How do I rotate an object around specified axis?

[Ronak5]

Hi there,
I want to rotate an object around one axis and show it's 360 view..like 3d view.
Please help how can it be achieved. Thanks.

[koahnig]

@Ronak5

You need to give details on what you have already as starting point.

[Ronak5]

@koahnig
thanks for reply..so like I've a static car object/image which I want to rotate around it's centre continuously and show it's complete view.

[koahnig]

@Ronak5

What are the Qt classes you are using?

[J.Hilk]

@Ronak5
thats still not enough information. Is it a 2d canvas, an image, a 3d model etc.

I would suggest posting the qml code you use to display the non rotationg car.

[Ronak5]

@J.Hilk

Ok sure.. so it's just a whole image of a car with few image parts of the car like doors on it(as of now doors only). But yea it's just a image source.

Image {
    id: car1
    x: 500
    y: 160
    width: 293
    height: 330
    source: "car-1.png"
    opacity:1

    Image {
        id: door1
        x: -28
        y: 17
        width: 338
        height: 365
        visible: be.door1
        source: "door-1.png"
    }

    Image {
        id: door3
        x: -16
        y: 17
        width: 338
        height: 365
        visible: be.door3
        source: "door-3.png"
    }


    Image {
        id: door2
        x: -22
        y: -63
        width: 338
        height: 365
        visible:be.door2
        source: "door-2.png"
    }

    Image {
        id: door4
        x: -22
        y: -63
        width: 338
        height: 365
        visible: be.door4
        source: "door-4.png"
    }
}

[J.Hilk]

@Ronak5
ok,
all QtQuick items have a "rotation" property/function, you can see details here:
http://doc.qt.io/qt-5/qml-qtquick-rotation.html

should work for images as well,

but you won't be able to make a true 3d rotaion with 2d images

for that you would need to go into qt3d,

theres a "demo" by KDAB, here's a yt-link for that. Not sure if the source code is public available.
https://www.youtube.com/watch?v=zCBESbHSR1k

[Ronak5]

@J.Hilk
hey thanks a lot for the hints. So I had gone through the "rotation" property.
But with the explanation there, looks for each rotation tag it needs same image source everytime and output i get is multiple different rotated images.
What i was looking for specifically is infinitely rotating the image only.

And I've been going through 3d examples also, but got nothing concrete as of now. I'll go through the link posted above.
Please update if you could provide any more inputs here.
Appreciate your help. Thanks again.!

[J.Hilk]

@Ronak5
here's a very basic example (working) its with a rectangle, but its the same for an image

import QtQuick 2.9
import QtQuick.Window 2.2

Window {
    id:root
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    Rectangle{
        id: redRect

        anchors.centerIn: parent

        color: "red"

        height: Math.min(root.height, root.width) /3
        width:  height

    }

    Timer{
        id:rotateTimer

        interval: 20
        repeat: true
        running: true

        onTriggered: redRect.rotation = redRect.rotation + 1
    }
}

[Ronak5]

@J.Hilk

Oh, so you've used a timer here and just applied rotate on image. Wow! I never knew there's something like this could be done. This shall help atleast for 2d-rotation I believe. Thanks a lot man! This is something new I've learned today!