Question

How to move a KinematicBody2D with Keyboard Left and Right.

example: I press the key: Left move to left
I Press the key: Right move to right

Answer 1

Many things of how to move a kinematic character depends on your design, but the basics are on the docs:
Official docs on Kinematic Character
https://godot.readthedocs.io/en/stable/tutorials/2d/kinematic_character_2d.html

And a basic (a bit old but useful) tutorial about Input and InputEvent
http://www.gamefromscratch.com/post/2015/01/28/Godot-Engine-Tutorial-Part-3-Program-Lifecycle-and-Input-Handling.aspx

Also, check the official demos on kinematic characters (there are 2 for the Stable).

Comments

Is to long. I Need sometingh like this:

extends Area2D

member variables here, example:

var motion
const SPEED = 250

func ready():
setprocess(true)
pass

func _process(delta):

motion = Vector2()

if Input.is_action_pressed("ui_up"):
    motion += Vector2(0,-1)
if Input.is_action_pressed("ui_down"):
    motion += Vector2(0,1)
if Input.is_action_pressed("ui_left"):
    motion += Vector2(-1,0)
if Input.is_action_pressed("ui_right"):
    motion += Vector2(1,0)

var pos = get_pos()
pos += motion * delta * SPEED
var size = get_viewport_rect().size

pos.x = clamp (pos.x,0,size.x)
pos.y = clamp (pos.y,0,size.y)

set_pos(pos)
pass

but for kinematicbody2d

Answer 2

I solved:

# Codigo Jugador

extends KinematicBody2D

var semueve = false
var motion = Vector2(0,0)
var startpos = Vector2(0,0)
const SPEED = 290.0

func ready():
setfixedprocess(true)
startpos = get_pos()
pass

func fixedprocess(delta):

if Input.is_action_pressed("Tecla_Izquierda"):
    se_mueve = true
    motion = Vector2(-1,0)
    start_pos = get_pos()

if Input.is_action_pressed("Tecla_Derecha"):
    se_mueve = false
    motion = Vector2(1,0)
    start_pos = get_pos()

var pos = start_pos

pos += motion * delta * SPEED
set_pos(pos)

pass

Comments

you should use: move instead of setpos, setpos will ignore collisions

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You should mark this as the answer to your question, if it is solved

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You're right "set_pos()" ignores collisions. I have problems with my game.

Sorry if some words are not understood. I'm using google translato