On 07/10/2016 11:30 AM, William F Pokorny wrote:
> On 07/10/2016 08:37 AM, Le_Forgeron wrote:
...
> OK. If the optionality is what we are trying to indicate, I think we
> probably want something like :
>
> COLOR_VECTOR:
>       [rgb] float            | (promoted to 3 value vector)
>       [rg0] <2 Term Vector>  |
>       [rgb] <3_Term_Vector>  |
>       [rgbf] <4_Term_Vector> |
>       rgbt <4_Term_Vector>   |
>       [ rgbft ] <5_Term_Vector> |
>       srgb <3_Term_Vector>   |
>       srgbf <4_Term_Vector>  |
>       srgbt <4_Term_Vector>  |
>       srgbft <5_Term_Vector>
>
> Bill P.

Argh... Just popped into my head the line:

[rg0] <2 Term Vector>  |

is more like:

[rgb] <2 Term Vector>  | (blue is zero in this case)

there is of course no "rg0". :-)

Bill P.

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