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How can I get a pygame rect to move smoothly? Like if I update the x position by 2 it looks smooth but if I update it by bigger number like 25 it teleports to the position. Also, if possible, can this work for decimals also?
Visual Representation
import pygame
import math
GREEN = (20, 255, 140)
GREY = (210, 210 ,210)
WHITE = (255, 255, 255)
RED = (255, 0, 0)
PURPLE = (255, 0, 255)
BLUE = (0, 0, 255)
BLACK = (0, 0, 0)
class Dot(pygame.sprite.Sprite):
# This class represents a car. It derives from the "Sprite" class in Pygame.
def __init__(self, color, width, height):
# Call the parent class (Sprite) constructor
super().__init__()
# Pass in the color of the car, and its x and y position, width and height.
# Set the background color and set it to be transparent
self.image = pygame.Surface([width, height])
self.image.fill(WHITE)
self.image.set_colorkey(WHITE)
self.color = color
self.width = width
self.height = height
pygame.draw.rect(self.image, self.color, [0, 0, self.width, self.height])
self.rect = self.image.get_rect()
How can I get a pygame rect to move smoothly?
If your rectangle has to move 25px per frame, then the it makes no sens to draw the rectangles at the positions in between. The display is updated once per frame and it make no sens at all to draw the rectangle at the positions in between.
Possibly you have to less frames per second. In that case you have to increase the framerate and you can decrease the movement. Note, the human eye can just process a certain number of images per second. The trick is that you generate enough frames, that the movement appears smooth for the human eye.
pygame.Rect can store integral values only. If you want to operate with a very high framerate and floating accuracy, then you have to store the position of the object in separate floating point attributes. Synchronize the rounded position to the rectangle attribute. Note, you cannot draw on a "half" pixel of the window (at least in pygame).
e.g.:
class Dot(pygame.sprite.Sprite):
# This class represents a car. It derives from the "Sprite" class in Pygame.
def __init__(self, color, x, y, width, height):
# Call the parent class (Sprite) constructor
super().__init__()
# Pass in the color of the car, and its x and y position, width and height.
# Set the background color and set it to be transparent
self.x = x
self.y = y
self.image = pygame.Surface([width, height])
self.image.fill(self.color)
self.rect = self.image.get_rect(center = (round(x), round(y)))
def update(self):
# update position of object (change `self.x`, ``self.y``)
# [...]
# synchronize position to `.rect`
self.rect.center = (round(x), round(y))
I need to store a Circle in a variable but after I've done that it has turned into a rect
circle_1 = pygame.draw.circle(screen, (0, 0, 0), (300, 300), 30)
Print(circle_1)
the print returns
<rect(270, 270, 60, 60)>
but I can't work with that.
My circle is predefined but it won't show it on the canvas, here is an example of the problem
> import pygame, sys
>
>
> pygame.init() screen = pygame.display.set_mode((600, 600))
> predefined_circle = pygame.draw.circle(screen,(0, 0, 0),(300, 300), 30)
>
> def update():
> screen.fill((200, 0, 0))
> while 1:
> for event in pygame.event.get():
> if event.type == pygame.QUIT: sys.exit()
> # It shows my circle if I dirctly tip pygame.draw.circle(screen,(0, 0, 0),(300, 300), 30) into it
> predefined_circle
> pygame.display.update()
>
> update()
So that you can better relate to what I'm trying to achieve here is the code of what I'm doing but it is not necessary to read as I've already tried to explain it as best as I can above.
Please note the comments should explain everything that the block of code below it is doing.
# Creating the canvas which can paint any wanted Object from another class
class Canvas:
# Initialising the screen and setting all needed variables
def __init__(self, painting):
pygame.init()
self.screen_size = (600, 600)
self.background = (25, 255, 255)
self.screen = pygame.display.set_mode(self.screen_size)
self.paint = painting
# Let the user set the name of the canvas
def set_screen_name(self):
return self.screen
# Draw the everything you want to
def update(self):
# Paint the canvas
self.screen.fill(self.background)
# Make the game be quittable
while 1:
for event in pygame.event.get():
if event.type == pygame.QUIT: sys.exit()
# Draw the defined Circle and then update the Canvas
# it only draws a circle if directly tip pygame.draw.circle(surface, color, position, radius)
self.paint
pygame.display.update()
# Draw any circle you like
class Cir:
# Get all the required Information's to Draw a circle
def __init__(self, canvas, what_color, position, radius, line=0):
self.can = canvas
self.color = what_color
self.pos = position
self.r = radius
self.line = line
self.cir = None
# Create the circle with the acquired Information's
def create(self):
self.cir = pygame.draw.circle(self.can, self.color, self.pos, self.r, self.line)
return self.cir
# So far there is no Surface for the Cir class
# And there is no Object that cloud be painted for the Canvas class
# I initialise a canvas instance without anything that needs to be painted
get_surface = Canvas(None)
# Now I can access set_screen_name from the Canvas class and give the surface a name
# Which the Cir class can now use as a surface
screen = get_surface.set_screen_name()
c1 = pygame.draw.circle(screen, (0,0,0), (300, 300), 30)
print(c1)
# I'm initialising a circle
init_circle = Cir(screen, (0, 255, 0), (300, 300), 30)
# Create the initialised circle
circle_1 = init_circle.create()
# Give the Canvas class the created circle
paint = Canvas(circle_1)
# Draw the circle
paint.update()
My circle turns to a rect.
Actually, no, it doesn't. As per the documentation for those drawing functions, the intent of the calls is to draw something immediately, not to give you an object you can draw later:
Draw several simple shapes to a Surface.
From analysis of your question, it sounds like you believe that you are storing the act of drawing the circle so that it can be done later. That is not the case. Instead, what you are doing is actually drawing the circle and saving the result of that drawing action - evaluating the result later on will not actually draw, or redraw, the circle.
So, if the draw function is not returning something for later drawing, what is it returning? That can also be found in the above-mentioned documentation:
The functions return a rectangle representing the bounding area of changed pixels.
In other words, it's telling you the smallest rectangle that was changed by the drawing action - this will be a square with sides the same length as the diameter and centered around the same point.
Obviously, the authors of PyGame thought this information may be handy for some purpose, just not the purpose of redrawing the circle :-)
One way to do what you're trying to achieve would be to simply have a function to draw the "predefined" circle and call that instead of trying to evaluate the rectangle returned from a previous call.
So I'm making an rpg project in Pygame and I need a button class that has text. This is my Code so far. I tried to use some code examples online and on this site but I couldn't make them work in the way I wanted. ;-;
What I want is a button that can drawn to my GameWindow that includes text. I'll figure out the event handling later on.
It would be greatly appreciated if someone could give me an explanation of how a button class that utilises text would work in pygame and explain it in a way I could implement in my Button Class. Previously I have tried simply placing text in the centre of the screen by dividing the width and height by two and placing coloured rects adjacent to the text to try and label the rects so I could use them as buttons. However I realised this wasn't a practical solution, as I would be needing many buttons throughout my game and this method took up large portions of my screen.
I do not understand how to blit a message onto a rect using a class. The Button class below is where I attempted to place text onto top of a rect but I found this very hard.
Ideally my goal here is to be able to call an instance of my button class which I can use as a button.
BTW asking here was a last resort. I spent almost three hours trying to figure this out and its bad for me to stare at a screen for that long.
import pygame, random, sys, math, time
from pygame.locals import *
pygame.init()
FPS = 30
fpsClock = pygame.time.Clock()
GameWindow = pygame.display.set_mode((650,520))
#Variables
Blue = (0,0,255)
Green = (0,255,0)
Red = (255,0,0)
White = (255,255,255)
Black = (0,0,0)
def Button():
def__init__(self, surface, x, y, width, height, colour, message, action=None)
self.x = x
self.y = y
self.width = width
self.height = height
self.font = pygame.font.Font(None, 20)
self.message = message
background_image = pygame.image.load('map.JPG')
title_image = pygame.image.load('title.PNG')
while True:
for event in pygame.event.get():
if event.type == QUIT:
pygame.quit()
sys.exit()
GameWindow.blit(background_image, [0,0])
GameWindow.blit(title_image, [100,0])
pygame.display.flip()
fpsClock.tick(FPS)
Here is a button class:
class Button(object):
global screen_width,screen_height,screen
def __init__(self,x,y,width,height,text_color,background_color,text):
self.rect=pygame.Rect(x,y,width,height)
self.x=x
self.y=y
self.width=width
self.height=height
self.text=text
self.text_color=text_color
self.background_color=background_color
self.angle=0
def check(self):
return self.rect.collidepoint(pygame.mouse.get_pos())
def draw(self):
pygame.draw.rect(screen, self.background_color,(self.rect),0)
drawTextcenter(self.text,font,screen,self.x+self.width/2,self.y+self.height/2,self.text_color)
pygame.draw.rect(screen,self.text_color,self.rect,3)
Use the check function to see if your button is clicked on, and the draw function to draw your button.
Implemented into your main loop:
button=Button(x,y,width,height,text_color,background_color,text)
while True:
for event in pygame.event.get():
if event.type == QUIT:
pygame.quit()
sys.exit()
elif event.type==pygame.MOUSEBUTTONDOWN:
if button.check()==True:
#do what you want to do when button is pressed
GameWindow.blit(background_image, [0,0])
GameWindow.blit(title_image, [100,0])
pygame.display.flip()
fpsClock.tick(FPS)
I also recommend using these functions to draw text:
def drawTextcenter(text,font,screen,x,y,color):
textobj=font.render(text,True,color)
textrect=textobj.get_rect(center=(x,y))
screen.blit(textobj,textrect)
def drawText(text, font, surface, x, y,color):
textobj=font.render(text, 1, color)
textrect=textobj.get_rect()
textrect.topleft=(x, y)
surface.blit(textobj, textrect)
While you're question is still a bit confusing, I can tell you how you blit your text near or in your button. So what you just do is just place the location of the text near the button, basing the texts x and y variables on the buttons x and y variable.
Copied from your code:
def Button():
def__init__(self, surface, x, y, width, height, colour, message, action=None)
self.x = x
self.y = y
self.width = width
self.height = height
self.font = pygame.font.Font(None, 20)
self.message = message
self.font = pygame.font.SysFont('Comic Sans MS', 30) #Example Font
def draw_button(self):
pygame.draw.rect(GameWindow, Red, (self.x, self.y, self.width, self.height))
self.text = myfont.render(message, False, (0, 0, 0))
GameWindow.blit(self.text, (self.x + self.width/2, self.y + self.height/2)) #Displays text at coordinates at middle of the button.
This draws the button (it still doesn't do anything), but also displays the text in the button. HOWEVER, since the text is displayed at the top-left corner of the surface it is on, it will not be exactly in the middle, and will look odd. You can modify the exact location if you want.
I hope this answers your question.
#Imported Pygame
import pygame
#The Colors
BLACK = ( 0, 0, 0)
GREEN = ( 0, 255, 0)
WHITE = ( 255, 255, 255)
RED = ( 255, 0, 0)
ORANGE = ( 255, 115, 0)
YELLOW = ( 242, 255, 0)
BROWN = ( 115, 87, 39)
PURPLE = ( 298, 0, 247)
GRAY = ( 168, 168, 168)
PINK = ( 255, 0, 234)
pygame.init()
#The Screen
screen = pygame.display.set_mode([1000,500])
#Name of the window
pygame.display.set_caption("My first game")
clock = pygame.time.Clock()
#The sounds
# Positions of graphics
background_position = [0,0]
singleplayer_position = [350,200]
#The graphics
background_image = pygame.image.load("Castle.png").convert()
singleplayer_image = pygame.image.load("SinglePlayer.png").convert()
singleplayer_image.set_colorkey(WHITE)
#Main Loop __________________________
done = False
while not done:
for event in pygame.event.get():
if event.type == pygame.QUIT:
done = True
# Copy of background or main menu
screen.blit(background_image, background_position)
#Copy of other images
screen.blit(singleplayer_image, singleplayer_position)
pygame.display.flip()
if pygame.mouse.get_pressed()[0] and singleplayer_image.collidepoint(mouse_pos):
print("Hi")
clock.tick(60)
#To quit game
pygame.quit()
This is basicaly my code, but I keep getting the error that pygame.surface object has no attribute collide point. Im trying to have a clickable image,, but it isn't working to well. If you could show a way that a image can be clickable thank you.
Your traceback is explaining the issue perfectly: pygame surfaces do not have an attribute collide_point. Collidepoint belongs to the Rect class, but you are calling it on a Surface object.
To test if if the mouse position collides with the image, you need to have a Rect that describes the images position. So, if you redefine your singleplayer_position...
singleplayer_position = Rect(350, 200, 100, 100) # Width/height of 100 pixels.
You can now use this variable for Rect methods, such as collidepoint.
singleplayer_position.collidepoint(mouse_pos)
Note: To have your Rect accurately represent the picture you load..
singleplayer_position = singleplayer_image.get_rect()
This defaults to the top left, but it has the correct width/height now. Lets move it to where you wanted it.
singleplayer_position = singleplayer_position.move(350, 200)
Edit, to show how to get mouse position:
Add at the top,
from pygame.locals import * # Brings in all the pygame keywords we need.
Now, add this to your event for loop.
if event.type == MOUSEBUTTONDOWN:
mouse_pos = event.pos # Now it will have the coordinates of click point.
if singleplayer_position.collidepoint(mouse_pos):
print('hi')
Now, whenever the mousebutton is clicked down, you can check the images Rect (singleplayer_position) to see if it collides with where the mouse was clickd.
I have a pygame menu where i have drawn some buttons, which represent the level difficulty of my game. For user convenience, i have made a sprite which indicates which level-button is selected(think of it as a light green frame around the button). Now, if i have a solid color as my background, i can just fill the frame with the bg color. But i wanna have a custom image. However i am not sure how to do the deleting stuff with this image. I dont want to have to do a surface.blit(bgImage, surface.get_rect())
in every while-loop. Is there any way to tell pygame to blit just part of the image? So the end-result is still fine-looking. Here is my code when i have a color as the background
(please note that my question does not apply only to this scenario, its more of a general way as to blitting part of an image, without having to rely on cropping the image using 3rd party software like paint(net), photoshop etc.):
#class for the highlight sprite that appears when a level button is clicked
class HighLightImage(Sprite):
def __init__(self, spriteX, spriteY, width = 180, height = 60):
Sprite.__init__(self)
self.rect = pygame.Rect(spriteX, spriteY, width, height)
self.image = pygame.image.load("highlight.png")
#function to draw the highlight sprite, after deleting its older position.
def draw(self, newSpriteX, newSpriteY):
#due to technical issues the following method is using 4 dirty sprite deletions.
surface.fill(bgCol, (self.rect.x, self.rect.y, self.rect.width, 10))
surface.fill(bgCol, (self.rect.x, self.rect.y + self.rect.height-10, self.rect.width, 10))
surface.fill(bgCol, (self.rect.x, self.rect.y, 10, self.rect.height))
surface.fill(bgCol, ( self.rect.x + self.rect.width-10, self.rect.y, 10, self.rect.height))
self.rect.x = newSpriteX
self.rect.y = newSpriteY
surface.blit(self.image, self.rect)
And here is the main while-loop
def mainIntro():
#snake image
snakeImg = pygame.image.load("snakeB.png")
snakeImg = pygame.transform.scale(snakeImg, (150,200))
#highlight obj
hlObj = HighLightImage(0, 0)
#starting level = 1
levels = 1
#initial fill
surface.fill(bgCol)
intro = True
#start button
startButton = StartButton(WIDTH/2-330, HEIGHT - 150)
startButton.draw("Start")
#Exit button
exitButton = ExitButton(WIDTH/2+110, HEIGHT - 150)
exitButton.draw("Exit")
#level buttons
easyLvl = EasyLevelButton( 65, HEIGHT/2 )
easyLvl.draw("Easy")
midLvl = MediumLevelButton( 320, HEIGHT/2 )
midLvl.draw("Medium")
hardLvl = HardLevelButton( 570, HEIGHT/2 )
hardLvl.draw("Hard")
instructions()
surface.blit(snakeImg, (WIDTH/2-75, HEIGHT - 250))
while intro:
for ev in pygame.event.get():
# X exit event
if ev.type == QUIT:
pygame.quit()
sys.exit()
if ev.type == MOUSEMOTION:
startButton.hover()
exitButton.hover()
easyLvl.hover()
midLvl.hover()
hardLvl.hover()
if ev.type == MOUSEBUTTONDOWN:
if easyLvl.clicked():
levels = 1
if midLvl.clicked():
levels = 2
if hardLvl.clicked():
levels = 4
#button exit event
elif exitButton.clicked():
pygame.quit()
sys.exit()
elif startButton.clicked():
intro = False
#highlight frame, according to level-button chosen
if levels == 1:
hlObj.draw(easyLvl.x-10, easyLvl.y-10)
elif levels == 2:
hlObj.draw(midLvl.x-10, midLvl.y-10)
elif levels == 4:
hlObj.draw(hardLvl.x-10, hardLvl.y-10)
update()
return levels
Finally here is an image of the end result :
P.s In the above code snippets i have not included the button classes, and the global variables like colors, width, height etc., since i dont think they are relevant with what i want to accomplice. Feel free to correct my code, and/or suggest improvements.
As #cmd said above, the area param would be a good option, but for more information, try the pygame docs or have a look at this question or try pygame.transform.chop()
Try the code below:
pygame.init()
size = width, height = 1200, 800
screen = pygame.display.set_mode(size)
image = pygame.image.load("example.png")
rect = image.get_rect()
cropx,cropy = 100,10 #Change value to crop different rect areas
cropRect = (cropx, cropy, rect.w,rect.h)
while(True):
for event in pygame.event.get():
if(event.type == pygame.QUIT):
pygame.quit()
sys.exit()
screen.blit(image,cropRect,cropRect)
pygame.display.update()