Befaco/src/PulseGenerator_4.hpp

#pragma once

#include "rack.hpp"


/** When triggered, holds a high value for a specified time before going low again */
struct PulseGenerator_4 {

	simd::float_4 remaining = simd::float_4::zero();

	/** Immediately disables the pulse */
	void reset() {
		remaining = simd::float_4::zero();
	}

	/** Advances the state by `deltaTime`. Returns whether the pulse is in the HIGH state. */
	inline simd::float_4 process(float deltaTime) {

		simd::float_4 mask = (remaining > simd::float_4::zero());

		remaining -= ifelse(mask, simd::float_4(deltaTime), simd::float_4::zero());
		return ifelse(mask, simd::float_4::mask(), simd::float_4::zero());
	}

	/** Begins a trigger with the given `duration`. */
	inline void trigger(simd::float_4 mask, float duration = 1e-3f) {
		// Keep the previous pulse if the existing pulse will be held longer than the currently requested one.
		simd::float_4 duration_4 = simd::float_4(duration);
		remaining = ifelse(mask & (duration_4 > remaining), duration_4, remaining);
	}
};