[Interest] [QT3d] Does anyone have any idea how to position a light in C++?

[Pierre Chicoine]

Oleg

Wow. Thank you. It works.

It was the setparent that made it work. That is, instead of placing it into
the Instantiation of the the entity class.

I'm using 5.7rc on Linux Kubuntu

Pierre

 // parent is the root entity

 Qt3DCore::QEntity * pLightEntity = new Qt3DCore::QEntity(); // hang off of root

 Qt3DRender::QPointLight * pQPointLight = new Qt3DRender::QPointLight();

 Qt3DCore::QTransform * pLightQTransform = new Qt3DCore::QTransform();

 pLightQTransform->setTranslation(QVector3D(0,0,300));

 LightEntity->addComponent(pLightQTransform);

 pLightEntity->addComponent(pQPointLight);

 pLightEntity->setParent(this); <<<< setting the parent last and this
way made it work. Thanks again





On Sat, Jun 11, 2016 at 5:47 AM, Oleg Evseev <ev.mipt at gmail.com> wrote:

> I've just tested following in my app instead of directional light sun
> entity and this works:
>
>
>     QEntity *en = new QEntity();
>
>     QPointLight *l = new QPointLight();
>
>     l->setColor("red");
>
>     Qt3DCore::QTransform *t = new Qt3DCore::QTransform();
>
>     t->setTranslation(QVector3D(15.0f, 0.0f, 0.0f));
>
>     en->addComponent(t);
>
>     en->addComponent(l);
>
>     en->setParent(this);
>
> I've tried to add this (my scene main entity) directly in entity creator and it is still works
> (but you could try set parent latter - there was bug in qt 3d relevant to this lately (before 5.7.0)).
>
> I use almost last commit 5.7.0 from git.
>
>
> --
> Regards, Oleg.
>
>
> 2016-06-11 15:09 GMT+03:00 Pierre Chicoine <pierrechicoine606 at gmail.com>:
>
>> Oleg
>>
>> Thanks for the reply.
>>
>> Here's the code I hung off of the root entity. Didn't work. Maybe I'm
>> translating from QML improperly. ??
>>
>>  // parent is the root entity
>>
>>  Qt3DCore::QEntity * pLightEntity = new Qt3DCore::QEntity(parent); // hang off of root
>>
>>
>>  Qt3DRender::QPointLight * pQPointLight = new Qt3DRender::QPointLight();
>>
>>  pLightEntity->addComponent(pQPointLight);
>>
>>  //pQPointLight->setColor(QColor::fromRgbF(1.0, 1.0, 1.0, 1.0));
>>
>>  //pQPointLight->setIntensity(4);
>>
>>  //pQPointLight->setEnabled(true);
>>
>>
>>  Qt3DCore::QTransform * pLightQTransform = new Qt3DCore::QTransform();
>>
>>  pLightEntity->addComponent(pLightQTransform);
>>
>>  pLightQTransform->setTranslation(QVector3D(0,0,300));
>>
>>
>>
>>
>> On Sat, Jun 11, 2016 at 4:11 AM, Oleg Evseev <ev.mipt at gmail.com> wrote:
>>
>>> Create new entity with transform and light components, add this entity
>>> to the root entity to light the whole scene. One light with one transform.
>>>
>>> Run the "lights" example and you'll understand the principle.
>>>
>>> Or you can "pack" several of such entities (with lights and theirs own
>>> transforms) into one entity (and add it to the root entity) with one
>>> transform to [strike]rule[/strike] transform them all simultaneously. It's
>>> up to you.
>>>
>>> I've not tested all of this, but this is how it works looking on
>>> examples.
>>>
>>> Regards, Oleg.
>>>
>>>
>>> 2016-06-11 14:01 GMT+03:00 Pierre Chicoine <pierrechicoine606 at gmail.com>
>>> :
>>>
>>>> With a point light, did you mean add a point light and transform to
>>>> every entity or to the root entity to light the whole scene with one
>>>> transform?
>>>>
>>>> Thanks for the reply Oleg.
>>>> On Jun 11, 2016 3:52 AM, "Oleg Evseev" <ev.mipt at gmail.com> wrote:
>>>>
>>>>> Do you mean point light?
>>>>> Example "lights" is not what are you looking for?
>>>>>
>>>>> This is in qml but obviously it is not so hard to write it in c++ just
>>>>> add components QTransform and QPointLight to the QEntity and it will work
>>>>> (I think).
>>>>>
>>>>> Regards, Oleg.
>>>>>
>>>>> 2016-06-11 13:43 GMT+03:00 Pierre Chicoine <
>>>>> pierrechicoine606 at gmail.com>:
>>>>>
>>>>>> Am I missing something simple. I can't seem to position a light in
>>>>>> QT3D
>>>>>> Any ideas anyone?
>>>>>>
>>>>>> _______________________________________________
>>>>>> Interest mailing list
>>>>>> Interest at qt-project.org
>>>>>> http://lists.qt-project.org/mailman/listinfo/interest
>>>>>>
>>>>>>
>>>>>
>>
>
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