pygameの：どのように回転するRectangle時計回り/反時計回りへの入力に応じて、

aTALLindian：

私はこれまで、ユーザーのマウスに追従して回転し、反時計回りに、1つの四角形を作っているaと、キーと右回りdキー。

現在、矩形は、マウスに従いますが、ユーザーが矩形を回転させ始めると、長方形は非常にラグと醜くなりました。私は同じと一定のFPS長方形を維持して助けを必要としています。ご協力ありがとうございました！

ここでは、コードは次のようになります。

import pygame as py  

# define constants  
WIDTH = 500  
HEIGHT = 500  
FPS = 200

# define colors  
BLACK = (0 , 0 , 0)  
GREEN = (0 , 255 , 0)

# initialize pygame and create screen  
py.init()  
screen = py.display.set_mode((WIDTH , HEIGHT))  
# for setting FPS  
clock = py.time.Clock()  

rot = 0  
rot_speed = 2  

# define a surface (RECTANGLE)  
image_orig = py.Surface((1 , 100))  
# for making transparent background while rotating an image  
image_orig.set_colorkey(BLACK)  
# fill the rectangle / surface with green color  
image_orig.fill(GREEN)  
# creating a copy of orignal image for smooth rotation  
image = image_orig.copy()  
image.set_colorkey(BLACK)  
# define rect for placing the rectangle at the desired position  
rect = image.get_rect()
x, y = py.mouse.get_pos()
rect.center = (x, y)  
# keep rotating the rectangle until running is set to False
running = True  
while running:  

    x, y = py.mouse.get_pos()
    # set FPS  
    clock.tick(FPS)  
    # clear the screen every time before drawing new objects  
    screen.fill(BLACK)  
    # check for the exit  
    for event in py.event.get():  
        if event.type == py.QUIT:  
            running = False
    # making a copy of the old center of the rectangle  
    old_center =(x, y)
    # defining angle of the rotation  
    rot = (rot + rot_speed) % 360  
    # rotating the orignal image
    keys = py.key.get_pressed()
    rot_speed = .2 
    image_orig = py.transform.rotate(image_orig , 0)  
    rect = image_orig.get_rect()  
        # set the rotated rectangle to the old center  
    rect.center = (x, y)  
        # drawing the rotated rectangle to the screen  
    screen.blit(image_orig , rect)  
        # flipping the display after drawing everything  
    py.display.flip()
    if(keys[py.K_a]):
        rot_speed = .2 
        image_orig = py.transform.rotate(image_orig , rot)  
        rect = image_orig.get_rect()  
        # set the rotated rectangle to the old center  
        rect.center = (x, y)  
        # drawing the rotated rectangle to the screen  
        screen.blit(image_orig , rect)  
        # flipping the display after drawing everything  
        py.display.flip()
    if(keys[py.K_d]):
        rot_speed = -.2 
        image_orig = py.transform.rotate(image_orig , rot)  
        rect = image_orig.get_rect()  
        # set the rotated rectangle to the old center  
        rect.center = (x, y)  
        # drawing the rotated rectangle to the screen  
        screen.blit(image_orig , rect)  
        # flipping the display after drawing everything  
        py.display.flip()
    rect.center = (x, y)

py.quit()

Rabbid76：

市長の問題は、連続的に回転して元の画像を操作することです。画像が歪んでされることを引き起こすこと。参照してください。私はpygameのを使用して、その中心の周りに画像を回転させるにはどうすればよいですか？

画像の新しい角度を計算します。

rot = (rot + rot_speed) % 360

その中心の周りを回転させて新しいイメージを作成します。

image = py.transform.rotate(image_orig, rot)  
rect = image.get_rect(center = (x, y))

そして、blit回転した画像：

screen.blit(image, rect)

ときAやD、新しい方向がで設定されている押されてrot_speed = .2それぞれrot_speed = -.2。

完全なサンプルコード：

import pygame as py  

# define constants  
WIDTH = 500  
HEIGHT = 500  
FPS = 200

# define colors  
BLACK = (0 , 0 , 0)  
GREEN = (0 , 255 , 0)

# initialize pygame and create screen  
py.init()  
screen = py.display.set_mode((WIDTH , HEIGHT))  
# for setting FPS  
clock = py.time.Clock()  

rot = 0  
rot_speed = .2  

# define a surface (RECTANGLE)  
image_orig = py.Surface((1 , 100))  
# for making transparent background while rotating an image  
image_orig.set_colorkey(BLACK)  
# fill the rectangle / surface with green color  
image_orig.fill(GREEN)  
# creating a copy of orignal image for smooth rotation  
image = image_orig.copy()  
image.set_colorkey(BLACK)  
# define rect for placing the rectangle at the desired position  
rect = image.get_rect()
x, y = py.mouse.get_pos()
rect.center = (x, y)  
# keep rotating the rectangle until running is set to False

running = True  
while running:  

    x, y = py.mouse.get_pos()
    # set FPS  
    clock.tick(FPS)  
    # clear the screen every time before drawing new objects  
    screen.fill(BLACK)  
    # check for the exit  
    for event in py.event.get():  
        if event.type == py.QUIT:  
            running = False

    # rotating the orignal image
    keys = py.key.get_pressed()
    if keys[py.K_a]:
        rot_speed = .2 
    if keys[py.K_d]:
        rot_speed = -.2 

    # defining angle of the rotation  
    rot = (rot + rot_speed) % 360  
    # rotating the orignal image
    image = py.transform.rotate(image_orig, rot)  
    rect = image.get_rect(center = (x, y))  
    # drawing the rotated rectangle to the screen  
    screen.blit(image, rect)  
    # flipping the display after drawing everything  
    py.display.flip()

py.quit()

pygameの：どのように回転するRectangle時計回り/反時計回りへの入力に応じて、

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