Subject: more SP2 woes

(This message is being sent to all CPSC 102 Sec 1 students )

Yet another diligent student sez:
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When running my plane program, part of my output reads

    dist to plane 2   -1.000
    hit point    0.000    0.000    0.000

when in the output posted online it reads

dist to plane 2   -1.000
hit point   4.000  -7.161   0.161
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Dr. Westall answers:

This has been a bad week for me!  My original test program
didn't have the "memset()" that reset the hit coords to 0.0.
I must have subsequently fixed it for the notes :-(

Anyhow, returning -1.0 is all that is necessary to report a
miss.  So if distance is -1.0 hit point is irrelevant and can
be ignored.

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