How can I detect touch on Sprite3D?

cocos2d-x C++
#1

I want to know …
How can I detect touch down on Sprite3D?

#2

Sprites like almost everything in Cocos2d is a node. You can install a Listener on a node to listen to touch events. Check out http://www.cocos2d-x.org/wiki/How_To_Subclass_Sprite_And_Add_Event_Listeners for more information.

#3

I know that… But I try it in Sprite3D…
In Sprite3D, that is not working…

auto listener = EventListenerTouchOneByOne::create();
listener->setSwallowTouches(true);
listener->onTouchBegan = [](Touch* touch, Event* event) {
    auto target = static_cast<Sprite3D *>(event->getCurrentTarget());
    Vec2 locationInNode = target->convertToNodeSpace(touch->getLocation());
    Size size = target->getContentSize();
    log("size .. %f : %f", size.width, size.height);
    Rect rect = Rect(0, 0, size.width, size.height);
    if (rect.containsPoint(locationInNode))
    {
        log("touch");
        return true;
    }
    return false;
};
_eventDispatcher->addEventListenerWithSceneGraphPriority(listener, sprite3d2);
#4

Have you tried adding the Listener to the scene, and from that listener then compare the touch event coordinates to the Sprite3D (similar to what you are doing right now)?

#5

you know I haven’t tried touch events on a Sprite3D yet. I should really try that.

Are you guys using Blender to make your object files?

#6

I made obj file by using “3ds Max exporter”.

The problem is that getContentSize() and getBoundingBox() function don’t work in Sprite3D.

#7

I think there should be a getContentSize() and getBoundingBox() for Sprite 3D. I’m going to ping the developers about this to have them added. I’ll also ask for a way to calculate this while they are adding.

#8

Anyone made progress on this? Currently, as far as I know, it is not possible to detect touch events on Sprite3D nodes.

#9

The developers are aware and there has been internal discussion about this. I’m not current on the status of implementing this.

1 Like
#10

v3.2 sprite3D’s contentsize is zero. you can set a size to it.
We will at v3.3 use ray to detect a 3d modle.

#11

Ok, I see.
And I will wait for v3.3.

#12

@hhyytt, I did set the content size. Note however that currently content size only accepts a 2D size instead of 3D. Another problem is that when transforming the bounding box to world space, the Cocos2d-x transformation functions return an incorrect result. When I looked at the transformation code I noticed that in the transformation matrices, the z-axis isn’t being handled at all.

#13

Normally, 3D use AABB for a model.
@mtartist, you make 3D test or 2.5D test? if a sprite3D move in 2D scene, 2d bounding box can make a not very accurate pick/detect.

#14

@hhyytt, I’m working in 3D. Unfortunately Sprite3D does not have a method to return an AABB.

#15

This is all being worked out be the developers. I’ll see if I can get an update.

1 Like
#16

Hey guys, any update here? I’m working with Sprite3D in beta 3.3 and getBoundingBox still returns 0 :frowning:

#17

Hi, I’m also using 3.3beta0 and trying to tap on Sprite3D objects.
I see a Ray class and a Sprite3D::getAABB method, but I’m not sure how to cast the ray from the camera using the correct 3d position and direction… anyone has any ideas?

#18

I can try to get to this. With the developer conference on Tuesday I’m trying to finish the first version of the Programmer Guide.

#19

That would be great.
Too bad I really needed this feature for a game jam this week. I’m sure there’s some kind of mathemagick to combine the Touch, the Camera and Ray to achieve this, but I won’t have the time to figure it out. Surely this will be resolved for the actual 3.3 release.
Guess I’ll switch to Unity for a little while =(

EDIT: I’ve just found the ‘unproject’ method in CCCamera.h but I’m not sure how to make it work or if it’s useful at all… anyone has any ideas?

#20

Hi, what is the status on this?

I have been spending all day almost, just to be able to select my sprite3D… I am currently using v3.14.1, which is much newer than this post, yet it doesn’t work!
Is this still being worked on?

I don’t understand that the only info I find seems to say that it should work, but I can’t get a boundingbox nor an AABB, nor a raycast intersect or anything. Tried all the examples I could find, inluding cpptest, but nothing works.

Any solution?

ex: if I ask for the boundingbox of my sprite3D it always returns a width and height of -199998