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50
51#include "entity.h"
52
53#include <QGuiApplication>
54
55#include <QPropertyAnimation>
56#include <QUrl>
57#include <QTimer>
58#include <Qt3DCore/QEntity>
59#include <Qt3DRender/QCamera>
60#include <Qt3DCore/QTransform>
61#include <Qt3DCore/qaspectengine.h>
62#include <Qt3DInput/QInputAspect>
63#include <Qt3DRender/QParameter>
64#include <Qt3DExtras/QCylinderMesh>
65#include <Qt3DRender/QRenderAspect>
66#include <Qt3DRender/QCameraSelector>
67#include <Qt3DExtras/QPhongMaterial>
68#include <Qt3DExtras/QForwardRenderer>
69#include <qmath.h>
70#include <Qt3DExtras/qt3dwindow.h>
71#include <Qt3DExtras/qfirstpersoncameracontroller.h>
72#include <Qt3DRender/QRenderSurfaceSelector>
73#include <Qt3DRender/QCameraSelector>
74#include <Qt3DRender/QViewport>
75#include <Qt3DRender/QNoDraw>
76#include <Qt3DRender/QDebugOverlay>
77
78using namespace Qt3DCore;
79using namespace Qt3DRender;
80
81int main(int ac, char **av)
82{
83 QGuiApplication app(ac, av);
84 Qt3DExtras::Qt3DWindow view;
85
86 // FrameGraph
87 {
88 QRenderSurfaceSelector *surfaceSelector = new QRenderSurfaceSelector();
89 QCameraSelector *cameraSelector = new Qt3DRender::QCameraSelector(surfaceSelector);
90 cameraSelector->setCamera(view.camera());
91 QClearBuffers *clearBuffers = new Qt3DRender::QClearBuffers(cameraSelector);
92 clearBuffers->setClearColor(QColor(Qt::gray));
93 clearBuffers->setBuffers(QClearBuffers::ColorDepthBuffer);
94 new QNoDraw(clearBuffers);
95
96 const QRectF viewports[] = {
97 {0.0f, 0.0f, 0.25f, 0.25f},
98 {0.25f, 0.0f, 0.25f, 0.25f},
99 {0.5f, 0.0f, 0.25f, 0.25f},
100 {0.75f, 0.0f, 0.25f, 0.25f},
101 {0.0f, 0.25f, 0.25f, 0.25f},
102 {0.25f, 0.25f, 0.25f, 0.25f},
103 {0.5f, 0.25f, 0.25f, 0.25f},
104 {0.75f, 0.25f, 0.25f, 0.25f},
105 {0.0f, 0.5f, 0.25f, 0.25f},
106 {0.25f, 0.5f, 0.25f, 0.25f},
107 {0.5f, 0.5f, 0.25f, 0.25f},
108 {0.75f, 0.5f, 0.25f, 0.25f},
109 {0.0f, 0.75f, 0.25f, 0.25f},
110 {0.25f, 0.75f, 0.25f, 0.25f},
111 {0.5f, 0.75f, 0.25f, 0.25f},
112 {0.75f, 0.75f, 0.25f, 0.25f},
113 };
114
115 for (const QRectF &vp : viewports) {
116 QViewport *viewport = new Qt3DRender::QViewport(cameraSelector);
117 viewport->setNormalizedRect(vp);
118 }
119
120 new QDebugOverlay(qobject_cast<Qt3DCore::QNode *>(object: cameraSelector->children().last()));
121
122 view.setActiveFrameGraph(surfaceSelector);
123 }
124
125
126 QEntity *root = new QEntity();
127
128 // Mesh
129 auto *mesh = new Qt3DExtras::QCylinderMesh(root);
130 mesh->setRings(50.0f);
131 mesh->setSlices(30.0f);
132 mesh->setRadius(2.5f);
133 mesh->setLength(5.0f);
134
135 // Material
136 auto phongMaterial = new Qt3DExtras::QPhongMaterial(root);
137 auto effect = phongMaterial->effect();
138
139 // Camera
140 QCamera *cameraEntity = view.camera();
141 cameraEntity->lens()->setPerspectiveProjection(fieldOfView: 45.0f, aspect: 16.0f/9.0f, nearPlane: 0.1f, farPlane: 1000.0f);
142 cameraEntity->setPosition(QVector3D(0, 250.0f, 50.0f));
143 cameraEntity->setUpVector(QVector3D(0, 1, 0));
144 cameraEntity->setViewCenter(QVector3D(0, 0, 0));
145
146 // For camera controls
147 Qt3DExtras::QFirstPersonCameraController *camController = new Qt3DExtras::QFirstPersonCameraController(root);
148 camController->setCamera(cameraEntity);
149
150 const double radius = 100.0;
151 const int max = 1000;
152 const double det = 1.0 / max;
153
154 // Scene
155 for (int i = 0; i < max; i++) {
156 Entity *e = new Entity(effect, root);
157 e->addComponent(comp: mesh);
158 const double angle = M_PI * 2.0 * double(i) * det * 10.;
159
160 e->setDiffuseColor(QColor(int(qFabs(v: qCos(v: angle)) * 255.0), 204, 75));
161 e->setPosition(QVector3D(float(radius * qCos(v: angle)),
162 float(-200.0 * i * det),
163 float(radius * qSin(v: angle))));
164 e->setTheta(30.0f * i);
165 e->setPhi(45.0f * i);
166
167 QPropertyAnimation *animX = new QPropertyAnimation(e, QByteArrayLiteral("theta"));
168 animX->setDuration(2400 * (i + 1));
169 animX->setStartValue(QVariant::fromValue(value: i * 30.0f));
170 animX->setEndValue(QVariant::fromValue(value: (i + 1) * 390.0f));
171 animX->setLoopCount(-1);
172 animX->start();
173
174 QPropertyAnimation *animZ = new QPropertyAnimation(e, QByteArrayLiteral("phi"));
175 animZ->setDuration(2400 * (i + 1));
176 animZ->setStartValue(QVariant::fromValue(value: i * 20.0f));
177 animZ->setEndValue(QVariant::fromValue(value: (i + 1) * 380.0f));
178 animZ->setLoopCount(-1);
179 animZ->start();
180 }
181
182 view.setRootEntity(root);
183 view.show();
184
185 if (app.arguments().contains(str: ("--bench")))
186 QTimer::singleShot(interval: 25 * 1000, context: &app, slot: &QCoreApplication::quit);
187
188 return app.exec();
189}
190

source code of qt3d/tests/manual/bigscene-cpp/main.cpp