blob: 43dff651c611cb1af2de970248da5a3cc05298e0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
// Copyright (C) 2019 Klaralvdalens Datakonsult AB (KDAB).
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "entityaccumulator_p.h"
#include "entityvisitor_p.h"
QT_BEGIN_NAMESPACE
namespace Qt3DRender {
namespace Render {
namespace {
class Accumulator : public EntityVisitor
{
public:
Accumulator(std::function<bool(Entity *)> predicate, NodeManagers *manager)
: EntityVisitor(manager)
, m_predicate(predicate)
{
}
EntityVisitor::Operation visit(Entity *entity) override {
if (m_predicate(entity))
m_entities << entity;
return Continue;
}
QList<Entity *> m_entities;
private:
std::function<bool(Entity *)> m_predicate;
};
}
EntityAccumulator::EntityAccumulator(NodeManagers *manager)
: m_manager(manager)
, m_predicate([](Entity*) { return true; })
{
}
EntityAccumulator::EntityAccumulator(std::function<bool (Entity *)> predicate, NodeManagers *manager)
: m_manager(manager)
, m_predicate(predicate)
{
}
/*!
* \internal
*
* Call this to traverse the scene graph and return all entities for
* which the predicate returns true.
*
* Can be useful to get all the entities that contain a specific type
* of component.
*/
QList<Entity *> EntityAccumulator::apply(Entity *root) const
{
Accumulator a(m_predicate, m_manager);
a.apply(root);
return a.m_entities;
}
} // namespace Render
} // namespace Qt3DRender
QT_END_NAMESPACE
|