3D top-down rotation and movement

[system]

	Attention	Topic was automatically imported from the old Question2Answer platform.
	Asked By	sionco
	Old Version	Published before Godot 3 was released.

Hi.
I know how to move a 3D kinematic character in 4 directions

ie:

if(Input.is_action_pressed("ui_down")):
   acceleration.z=-1
if(Input.is_action_pressed("ui_left")):
   acceleration.x=-1
move(acceleration*delta*SPEED)

But, if I want movement where pressing left rotates the character and pressing up always moves the character forwards relative to the characters z direction (not the world z direction), how would I do it? using the kinematic move function to keep physics.

[system]

	Reply From:	eons

You will have to move(rotated_movement_vector) to move on relative directions.

Here, docs on transforms:
http://docs.godotengine.org/en/stable/tutorials/matrices_and_transforms.html

This Codetuto tutorial about rotation and movement in godot:
http://codetuto.com/2016/01/godot-engine-movement-and-rotation-basics/

Also, look at this recent question+answers regarding how to work with transform matrix with an example using move:
https://forum.godotengine.org/10322/problem-in-using-transform

Thanks. The other person’s question was useful.

For others, I used:

	if(Input.is_action_pressed("ui_up")):
	accel.z=-10

if(Input.is_action_pressed("ui_down")):
	accel.z=10

if(Input.is_action_pressed("ui_right")):
	r += Vector3(0,-1,0) * RSpeed * delta

elif(Input.is_action_pressed("ui_left")):
	r += Vector3(0,1,0) * RSpeed * delta
move(get_global_transform().basis.xform(Vector3(0,0,accel.z))*delta)

sionco | 2016-12-01 22:52

Be careful with normal (euler) rotations in 3D, sometimes you may need make rotations with Quat

eons | 2016-12-01 23:09