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| ** Copyright (C) 2019 Klaralvdalens Datakonsult AB (KDAB). |
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| ** This file is part of the Qt3D module of the Qt Toolkit. |
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| |
| #include "scene.h" |
| |
| #include <QtCore/QDebug> |
| #include <QtCore/QTimer> |
| #include <QtCore/QDateTime> |
| |
| #include <Qt3DExtras/QCuboidMesh> |
| #include <Qt3DExtras/QDiffuseMapMaterial> |
| #include <Qt3DRender/QTextureDataUpdate> |
| #include <cstring> |
| |
| |
| 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_texture = new Qt3DRender::QTexture2D(); |
| m_texture->setWidth(512); |
| m_texture->setHeight(512); |
| m_texture->setFormat(Qt3DRender::QTexture2D::RGBA8_UNorm); |
| m_texture->setLayers(1); |
| m_texture->setGenerateMipMaps(false); |
| m_texture->setMinificationFilter(Qt3DRender::QTexture2D::Nearest); |
| m_texture->setMagnificationFilter(Qt3DRender::QTexture2D::Nearest); |
| |
| Qt3DExtras::QDiffuseMapMaterial *mat = new Qt3DExtras::QDiffuseMapMaterial(); |
| mat->setAmbient(QColor(64, 64, 64)); |
| mat->setSpecular(QColor(255, 255, 255)); |
| mat->setDiffuse(m_texture); |
| |
| //Cuboid |
| m_cuboidEntity = new Qt3DCore::QEntity(m_rootEntity); |
| m_cuboidEntity->addComponent(cuboid); |
| m_cuboidEntity->addComponent(mat); |
| m_cuboidEntity->addComponent(m_transform); |
| } |
| |
| Scene::~Scene() |
| { |
| } |
| |
| void Scene::run() |
| { |
| QTimer *timer = new QTimer(this); |
| connect(timer, &QTimer::timeout, this, &Scene::updateTimer); |
| timer->start(50); |
| } |
| |
| void Scene::updateTimer() |
| { |
| static int yPos = 0; |
| static uchar pixelValue = 255; |
| |
| m_transform->setRotation(QQuaternion::fromAxisAndAngle(0, 1, 0, m_angle)); |
| m_angle += 0.4f; |
| |
| QByteArray rawPixelData; |
| const int rows = 32; |
| rawPixelData.resize(512 * 4 * rows * sizeof(uchar)); |
| uchar *pixels = reinterpret_cast<uchar *>(rawPixelData.data()); |
| std::memset(pixels, pixelValue, 512 * rows * 4 * sizeof(uchar)); |
| |
| // QTextureImageData hold our raw content and size of subcontent |
| Qt3DRender::QTextureImageDataPtr imageData = Qt3DRender::QTextureImageDataPtr::create(); |
| imageData->setWidth(512); |
| imageData->setHeight(rows); |
| imageData->setMipLevels(1); |
| imageData->setLayers(1); |
| // We upload the 4 components of an RGBA pixel as 4 uchar |
| imageData->setPixelFormat(QOpenGLTexture::RGBA); |
| imageData->setPixelType(QOpenGLTexture::UInt8); |
| imageData->setFormat(QOpenGLTexture::RGBA8_UNorm); |
| imageData->setData(rawPixelData, 4, false); |
| |
| // QTextureDataUpdate references our updated content |
| // as well as x, y offsets where content needs to be uploaded |
| Qt3DRender::QTextureDataUpdate update; |
| update.setX(0); |
| update.setY(yPos); |
| update.setMipLevel(0); |
| update.setData(imageData); |
| // Send update to texture |
| m_texture->updateData(update); |
| |
| if (yPos + rows >= 512) |
| pixelValue = pixelValue > 0U ? 0U : 255U; |
| yPos = (yPos + rows) % 512; |
| |
| } |