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Re: coordinates in threedimensional object graphics ? [message #45957 is a reply to message #45952]

Mon, 24 October 2005 09:31

Rick Towler
Messages: 821
Registered: August 1998

Senior Member

> I play around with object graphics and try to build a routine which is
> able to visualize 3d objects of different sizes in th same way.

XOBJVIEW does this. I believe there is an object-ified version
available from the RSI user contrib library which probably adds a good
bit of flexibility.

> When I define the viewplane_rect and the zclip of my view, everything
> works fine before I rotate the view. Then the coordinate system is not
> the coordinate system of the defined axes anymore.

I'm not sure exactly what your issues are. When you rotate the object
does it rotate out of the view?

> Is there an easy way to calculate the coordinates for viewplane_rect and
> zclip from the coordinates of the rotated axes ?

While there probably is a way to do this, you'd be working backwards.
It is best to think of the view as fixed and (unless you are "zooming")
the viewplane_rect as fixed. You operate on the objects contained
within the view, manipulating their transforms to yield the desired
results. So your question is regarding transforming your models in some
way. Maybe you can add some details.

-Rick

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[Message index]

		Re: coordinates in threedimensional object graphics ? By: Rick Towler on Mon, 24 October 2005 11:07
		Re: coordinates in threedimensional object graphics ? By: Klemens Barfus on Mon, 24 October 2005 10:24
		Re: coordinates in threedimensional object graphics ? By: Rick Towler on Mon, 24 October 2005 09:31
		Re: coordinates in threedimensional object graphics ? By: Klemens Barfus on Tue, 25 October 2005 01:35

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