--- layout: stdlib-reference --- # dst ## Description Helper for computing distance terms for lighting (obsolete). Use the subtraction operator '-' instead. ## Signature

vector<T, 4> dst<T>(
    vector<T, 4> x,
    vector<T, 4> y)
    where T : __BuiltinFloatingPointType;

## Generic Parameters #### T: [\_\_BuiltinFloatingPointType](../interfaces/0_builtinfloatingpointtype-029hm/index.html) ## Parameters #### x : [vector](../types/vector/index.html)\<[T](../types/vector/index.html#typeparam-T), 4\> #### y : [vector](../types/vector/index.html)\<[T](../types/vector/index.html#typeparam-T), 4\>