我想使用一些点绘制3d曲面，我使用Surface3D绘制该曲面。 问题是Surface3D总是创建从曲面的起点和终点到原点（0,0）的随机线，但是原点在我的云点中不存在。
例如，我运行这段代码 main.qml
import QtQuick 2.1
import QtQuick.Controls 2.2
import QtQuick.Layouts 1.0
import QtDataVisualization 1.3
Rectangle {
id: mainview
width: 1024
height: 768
color: surfacePlot.theme.windowColor
Data {
id: surfaceData
}
Item {
id: surfaceView
width: mainview.width
height: mainview.height
anchors.top: mainview.top
anchors.left: mainview.left
ColorGradient {
id: surfaceGradient
ColorGradientStop { position: 0.0; color: "darkslategray" }
ColorGradientStop { id: middleGradient; position: 0.25; color: "peru" }
ColorGradientStop { position: 1.0; color: "red" }
}
Surface3D {
id: surfacePlot
width: surfaceView.width
height: surfaceView.height
//! [7]
theme: Theme3D {
type: Theme3D.ThemeStoneMoss
font.family: "STCaiyun"
font.pointSize: 35
colorStyle: Theme3D.ColorStyleRangeGradient
baseGradients: [surfaceGradient]
}
//! [7]
shadowQuality: AbstractGraph3D.ShadowQualityNone
selectionmode: AbstractGraph3D.SelectionSlice | AbstractGraph3D.SelectionItemAndRow
scene.activeCamera.cameraPreset: Camera3D.CameraPresetIsometricLeft
axisX.min: 0
axisX.max: 500
axisY.min: 20
axisY.max: 300
axisZ.min: 0
axisZ.max: 500
axisX.segmentCount: 10
axisX.subSegmentCount: 2
axisX.labelFormat: "%i"
axisZ.segmentCount: 10
axisZ.subSegmentCount: 2
axisZ.labelFormat: "%i"
axisY.segmentCount: 5
axisY.subSegmentCount: 2
axisY.labelFormat: "%i"
axisY.title: "Height"
axisX.title: "Latitude"
axisZ.title: "Longitude"
//! [5]
Surface3DSeries {
id: surfaceSeries
flatShadingEnabled: false
drawMode: Surface3DSeries.DrawSurface
ItemModelSurfaceDataProxy {
itemModel: surfaceData.model
rowRole: "longitude"
columnRole: "latitude"
yPosRole: "height"
}
}
}
}
}
Data.qml
import QtQuick 2.1
Item {
property alias model: dataModel
//! [0]
ListModel {
id: dataModel
ListElement{ longitude: 50; latitude: 200; height: 50; }
ListElement{ longitude: 50; latitude: 210; height: 53; }
ListElement{ longitude: 50; latitude: 220; height: 50; }
ListElement{ longitude: 50; latitude: 230; height: 51; }
ListElement{ longitude: 50; latitude: 240; height: 52; }
ListElement{ longitude: 50; latitude: 250; height: 54; }
ListElement{ longitude: 50; latitude: 260; height: 54; }
ListElement{ longitude: 50; latitude: 270; height: 51; }
ListElement{ longitude: 50; latitude: 280; height: 51; }
ListElement{ longitude: 50; latitude: 290; height: 51; }
ListElement{ longitude: 50; latitude: 300; height: 52; }
ListElement{ longitude: 50; latitude: 310; height: 50; }
ListElement{ longitude: 50; latitude: 320; height: 54; }
ListElement{ longitude: 50; latitude: 330; height: 54; }
ListElement{ longitude: 50; latitude: 340; height: 50; }
ListElement{ longitude: 50; latitude: 350; height: 54; }
ListElement{ longitude: 50; latitude: 360; height: 52; }
ListElement{ longitude: 50; latitude: 370; height: 50; }
ListElement{ longitude: 50; latitude: 380; height: 53; }
ListElement{ longitude: 50; latitude: 390; height: 54; }
ListElement{ longitude: 60; latitude: 400; height: 50; }
ListElement{ longitude: 60; latitude: 390; height: 50; }
ListElement{ longitude: 60; latitude: 380; height: 50; }
ListElement{ longitude: 60; latitude: 370; height: 51; }
ListElement{ longitude: 60; latitude: 360; height: 53; }
ListElement{ longitude: 60; latitude: 350; height: 52; }
ListElement{ longitude: 60; latitude: 340; height: 51; }
ListElement{ longitude: 60; latitude: 330; height: 53; }
ListElement{ longitude: 60; latitude: 320; height: 54; }
ListElement{ longitude: 60; latitude: 310; height: 51; }
ListElement{ longitude: 60; latitude: 300; height: 54; }
ListElement{ longitude: 60; latitude: 290; height: 53; }
ListElement{ longitude: 60; latitude: 280; height: 53; }
ListElement{ longitude: 60; latitude: 270; height: 52; }
ListElement{ longitude: 60; latitude: 260; height: 51; }
ListElement{ longitude: 60; latitude: 250; height: 54; }
ListElement{ longitude: 60; latitude: 240; height: 53; }
ListElement{ longitude: 60; latitude: 230; height: 51; }
ListElement{ longitude: 60; latitude: 220; height: 51; }
ListElement{ longitude: 60; latitude: 210; height: 54; }
ListElement{ longitude: 60; latitude: 200; height: 54; }
ListElement{ longitude: 60; latitude: 190; height: 50; }
ListElement{ longitude: 60; latitude: 180; height: 54; }
ListElement{ longitude: 60; latitude: 170; height: 50; }
ListElement{ longitude: 60; latitude: 160; height: 54; }
ListElement{ longitude: 60; latitude: 150; height: 53; }
ListElement{ longitude: 60; latitude: 140; height: 54; }
ListElement{ longitude: 60; latitude: 130; height: 50; }
ListElement{ longitude: 60; latitude: 120; height: 52; }
ListElement{ longitude: 60; latitude: 110; height: 50; }
ListElement{ longitude: 60; latitude: 100; height: 52; }
ListElement{ longitude: 60; latitude: 90; height: 50; }
ListElement{ longitude: 60; latitude: 80; height: 50; }
ListElement{ longitude: 60; latitude: 70; height: 51; }
ListElement{ longitude: 60; latitude: 60; height: 54; }
ListElement{ longitude: 60; latitude: 50; height: 52; }
ListElement{ longitude: 60; latitude: 40; height: 53; }
ListElement{ longitude: 60; latitude: 30; height: 54; }
ListElement{ longitude: 60; latitude: 20; height: 50; }
ListElement{ longitude: 60; latitude: 10; height: 50; }
ListElement{ longitude: 70; latitude: 0; height: 51; }
ListElement{ longitude: 70; latitude: 10; height: 52; }
ListElement{ longitude: 70; latitude: 20; height: 54; }
ListElement{ longitude: 70; latitude: 30; height: 52; }
ListElement{ longitude: 70; latitude: 40; height: 54; }
ListElement{ longitude: 70; latitude: 50; height: 51; }
ListElement{ longitude: 70; latitude: 60; height: 53; }
ListElement{ longitude: 70; latitude: 70; height: 50; }
ListElement{ longitude: 70; latitude: 80; height: 53; }
ListElement{ longitude: 70; latitude: 90; height: 54; }
ListElement{ longitude: 70; latitude: 100; height: 54; }
ListElement{ longitude: 70; latitude: 110; height: 54; }
ListElement{ longitude: 70; latitude: 120; height: 53; }
ListElement{ longitude: 70; latitude: 130; height: 53; }
ListElement{ longitude: 70; latitude: 140; height: 52; }
ListElement{ longitude: 70; latitude: 150; height: 52; }
ListElement{ longitude: 70; latitude: 160; height: 53; }
ListElement{ longitude: 70; latitude: 170; height: 52; }
ListElement{ longitude: 70; latitude: 180; height: 50; }
ListElement{ longitude: 70; latitude: 190; height: 51; }
ListElement{ longitude: 70; latitude: 200; height: 53; }
ListElement{ longitude: 70; latitude: 210; height: 54; }
ListElement{ longitude: 70; latitude: 220; height: 50; }
ListElement{ longitude: 70; latitude: 230; height: 51; }
ListElement{ longitude: 70; latitude: 240; height: 50; }
ListElement{ longitude: 70; latitude: 250; height: 54; }
ListElement{ longitude: 70; latitude: 260; height: 50; }
ListElement{ longitude: 70; latitude: 270; height: 50; }
ListElement{ longitude: 70; latitude: 280; height: 51; }
ListElement{ longitude: 70; latitude: 290; height: 53; }
ListElement{ longitude: 70; latitude: 300; height: 50; }
ListElement{ longitude: 70; latitude: 310; height: 53; }
ListElement{ longitude: 70; latitude: 320; height: 52; }
ListElement{ longitude: 70; latitude: 330; height: 51; }
ListElement{ longitude: 70; latitude: 340; height: 53; }
ListElement{ longitude: 70; latitude: 350; height: 51; }
ListElement{ longitude: 70; latitude: 360; height: 52; }
ListElement{ longitude: 70; latitude: 370; height: 51; }
ListElement{ longitude: 70; latitude: 380; height: 53; }
ListElement{ longitude: 70; latitude: 390; height: 54; }
ListElement{ longitude: 80; latitude: 400; height: 54; }
ListElement{ longitude: 80; latitude: 390; height: 52; }
ListElement{ longitude: 80; latitude: 380; height: 53; }
ListElement{ longitude: 80; latitude: 370; height: 51; }
ListElement{ longitude: 80; latitude: 360; height: 50; }
ListElement{ longitude: 80; latitude: 350; height: 52; }
ListElement{ longitude: 80; latitude: 340; height: 53; }
ListElement{ longitude: 80; latitude: 330; height: 52; }
ListElement{ longitude: 80; latitude: 320; height: 51; }
ListElement{ longitude: 80; latitude: 310; height: 53; }
ListElement{ longitude: 80; latitude: 300; height: 54; }
ListElement{ longitude: 80; latitude: 290; height: 53; }
ListElement{ longitude: 80; latitude: 280; height: 52; }
ListElement{ longitude: 80; latitude: 270; height: 54; }
ListElement{ longitude: 80; latitude: 260; height: 53; }
ListElement{ longitude: 80; latitude: 250; height: 50; }
ListElement{ longitude: 80; latitude: 240; height: 54; }
ListElement{ longitude: 80; latitude: 230; height: 50; }
ListElement{ longitude: 80; latitude: 220; height: 50; }
ListElement{ longitude: 80; latitude: 210; height: 52; }
ListElement{ longitude: 80; latitude: 200; height: 50; }
ListElement{ longitude: 80; latitude: 190; height: 50; }
ListElement{ longitude: 80; latitude: 180; height: 50; }
ListElement{ longitude: 80; latitude: 170; height: 51; }
ListElement{ longitude: 80; latitude: 160; height: 52; }
ListElement{ longitude: 80; latitude: 150; height: 53; }
ListElement{ longitude: 80; latitude: 140; height: 50; }
ListElement{ longitude: 80; latitude: 130; height: 51; }
ListElement{ longitude: 80; latitude: 120; height: 50; }
ListElement{ longitude: 80; latitude: 110; height: 52; }
ListElement{ longitude: 80; latitude: 100; height: 53; }
ListElement{ longitude: 80; latitude: 90; height: 54; }
ListElement{ longitude: 80; latitude: 80; height: 53; }
ListElement{ longitude: 80; latitude: 70; height: 50; }
ListElement{ longitude: 80; latitude: 60; height: 54; }
ListElement{ longitude: 80; latitude: 50; height: 53; }
ListElement{ longitude: 80; latitude: 40; height: 52; }
ListElement{ longitude: 80; latitude: 30; height: 50; }
ListElement{ longitude: 80; latitude: 20; height: 54; }
ListElement{ longitude: 80; latitude: 10; height: 50; }
ListElement{ longitude: 90; latitude: 0; height: 53; }
ListElement{ longitude: 90; latitude: 10; height: 52; }
ListElement{ longitude: 90; latitude: 20; height: 52; }
ListElement{ longitude: 90; latitude: 30; height: 53; }
ListElement{ longitude: 90; latitude: 40; height: 54; }
ListElement{ longitude: 90; latitude: 50; height: 52; }
ListElement{ longitude: 90; latitude: 60; height: 52; }
ListElement{ longitude: 90; latitude: 70; height: 54; }
ListElement{ longitude: 90; latitude: 80; height: 50; }
}
}
我想应该绘制一个薄表面，但是要绘制下面的表面 Result of running the above code,There are random lines to the origin point
任何人都可以解释为什么曲面的边缘和原点之间存在线条，如何消除它们吗？
谢谢！
