Flappy bird

[Karina]

from scene import *
import random


class Column(SpriteNode):
	def __init__(self, **kwargs):
		SpriteNode.__init__(self, 'plf:Tile_BoxCrate_double', **kwargs)
		
		
class Game(Scene):
	def setup(self):
		self.background_color = '#99d7ff'
		x = 0
		ground = Node(parent=self)
		while x < self.size.w:
			lower_tile = SpriteNode('plf:Ground_Stone', (x, 30))
			higher_tile = SpriteNode('plf:Ground_Stone', (x, 738))

			x += 60
			ground.add_child(lower_tile)
			ground.add_child(higher_tile)
			self.add_column()
			
			
	def add_column(self):
		lower = random.randint(0, 360) // 64
		higher = random.randint(0, 360) // 64
		y = 45
		for i in range(lower):
			column = Column(parent=self)
			column.anchor_point = (0.5, 0)
			column.position = (self.size.w, y)
			y += 64
		y = 738
		for i in range(higher):
			column = Column(parent=self)
			column.anchor_point = (0.5, column.size.h)
			column.position = (self.size.w, y)
			y -= 64


run(Game())

This only makes ground and two columns at the end of the screen. The problem is that whenever I run this, the columns always at the same size. But I use random here, so they should get different each time. I can't get why is it so

[stephen]

Hello @Karina

im going to look into your code and ill br back with somthing for you. i do first want to suggest that instead of Random int you create Brushes kind of like Minecraft did for Trees. you would creat a class to for your brush objects then place them in a list. then use Random Choice instead and this randomly selects from list. gives you control of the objectvdesigns and easier to manage i find than dealing with ranges. that ssid ill be back ☺️😉🤓

[Karina]

I am new in programming and this is my first program in scene, so I don't know what are theese things. But thank you anyway

[Drizzel]

@Karina the issue lies in line 22.
Since add_column is in the loop, it will get called plenty of times. This results in a lot of columns stacked on top of another, and it is very probable that at least once these columns has the maximum number boxes, and therefore the „smallest“ gap.
Just remove one of the indents in line 22 to fix this.

Btw, what @stephen said is certainly worth looking into, like just about any of his suggestions

[stephen]

@Karina

heres is example of using brush like objects with scrolling nd random (not too random) spacing. if you have ny questions please ask!

@Drizzel thank you, i alwys try to help out tht way i get to learn kong the wy aswell 😎🤓🤓

from scene import *
import sound
import random
import math

A = Action
def w(): return get_screen_size()[0]
def h(): return get_screen_size()[1]
def MaxBrushSize(): return 10-2

def BaseBlock(parent):
	return SpriteNode(Texture('plf:Tile_BoxItem_boxed'),
						size=Size(64, 64), parent=parent,
						anchor_point=(0.0, 0.0))

def Block(parent):
	return SpriteNode(Texture('plf:Tile_BoxCrate_double'), 
						size=Size(64, 64), parent=parent,
						anchor_point=(0.0, 0.0))

def Stone(parent, x):
	return SpriteNode(Texture('plf:Tile_BrickGrey'),
						size=Size(64, 64), parent=parent,
						anchor_point=(0.0, 0.0), position=Point(x*64, 0))
						
class TopBrush(Node):
	def __init__(self, brushSize, *args, **kwargs):
		self.base=BaseBlock(self)
		self.size=Size(64, 64)
		self.position=Point(w()+(self.size.w), h()-self.size.h)
		self.brushSize=brushSize
		self.blocks=list([self.base, ])
		
		for x in range(1, self.brushSize):
			b=Block(self)
			b.position=(self.base.position[0], self.base.position[1] - x*b.size[1])
			self.blocks.append(b)
			
class BottomBrush(Node):
	def __init__(self, brushSize, *args, **kwargs):
		self.base=BaseBlock(self)
		self.size=Size(64, 64)
		self.position=Point(w()+(self.size.w), 0)
		self.brushSize=brushSize
		self.blocks=list([self.base, ])
		
		for x in range(1, self.brushSize):
			b=Block(self)
			b.position=(self.base.position[0], self.base.position[1] + x*b.size[1])
			self.blocks.append(b)
		
		

		

class MyScene (Scene):
	def setup(self):
		self.background=SpriteNode(Texture('plf:BG_Colored_grass'), 
			size=Size(w(), h()), position=self.size/2, parent=self)
		self.preset=[(1, 7),(2, 6),(3, 5),(4, 4),(5, 3),(6, 2),(7, 1)]
		self.i=0.0
		self.brushSpawnTimer=3.0
		self.brushes=list([])
		self.scrollSpeed=40
		
		for x in range(int((w()*128)/64)):
			self.brushes.append(Stone(self, x))
			
		
		
	def Add_Brush(self, choice):
		if self.i > self.brushSpawnTimer:
			bb=BottomBrush(choice[0])
			tb=TopBrush(choice[1])
			self.add_child(bb)
			self.add_child(tb)
			self.brushes.append(bb)
			self.brushes.append(tb)
			self.i=0.0
			self.brushSpawnTimer = random.randrange(3, 6)
		else:
			sb=Stone(self, (w()+128)/64)
			self.brushes.append(sb)
			
			
	def Remove_Brush(self, brush):
		self.brushes.remove(brush)
		brush.remove_from_parent()
		self.Add_Brush(random.choice(self.preset))
		
		
	def did_change_size(self):
		pass
		
	def Scroll(self, brush):
		x=brush.position[0]-self.scrollSpeed*self.dt
		y=brush.position[1]
		return Point(x, y)
		
	def update(self):
		self.i += self.dt
		for brush in self.brushes:
			if brush.position[0] <= -64:
				self.Remove_Brush(brush)
			brush.position = self.Scroll(brush)
	
	def touch_began(self, touch):
		pass
	
	def touch_moved(self, touch):
		pass
	
	def touch_ended(self, touch):
		pass

if __name__ == '__main__':
	run(MyScene(), show_fps=False)

[stephen]

Quick Note

The example i provided is for landscpe if you run portrait the gapps will not adjust. this can be handled by checking orientation and swapping the preset lists accordingly

[Karina]

@stephen I don't understand to much things, I've just read the tutorial and tried to do my own game.
I'll try to get it with time

[stephen]

@Karina il give a bit of a run down just give me few min to write it ☺️

[Karina]

@Drizzel yes I got it. Now it works how it should

[Drizzel]

@Karina

This is an old and sometimes very poorly written clone I did to learn about ai (flappy bird is an awesome game for basic artificial intelligence experiments). I didn’t bother about graphics, but maybe it’s helpful to you.

Run this to play the game:

from scene import *
import sound
import random
import math
import gameExtension as extension
#import nnExtension as nn
A = Action

class MyScene (Scene):
	
	def setup(self):
		self.background_color = 'beige'
		self.gravity = Vector2(0, -self.size.y/1500)
		self.birds = []

		self.running = True
		extension.setup_walls(self)
		extension.update_walls(self)
		
		#self.birdCount = 1 #uncomment if using ai
		
		for x in range(self.birdCount):
			extension.add_bird(self)
		pass
	
	def did_change_size(self):
		pass
	
	def update(self):
		if self.running:
			self.running = False
			extension.update_walls(self)
			
			for bird in self.birds:
				if bird.distance >= 10000: bird.dead = True
				if not bird.dead:
					self.running = True
					extension.count_distance(self, bird)
					extension.update_bird(self, bird)
					bird.data = extension.get_data(self, bird)
					
					if bird.position.y-bird.size.y/2 <= 0 or bird.position.y+bird.size.y/2 >= self.size.y:
						bird.color = 'red'
						bird.dead = True
						
					for wall in self.walls:
						if bird.frame.intersects(wall.frame):
							bird.color = 'red'
							bird.dead = True
				else:
					if bird.position.x + bird.size.x/2 >= 0:
						bird.position = (bird.position.x - 1, bird.position.y)
			
			
		
	def touch_began(self, touch):
		self.birds[0].up = True
		pass
	
	def touch_moved(self, touch):
		pass
	
	def touch_ended(self, touch):
		pass

if __name__ == '__main__':
	run(MyScene(), PORTRAIT, show_fps=True)

Save this in the same folder as the upper main code as gameExtension.py

from scene import *
import random

def add_bird(self):
	self.birds.append(ShapeNode(rect(0,0,10,10)))
	bird = self.birds[len(self.birds)-1]
	bird.color = 'black'
	bird.size = (self.size.x/50, self.size.x/50)
	bird.position = (self.size.x/4, self.size.y/2)
	bird.z_position = 2
	bird.dead = False
	bird.distance = 0
	bird.up = False
	bird.max_fall_vel = Vector2(0, self.size.y/100)
	bird.up_acc = Vector2(0, self.size.y/2)
	bird.vel = Vector2(0, 0)
	bird.acc = Vector2(0, 0)
	bird.data = get_data(self, bird)
	self.add_child(bird)
	
def setup_walls(self):
	self.wall_distance = self.size.x/4
	self.gap_size = self.size.y/6
	self.wall_width = self.size.x/14
	self.distance_to_next_wall = self.wall_distance + 1
	self.walls = []
	
def count_distance(self, bird):
	bird.distance = bird.distance + 1
	
def update_walls(self):
	if self.distance_to_next_wall >= self.wall_distance:
		self.distance_to_next_wall = 0
		build_wall(self)
	else: self.distance_to_next_wall = self.distance_to_next_wall+1
		
	removal = []
	for x in range(len(self.walls)):
		wall = self.walls[x]
		wall.position = (wall.position.x - 1, wall.position.y)
		
		if wall.position.x + wall.size.x/2 < 0:
			removal.append(x)
	
	for x in range(len(removal)):
		wallIndex = removal[x]-x
		wall = self.walls[wallIndex]
		wall.remove_from_parent()
		self.walls.pop(wallIndex)
		
def build_wall(self):
	posY = random.randint(round(self.gap_size/2), round(self.size.y - self.gap_size/2)) #random position of gap
	
	self.walls.append(ShapeNode(rect(0,0,10,10))) #set up the upper wall
	wall = self.walls[len(self.walls)-1]
	wall.size = (self.wall_width, self.size.y - posY - self.gap_size/2)
	wall.color = 'grey'
	wall.position = (self.size.x + self.wall_width/2, self.size.y - wall.size.y/2)
	wall.z_position =  1
	self.add_child(wall)
	
	self.walls.append(ShapeNode(rect(0,0,10,10))) #set up the lower wall
	wall = self.walls[len(self.walls)-1]
	wall.size = (self.wall_width, posY - self.gap_size/2)
	wall.color = 'grey'
	wall.position = (self.size.x + self.wall_width/2, wall.size.y/2)
	wall.z_position =  1
	self.add_child(wall)
	
def update_bird(self, bird):
	if bird.up:
		bird.up = False
		bird.acc = bird.up_acc
	else: bird.acc = self.gravity
		
	bird.vel = bird.vel + bird.acc
	if bird.vel[1] > bird.max_fall_vel[1]: bird.vel = bird.max_fall_vel
	
	
	bird.position = bird.position + bird.vel
	
def get_data(self, bird):
	data = []
	for x in range(len(self.walls)):
		wall = self.walls[x]
		if wall.position.x + wall.size.x/2 >= bird.position.x - bird.size.x/2:
			y_to_gap = (wall.position.x - wall.size.x/2) - (bird.position.x + bird.size.x/2)
			if y_to_gap < 0: y_to_gap = 0
			data.append(y_to_gap)
			x_to_upper_wall = (wall.position.y - wall.size.y/2) - (bird.position.y + bird.size.y/2)
			data.append(x_to_upper_wall)
			wall = self.walls[x+1]
			x_to_lower_wall = (wall.position.y + wall.size.y/2) - (bird.position.y - bird.size.y/2)
			data.append(x_to_lower_wall)
			break
	distance_to_top = self.size.y - bird.position.y + bird.size.y/2
	data.append(distance_to_top)
	distance_to_bottom = bird.position.y - bird.size.y/2
	data.append(distance_to_bottom)
	velocity = bird.vel[1]
	data.append(velocity)
	return data

[stephen]

@Karina
i hope this helps..

First

we have A = Action This is simply convenience. Actions are the scene module's Nimation system. You dont have to use this. As shown in the example you can do all manual animation inside the Scene.update() method. called aprox. 60/sec Read more on actions in the Documentation for Actions

Second

def w(): return get_screen_size()[0]
def h(): return get_screen_size()[1]
def MaxBrushSize(): return 10-2

scene doent handle Global variables very well, so im told, o to avoid thi we have some "Global" variable function. all the do is return the value. vlue here is from
get_screen_size() ⇒ Tuple(float, float)
the float values is our scren size in Points. More about Points here
MaxBrushSize is just in case we needed a 'clamp' for Arithmatic functions.

Third

def BaseBlock(parent):
    return SpriteNode(Texture('plf:Tile_BoxItem_boxed'),
                        size=Size(64, 64), parent=parent,
                        anchor_point=(0.0, 0.0))

def Block(parent):
    return SpriteNode(Texture('plf:Tile_BoxCrate_double'), 
                        size=Size(64, 64), parent=parent,
                        anchor_point=(0.0, 0.0))

def Stone(parent, x):
    return SpriteNode(Texture('plf:Tile_BrickGrey'),
                        size=Size(64, 64), parent=parent,
                        anchor_point=(0.0, 0.0), position=Point(x*64, 0))

Functions returning Our Sprites. By doing this we clean up our code making it eaier to read and debug. Technically we coud of done this in one function and check the string input for "BrickGrey" to add the minor position change. I split them up o help understanding whats going on fr yourself.

Next

class TopBrush(Node):
    def __init__(self, brushSize, *args, **kwargs):
        self.base=BaseBlock(self)
        self.size=Size(64, 64)
        self.position=Point(w()+(self.size.w), h()-self.size.h)
        self.brushSize=brushSize
        self.blocks=list([self.base, ])
        
        for x in range(1, self.brushSize):
            b=Block(self)
            b.position=(self.base.position[0], self.base.position[1] - x*b.size[1])
            self.blocks.append(b)
            
class BottomBrush(Node):
    def __init__(self, brushSize, *args, **kwargs):
        self.base=BaseBlock(self)
        self.size=Size(64, 64)
        self.position=Point(w()+(self.size.w), 0)
        self.brushSize=brushSize
        self.blocks=list([self.base, ])
        
        for x in range(1, self.brushSize):
            b=Block(self)
            b.position=(self.base.position[0], self.base.position[1] + x*b.size[1])
            self.blocks.append(b)

Pretyslf explnitoy here. simply grouping our sprits into two secions and setting thier position for pillar like setup. TopBrush and BottomBrush. Nothing els speceal here.

Lastly

Now that we have everything prepared we can play with it ☺️.

class MyScene (Scene):
    def setup(self):
        self.background=SpriteNode(Texture('plf:BG_Colored_grass'), 
            size=Size(w(), h()), position=self.size/2, parent=self)
        self.preset=[(1, 7),(2, 6),(3, 5),(4, 4),(5, 3),(6, 2),(7, 1)]
        self.i=0.0
        self.brushSpawnTimer=3.0
        self.brushes=list([])
        self.scrollSpeed=40
        
        for x in range(int((w()*128)/64)):
            self.brushes.append(Stone(self, x))

setup() is called after the Scene object is returned bu before Event Loop Starts so here you can use Scene Variables such as size or bounds to setup your Game screen Invironment.
*Note: you can overide the __init__ method but you must call to Scene.__init__(self, *args, **kwargs) otherwise your loop will become unstable and crash. generally no reason to call it. setup() usualy is all u need .

	def Add_Brush(self, choice):
   		if self.i > self.brushSpawnTimer:
       		bb=BottomBrush(choice[0])
        	tb=TopBrush(choice[1])
            self.add_child(bb)
            self.add_child(tb)
            self.brushes.append(bb)
            self.brushes.append(tb)
            self.i=0.0
            self.brushSpawnTimer = random.randrange(3, 6)
        else:
            sb=Stone(self, (w()+128)/64)
            self.brushes.append(sb)
            
            
    def Remove_Brush(self, brush):
        self.brushes.remove(brush)
        brush.remove_from_parent()
        self.Add_Brush(random.choice(self.preset))
        

Methods Add_Brush and Remove_Brush are very important. there would be no level without Add lol and Without Remove we could build up memory usage and thats never good. always clean up after yourself 😬🙃

	def Scroll(self, brush):
        x=brush.position[0]-self.scrollSpeed*self.dt
        y=brush.position[1]
        return Point(x, y)
        
    def update(self):
        self.i += self.dt
        for brush in self.brushes:
            if brush.position[0] <= -64:
                self.Remove_Brush(brush)
            brush.position = self.Scroll(brush)

Finaly our Scroll and update methods.. these two bring it all to life.. Only thing to realy spotlight here for you is self.dt
this is the Time Delta, time between calls. in this case its the time between Frames and usually 0.00165.... We are using it for two uses. one is a timer for spawning our brushes and other is to smooth out the movment of our objects to make it visually appealing..

---

I hope thi helps you understand hts going on. Scene is a powerful tool and not just for game design but you have a long frustrating jurny ahead of you.. but its worth it ☺️🤓🤓🤓 i would suggest you look into using scene and ui modules togeather.you only need to call fom scene import * and ui is already imported in scene. ready or you. if ou do this you get a much more devloper freindly User interface along with your game loop. all you need to do is connect your Scene class to a scene.SceneView and add it to your CustomView with self.add_subview().

Ill be glad to help with anything else you need.

[stephen]

@Drizzel well done 🙃🤓😎

[Drizzel]

@stephen thanks for the kind words, but some things are clumsy at best. Your summary is awesome, though. Although I am really glad that I can help here :) That way I can return at least a small amount of the support this community here has given me

[Karina]

@Drizzel you say you clumsy, but I don't know how to do theese things at all)
your explanations helped to understand the beginnin, I think it'll take time to understand it all
Do you know anything like Clock in pygame to work with time? I need to make a new column every 10 secs for example

[ccc]

If you need inspiration, https://github.com/Pythonista-Tools/Pythonista-Tools/blob/master/Games.md features a Flappy Bird style game called Jumpy Octopus.

[Karina]

@Drizzel i see now what brushes are. Do you know some article to read about it? But what difference between w() and self.size.w?
And MaxBrushSize() just returns 8?
And what difference between creating Potint and just passing a tuple to the position argument?
Sorry about bombarding you with questions)

[Drizzel]

@Karina said:

@Drizzel i see now what brushes are. Do you know some article to read about it? But what difference between w() and self.size.w?
And MaxBrushSize() just returns 8?
And what difference between creating Potint and just passing a tuple to the position argument?
Sorry about bombarding you with questions)

I'll just forward that to @stephen for now (I'm rather pressed on time for the next few hours), he's the mastermind behind brushes.

[Karina]

@stephen thank you for help and can you give me some articles about brushes and games on pythonista?
And do you know a way to work with time like in pygame.Clock? I already made a column move and need to add column every 5 seconds

[Drizzel]

@Karina said:

@Drizzel you say you clumsy, but I don't know how to do theese things at all)
your explanations helped to understand the beginnin, I think it'll take time to understand it all
Do you know anything like Clock in pygame to work with time? I need to make a new column every 10 secs for example

The update(...) function (is used in my code and the code by @stephen) is executed 60 times a second (as long as your device can handle the load). Here's a good explanation. You can use self.dt to check how much time has passed since the last frame was calculated, and self.t to check for how long the scene has been running.
Then just do put this line into setup(...):

self.time_of_last_column = self.t

and merge this with your update(self):

def update(self):
    if self.t - self.time_of_last_column >= 10:
        #put the code to place a new column here
        self.time_of_last_column = self.t

[Karina]

@Drizzel yes I have the docs in pythonista

I tried to do it like that, but I only get the black screen that I can't even close

def update(self):
		time_passed = 0
		while True:
			time_passed += self.dt
			if time_passed >= 0.5:
				print(time_passed)
				self.add_column()
				time_passed = 0
		self.column_moves()