How do I detect and collect an object?

Question

I have a 3d project and I want to create a point on the screen so that it detects when it is over an object and catch it.
How do I do this and what nodes do I need?

Answer 1

Hi,
you need raycast!

A RayCast represents a line from its origin to its destination position, cast_to. It is used to query the 3D space in order to find the closest object along the path of the ray.

RayCast can be configured to report collisions with Areas (collidewithareas) and/or PhysicsBodys (collidewithbodies).

Create a StaticBody under that create a CollisionShape. Set the CollisionShapes Shape. Best put your geometry in the StaticBody or CollisionShape container your just created.
Create a RayCast and put it under your camera. Do you see the faint white line? This is the ray that checks for collisions. Write a script ... check RayCast for iscolliding( ) ... get the collider with getcollider( )

have fun!

https://docs.godotengine.org/de/stable/tutorials/physics/ray-casting.html

Comments

I could do it with the body entered signal of an area to detect when there is something over this?

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Hi,
i dont understand your question. Surely you can do it with areas too. But i suggested to use raycast.
You could put an area under your camera and check this for collisions. But i would prefer raycast. This would although take sight blocking elements into account.

Try it and choose the method that suits your needs!