Attachment 144149 Details for Bug 110602 – Testcase Qt C++ program

Testcase Qt C++ program

mesa-issue-qt3d.cc (text/plain), 4.24 KB, created by Anssi Hannula on 2019-05-03 14:18:12 UTC

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Filename:

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Creator: Anssi Hannula

Created: 2019-05-03 14:18:12 UTC

Size: 4.24 KB

patch

obsolete

>/*
> * Use e.g. the following mesa-issue-qt3d.pro to build:
> * ---clip---
>TEMPLATE = app
>TARGET = mesa-issue-qt3d
>
>QT = core gui 3dcore 3drender 3dinput 3dextras opengl
>
>SOURCES += mesa-issue-qt3d.cc
> * ---clip---
> *  
> */
>
>#include <QGuiApplication>
>
>#include <Qt3DCore/QEntity>
>#include <Qt3DRender/QCamera>
>#include <Qt3DRender/QCameraLens>
>#include <Qt3DCore/QTransform>
>#include <Qt3DCore/QAspectEngine>
>
>#include <Qt3DInput/QInputAspect>
>
>#include <Qt3DExtras/QFirstPersonCameraController>
>
>#include <Qt3DRender/QRenderAspect>
>#include <Qt3DRender/QMesh>
>#include <Qt3DExtras/QPlaneMesh>
>#include <Qt3DExtras/QForwardRenderer>
>#include <Qt3DExtras/QPhongMaterial>
>#include <Qt3DExtras/QCylinderMesh>
>#include <Qt3DExtras/QSphereMesh>
>#include <Qt3DExtras/Qt3DWindow>
>#include <Qt3DRender/QPointLight>
>
>#include <Qt3DRender/QAttribute>
>#include <Qt3DRender/QBuffer>
>#include <Qt3DRender/QGeometry>
>#include <QPropertyAnimation>
>
>#include <QGLFormat>
>
>void drawLine(const QVector3D& start, const QVector3D& end, const QColor& color, Qt3DCore::QEntity *_rootEntity)
>{
>    auto *geometry = new Qt3DRender::QGeometry(_rootEntity);
>
>    // position vertices (start and end)
>    QByteArray bufferBytes;
>    bufferBytes.resize(3 * 2 * sizeof(float)); // start.x, start.y, start.end + end.x, end.y, end.z
>    float *positions = reinterpret_cast<float*>(bufferBytes.data());
>    *positions++ = start.x();
>    *positions++ = start.y();
>    *positions++ = start.z();
>    *positions++ = end.x();
>    *positions++ = end.y();
>    *positions++ = end.z();
>
>    auto *buf = new Qt3DRender::QBuffer(geometry);
>    buf->setData(bufferBytes);
>
>    auto *positionAttribute = new Qt3DRender::QAttribute(geometry);
>    positionAttribute->setName(Qt3DRender::QAttribute::defaultPositionAttributeName());
>    positionAttribute->setVertexBaseType(Qt3DRender::QAttribute::Float);
>    positionAttribute->setVertexSize(3);
>    positionAttribute->setAttributeType(Qt3DRender::QAttribute::VertexAttribute);
>    positionAttribute->setBuffer(buf);
>    positionAttribute->setByteStride(3 * sizeof(float));
>    positionAttribute->setCount(2);
>    geometry->addAttribute(positionAttribute); // We add the vertices in the geometry
>
>    // connectivity between vertices
>    QByteArray indexBytes;
>    indexBytes.resize(2 * sizeof(unsigned int)); // start to end
>    unsigned int *indices = reinterpret_cast<unsigned int*>(indexBytes.data());
>    *indices++ = 0;
>    *indices++ = 1;
>
>    auto *indexBuffer = new Qt3DRender::QBuffer(geometry);
>    indexBuffer->setData(indexBytes);
>
>    auto *indexAttribute = new Qt3DRender::QAttribute(geometry);
>    indexAttribute->setVertexBaseType(Qt3DRender::QAttribute::UnsignedInt);
>    indexAttribute->setAttributeType(Qt3DRender::QAttribute::IndexAttribute);
>    indexAttribute->setBuffer(indexBuffer);
>    indexAttribute->setCount(2);
>    geometry->addAttribute(indexAttribute); // We add the indices linking the points in the geometry
>
>    // mesh
>    auto *line = new Qt3DRender::QGeometryRenderer(_rootEntity);
>    line->setGeometry(geometry);
>    line->setPrimitiveType(Qt3DRender::QGeometryRenderer::Lines);
>    auto *material = new Qt3DExtras::QPhongMaterial(_rootEntity);
>    material->setAmbient(color);
>
>    // entity
>    auto *lineEntity = new Qt3DCore::QEntity(_rootEntity);
>    lineEntity->addComponent(line);
>    lineEntity->addComponent(material);
>}
>
>
>int main(int argc, char* argv[])
>{
>    QGuiApplication app(argc, argv);
>
>    Qt3DExtras::Qt3DWindow view;
>    view.show();
>
>    Qt3DCore::QEntity *scene = new Qt3DCore::QEntity;
>
>    drawLine(QVector3D(
>                 5.308311f *1000,-0.163387f*1000,0.616334f*1000
>                 ),
>              QVector3D(
>                  5.388281f*1000,-1.404217f*1000,0.671856f*1000
>                           ),QColor(Qt::red),scene
>              );
>
>    // Camera
>
>    Qt3DRender::QCamera *camera = view.camera();
>    camera->lens()->setPerspectiveProjection(45.0f, 16.0f/9.0f, 1.0f, 50000.0f);
>    camera->setPosition(QVector3D(-2000.0, -900, 2014.0 ));
>    camera->setUpVector(QVector3D(0.0,0.0,1.0 ));
>    camera->setViewCenter(QVector3D(4423.0, -62.0, 814.0));
>
>
>    view.setRootEntity(scene);
>    view.show();
>
>    return app.exec();
>}

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Attachments on bug 110602: 144147 | 144148 | 144149 | 144150 | 144171

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