112 lines
2.8 KiB
GDScript
112 lines
2.8 KiB
GDScript
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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 MIN_ONAIR_TIME = 0.1
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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 onair_time = 0 #
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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 = get_node("sprite")
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func _fixed_process(delta):
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#increment counters
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onair_time+=delta
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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 Floor
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if (is_move_and_slide_on_floor()):
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onair_time=0
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on_floor = onair_time < MIN_ONAIR_TIME
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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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get_node("sound").play("jump")
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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.set_pos( get_node("sprite/bullet_shoot").get_global_pos() ) #use node for shoot position
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bullet.set_linear_velocity( Vector2( sprite.get_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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get_node("sound").play("shoot")
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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.set_scale( Vector2( -1, 1 ) )
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new_anim="run"
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if (linear_vel.x > SIDING_CHANGE_SPEED):
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sprite.set_scale( Vector2( 1, 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.set_scale( Vector2( -1, 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.set_scale( Vector2( 1, 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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get_node("anim").play(anim)
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func _ready():
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set_fixed_process(true)
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