Need to add drawing for sphere directions

[trevordblack]

Missing white board picture for possible sphere normal directions, see
InOneWeekend.html:794

[hollasch]

Hmmmm, that's a blank line in the middle of a code block at the current tip of the development branch. What's the surrounding text?

[trevordblack]

![Figure [normal-directions]: Possible directions for sphere surface-normal geometry](../images/fig.normal-possibilities.jpg)

I realized that 794 is in my current branch

[hollasch]

@trevordblack — can you sketch out a picture of what you're thinking of?

[trevordblack]

Ahahahahahahah, you can't make me fall for that!

But, I'll throw something together. I had a limnu account that lapsed. I'll try to draw something

[hollasch]

A picture of a paper sketch would be fine.

[trevordblack]

The plane should be a saturated cyan/teal.
The point of intersection a deep red.
The ray_in black
The normals a bright green

[trevordblack]

Shoulda gone to art school

[petershirley]

Figure fig.normal-possibilities.jpg checked into branch v3newfigures

[hollasch]

Fixed in #409