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39
40#include "axisaccumulator_p.h"
41
42#include <Qt3DInput/qaxis.h>
43#include <Qt3DInput/private/inputmanagers_p.h>
44#include <Qt3DInput/private/qaxisaccumulator_p.h>
45
46QT_BEGIN_NAMESPACE
47
48namespace Qt3DInput {
49namespace Input {
50
51AxisAccumulator::AxisAccumulator()
52 : BackendNode(ReadWrite)
53 , m_sourceAxisId()
54 , m_sourceAxisType(QAxisAccumulator::Velocity)
55 , m_scale(1.0f)
56 , m_value(0.0f)
57 , m_velocity(0.0f)
58{
59}
60
61void AxisAccumulator::cleanup()
62{
63 QBackendNode::setEnabled(false);
64 m_sourceAxisId = Qt3DCore::QNodeId();
65 m_sourceAxisType = QAxisAccumulator::Velocity;
66 m_scale = 1.0f;
67 m_value = 0.0f;
68}
69
70void AxisAccumulator::setValue(float value)
71{
72 if (isEnabled() && value != m_value)
73 m_value = value;
74}
75
76void AxisAccumulator::setVelocity(float velocity)
77{
78 if (isEnabled() && velocity != m_velocity)
79 m_velocity = velocity;
80}
81
82void AxisAccumulator::syncFromFrontEnd(const Qt3DCore::QNode *frontEnd, bool firstTime)
83{
84 BackendNode::syncFromFrontEnd(frontEnd, firstTime);
85 const QAxisAccumulator *node = qobject_cast<const QAxisAccumulator *>(object: frontEnd);
86 if (!node)
87 return;
88
89 m_sourceAxisId = Qt3DCore::qIdForNode(node: node->sourceAxis());
90 m_sourceAxisType = node->sourceAxisType();
91 m_scale = node->scale();
92
93 if (firstTime) {
94 m_value = 0.f;
95 m_velocity = 0.f;
96 }
97}
98
99void AxisAccumulator::stepIntegration(AxisManager *axisManager, float dt)
100{
101 Axis *sourceAxis = axisManager->lookupResource(id: m_sourceAxisId);
102 if (!sourceAxis)
103 return;
104
105 const float axisValue = sourceAxis->axisValue();
106 float newVelocity = 0.0f;
107 float newValue = 0.0f;
108 switch (m_sourceAxisType) {
109 case QAxisAccumulator::Velocity:
110 newVelocity = axisValue * m_scale;
111 newValue = m_value + newVelocity * dt;
112 break;
113
114 case QAxisAccumulator::Acceleration:
115 newVelocity = m_velocity + axisValue * m_scale * dt;
116 newValue = m_value + newVelocity * dt;
117 break;
118 }
119 setVelocity(newVelocity);
120 setValue(newValue);
121}
122
123} // namespace Input
124} // namespace Qt3DInput
125
126QT_END_NAMESPACE
127

source code of qt3d/src/input/backend/axisaccumulator.cpp