delta
nkrkv/pid/delta
Outputs a difference between the current `IN` value and its value at the moment of the last node update.
delta
@/delta
Outputs a difference between the current `IN` value and its value at the moment of the last node update.
INnumber
Input value
UPDpulse
Triggers a new update
RSTpulse
Resets the output difference to 0
OUTnumber
Difference between the current `IN` value and the value it has when the previous `UPD` was send. Can be positive or negative. Always equals to 0 on the first update.
C++ implementation
#pragma XOD dirtieness disable output_OUT
struct State {
Number prevValue = NAN;
};
{{ GENERATED_CODE }}
void evaluate(Context ctx) {
auto state = getState(ctx);
auto inValue = getValue<input_IN>(ctx);
// Emit 0 in case of reset or the very first update
auto outValue =
(isInputDirty<input_RST>(ctx) || isnan(state->prevValue))
? 0
: inValue - state->prevValue;
emitValue<output_OUT>(ctx, outValue);
state->prevValue = inValue;
}