On Sunday, 20 September 2020 at 15:52:49 UTC, realhet wrote:
On Sunday, 20 September 2020 at 14:54:09 UTC, Steven
Schveighoffer wrote:
On 9/20/20 9:30 AM, realhet wrote:
I managed to do the constant swizzles and it seems so elegant:
auto opDispatch(string def)() const
if(validRvalueSwizzle(def)) //making sure that only the few
thousand valid swizzles can pass through here
{
static if(def.startsWith('_')){ //if the swizzle definition
starts with a number
return opDispatch!(def[1..$]);
}else{
Vec!(CT, mixin(def.length)) res;
static foreach(i, ch; def)
res[i] = mixin(ch); // ch can be one of xyzw or rgba or
stpq or 0 or 1.
// just mix it in using the already
created lvalue swizzles of (integer consts 01)
return res;
}
}
I also have an idea that if I use capital letters, it shoud mean
negative components. This way importing a 3d vertex could be so
easy in compile time: rotated = original.xZy -> this is rotated
90 degrees around the x axis. Just need to add an uppercase check.
Never dared to go that far in compile time dlang stuff, and I
love it. :D Amazing language!
