FPSPlayer.gd

# FPS Player
# Copyright (C) 2020 Oğuzhan Eroğlu <[email protected]> (https://oguzhaneroglu.com)

extends KinematicBody

onready var nCamera: Camera = $Camera

export var walk_speed: float = 1
export var sprint_factor: float = 2
export var mouse_sensitivity: float = 0.25

export var gravity = 9.8

onready var nCurrentWeapon = $Camera/AK47
onready var nCurrentWeaponAP = $Camera/AK47/AnimationPlayer

var is_shooting = false
var shoot_time = 0
var shoot_duration = 350

func _ready() -> void:
    OS.window_fullscreen = false

func _physics_process(delta: float) -> void:
    var input_left = Input.get_action_strength("ui_left")
    var input_right = Input.get_action_strength("ui_right")
    var input_up = Input.get_action_strength("ui_up")
    var input_down = Input.get_action_strength("ui_down")
    var input_sprint = Input.is_action_pressed("sprint")

    var current_walk_speed = walk_speed
    
    if input_sprint:
        current_walk_speed = walk_speed * sprint_factor
        $WalkSound.pitch_scale = 1.5
    else:
        $WalkSound.pitch_scale = 1
    
    var rotation_angle = nCamera.rotation.y

    var jump_velocity = 0

    var velocity = Vector3(0, jump_velocity, 0)

    var mv = (input_up - input_down)
    var mh = (input_left - input_right)

    var angle = 0

    if mv != 0:
        if mv > 0:
            if mh > 0:
                angle = (rotation_angle - PI) + PI/4
            elif mh < 0:
                angle = (rotation_angle + PI) - PI/4
            else:
                angle = rotation_angle - PI
        elif mv < 0:
            if mh > 0:
                angle = rotation_angle - PI/4
            elif mh < 0:
                angle = rotation_angle + PI/4
            else:
                angle = rotation_angle
    else:
        if mh > 0:
            angle = rotation_angle - PI/2
        else:
            angle = rotation_angle + PI/2

    var dx = sin(angle)
    var dy = cos(angle)

    if mv != 0 or mh != 0:
        if not is_shooting:
            nCurrentWeaponAP.play("Walk")
        
        velocity.x = dx
        velocity.z = dy
        
        if not $WalkSound.playing:
            $WalkSound.play()
    elif not is_shooting:
        nCurrentWeaponAP.stop()
        $WalkSound.stop()

    velocity = velocity.normalized() * current_walk_speed

    move_and_collide(velocity)

func _process(delta):
    if is_shooting and OS.get_ticks_msec() - shoot_time >= shoot_duration:
        is_shooting = false

func _input(event) -> void:
    if event is InputEventMouseMotion:
        nCamera.rotation.x -= deg2rad(event.relative.y * mouse_sensitivity)
        nCamera.rotation.x = clamp(nCamera.rotation.x, deg2rad(-90), deg2rad(90))
        nCamera.rotate_y(-deg2rad(event.relative.x * mouse_sensitivity))
    elif event is InputEventMouseButton:
        if event.button_index == BUTTON_LEFT:
            if OS.get_ticks_msec() - shoot_time >= 1000:
                nCurrentWeaponAP.play("Shoot")
                shoot_time = OS.get_ticks_msec()
                is_shooting = true