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39
40#include "transform_p.h"
41
42#include <Qt3DCore/private/qchangearbiter_p.h>
43#include <Qt3DCore/qtransform.h>
44#include <Qt3DCore/private/qtransform_p.h>
45
46QT_BEGIN_NAMESPACE
47
48using namespace Qt3DCore;
49
50namespace Qt3DRender {
51namespace Render {
52
53Transform::Transform()
54 : BackendNode(ReadWrite)
55 , m_rotation()
56 , m_scale(1.0f, 1.0f, 1.0f)
57 , m_translation()
58{
59}
60
61void Transform::cleanup()
62{
63 m_rotation = QQuaternion();
64 m_scale = QVector3D();
65 m_translation = QVector3D();
66 m_transformMatrix = Matrix4x4();
67 QBackendNode::setEnabled(false);
68}
69
70Matrix4x4 Transform::transformMatrix() const
71{
72 return m_transformMatrix;
73}
74
75QVector3D Transform::scale() const
76{
77 return m_scale;
78}
79
80QQuaternion Transform::rotation() const
81{
82 return m_rotation;
83}
84
85QVector3D Transform::translation() const
86{
87 return m_translation;
88}
89
90void Transform::syncFromFrontEnd(const QNode *frontEnd, bool firstTime)
91{
92 const Qt3DCore::QTransform *transform = qobject_cast<const Qt3DCore::QTransform *>(object: frontEnd);
93 if (!transform)
94 return;
95
96 bool dirty = m_rotation != transform->rotation();
97 m_rotation = transform->rotation();
98 dirty |= m_scale != transform->scale3D();
99 m_scale = transform->scale3D();
100 dirty |= m_translation != transform->translation();
101 m_translation = transform->translation();
102
103 if (dirty || firstTime) {
104 updateMatrix();
105 markDirty(changes: AbstractRenderer::TransformDirty);
106 }
107
108 if (transform->isEnabled() != isEnabled())
109 markDirty(changes: AbstractRenderer::TransformDirty);
110
111 BackendNode::syncFromFrontEnd(frontEnd, firstTime);
112}
113
114void Transform::updateMatrix()
115{
116 QMatrix4x4 m;
117 m.translate(vector: m_translation);
118 m.rotate(quaternion: m_rotation);
119 m.scale(vector: m_scale);
120 m_transformMatrix = Matrix4x4(m);
121}
122
123} // namespace Render
124} // namespace Qt3DRender
125
126QT_END_NAMESPACE
127

source code of qt3d/src/render/backend/transform.cpp