87 lines
2.0 KiB
C++
87 lines
2.0 KiB
C++
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/.
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*/
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#include "GestureTap.hpp"
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using namespace std::chrono_literals;
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namespace OpenVulkano::Input
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{
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namespace
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{
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constexpr auto MAX_DURATION = 1s;
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constexpr float MAX_DISTANCE = 12.0f;
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constexpr float MAX_DISTANCE2 = MAX_DISTANCE * MAX_DISTANCE;
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}
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int GestureTap::GetTouchCount() const
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{
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return std::count_if(m_touchMap.begin(), m_touchMap.end(), [](const auto& t) { return t.second; });
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}
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void GestureTap::Cancel()
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{
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SetActive(false);
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m_tapInfo.position = {};
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}
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void GestureTap::Reset()
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{
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Cancel();
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m_touchMap.clear();
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m_startTime = {};
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}
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void GestureTap::TouchMoved(const Touch& touch)
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{
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if (IsActive())
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{
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if ((std::chrono::steady_clock::now() - m_startTime > MAX_DURATION) ||
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(Math::Utils::distance2(touch.GetPosition(), m_initialPoint) > MAX_DISTANCE2) ||
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((m_distance += Math::Utils::distance2(touch.GetPosition(), touch.GetLastPosition()) > 3 * MAX_DISTANCE2)))
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{
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Cancel();
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}
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}
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else
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{
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m_tapInfo.position = touch.GetPosition();
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}
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}
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void GestureTap::TouchDown(const Touch& touch)
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{
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m_touchMap[touch.GetId()] = true;
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if (1 == m_touchMap.size()) // single tap only
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{
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m_startTime = std::chrono::steady_clock::now();
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m_initialPoint = touch.GetPosition();
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m_distance = 0.0f;
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m_tapInfo.position = m_initialPoint;
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SetActive(true);
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}
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else
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{
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Cancel();
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}
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}
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void GestureTap::TouchUp(const Touch& touch)
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{
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m_touchMap[touch.GetId()] = false;
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if (IsActive())
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{
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m_tapInfo.duration = std::chrono::duration_cast<std::chrono::seconds>(std::chrono::steady_clock::now() - m_startTime);
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m_tapInfo.position = touch.GetPosition();
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if (m_tapInfo.duration <= MAX_DURATION)
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{
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OnTap.NotifyAll(this, m_tapInfo);
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}
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Cancel();
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}
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if (!GetTouchCount()) Reset(); // empty map if no touch
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}
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} |