Runtime-Sized Arrays
Runtime-sized arrays can only be used with storage buffer resources.
The runtime-sized array either covers the whole buffer, or is the last member of a struct that describes the whole buffer.
The element count is determined at runtime: it’s as large as it can be while still fitting within size of the buffer binding associated with the variable.
Use the arrayLength
builtin function to get the element count.
Runtime-sized arrays can be indexed, but can’t be passed around like other ordinary values.