Godot Basic Platform Player Example

extends KinematicBody2D

#Godot Basic Platform Player Script
#Copyright (C) 2021  Kristofer Occhipinti - Films By Kris
#http://filmsbykris.com

#This program is free software: you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation version 3 of the License.
#
#This program is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#GNU General Public License for more details.
#
#You should have received a copy of the GNU General Public License
#along with this program.  If not, see <http://www.gnu.org/licenses/>.

export (int) var speed = 500
export (int) var jump_speed = -500
export (int) var gravity = 800

export (float, 0, 1.0) var friction = 0.1
export (float, 0, 1.0) var acceleration = 0.25

var velocity = Vector2.ZERO
onready var sprite = $Sprite

func get_input():
    walk()
    jump()

func walk():
    var dir = 0
    if Input.is_action_pressed("walk_right"):
        dir += 1
        sprite.flip_h = 0
    if Input.is_action_pressed("walk_left"):
        dir -= 1
        sprite.flip_h = 1
    if dir != 0:
        velocity.x = lerp(velocity.x, dir * speed, acceleration)
    else:
        velocity.x = lerp(velocity.x, 0, friction)

func jump():
    if Input.is_action_just_pressed("jump"):
        if is_on_floor():
            velocity.y = jump_speed

func animation():
    if velocity.x > 1 || velocity.x < -1:
        sprite.play("walk")
    else:
        sprite.play("stand")

func _physics_process(delta):
    get_input()
    animation()
    velocity.y += gravity * delta
    velocity = move_and_slide(velocity, Vector2.UP)