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93 lines
2.5 KiB
GDScript
93 lines
2.5 KiB
GDScript
extends KinematicBody2D
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const GRAVITY_VEC = Vector2(0, 900)
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const FLOOR_NORMAL = Vector2(0, -1)
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const SLOPE_SLIDE_STOP = 25.0
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const WALK_SPEED = 250 # pixels/sec
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const JUMP_SPEED = 480
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const SIDING_CHANGE_SPEED = 10
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const BULLET_VELOCITY = 1000
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const SHOOT_TIME_SHOW_WEAPON = 0.2
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var linear_vel = Vector2()
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var on_floor = false
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var shoot_time = 99999 # time since last shot
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var anim = ""
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# cache the sprite here for fast access (we will set scale to flip it often)
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onready var sprite = $sprite
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func _physics_process(delta):
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# Increment counters
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shoot_time += delta
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### MOVEMENT ###
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# Apply gravity
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linear_vel += delta * GRAVITY_VEC
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# Move and slide
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linear_vel = move_and_slide(linear_vel, FLOOR_NORMAL, SLOPE_SLIDE_STOP)
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# Detect if we are on floor - only works if called *after* move_and_slide
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var on_floor = is_on_floor()
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### CONTROL ###
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# Horizontal movement
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var target_speed = 0
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if Input.is_action_pressed("move_left"):
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target_speed -= 1
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if Input.is_action_pressed("move_right"):
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target_speed += 1
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target_speed *= WALK_SPEED
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linear_vel.x = lerp(linear_vel.x, target_speed, 0.1)
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# Jumping
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if on_floor and Input.is_action_just_pressed("jump"):
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linear_vel.y = -JUMP_SPEED
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$sound_jump.play()
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# Shooting
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if Input.is_action_just_pressed("shoot"):
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var bullet = preload("res://bullet.tscn").instance()
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bullet.position = $sprite/bullet_shoot.global_position # use node for shoot position
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bullet.linear_velocity = Vector2(sprite.scale.x * BULLET_VELOCITY, 0)
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bullet.add_collision_exception_with(self) # don't want player to collide with bullet
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get_parent().add_child(bullet) # don't want bullet to move with me, so add it as child of parent
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$sound_shoot.play()
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shoot_time = 0
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### ANIMATION ###
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var new_anim = "idle"
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if on_floor:
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if linear_vel.x < -SIDING_CHANGE_SPEED:
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sprite.scale.x = -1
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new_anim = "run"
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if linear_vel.x > SIDING_CHANGE_SPEED:
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sprite.scale.x = 1
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new_anim = "run"
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else:
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# We want the character to immediately change facing side when the player
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# tries to change direction, during air control.
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# This allows for example the player to shoot quickly left then right.
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if Input.is_action_pressed("move_left") and not Input.is_action_pressed("move_right"):
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sprite.scale.x = -1
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if Input.is_action_pressed("move_right") and not Input.is_action_pressed("move_left"):
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sprite.scale.x = 1
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if linear_vel.y < 0:
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new_anim = "jumping"
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else:
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new_anim = "falling"
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if shoot_time < SHOOT_TIME_SHOW_WEAPON:
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new_anim += "_weapon"
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if new_anim != anim:
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anim = new_anim
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$anim.play(anim)
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