64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
#include "StarInterpolationTracker.hpp"
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#include "StarRoot.hpp"
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#include "StarAssets.hpp"
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namespace Star {
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InterpolationTracker::InterpolationTracker(Json config) {
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if (config.isNull()) {
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config = JsonObject();
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} else if (config.type() == Json::Type::String) {
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auto assets = Root::singleton().assets();
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config = assets->json(config.toString());
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}
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m_interpolationEnabled = config.getBool("interpolationEnabled", false);
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m_entityUpdateDelta = config.getUInt("entityUpdateDelta", 3);
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m_stepLead = config.getUInt("stepLead", 0);
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m_extrapolationHint = config.getUInt("extrapolationHint", 0);
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m_stepTrackFactor = config.getDouble("stepTrackFactor", 1.0);
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m_stepMaxDistance = config.getDouble("stepMaxDistance", 0.0);
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m_currentStep = 0.0;
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}
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bool InterpolationTracker::interpolationEnabled() const {
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return m_interpolationEnabled;
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}
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unsigned InterpolationTracker::extrapolationHint() const {
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if (m_interpolationEnabled)
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return m_extrapolationHint;
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else
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return 0;
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}
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unsigned InterpolationTracker::entityUpdateDelta() const {
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return m_entityUpdateDelta;
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}
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void InterpolationTracker::receiveStepUpdate(double remoteStep) {
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m_lastStepUpdate = remoteStep;
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}
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void InterpolationTracker::update(double newLocalStep) {
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double dt = newLocalStep - m_currentStep;
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m_currentStep = newLocalStep;
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if (!m_predictedStep || !m_lastStepUpdate || dt < 0.0f) {
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m_predictedStep = m_lastStepUpdate;
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} else {
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*m_lastStepUpdate += dt;
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*m_predictedStep += dt;
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*m_predictedStep += (*m_lastStepUpdate - *m_predictedStep) * m_stepTrackFactor;
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m_predictedStep = clamp<double>(*m_predictedStep, *m_lastStepUpdate - m_stepMaxDistance, *m_lastStepUpdate + m_stepMaxDistance);
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}
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}
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float InterpolationTracker::interpolationLeadSteps() const {
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if (!m_interpolationEnabled || !m_predictedStep || !m_lastStepUpdate)
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return 0.0f;
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return *m_lastStepUpdate - *m_predictedStep + m_stepLead;
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}
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}
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