Re: [Plib-devel] ssgaSpheres?

[Steve B. <sjb...@ai...>]

Bram Stolk wrote:

> As I said, the spheres are also visually wrong.
> If you render both styles, they have different sizes.
> And both sizes are also a mismatch against a sgSphere
> with radius 1, judging from the hits I get from sgIsect()
> (although this latter problem could be a bug in my isect program).

Ah - OK.

So it looks like there is a radius/diameter screwup somewhere in
ssgaSphere.

> This is clearly wrong. Changing topology of the sphere should
> not affect size. I also expect the mismatch against sgSphere.

Indeed.

> Also, you have to make a decision on the definition of ssgaSphere
> of size 1: do you want its radius to be 1, or its diameter?

The size of all of the ssgaShape's is supposed to be the overall
size - so it *should* be the diameter.

I have committed a fix for the sphere (there was also a problem
with the colour of the teapot that needed fixing).

I've added an example program for the ssgaShapes in examples/src/ssg/shapes

 > From what I'm seeing: neither sphere style has neither radius 1 nor
> diameter 1, judging from isects with sgSphere radius 1.

I don't know about the isect results - I have not checked that.

---------------------------- Steve Baker -------------------------
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