pyGame, rotate image in mouse direction?

[KoolPenguin]

I'm trying to get my mouse image to rotate and point in the direction the mouse is moving. For example, I have a space craft image that moves with the mouse and would like to rotate it to the correct angle and point in that direction. The code below is what I have and the image does rotate when the mouse moves but not correctly.



def game(screen_resolution = (800, 600), fullscreen = False):
pygame.init()

if fullscreen:
screen = pygame.display.set_mode((screen_resolution[0],screen_resolution[1]), pygame.FULLSCREEN)
else:
screen = pygame.display.set_mode((screen_resolution[0],screen_resolution[1]))

background = pygame.Surface(screen.get_size())
background.fill((255,255,255))
background = background.convert()

mouse_image = pygame.image.load(mif).convert_alpha()
pygame.mouse.set_visible(False)

clock = pygame.time.Clock()
FPS = 30
game_playtime = 0.0
playgame = True

while playgame is True:
milliseconds = clock.tick(FPS)
game_playtime += milliseconds / 1000.0

x, y = pygame.mouse.get_pos()

angle = atan2((y-300), (x-400))
mouse_cursor = pygame.transform.rotate(mouse_image, degrees(angle))

x -= mouse_cursor.get_width()/2
y -= mouse_cursor.get_height()/2

screen.blit(background, (0, 0))
screen.blit(mouse_cursor, (x, y))

for event in pygame.event.get():
if event.type == pygame.QUIT:
playgame = False
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_ESCAPE:
playgame = False

pygame.display.set_caption('Press ESC to quit. FPS: %.2f (%ix%i), time: %.2f seonds' % (clock.get_fps(),
screen_resolution[0],
screen_resolution[1], game_playtime))
pygame.display.flip()

pygame.mouse.set_visible(True)



Thanks for any help that can be provided.

--
Chris

[KoolPenguin]

Made some changes to the angle calculations, works better but still not correct. Here is the updated code and a video showing how it currently works. The image still doesn't point 100% in the direction of the mouse and does not rotate quick enough with the mouse motion.

Still would appreciate any help.



# mouse image file
mif = os.path.join('images', 'space_craft.png')


def game(screen_resolution = (800, 600), fullscreen = False):
# initialize pygame system
pygame.init()

# set to fullscreen or window size
if fullscreen:
screen = pygame.display.set_mode((screen_resolution[0],screen_resolution[1]), pygame.FULLSCREEN)
else:
screen = pygame.display.set_mode((screen_resolution[0],screen_resolution[1]))

# set background screen
background = pygame.Surface(screen.get_size())
background.fill((255,255,255))
background = background.convert()

# load mouse image and rotate 90 degrees
mouse_image = pygame.image.load(mif).convert_alpha()
mouse_image = pygame.transform.rotate(mouse_image, 90)

# hide mouse cursor
pygame.mouse.set_visible(False)

clock = pygame.time.Clock()
FPS = 30
game_playtime = 0.0
playgame = True

# play game while true
while playgame is True:

milliseconds = clock.tick(FPS)

# game time played in seconds
game_playtime += milliseconds / 1000.0

# get current mouse position
x, y = pygame.mouse.get_pos()

# get center of screen
res_x = screen_resolution[0] / 2
res_y = screen_resolution[1] / 2

# get rotation angle of mouse location relative to center of screen
angle = atan2((res_y - y), (x - res_x)) / pi * 2.0
mouse_cursor = pygame.transform.rotate(mouse_image, degrees(angle))

# set mouse cursor center of mouse image
x -= mouse_cursor.get_width() / 2
y -= mouse_cursor.get_height() / 2

# put background and mouse cursor image to screen
screen.blit(background, (0, 0))
screen.blit(mouse_cursor, (x, y))

# user inputs
for event in pygame.event.get():

if event.type == pygame.QUIT:
playgame = False
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_ESCAPE:
playgame = False

# update window caption
pygame.display.set_caption('Press ESC to quit. FPS: %.2f (%ix%i), time: %.2f seonds' % (clock.get_fps(),
screen_resolution[0],
screen_resolution[1], game_playtime))
# update the screen
pygame.display.flip()

# show mouse cursor
pygame.mouse.set_visible(True)



Video showing how it current works:

http://www.youtube.com/watch?v=0KJ7Z1RGo4k

Thanks
--
Chris

[sed0i97.1nc]

Огромное спасибо!
Думаю лучше сделать так:


if x > mouse_x:
self.d = math.atan2((mouse_y - y), (x - base.mouse_x)) / math.pi * 2.0

if x < mouse_x:
self.d = math.atan2((mouse_y - y), (x - base.mouse_x)) / math.pi * 3.0