It should be there:
http://free.art.pl/zeeball/snake3d.tar.bz2
or
http://zeeball.w.interia.pl/bin/snake3d.tar.bz2
It's almost ready so now I ask more advanced
users for betatesting, bugfixing,
optimising and so on...
There is also strange bug I'm looking for
in the game maybe somebody could help.

Thanks in advance.

Zbigniew Trzcionkowski <ze...@in...>

[Visualpython-users] game in python

[Zbigniew <ze...@in...>]

Hello

I have fixed my game little bit,
now its playable however
there stills bug I'm looking for.
The game:
http://zeeball.w.interia.pl/bin/snake3d.tar.bz2
Am I on wrong maillist?

Zbigniew Trzcionkowski <ze...@in...>

Re: [Visualpython-users] game in python

[Bruce S. <Bru...@nc...>]

I tried to run the program, which has some very nice visual effects. 
However, there are no instructions on how to play the game, so I don't 
know what to do with it.

In the program file there is this comment:

# bugs: due to unknown reasons sometimes
#       box in the middle of snake's body seem
#       to disappear and some other strange things
#       happen

I've not seen a snake (since I don't know how to play the game), and 
this bug description isn't adequate for knowing what to look for. If you 
would like help in debugging this promising program, please explain how 
to play the game, and also give more details on what bugs you see.

Bruce Sherwood

Zbigniew wrote:

> Hello
> 
> I have fixed my game little bit,
> now its playable however
> there stills bug I'm looking for.
> The game:
> http://zeeball.w.interia.pl/bin/snake3d.tar.bz2
> Am I on wrong maillist?
> 
> Zbigniew Trzcionkowski <ze...@in...>
> 
> 
> 
> 
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Re: [Visualpython-users] game in python

[Zbigniew <ze...@in...>]

> I tried to run the program, which has some very nice visual effects. 
> However, there are no instructions on how to play the game, so I don't 
> know what to do with it.

Thanks for contating I was afraid my mails
doesn't reach the list.
Snake game is known as box that we can control on 2d space
and it "eats" randomly appearing boxes.
This causes it growing and the game becomes more and more
difficult as if the head of the snake hits itself or bound of the
screen the game ends.
In this version it is done in 3d space so the flashing box
has to eat green box.
It is quite difficult to learn controls in 3d space,
but I couldn't invent anything better :(
The snake always moves from the depth of screen in user's direction,
and the space is rotated so that the direction of snake moving
changes.

The problem is that sometimes in the snake is missing
box. The other problem is that sometimes snake
does not eat the box (the collision isn't detected).

I know it will take some time to learn how it is done,
but of course I have two scrollers for thanks :)
The game can be of course exaple for python
as after getting mark I will not need it anymore.

regards and thanks

Zbigniew Trzcionkowski ze...@in...

Re: [Visualpython-users] game in python

[Andrew D. <dou...@la...>]

On Thu, 13 May 2004, Zbigniew wrote:

> I know it will take some time to learn how it is done,
> but of course I have two scrollers for thanks :)
> The game can be of course exaple for python
> as after getting mark I will not need it anymore.

It's worth noting that the program requires a "Matrix" module, which
is not part of a normal VPython Linux installation.

-- 
    Andy Dougherty		dou...@la...
    Dept. of Physics
    Lafayette College, Easton PA 18042

Re: [Visualpython-users] game in python

[Zbigniew <ze...@in...>]

> It's worth noting that the program requires a "Matrix" module, which
> is not part of a normal VPython Linux installation.

I didn't know.
Anybody could send me small matrix multiplication
routine in python?

Zbigniew Trzcionkowski <ze...@in...>

Re: [Visualpython-users] game in python

[Zbigniew <ze...@in...>]

Primarily, thank You all for patience.
Even people watching me playing had
problems to play snake3d themselves.
Seems I made not playable game,
therefore now I will ask more detailed
questions which may point me to improve
the game anyway:

1.
I have question concerning Linux.
The best scores of the game are kept
in a text file (it's enough to eat
one green box to check this).
Is there any problem with creation/accessing
the hi-score file?

2.
The game do require to rotate objects.
During making of the game I noticed that
rotate method doesn't affect the pos field.
Matrix module is used for hand written
rotation routines for the snake and green box.
Maybe there is better solution for this?

3.
The collision detection is done with
the pos field. The rotations of the
playfield are 90 degree (split in
phases to animate).
Pos coordinates of the boxes are used
to detect collisions and should be
integer numbers
(I assumed that 90 degree rotations transform
integer into integer).
I'm aware of the floats during roations therefore
I do float->int conversion.
I do it but sometimes the snake runs through
the green box and collision is not detected.
Code looks ok. Thats the major problem
I cannot solve and I came here with.
4.
The other problem is that sometimes after many
rotations there is missing box inside snake body.

Other questions:
1. Is there chance for sound module for python?
2. Is there chance for bitmap graphics support
   (I imagine it as a layer on the top of the 3d display).
   That would be also useful for teaching of the computer
   graphics (drawing lines, filtering images etc.)


Zbigniew Trzcionkowski <ze...@in...>

Re: [Visualpython-users] game in python

[Jonathan B. <jbr...@ea...>]

On Fri, 2004-05-14 at 06:04, Zbigniew wrote:

caveat, I haven't looked at any of your code.

> 3.
> The collision detection is done with
> the pos field. The rotations of the
> playfield are 90 degree (split in
> phases to animate).
> Pos coordinates of the boxes are used
> to detect collisions and should be
> integer numbers
> (I assumed that 90 degree rotations transform
> integer into integer).

This is probably not a valid assumption if you are using the built-in
rotate() function.

> I'm aware of the floats during roations therefore
> I do float->int conversion.
> I do it but sometimes the snake runs through
> the green box and collision is not detected.
> Code looks ok. Thats the major problem
> I cannot solve and I came here with.

All vectors are always floating-point values in VPython.  If you need to
truncate the precision to an integer type, you will probably need to
write your own round-to-nearest conversion routine since Python only
directly supports truncation of the decimal part.  See math.modf() for
some help here.

> 2. Is there chance for bitmap graphics support
>    (I imagine it as a layer on the top of the 3d display).
>    That would be also useful for teaching of the computer
>    graphics (drawing lines, filtering images etc.)

VPython doesn't support anything in screen coordinates except for
portions of the text object.  I'm doing some experiments with OpenGL
textures that may yield fruit in this area, but its way too early to
tell right now.

HTH,
Jonathan Brandmeyer

Re: [Visualpython-users] game in python

[Andrew W. <an...@ph...>]

On Fri, 14 May 2004 08:53:45 -0400, Jonathan Brandmeyer wrote:

>All vectors are always floating-point values in VPython.  If you need to
>truncate the precision to an integer type, you will probably need to
>write your own round-to-nearest conversion routine since Python only
>directly supports truncation of the decimal part.  See math.modf() for
>some help here.

I'd have thought the 'round' builtin would do just that. It returns a
float, but rounded to the specified number of decimal places (if the
optional number of decimal places is omitted), so int(round(x)) should
always be the nearest integer. 

Still, I'd test for collision by specifying a tolerance a bit more
explicitly - if pos2 and pos1 are both vectors, this is short and very
readable:

if abs(pos2 - pos1) < 0.01:
  handle_collision()

Andrew

Re: [Visualpython-users] game in python

[Zbigniew <ze...@in...>]

> optional number of decimal places is omitted), so int(round(x)) should
> always be the nearest integer. 

that's it!
I didn't notice how exactly int() function does work.
Thank  you all for the effort and  please forgive me
the problems I had with describing the problem I had.

>if abs(pos2 - pos1) < 0.01:
>  handle_collision()

thats also very good

The fixed game should be there:
http://zeeball.w.interia.pl/bin/snake3d.tar.bz2

I have added in comments short description of
the game. Let me know if anyone managed
to play that game with or without this description:

#    there is 3D space with green box and flashing box
#    the green box is the food for the snake
#    and the flashing box is head of the snake
#    the snake is always moving in in Z direction
#    therefore to navigate the snake we have to rotate
#    the whole space with arrow keys till the snake
#    collides with food

Once again big thanks!

Zbigniew Trzcionkowski <ze...@in...>

Re: [Visualpython-users] game in python

[Jonathan B. <jbr...@ea...>]

On Fri, 2004-05-14 at 09:28, Andrew Williams wrote:
> On Fri, 14 May 2004 08:53:45 -0400, Jonathan Brandmeyer wrote:
> 
> >All vectors are always floating-point values in VPython.  If you need to
> >truncate the precision to an integer type, you will probably need to
> >write your own round-to-nearest conversion routine since Python only
> >directly supports truncation of the decimal part.  See math.modf() for
> >some help here.
> 
> I'd have thought the 'round' builtin would do just that. It returns a
> float, but rounded to the specified number of decimal places (if the
> optional number of decimal places is omitted), so int(round(x)) should
> always be the nearest integer. 
> 
> Still, I'd test for collision by specifying a tolerance a bit more
> explicitly - if pos2 and pos1 are both vectors, this is short and very
> readable:
> 
> if abs(pos2 - pos1) < 0.01:
>   handle_collision()
> 
> Andrew


Of course, a built-in function.  I was only looking in the math module. 
Thanks for clearing this up.

-Jonathan Brandmeyer

Re: [Visualpython-users] game in python

[Bruce S. <Bru...@nc...>]

I don't understand this syntax. If pos2 and pos1 are intended to stand 
for something like box1.pos and box2.pos, positions of VPython objects, 
then what you need is mag(pos2-pos1), not abs(pos2-pos1).

Bruce Sherwood

Jonathan Brandmeyer wrote:

> On Fri, 2004-05-14 at 09:28, Andrew Williams wrote:
> 
>>On Fri, 14 May 2004 08:53:45 -0400, Jonathan Brandmeyer wrote:
>>
>>
>>>All vectors are always floating-point values in VPython.  If you need to
>>>truncate the precision to an integer type, you will probably need to
>>>write your own round-to-nearest conversion routine since Python only
>>>directly supports truncation of the decimal part.  See math.modf() for
>>>some help here.
>>
>>I'd have thought the 'round' builtin would do just that. It returns a
>>float, but rounded to the specified number of decimal places (if the
>>optional number of decimal places is omitted), so int(round(x)) should
>>always be the nearest integer. 
>>
>>Still, I'd test for collision by specifying a tolerance a bit more
>>explicitly - if pos2 and pos1 are both vectors, this is short and very
>>readable:
>>
>>if abs(pos2 - pos1) < 0.01:
>>  handle_collision()
>>
>>Andrew
> 
> 
> 
> Of course, a built-in function.  I was only looking in the math module. 
> Thanks for clearing this up.
> 
> -Jonathan Brandmeyer
> 
> 
> 
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Re: [Visualpython-users] game in python

[Andrew W. <an...@ph...>]

On Sat, 15 May 2004 21:36:07 -0400, Bruce Sherwood wrote:

>I don't understand this syntax. If pos2 and pos1 are intended to stand 
>for something like box1.pos and box2.pos, positions of VPython objects, 
>then what you need is mag(pos2-pos1), not abs(pos2-pos1).
>
>> On Fri, 2004-05-14 at 09:28, Andrew Williams wrote:
>>>
>>>if abs(pos2 - pos1) < 0.01:
>>>  handle_collision()

The 'abs' builtin does return the magnitude of a vector - I checked
before posting the email. It doesn't work for tuples, only visual's
vector types. I'd actually forgotten about the 'mag' function, but I
assume that _would_ work for tuples, as it'd auto-convert them into
vectors like all the other visual functions.

Andrew

Re: [Visualpython-users] game in python

[Jonathan B. <jbr...@ea...>]

On Sat, 2004-05-15 at 23:37, Andrew Williams wrote:
> On Sat, 15 May 2004 21:36:07 -0400, Bruce Sherwood wrote:
> 
> >I don't understand this syntax. If pos2 and pos1 are intended to stand 
> >for something like box1.pos and box2.pos, positions of VPython objects, 
> >then what you need is mag(pos2-pos1), not abs(pos2-pos1).
> >
> >> On Fri, 2004-05-14 at 09:28, Andrew Williams wrote:
> >>>
> >>>if abs(pos2 - pos1) < 0.01:
> >>>  handle_collision()
> 
> The 'abs' builtin does return the magnitude of a vector - I checked
> before posting the email.

This is undocumented behavior and should not be relied upon in the
future.


-Jonathan Brandmeyer

Re: [Visualpython-users] game in python

[Zbigniew <ze...@in...>]

> All vectors are always floating-point values in VPython.  If you need to
> truncate the precision to an integer type, you will probably need to
> write your own round-to-nearest conversion routine since Python only
> directly supports truncation of the decimal part.  See math.modf() for
> some help here.

Yes! That was the reason. I even don't need the Matrix
module now.
I can give it as example for Vpython.
Let me know what to change in the "shape" of the code.

> VPython doesn't support anything in screen coordinates except for
> portions of the text object.  I'm doing some experiments with OpenGL
> textures that may yield fruit in this area, but its way too early to
> tell right now.

Nice to know.

Zbigniew Trzcionkowski <ze...@in...>

Re: [Visualpython-users] game in python

[Bruce S. <Bru...@nc...>]

I think the question below wasn't addressed by anyone, so I'll give it a 
shot. There is an extremely extensive set of modules for Python, to do 
almost anything. This includes dealing with sound. In fact, I think the 
creator of Python, Guido van Rossum, himself contributed to the sound 
capabilities. I haven't used this machinery myself, though.

In the Python documentation, see section 14 (multimedia) of the "Library 
Reference" document.

Bruce Sherwood

Zbigniew wrote:

> Other questions:
> 1. Is there chance for sound module for python?

Re: [Visualpython-users] game in python

[Zbigniew <ze...@in...>]

> almost anything. This includes dealing with sound. In fact, I think the 
> creator of Python, Guido van Rossum, himself contributed to the sound 
> capabilities. I haven't used this machinery myself, though.
> In the Python documentation, see section 14 (multimedia) of the "Library 
> Reference" document.

yes. there is somekind of support for OSS
but this is system specific feature :(
I will look if something external exists.

when I am on subject of system specials:
label object can have font specified.
Names like Arial or Helvetica are
system specific.
Support for names known from CSS -- monospace,
serif, sans-serif would be interesting feature.

Windows question:
how to get rid of that black useless window
behind visual display (also Tkinter).
I know py2exe can generate non dos exe,
but how to achieve that on script level?

regards

Zbigniew Trzcionkowski <ze...@in...>

Re: [Visualpython-users] game in python

[Jonathan B. <jbr...@ea...>]

On Mon, 2004-05-17 at 11:26, Zbigniew wrote:

> Windows question:
> how to get rid of that black useless window
> behind visual display (also Tkinter).
> I know py2exe can generate non dos exe,
> but how to achieve that on script level?
> 
> regards
> 

Try using the pythonw.exe executable rather than python.exe.

HTH,
Jonathan Brandmeyer

Re: [Visualpython-users] game in python

[Zbigniew <ze...@in...>]

I wanted to thank You all for help.
At the following location You can find
mini page devoted to python including
the snake3d game:
http://www.zeeball.friko.pl/python/

regards

Zbigniew Trzcionkowski <ze...@in...>

[Visualpython-users] Re: game in python

[Zbigniew <ze...@in...>]

Below is code for 2d snake I wrote at the beginning.
This code was ok, but might be useful to find out
how the snake games are done.
In the 3d version I'm looking for somekind of bug
with collision detection. 

---

# snake 2d
# wersja 3.5.2004

from visual import *
from string import *
from random import *

skrin=display(width=640, height=480, range=30)
pozycjaX=0
pozycjaY=0
bok=15
kierunek=0
snake=[]
snake.append(box(pos=[pozycjaX,pozycjaY,0], width=0.8, height=0.8,
length=0.8))
klocX=0
klocY=0
while klocX==pozycjaX:
  klocX=randrange(-bok,bok)
while klocY==pozycjaY:
  klocY=randrange(-bok,bok)
kloc=box(pos=[klocX,klocY,0], width=0.8, height=0.8, length=0.8)
box(pos=[-bok-1,0,0],width=0.8, height=2*(bok+2), length=0.8)
box(pos=[bok+1,0,0], width=0.8, height=2*(bok+2), length=0.8)
box(pos=[0,bok+1,0], width=0.8, height=0.8, length=2*(bok+2))
box(pos=[0,-bok-1,0], width=0.8, height=0.8, length=2*(bok+2))
while 1:
  for i in range(0,10):
    rate(50)
    snake[len(snake)-1].color=[0.5+random(),0.5+random(),0.5+random()]
    if skrin.kb.keys:
      s = skrin.kb.getkey()
      if s=="right":
        kierunek=0
      if s=="left":
        kierunek=1
      if s=="up":
        kierunek=2
      if s=="down":
        kierunek=3
      break
  if kierunek==0:
    pozycjaX=pozycjaX+1
    if pozycjaX>bok:
      break
  if kierunek==1:
    pozycjaX=pozycjaX-1
    if pozycjaX<-bok:
      break
  if kierunek==2:
    pozycjaY=pozycjaY+1
    if pozycjaY>bok:
      break
  if kierunek==3:
    pozycjaY=pozycjaY-1
    if pozycjaY<-bok:
      break
  crash=0
  for i in range(0,len(snake)):
    if snake[i].pos[0]==pozycjaX and snake[i].pos[1]==pozycjaY:
      crash=1
  if crash==1:
    break
  snake.append(box(pos=[pozycjaX,pozycjaY,0], width=0.8, height=0.8,
length=0.8))
  temp=snake.pop(0)
  temp.visible=0
  if pozycjaX==klocX and pozycjaY==klocY:
    while klocX==pozycjaX:
      klocX=randrange(-bok,bok)
    while klocY==pozycjaY:
      klocY=randrange(-bok,bok)
    kloc.pos=[klocX,klocY,0]
    snake.append(box(pos=[pozycjaX,pozycjaY,0], width=0.8, height=0.8,
length=0.8))
label(text="game over")


Zbigniew Trzcionkowski <ze...@in...>