Use ?: to pick Stretch_scale_* value.
Mark bogosity as unlikely.
Cache vector subtraction.
Defer constructing rotation matrix.
Move uvl assignment into reusable lambda.
This also fixes clang build. btb reports that clang chokes on:
extern T t;
extern const T ct;
[]() {
if (a)
return ct;
return t;
}
with
error: return type 'vms_matrix' must match previous return type 'const vms_matrix' when lambda expression has unspecified explicit return type
Compiler failure report: d38dd0aeef (commitcomment-9909178)
291fc95fb1