A few extended functions for GLSL do not clarify what should happen if given a scalar operand

[expenses]

The extension instructions in question are:

• Length - The documentation states:

  Result is the length of vector x, i.e., sqrt(x [0] 2 + x [1] 2 + …).'

  However, this is contradicted by the next lines, which imply that the result may also be a vector:

  The operand x must be a scalar or vector whose component type is floating-point.

  Result Type must be a scalar of the same type as the component type of x.

  Presumably, implementors implement the scalar version of this as abs(x)? This could be clarified.

• Distance - Same thing. Presumably this is implemented as abs(a - b)?

• Normalize - Also has contradictory docs:

  Result is the vector in the same direction as x but with a length of 1.

  The operand x must be a scalar or vector whose component type is floating-point.

  Result Type and the type of x must be the same type.

  From my testing on shadertoy, normalize(scalar) is just x / abs(x)?

[johnkslang]

• Length, yes it could probably say vector or scalar in both places. And, the formula is still correct: sqrt(x*x), which I'm sure many vendors could substitute abs(x) for.

• Distance: which part is not right? It's different in never claiming to only support vectors, right?

• Normalize: Like Length, could more clearly say scalar or vector in both places, but again the vector formula degenerates to the scalar formula, so there should not be an issue regarding that.