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Circles in XOR mode [message #10571]

Fri, 12 December 1997 00:00

Mat Wilson
Messages: 1
Registered: December 1997

Junior Member

Hi,

I'm working on a Region of Interest (ROI) placement
tool for PET images. Our tool requires circular ROIs
which can be moved around, resized, added to and
removed from these images.

I've made circles by generating a set of points for
each circle and then use the PLOTS function. This
works fine in regular graphics mode, but in mode 6
(XOR mode) complete circles are not drawn. It seems
as though certain pixels are written to twice and
so do not appear in the final rendering of the
circle.

My question is, are there any circle-drawing routines
out there which draw complete circles in XOR mode?

Any help would be really appreciated.

Thanks!

Mat

______________________________________________
M a t h e w W W i l s o n

UBC/TRIUMF Positron Emission Tomography (PET)
Vancouver BC Canada
http://www.physics.ubc.ca/~pet

E-mail: mat@thetis.pet.med.ubc.ca
______________________________________________

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Circles in XOR mode

By: Mat Wilson on Fri, 12 December 1997 00:00

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