How to roll a 3D cube?

(For some reason this question was flagged, I’m not sure why. Regardless, it should be fixed now :) )

While not a perfect example, here is the code that will rotate the cube by 90 degrees when the keyboard arrows are pressed:

extends Spatial

const GRID_SIZE = 1;
const MOVE_SPEED = 1;

var tween_node;
var tween_moving = false;

func _ready():
	tween_node = get_node("Tween");
	tween_node.connect("tween_completed", self, "_on_tween_completed");
	tween_moving = false;

func _process(_delta):
	if (tween_moving == false):
		if (Input.is_action_pressed("ui_up")):
			tween_node.interpolate_property(self, "translation",
				translation, translation + (Vector3.FORWARD * GRID_SIZE),
				MOVE_SPEED, Tween.TRANS_LINEAR, Tween.EASE_IN_OUT);
			tween_node.interpolate_property(self, "rotation",
				rotation, rotation + Vector3(deg2rad(-90), 0, 0),
				MOVE_SPEED, Tween.TRANS_LINEAR, Tween.EASE_IN_OUT);
			tween_node.start();
			tween_moving = true;
			
		elif (Input.is_action_pressed("ui_down")):
			tween_node.interpolate_property(self, "translation",
				translation, translation + (Vector3.BACK * GRID_SIZE),
				MOVE_SPEED, Tween.TRANS_LINEAR, Tween.EASE_IN_OUT);
			tween_node.interpolate_property(self, "rotation",
				rotation, rotation + Vector3(deg2rad(90), 0, 0),
				MOVE_SPEED, Tween.TRANS_LINEAR, Tween.EASE_IN_OUT);
			tween_node.start();
			tween_moving = true;
			
		elif (Input.is_action_pressed("ui_right")):
			tween_node.interpolate_property(self, "translation",
				translation, translation + (Vector3.RIGHT * GRID_SIZE),
				MOVE_SPEED, Tween.TRANS_LINEAR, Tween.EASE_IN_OUT);
			tween_node.interpolate_property(self, "rotation",
				rotation, rotation + Vector3(0, 0, deg2rad(-90)),
				MOVE_SPEED, Tween.TRANS_LINEAR, Tween.EASE_IN_OUT);
			
		elif (Input.is_action_pressed("ui_left")):
			tween_node.interpolate_property(self, "translation",
				translation, translation + (Vector3.LEFT * GRID_SIZE),
				MOVE_SPEED, Tween.TRANS_LINEAR, Tween.EASE_IN_OUT);
			tween_node.interpolate_property(self, "rotation",
				rotation, rotation + Vector3(0, 0, deg2rad(90)),
				MOVE_SPEED, Tween.TRANS_LINEAR, Tween.EASE_IN_OUT);
			tween_node.start();
			tween_moving = true;


func _on_tween_completed(object, property_nodepath):
	if (property_nodepath == ":translation" and object == self):
		tween_moving = false;

The code above doesn't work properly when the rotation is non uniform. When the rotation is uniform, it works as expected though. Ideally you'd want to use interpolate_method instead of interpolate_property and interpolate the rotate_x/rotate_y/rotate_z functions instead of changing the rotation property. I wasn't able to get the interpolate_method function working with any of the rotate functions though, but I didn't send too much time playing with it.

Here is a link to the Godot project on my Google Drive. Hopefully this give you an idea of how to do it. :smile: (Side note: Welcome to the forums!)

It looks like your previous post got stuck in the moderation queue. I'm not sure why, especially since the second post didn't get stuck. Regardless, I hope the project is helpful :smile: