check if cable connected?

flawr · February 22, 2020, 3:41pm

Let’s say we are building a sequencer, that has an internal clock that we can adjust using a knob, and a clock input if we want to use the clock signal of another module. To know which source to use, is it possible to check whether a cable is connected to a given input?

Richie · February 22, 2020, 3:53pm

if (inputs[MY_INPUT].isConnected()) {
  ...

flawr · February 22, 2020, 3:58pm

thanks a lot!

Coirt · February 22, 2020, 4:22pm

You can also check if it is monophonic or polyphonic

if (inputs[...].isMonophonic()) {//returns channels == 1 true /false
  ...
}

if (inputs[...].isPolyphonic()) {//return channels > 1 true/false
  ...
}

github.com

VCVRack/Rack/blob/v1/include/engine/Port.hpp#L154


		this->channels = channels;
	}


	/** Returns the number of channels.
	If the port is disconnected, it has 0 channels.
	*/
	int getChannels() {
		return channels;
	}


	/** Returns whether a cable is connected to the Port.
	You can use this for skipping code that generates output voltages.
	*/
	bool isConnected() {
		return channels > 0;
	}


	/** Returns whether the cable exists and has 1 channel. */
	bool isMonophonic() {
		return channels == 1;
	}