我目前正在运行 QML（Qt 声明性语言）中的应用程序，运行版本为 5.15。 在应用程序中，我使用 QtLocation 和 mapboxgl 插件来显示使用 MapBox 图层和样式的地图。
我想要展示的是QML地图中的3D对象，因此我可以使用MapBox的功能、路由等
我尝试在以下代码中使用 Qt Quick 3D：
import QtQuick 2.15
import QtQuick.Window 2.15
import QtQuick.Controls 2.5
import QtPositioning 5.15
import QtLocation 5.15
import QtQuick.Layouts 1.3
import QtQuick3D 1.15
ApplicationWindow {
color: "white"
visibility: Window.FullScreen
visible: true
id: window
width: Screen.width
height: Screen.height
Map {
id: map
anchors.fill: parent
center: QtPositioning.coordinate(32.208574, 35.055456)
zoomLevel: 16
tilt: 40
bearing: 260
plugin: Plugin {
id: myPlugin
name: "mapboxgl"
PluginParameter {
name: "mapbox.access_token"
value: "TOKEN"
}
PluginParameter {
name: "mapboxgl.mapping.additional_style_urls";
value: "mapbox://styles/mapbox/outdoors-v12"
}
}
MapQuickItem {
id: mapItem
coordinate: QtPositioning.coordinate(32.208574, 35.055456) // Replace with your coordinates
sourceItem: Model {
id: model3D
source: "FinalBaseMesh.obj" // Replace with the path to your 3D model file
}
}
}
}
但是我收到一条错误消息：“无法将“Model”类型的对象分配给“QQuickItem*”类型的属性，因为前者既不与后者相同，也不是它的子类。”
我还尝试使用以下导入语句导入 Three.js：
import "https://unpkg.com/[email protected]/build/three.min.js" as Three并且出现类型错误，很可能是由于兼容性问题。 我曾尝试按照 https://docs.mapbox.com/mapbox-gl-js/example/add-3d-model/
上的 MapBox 教程进行操作此外，我还尝试使用现已弃用的 QtCanvas3D （以手机工作为例并尝试将其迁移到地图）以及 Qt 的 git 中的示例代码 我将 main.qml 更改为以下内容：
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCanvas3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of The Qt Company Ltd nor the names of its
** contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
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****************************************************************************/
import QtQuick 2.15
import QtQuick.Window 2.15
import QtLocation 5.15
import QtPositioning 5.15
Window {
property int initialWidth: 800
property int initialHeight: 600
id: mainView
width: initialWidth
height: initialHeight
visible: true
title: "Interactive Mobile Phone Demo"
color: "black"
//! [0]
Item {
id: textureSource
layer.enabled: true
layer.smooth: true
layer.textureMirroring: ShaderEffectSource.NoMirroring
//! [0]
anchors.centerIn: parent
// The dimensions of the texture source item determine the actual OpenGL texture dimensions.
// We want a fairly large texture, so that even the smallest text we use renders nicely.
width: 512
height: 1024
// Hide texture source behind the canvas normally, so you can't interact with it.
// It would also be possible to set visible property to false instead, but if the item
// is hidden, some things don't update correctly. For example, the Flickable doesn't update
// its content if it is not visible.
z: -2
// Specify transform to make the visual representation of the item match the size and
// orientation of the ui presented in Canvas. If the window initial dimensions,
// textureSource dimensions, or phone mesh dimensions or position are changed,
// scaling needs to be adjusted accordingly.
//! [2]
transform: [
Scale {
origin.y: textureSource.height / 2
origin.x: textureSource.width / 2
yScale: 0.5 * mainView.height / mainView.initialHeight
xScale: 0.5 * mainView.height / mainView.initialHeight
}
]
opacity: 0.0
//! [2]
// CellphoneApp implements the UI of the phone
CellphoneApp {
id: cellphoneApp
anchors.fill: parent
backgroundColor: "black"
textColor: "white"
onLocked: canvas3d.state = "running"
}
}
// CellphoneCanvas displays the rotating phone and the color selector
CellphoneCanvas {
id: canvas3d
anchors.fill:parent
textureSource: textureSource
onRotationStopped: {
cellphoneApp.resetLockTimer()
// Bring the UI to the foreground so that it can be interacted with
textureSource.z = 1
}
onRotationStarted: {
// Hide the texture source behind canvas to ensure UI cannot be
// interacted while the phone is rotating.
textureSource.z = -1
}
}
Map {
width: 200
height: 200
center: QtPositioning.coordinate(0,0)
plugin: Plugin {
id: myPlugin
name: "mapboxgl"
PluginParameter {
name: "mapbox.access_token"
value: "TOKEN"
}
PluginParameter {
name: "mapboxgl.mapping.additional_style_urls";
value: "mapbox://styles/mapbox/outdoors-v12"
}
}
MapQuickItem {
// Set the map item properties
coordinate: QtPositioning.coordinate(0,0)
//anchorPoint.x: dot.width * 0.5
//anchorPoint.y: dot.height
// Use the Canvas3D for rendering
sourceItem: canvas3d
}
}
ColorSelector {
anchors.right: parent.right
anchors.top: parent.top
width: parent.width / 16
onSelectedColorChanged: canvas3d.caseColor = selectedColor
}
// FPS display, initially hidden, clicking will show it
FpsDisplay {
anchors.left: parent.left
anchors.top: parent.top
width: 32
height: 64
//fps: canvas3d.fps
}
}
有没有人成功过？
我尝试使用两种可能的解决方案 - QtQuick3D 和 Three.js 在 QML 地图中显示 3D 对象，但是无法在应用程序中看到模型。
您有权访问的mapboxgl插件不支持3d模型。这意味着您只能通过 QtQuick Scenegraph 使用 mapboxgl Map {} 元素顶部的附加 Map{}（层）“自行”渲染模型。但是，由于 QtLocation 没有为您提供任何方法来执行此操作，因此您必须子类化 QDeclarativeGeoMapItemBase 并自己进行渲染。 我已经看到这样做了，但据我所知，github 上没有示例。