meat_madness_redux/godot/player/OnFootPhysics.gd

126 lines
4.0 KiB
GDScript

extends KinematicBody
onready var util = get_node("/root/Util")
export var gravity: float = 6.0
# When falling, gravity is artificially increased
export var gravity_downwards_factor: float = 3
export var ground_gravity: float = 3.1
# Rate of gaining speed
export var velocity_acceleration_xz: float = 3
export var velocity_acceleration_y: float = 5
# Rate of losing speed when stopping
export var velocity_friction_xz: float = 15
export var velocity_friction_y: float = 1
export var jump_power: float = 50
# Controls the base speeds of walking and sprinting
export var sprint_factor: float = 3.5
export var walk_factor: float = 1.5
"public" var velocity: Vector3 = Vector3.ZERO
# Value changed by code only to add slow down or speed up effects
var velocity_factor: Vector3 = Vector3.ONE
var target_velocity: Vector3 = Vector3.ZERO
var is_jumping: bool = false
var jump_permission: float = 1.0
var is_falling: bool = false
var is_falling_medium = false
var is_falling_terminally: bool = false
var just_landed: bool = false
var just_landed_medium: bool = false
var just_landed_terminally: bool = false
func get_terminal_falling_velocity():
return -9
func is_falling_velocity_terminal():
return velocity.y <= get_terminal_falling_velocity()
func process_velocity(delta: float):
# Uses the input from MovementInput to compute and update this node's velocity
# velocity_acceleration controls gradual speedup whereas velocity_friction
# controls gradual slowdown
# Gravity
# You can buffer jumps by pressing releaseing the space bar and then pressing it again
if not is_on_floor():
var grav = -gravity
target_velocity.y = grav
# Gravity is stronger when you're falling. Feels nicer
target_velocity.y *= util.clamped_lerp(gravity_downwards_factor, 1.0, velocity.y/2, 0.0)
else:
velocity.y = max(0.0, velocity.y)
target_velocity.y = max(0.0, max(target_velocity.y, jump_power * $"../MovementInput".jump_intent * jump_permission))
if target_velocity.y == 0.0 and velocity.y == 0.0:
velocity.y = -ground_gravity
if not is_jumping and $"../MovementInput".jump_intent != 0.0 and is_on_floor():
jump_permission = 0.0
is_jumping = true
elif is_jumping and $"../MovementInput".jump_intent == 0.0:
jump_permission = 1.0
is_jumping = false
var target_velocity_xz = $"../MovementInput".input_xz
if $"../MovementInput".sprinting:
target_velocity_xz *= sprint_factor
else:
target_velocity_xz *= walk_factor
target_velocity = util.vec2_xz_to_vec3(target_velocity_xz, target_velocity.y) * velocity_factor
var velocity_xz = util.vec3_xz(velocity)
var xz_weight = velocity_acceleration_xz * delta
if target_velocity_xz.length() < velocity_xz.length():
xz_weight = velocity_friction_xz * delta
var target_xz_length = util.clamped_lerp(velocity_xz.length(), target_velocity_xz.length(), xz_weight, 0.25)
if target_velocity_xz != Vector2.ZERO:
velocity_xz = target_velocity_xz.normalized() * target_xz_length
elif velocity_xz != Vector2.ZERO:
velocity_xz = velocity_xz.normalized() * target_xz_length
var y_weight = velocity_acceleration_y * delta
if target_velocity.y < velocity.y:
y_weight = velocity_friction_y * delta
var velocity_y = util.clamped_lerp(velocity.y, target_velocity.y, y_weight, 0.25)
velocity = util.vec2_xz_to_vec3(velocity_xz, velocity_y)
func process_falling():
if not $Floor.is_on_floor and not is_on_floor():
is_falling = true
just_landed = false
just_landed_medium = false
just_landed_terminally = false
if velocity.y <= -5.0:
is_falling_medium = true
if is_falling_velocity_terminal():
is_falling_terminally = true
return
just_landed = is_falling
just_landed_medium = is_falling_medium
just_landed_terminally = is_falling_terminally
is_falling = false
is_falling_medium = false
is_falling_terminally = false
func increase_velocity_factor(by: Vector3):
velocity_factor *= by
func decrease_velocity_factor(by: Vector3):
velocity_factor /= by
func _physics_process(delta):
process_velocity(delta)
velocity = move_and_slide(velocity, Vector3.UP, true, 4, 1.3217304764)
process_falling()