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Object graphics axis [message #17482]

Fri, 22 October 1999 00:00

Karri Kaksonen
Messages: 27
Registered: October 1999

Junior Member

I just came back from Davids course about object graphics and it
occured to me that a reason why positioning the axis objects is
so difficult is that the range depends on the location of the
axis.

The manual says that the range of the axis is set by a vector:

[-Xmin/(Xmax-Xmin), 1/(Xmax-Xmin)]

This may work if the length of the axis is 1.0 in normalized
coordinates. In the course I chose the length to be 2.0 and in
order to get it right I just tried out different values until
I found it to be closer to:

[-1-Xmin*2/(Xmax-Xmin), 2/(Xmax-Xmin)]

I thought about this on my flight home last night and what I am
afraid of is that the -1 in the first element may actually depend
on where the axis is drawn on the screen. My location of the axis
was at [-1.0, -1.0]. If this is the case then RSI should do
something about it before version 5.3 comes out. Otherwise you have
to update the range vector every time you reposition the axis.

If somebody understands what is going on, please drop a line.

--
Regards,

Karri Kaksonen

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[Message index]

		Object graphics axis By: Karri Kaksonen on Fri, 22 October 1999 00:00
		Re: Object graphics axis By: Mark Hadfield on Sat, 30 October 1999 00:00
		Re: Object graphics axis By: Pavel Romashkin on Fri, 29 October 1999 00:00
		Re: Object graphics axis By: davidf on Fri, 29 October 1999 00:00
		Re: Object graphics axis By: James Tappin on Fri, 29 October 1999 00:00
		Re: Object graphics axis By: James Tappin on Fri, 29 October 1999 00:00

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