QT 3D

Jafar VM

Hi ,
I am new to qt3d.i have a requirement like i need to load external 3d models(*.obj or *.stl) to a surface3d with xyz axis.

thanks in advance for any help

Jafar

oria66

Hi @Jafar-VM. Months ago I develop this single example trying to do it, and It works.

https://gitlab.com/homerooria/3d-model-rotation

I hope this helps you. If you have any doubt, don't hesitate to ask.

Good luck

Jafar VM

Hi ,

Thanks for ur help.

can we draw xyz axis along with that scene3d?

oria66

@Jafar-VM Yes, you can. In fact, the final version of the prototype I send you has an XYZ axis in the corner of the scene. But, unfortunately, it belongs to a commercial app.

Now that you know is possible, do you want to think over it and try by yourself? Or you want that I upload the code?

Clues:

Do a 3dmodel of an arrow.
Load it into your app and make three Entities.
Modify the rotation axis to fulfill your requirements.

If you have any doubts, don't hesitate to ask!!!!!

Good luck

Jafar VM

@oria66 it would be great if you could share the code.

thanks in advance

oria66

@Jafar-VM. Here there are the Entities. Enjoy!!!!

                    Entity{
                        id: axisManipulationEntity

                        Transform {
                            id: carTransform3
                            property real userAngle: 0.0


                            matrix: {
                                var m = Qt.matrix4x4();
                                m.rotate(userAngle, Qt.vector3d(0, 0, 1));
                                return m;
                            }
                        }

                        components: [ , , carTransform3]


                        Entity {
                            id: arrowZEntity

                            Mesh{
                                id:axisZ
                                source: "res/arrow.obj"
                            }

                            PhongMaterial{
                                id: zMaterial
                                ambient: Qt.rgba(0.0, 0.0, 1.0, 1.0)
                                diffuse: Qt.rgba(0.5, 0.5, 0.5, 1.0)
                                specular: Qt.rgba(0.5, 0.5, 0.5, 1.0)
                                shininess: 150.0
                            }

                            Transform {
                                id: arrowZTransform
                                property real userAngle: 0.0
                                property real x: 0
                                property real y: 0
                                property real z: 0

                                rotation: fromAxisAndAngle(Qt.vector3d(0, 1, 0), 0)

                                matrix: {
                                    var m = Qt.matrix4x4();
                                    m.rotate(userAngle, Qt.vector3d(0, 1, 0))
                                    m.translate(Qt.vector3d(x, y, z))
                                    return m;
                                }
                            }

                            components: [ axisZ, zMaterial, arrowZTransform]
                        }

                        Entity {
                            id: arrowXEntity

                            Mesh{
                                id:axisX
                                source: "res/arrow.obj"
                            }

                            PhongMaterial{
                                id: xMaterial
                                ambient: Qt.rgba(1.0, 0.0, 0.0, 1.0)
                                diffuse: Qt.rgba(0.5, 0.5, 0.5, 1.0)
                                specular: Qt.rgba(0.5, 0.5, 0.5, 1.0)
                                shininess: 150.0
                            }

                            Transform {
                                id: arrowXTransform
                                property real userAngle: 0.0
                                property real x: 0
                                property real y: 0
                                property real z: 0

                                rotation: fromAxisAndAngle(Qt.vector3d(0, 1, 0), 90)

                                matrix: {
                                    var m = Qt.matrix4x4();
                                    m.rotate(userAngle + 90, Qt.vector3d(0, 1, 0))
                                    m.translate(Qt.vector3d(x, y, z))
                                    return m;
                                }

                            }

                            components: [ axisX, xMaterial, arrowXTransform]
                        }

                        Entity {
                            id: arrowYEntity

                            Mesh{
                                id:axisY
                                source: "res/arrow.obj"
                            }

                            PhongMaterial{
                                id: yMaterial
                                ambient: Qt.rgba(0.0, 1.0, 0.0, 1.0)
                                diffuse: Qt.rgba(0.5, 0.5, 0.5, 1.0)
                                specular: Qt.rgba(0.5, 0.5, 0.5, 1.0)
                                shininess: 150.0
                            }

                            Transform {
                                id: arrowYTransform
                                property real userAngle: 0.0
                                property real x: 0
                                property real y: 0
                                property real z: 0

                                matrix: {
                                    var m = Qt.matrix4x4();
                                    m.rotate(-90, Qt.vector3d(1, 0, 0))
                                    m.translate(Qt.vector3d(x, y, z))
                                    return m;
                                }

                            }
                            components: [ axisY, yMaterial, arrowYTransform]
                        }

                    }

Good luck

Jafar VM

@oria66 hi,thanks for ur help.it worked out for me