How to limit Look At 3D speed?

Help
, ,
1

Godot Version

4.4.1

Question

I’m trying to set up a turret system using the Look At 3D node, and I’ve got everything else working except for limiting the speed how I like. While the time interpolation setting gets the right effect visually, I would like to limit the speed of the movement in general instead of having a set time. I’m assuming this would be done with a script, but I’ve yet to figure out how. For reference, I have one Look At node for rotation and another for elevation, each with their own bone to control.

2

for constant velocity, time and velocity are linearly dependent:

velocity = distance / time

So if you know two of those 3 values, you can easily calculate the third.

3

look_at is a method that does the rotation instantly.
you need to do a quaternion or basis spherical interpolation over time. for this you need to create a transform using a vector between the position of the tower and the target, and use looking_at.

this does the rotation in the Y axis:

var nod : Vector3 = Vector3(target.x, global_position.y, target.z)
if nod != global_position and nod != Vector3.UP:
	quaternion = quaternion.slerp(global_transform.looking_at(nod, Vector3.UP, true).basis.get_rotation_quaternion(), 0.1)

where 0.1 is the speed (the amount of interpolation that will happen during the frame.
this code should run every frame in physics_process.

4

Umm… if I understood correctly, the OP is using LookAtModifier3D on bones, which can gradually interpolate its orientation towards the target. The duration the transition can be specified via node’s property.

5

oh, sorry, that wasn’t very clear.
but a Node3D could still be used to rotate a bone or with a custom SkeletonModifier3D.

Node3D
	|-> LocalTarget

rotate the Node3D towards the enemy, the LocalTarget would be at a set distance, say, 10, and then set the LookAtModifier3D target to LocalTarget.

6

Always better to leave frame-by-frame work to native code in nodes, than doing it within processing functions in scripts.