Map Bug: Problem with ground plane, meshbox with spin

[F687/s]

Well, an semantics bug triggered a map which triggered a bzflag bug which triggered a bug report.

But anyway...

When I run the following bzfs code:

Code: Select all

meshbox
	name platform1
	position 0.0 0.0 15.0
	size 15.0 200.0 1.0
	spin 45.0 1.0 0.0 0.0
end

...the box ends up cutting through the ground plane, so it can be seen through the grass. My question is: should this happen? If this does not work on your machine, I can attach a screenshot of what happens on my machine.

Thanks for your help.

[JeffM]

The ground plane is not clipping, it never has been ( it's for speed reasons on software rendering systems). So yes it is "suposed" to happen. Don't make any geometry bellow Z 0.

[Peter]

Or you can have objects below z 0, but just add this code to stop it from happening...

Code: Select all

material
  name grass
  texture std_ground
end

meshbox
  position 0 0 0
  size 400 400 0.1 #change the 400's to fit your world size
  rotation 0
  matref grass
end

Note: You have to have "-sb" in your options otherwise you'll be spawning in the air.

[JeffM]

that does not solve the problem, it only masks it.
That is also very wastefull of faces.

[Tedius]

F687/S, you have a 200 unit long box and you are spinning it on the x-axis, like an airplane propellar. Perhaps you'd get the results you expect if you spun it on the z-axis like:

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   spin 45.0 0.0 0.0 1.0 

or alternatively, you may find it more easier to use the rotation parameter instead:

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   rotation 45.0 

[optic delusion]

/me chuckles knowingly. Wait until you try ((nested) spin) transformations. You are prabably better off moving to a full-fledged 3-D editor, right now.
Why wait?

[anomaly]

Try rotating the object first. Then position it. The order of transformations is important. Also as Tedius pointed out, the spin of 45 degrees is about the X axis and the Y length is 200 units. This will cause the object to rotate below the ground. Not sure what you're trying to end up with here.

Try looking at this:
http://kapsi.fi/jpa/stuff/bzw/transformations.php

[F687/s]

> F687/S, you have a 200 unit long box and you are spinning it on the x-axis, like an airplane propellar. Perhaps you'd
> get the results you expect if you spun it on the z-axis like:

I know that, and I did reset it to spin on the Z-axis after I found out what was wrong. My problem was whether the ground plane was supposed to clip it off (which it doesn't).

> /me chuckles knowingly. Wait until you try ((nested) spin) transformations.
> You are prabably better off moving to a full-fledged 3-D editor, right now.
> Why wait?

Do you mean Blender, or BZEdit?

Sorry this turned into a full-fledged discussion about object rotation.

[joevano]

Sorry this turned into a full-fledged discussion about object rotation.

No need to apologize, I am finding it interesting.