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
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
// Copyright (C) 2016 Klaralvdalens Datakonsult AB (KDAB).
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "scene.h"
#include <QtCore/QDebug>
#include <QtCore/QTimer>
#include <QtCore/QDateTime>
#include <QtGui/QPainter>
#include <Qt3DRender/QPaintedTextureImage>
#include <Qt3DRender/QTexture>
#include <Qt3DRender/QGeometryRenderer>
#include <Qt3DExtras/QCuboidMesh>
#include <Qt3DExtras/QDiffuseMapMaterial>
class MyTextureImage : public Qt3DRender::QPaintedTextureImage
{
public:
MyTextureImage(int w, int h)
{
setSize(QSize(w, h));
}
protected:
void paint(QPainter *painter) override
{
int w = painter->device()->width();
int h = painter->device()->height();
painter->setViewport(0, h, w, -h);
// clear to white
painter->fillRect(0, 0, w, h, QColor(255, 255, 255));
// draw some text
painter->setPen(QColor(255, 0, 0));
painter->setFont(QFont("Times", 30, QFont::Normal, true));
painter->drawText(w / 8, h / 6, QDateTime::currentDateTime().toString());
painter->setPen(QPen(QBrush(QColor(0, 0, 0)) ,10));
painter->setBrush(QColor(0, 0, 255));
// draw some circles
for (int i = 0; i < m_circleCount; i++) {
float r = w / 8.f;
float cw = 0.25 * w + 0.5 * h * (i % 2);
float ch = 0.375 * w + 0.375 * h * (i / 2);
painter->drawEllipse(QPointF(cw, ch), r, r);
}
m_circleCount = (m_circleCount % 4) + 1;
}
int m_circleCount = 1;
};
Scene::Scene(Qt3DCore::QEntity *rootEntity)
: m_rootEntity(rootEntity)
{
// Cuboid shape data
Qt3DExtras::QCuboidMesh *cuboid = new Qt3DExtras::QCuboidMesh();
// CuboidMesh Transform
m_transform = new Qt3DCore::QTransform();
m_transform->setScale(4.0f);;
// create texture
m_paintedTextureImage = new MyTextureImage(128, 128);
m_paintedTextureImage->update();
Qt3DRender::QTexture2D *tex = new Qt3DRender::QTexture2D();
tex->addTextureImage(m_paintedTextureImage);
Qt3DExtras::QDiffuseMapMaterial *mat = new Qt3DExtras::QDiffuseMapMaterial();
mat->setAmbient(QColor(64, 64, 64));
mat->setSpecular(QColor(255, 255, 255));
mat->setDiffuse(tex);
//Cuboid
m_cuboidEntity = new Qt3DCore::QEntity(m_rootEntity);
m_cuboidEntity->addComponent(cuboid);
m_cuboidEntity->addComponent(mat);
m_cuboidEntity->addComponent(m_transform);
QTimer *timer = new QTimer(this);
connect(timer, &QTimer::timeout, this, &Scene::updateTimer);
timer->start(50);
}
Scene::~Scene()
{
}
void Scene::redrawTexture()
{
m_paintedTextureImage->update();
}
void Scene::setSize(QSize size)
{
m_paintedTextureImage->setSize(size);
}
void Scene::updateTimer()
{
m_transform->setRotation(QQuaternion::fromAxisAndAngle(0, 1, 0, m_angle));
m_angle += 0.4f;
}
|
