godot/demos/viewport/2d_in_3d/pong.gd

74 lines
2.0 KiB
GDScript

extends Node2D
# member variables here, example:
# var a=2
# var b="textvar"
const INITIAL_BALL_SPEED = 80
var ball_speed = INITIAL_BALL_SPEED
var screen_size = Vector2(640,400)
#default ball direction
var direction = Vector2(-1,0)
var pad_size = Vector2(8,32)
const PAD_SPEED = 150
func _process(delta):
# get ball positio and pad rectangles
var ball_pos = get_node("ball").get_pos()
var left_rect = Rect2( get_node("left").get_pos() - pad_size*0.5, pad_size )
var right_rect = Rect2( get_node("right").get_pos() - pad_size*0.5, pad_size )
#integrate new ball postion
ball_pos+=direction*ball_speed*delta
#flip when touching roof or floor
if ( (ball_pos.y<0 and direction.y <0) or (ball_pos.y>screen_size.y and direction.y>0)):
direction.y = -direction.y
#flip, change direction and increase speed when touching pads
if ( (left_rect.has_point(ball_pos) and direction.x < 0) or (right_rect.has_point(ball_pos) and direction.x > 0)):
direction.x=-direction.x
ball_speed*=1.1
direction.y=randf()*2.0-1
direction = direction.normalized()
#check gameover
if (ball_pos.x<0 or ball_pos.x>screen_size.x):
ball_pos=screen_size*0.5
ball_speed=INITIAL_BALL_SPEED
direction=Vector2(-1,0)
get_node("ball").set_pos(ball_pos)
#move left pad
var left_pos = get_node("left").get_pos()
if (left_pos.y > 0 and Input.is_action_pressed("left_move_up")):
left_pos.y+=-PAD_SPEED*delta
if (left_pos.y < screen_size.y and Input.is_action_pressed("left_move_down")):
left_pos.y+=PAD_SPEED*delta
get_node("left").set_pos(left_pos)
#move right pad
var right_pos = get_node("right").get_pos()
if (right_pos.y > 0 and Input.is_action_pressed("right_move_up")):
right_pos.y+=-PAD_SPEED*delta
if (right_pos.y < screen_size.y and Input.is_action_pressed("right_move_down")):
right_pos.y+=PAD_SPEED*delta
get_node("right").set_pos(right_pos)
func _ready():
screen_size = get_viewport_rect().size # get actual size
pad_size = get_node("left").get_texture().get_size()
set_process(true)