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
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
// Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "entity.h"
#include <QGuiApplication>
#include <QPropertyAnimation>
#include <QUrl>
#include <QTimer>
#include <Qt3DCore/QEntity>
#include <Qt3DRender/QCamera>
#include <Qt3DCore/QTransform>
#include <Qt3DCore/qaspectengine.h>
#include <Qt3DInput/QInputAspect>
#include <Qt3DRender/QParameter>
#include <Qt3DExtras/QCylinderMesh>
#include <Qt3DRender/QRenderAspect>
#include <Qt3DRender/QGeometryRenderer>
#include <Qt3DRender/QCameraSelector>
#include <Qt3DExtras/QPhongMaterial>
#include <Qt3DExtras/QForwardRenderer>
#include <qmath.h>
#include <Qt3DExtras/qt3dwindow.h>
#include <Qt3DExtras/qfirstpersoncameracontroller.h>
#include <Qt3DRender/QRenderSurfaceSelector>
#include <Qt3DRender/QCameraSelector>
#include <Qt3DRender/QViewport>
#include <Qt3DRender/QNoDraw>
#include <Qt3DRender/QDebugOverlay>
using namespace Qt3DCore;
using namespace Qt3DRender;
int main(int ac, char **av)
{
QGuiApplication app(ac, av);
Qt3DExtras::Qt3DWindow view;
// FrameGraph
{
QRenderSurfaceSelector *surfaceSelector = new QRenderSurfaceSelector();
QCameraSelector *cameraSelector = new Qt3DRender::QCameraSelector(surfaceSelector);
cameraSelector->setCamera(view.camera());
QClearBuffers *clearBuffers = new Qt3DRender::QClearBuffers(cameraSelector);
clearBuffers->setClearColor(QColor(Qt::gray));
clearBuffers->setBuffers(QClearBuffers::ColorDepthBuffer);
new QNoDraw(clearBuffers);
const QRectF viewports[] = {
{0.0f, 0.0f, 0.25f, 0.25f},
{0.25f, 0.0f, 0.25f, 0.25f},
{0.5f, 0.0f, 0.25f, 0.25f},
{0.75f, 0.0f, 0.25f, 0.25f},
{0.0f, 0.25f, 0.25f, 0.25f},
{0.25f, 0.25f, 0.25f, 0.25f},
{0.5f, 0.25f, 0.25f, 0.25f},
{0.75f, 0.25f, 0.25f, 0.25f},
{0.0f, 0.5f, 0.25f, 0.25f},
{0.25f, 0.5f, 0.25f, 0.25f},
{0.5f, 0.5f, 0.25f, 0.25f},
{0.75f, 0.5f, 0.25f, 0.25f},
{0.0f, 0.75f, 0.25f, 0.25f},
{0.25f, 0.75f, 0.25f, 0.25f},
{0.5f, 0.75f, 0.25f, 0.25f},
{0.75f, 0.75f, 0.25f, 0.25f},
};
for (const QRectF &vp : viewports) {
QViewport *viewport = new Qt3DRender::QViewport(cameraSelector);
viewport->setNormalizedRect(vp);
}
new QDebugOverlay(qobject_cast<Qt3DCore::QNode *>(cameraSelector->children().last()));
view.setActiveFrameGraph(surfaceSelector);
}
QEntity *root = new QEntity();
// Mesh
auto *mesh = new Qt3DExtras::QCylinderMesh(root);
mesh->setRings(50.0f);
mesh->setSlices(30.0f);
mesh->setRadius(2.5f);
mesh->setLength(5.0f);
// Material
auto phongMaterial = new Qt3DExtras::QPhongMaterial(root);
auto effect = phongMaterial->effect();
// Camera
QCamera *cameraEntity = view.camera();
cameraEntity->lens()->setPerspectiveProjection(45.0f, 16.0f/9.0f, 0.1f, 1000.0f);
cameraEntity->setPosition(QVector3D(0, 250.0f, 50.0f));
cameraEntity->setUpVector(QVector3D(0, 1, 0));
cameraEntity->setViewCenter(QVector3D(0, 0, 0));
// For camera controls
Qt3DExtras::QFirstPersonCameraController *camController = new Qt3DExtras::QFirstPersonCameraController(root);
camController->setCamera(cameraEntity);
const double radius = 100.0;
const int max = 1000;
const double det = 1.0 / max;
// Scene
for (int i = 0; i < max; i++) {
Entity *e = new Entity(effect, root);
e->addComponent(mesh);
const double angle = M_PI * 2.0 * double(i) * det * 10.;
e->setDiffuseColor(QColor(int(qFabs(qCos(angle)) * 255.0), 204, 75));
e->setPosition(QVector3D(float(radius * qCos(angle)),
float(-200.0 * i * det),
float(radius * qSin(angle))));
e->setTheta(30.0f * i);
e->setPhi(45.0f * i);
QPropertyAnimation *animX = new QPropertyAnimation(e, QByteArrayLiteral("theta"));
animX->setDuration(2400 * (i + 1));
animX->setStartValue(QVariant::fromValue(i * 30.0f));
animX->setEndValue(QVariant::fromValue((i + 1) * 390.0f));
animX->setLoopCount(-1);
animX->start();
QPropertyAnimation *animZ = new QPropertyAnimation(e, QByteArrayLiteral("phi"));
animZ->setDuration(2400 * (i + 1));
animZ->setStartValue(QVariant::fromValue(i * 20.0f));
animZ->setEndValue(QVariant::fromValue((i + 1) * 380.0f));
animZ->setLoopCount(-1);
animZ->start();
}
view.setRootEntity(root);
view.show();
if (app.arguments().contains(("--bench")))
QTimer::singleShot(25 * 1000, &app, &QCoreApplication::quit);
return app.exec();
}
|
