| Re: RENDER in PV CL 4.0 [message #755] |
Tue, 23 February 1993 16:06 |
baird
Messages: 4
Registered: September 1992
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Junior Member |
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Glenn,
I was just beating on the samething earlier this week and this is what I found found out. First off I was looking at voxel type data. I had a bytarr(256,100,100) with some ultrasonic data in it. I was first using volumn() and then passing it on to the render for ray tracing. I thought that this was to easy. Then came time to doing some view changes, transformation of the data, and some nuts-&-bolts type work. I found this was almost impossible using the render. So, I took the same data and this to i
t:
1) vol_pad()
Put zeros around my data
2) center_view,
Create !p.t in such a way my mother would be pleased.
3) vol_trans(data,266,!p.t)
data is the results from vol_pad,266 is my biggest dimensions, and !p.t
is my transformation matrix generated by center_view. This function does have
a bug in it that only is apparent for large data sets. On line 91 or so
dimsq = dim * dim. The variable dim is an integer so you get wrap around
in the bytes. I changes this line to be dimsq=float(dim)*float(dim) and
and all was well.
4) vol_rend()
There you go. The nuts and blots method.
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