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https://github.com/supleed2/ELEC60013-ES-CW2.git
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48 lines
1.2 KiB
C++
48 lines
1.2 KiB
C++
#include <knob>
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Knob::Knob(int minimum, int maximum) {
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Knob::minimum = minimum;
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Knob::maximum = maximum;
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Knob::A = false;
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Knob::B = false;
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Knob::rotPlusOnePrev = false;
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Knob::rotMinOnePrev = false;
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Knob::rotation = 0;
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}
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int Knob::getRotation() {
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return Knob::rotation;
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};
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void Knob::updateRotation(bool ANew, bool BNew) {
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bool rotPlusOneNew = (!B && !A && !BNew && ANew) ||
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(!B && A && BNew && ANew) ||
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(B && !A && !BNew && !ANew) ||
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(B && A && BNew && !ANew);
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bool rotMinOneNew = (!B && !A && BNew && !ANew) ||
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(!B && A && !BNew && !ANew) ||
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(B && !A && BNew && ANew) ||
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(B && A && !BNew && ANew);
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bool impossibleState = (!B && !A && BNew && ANew) ||
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(!B && A && BNew && !ANew) ||
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(B && !A && !BNew && ANew) ||
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(B && A && !BNew && !ANew);
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if (rotPlusOneNew || (impossibleState && rotPlusOnePrev))
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rotation += 2;
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if (rotMinOneNew || (impossibleState && rotMinOnePrev))
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rotation -= 2;
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if (rotation < minimum)
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rotation = minimum;
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if (rotation > maximum)
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rotation = maximum;
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A = ANew;
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B = BNew;
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if (!impossibleState) {
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rotPlusOnePrev = rotPlusOneNew;
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rotMinOnePrev = rotMinOneNew;
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}
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} |