Thread: [Visualpython-users] confused

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visualpython-users

[Visualpython-users] confused

From: symion <sy...@pr...> - 2008-10-24 14:40:21

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<body bgcolor="#ffffff" text="#000000">
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I have been studying&nbsp;Vpython modules&nbsp;Text and Controls and I am a
little confused by the use of&nbsp; 'range'.<br>
The __init__ parameter list looks like this:<br>
<br>
def __init__(self, x=0, y=0, width=300, height=320,
range=100,title=None, foreground=None, background=None):<br>
<br>
Now RANGE is of course a keyword, but it is being used here as a
variable.<br>
<br>
Using IDLE 1.2.2 produces the following error.<br>
<br>
&gt;&gt;&gt; range=100<br>
&gt;&gt;&gt; range<br>
100<br>
&gt;&gt;&gt; for a in range(1,10):<br>
&nbsp;&nbsp;&nbsp; print a<br>
<br>
Traceback (most recent call last):<br>
&nbsp; File "&lt;pyshell#5&gt;", line 1, in &lt;module&gt;<br>
&nbsp;&nbsp;&nbsp; for a in range(1,10):<br>
TypeError: 'int' object is not callable<br>
<br>
Am I missing something?<br>
<br>
Also, I have cleaned up my&nbsp; <a
 href="http://home.primusonline.com.au/knoware/python/index.html">Web
page</a><a style="color: rgb(0, 0, 255);"
 href="http://home.primusonline.com.au/knoware/python/index.html"></a><br>
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[Visualpython-users] Line between two 3D points.

From: Doug M. <dou...@gm...> - 2008-10-26 21:52:29

Hi all,

What is the VPython code to draw a cylinder between two arbitrary 3D points?

I'm looking for an equivalent to the Windows GDI:
    line(x1, y1, x2, y2), but in 3d.

Maybe    Line(x1, y1, z1, x2, y2, z2)  or  Line(point1=(x,y,z), point2=(x,y,z))

It seems that I would have to calculate the angle vector between the two points and use that as the axis.

Then I would have to calculate the distance between the two points.

Is there an easier way?   Sample code would help too.

Thanks,
Doug Mair

Re: [Visualpython-users] Line between two 3D points.

From: Anders P. <an...@gm...> - 2008-10-26 22:20:47

Hello!

This is simple to to.
You need to write like this:
point1=(a,b,c)
point2=(x,y,z)
cylinder(pos=point1, axis=point2-point1)

Regards
/Anders Petersson


On Sun, Oct 26, 2008 at 10:40 PM, Doug Mair <dou...@gm...> wrote:

>  Hi all,
>
> What is the VPython code to draw a cylinder between two arbitrary 3D
> points?
>
> I'm looking for an equivalent to the Windows GDI:
>     line(x1, y1, x2, y2), but in 3d.
>
> Maybe    Line(x1, y1, z1, x2, y2, z2)  or  Line(point1=(x,y,z),
> point2=(x,y,z))
>
> It seems that I would have to calculate the angle vector between the two
> points and use that as the axis.
>
> Then I would have to calculate the distance between the two points.
>
> Is there an easier way?   Sample code would help too.
>
> Thanks,
> Doug Mair
>
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Re: [Visualpython-users] Line between two 3D points.

From: <bre...@un...> - 2008-10-26 22:48:56

I'm no expert, but wouldn't it be

cylinder(pos=(x1,y1,z1), axis=(x2-x1,y2-y1,z2-z1))

"Doug Mair" <dou...@gm...>
27/10/2008 08:40 AM

To
<vis...@li...>
cc

Subject
[Visualpython-users] Line between two 3D points.

Hi all,

What is the VPython code to draw a cylinder between two arbitrary 3D
points?

I'm looking for an equivalent to the Windows GDI:
line(x1, y1, x2, y2), but in 3d.

Maybe Line(x1, y1, z1, x2, y2, z2) or Line(point1=(x,y,z),
point2=(x,y,z))

It seems that I would have to calculate the angle vector between the two
points and use that as the axis.

Then I would have to calculate the distance between the two points.

Is there an easier way? Sample code would help too.

Thanks,
Doug Mair

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Re: [Visualpython-users] Line between two 3D points.

From: Jose A. M. H <jam...@fd...> - 2008-10-26 22:35:47

Hi Doug,

It is easier to use a curve between the points.

try it.

Hope this help,

bests,
jamh.
----- Original Message -----
From: Doug Mair
To: vis...@li...
Sent: Sunday, October 26, 2008 10:40 PM
Subject: [Visualpython-users] Line between two 3D points.

Hi all,

What is the VPython code to draw a cylinder between two arbitrary 3D points?

I'm looking for an equivalent to the Windows GDI:
line(x1, y1, x2, y2), but in 3d.

Maybe Line(x1, y1, z1, x2, y2, z2) or Line(point1=(x,y,z), point2=(x,y,z))

It seems that I would have to calculate the angle vector between the two points and use that as the axis.

Then I would have to calculate the distance between the two points.

Is there an easier way? Sample code would help too.

Thanks,
Doug Mair

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