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