在pygame中使用PS4控制器，我已经弄清楚如何捕获可以变化为-1或1的轴旋转，但我不知道如何将这些数字转换为颜色环比如缩放以便将其变成十六进制三元组数。
模仿色环的值比任何东西都重要，因为我不希望操纵杆在不运动时捕捉颜色。 Picture
（因为这有点令人困惑，基本上我希望能够移动我的操纵杆并根据它移动的位置捕获准确的十六进制三连音数字）
到目前为止，这是我的代码：
import pygame
# Define some colors
BLACK = ( 0, 0, 0)
WHITE = ( 62, 210, 255)
# This is a simple class that will help us print to the screen
# It has nothing to do with the joysticks, just outputting the
# information.
class TextPrint:
def __init__(self):
self.reset()
self.font = pygame.font.Font(None, 25)
def print(self, screen, textString):
textBitmap = self.font.render(textString, True, BLACK)
screen.blit(textBitmap, [self.x, self.y])
self.y += self.line_height
def reset(self):
self.x = 25
self.y = 25
self.line_height = 30
def indent(self):
self.x += 10
def unindent(self):
self.x -= 10
pygame.init()
# Set the width and height of the screen [width,height]
size = [900, 1080]
screen = pygame.display.set_mode(size)
pygame.display.set_caption("PS4Testing")
#Loop until the user clicks the close button.
done = False
# Used to manage how fast the screen updates
clock = pygame.time.Clock()
# Initialize the joysticks
pygame.joystick.init()
# Get ready to print
textPrint = TextPrint()
# -------- Main Program Loop -----------
while done==False:
# EVENT PROCESSING STEP
for event in pygame.event.get(): # User did something
if event.type == pygame.QUIT: # If user clicked close
done=True # Flag that we are done so we exit this loop
screen.fill(WHITE)
textPrint.reset()
# Get count of joysticks
joystick_count = pygame.joystick.get_count()
# For each joystick:
for i in range(joystick_count):
joystick = pygame.joystick.Joystick(i)
joystick.init()
# Usually axis run in pairs, up/down for one, and left/right for
# the other.
axes = joystick.get_numaxes()
for i in range( axes ):
axis = joystick.get_axis( i )
textPrint.print(screen, "Axis {} value: {:>6.3f}".format(i, axis) )
textPrint.unindent()
# ALL CODE TO DRAW SHOULD GO ABOVE THIS COMMENT
# Go ahead and update the screen with what we've drawn.
pygame.display.flip()
# Limit to 20 frames per second
clock.tick(20)
# Close the window and quit.
# If you forget this line, the program will 'hang'
# on exit if running from IDLE.
pygame.quit ()
来自official pygame documentation 的修改代码
非常感谢任何帮助
答案 0 :(得分：1)
我的计划：
首先，我们需要找到操纵杆的角度。我们可以使用law of cosines和轴语句作为三角形边长（因为它们来自一个点/中心）。
在此块中存储轴语句：
for i in range( axes ):
axis = joystick.get_axis( i )
#Storing axis statement
if i == 0:
Xaxis = axis
elif i == 1:
Yaxis = axis
textPrint.print(screen, "Axis {} value: {:>6.3f}".format(i, axis) )
我们存储它们，因为在for循环中我们一次只能使用一个语句。
然后定义一个返回操纵杆角度的功能。我们需要将math模块用于pi和acos。
def get_angle(Xaxis,Yaxis):
#To avoid ZeroDivisionError
#P.S. - you can improve it a bit.
if Xaxis == 0:
Xaxis = 0.001
if Yaxis == 0:
Yaxis = 0.001
#defining the third side of a triangle using the Pythagorean theorem
b = ((Xaxis)**2 + (Yaxis)**2)**0.5
c = Xaxis
a = Yaxis
#Using law of cosines we'll find angle using arccos of cos
#math.acos returns angles in radians, so we need to multiply it by 180/math.pi
angle = math.acos((b**2 + c**2 - a**2) / (2*b*c)) * 180/math.pi
#It'll fix angles to be in range of 0 to 360
if Yaxis > 0:
angle = 360 - angle
return angle
现在get_angle(Xaxis,Yaxis)将返回棍子的角度。东为0°，北为90°，西为180°，南为270°。
我们有棍子的角度，我们可以用它来制作HSV颜色，然后将其转换为RGB，因为色轮是基于颜色的色调。
Hue与棒的角度相同，所以我们可以使用棒的角度作为色调。
使用Wikipedia中的公式，定义一个将HSV转换为RGB的函数。
def hsv_to_rgb(H,S,V):
#0 <= H <= 360
#0 <= S <= 1
#0 <= V <= 1
C = V * S
h = H/60
X = C * (1 - abs(h % 2 -1))
#Yes, Python can compare like "0 <= 2 > 1"
if 0 <= h <= 1:
r = C; g = X; b = 0
elif 1 <= h <= 2:
r = X; g = C; b = 0
elif 2 <= h <= 3:
r = 0; g = C; b = X
elif 3 <= h <= 4:
r = 0; g = X; b = C
elif 4 <= h <= 5:
r = X; g = 0; b = C
elif 5 <= h < 6:
r = C; g = 0; b = X
m = V - C
#Final computing and converting from 0 - 1 to 0 - 255
R = int((r+m)*255)
G = int((g+m)*255)
B = int((b+m)*255)
return [R,G,B]
现在hsv_to_rgb(get_angle(Xaxis,Yaxis),1,1)将返回0到255范围内的红色，绿色和蓝色列表（以十六进制更容易转换）。在这种情况下，不需要饱和度和值。
最简单的部分。我们需要获取RGB列表并将值转换为十六进制。
colors = hsv_to_rgb(get_angle(Xaxis,Yaxis),1,1)
#Converting to hex
lst = list(map(hex,colors))
#Cutting the "0x" part
for i in range(len(lst)):
lst[i] = lst[i][2:]
#If one of the colors has only one digit, extra 0 will be added for a better look
if len(lst[i]) == 1:
lst[i] = "0"+str(lst[i])
print(get_angle(Xaxis,Yaxis))
将打印#ff0000，#00ff00和#0000ff之类的内容。
您还可以让程序实时显示颜色变化，只需在此块中添加WHITE = colors即可。 如果您患有光敏性癫痫症，请勿使用它。
将第一和第二点的两个函数放在开头的某个位置。
将存储从第一个点添加到块
for i in range( axes ):
axis = joystick.get_axis( i )
textPrint.print(screen, "Axis {} value: {:>6.3f}".format(i, axis) )
从块后面的第三个点添加转换。我建议制作一个死亡区域功能。
death_zone = 0.1
if abs(Xaxis) > death_zone or abs(Yaxis) > death_zone:
#If you prefer HSV color wheel, use hsv_to_rgb(get_angle(Xaxis,Yaxis),1,1)
#Else if you prefer RGB color wheel, use hsv_to_rgb(360-get_angle(Xaxis,Yaxis),1,1)
colors = hsv_to_rgb(get_angle(Xaxis,Yaxis),1,1)
#Converting to hex
lst = list(map(hex,colors))
#Cutting the "0x" part
for i in range(len(lst)):
lst[i] = lst[i][2:]
#If one of the colors has only one digit, extra 0 will be added for a better look
if len(lst[i]) == 1:
lst[i] = "0"+str(lst[i])
print("#"+"".join(lst))
这就是你的代码可能看起来的样子：
P.S。 - 你可能不得不改变一些代码，因为我操纵杆的轴没有被正确捕获。
import pygame
import math
# Define some colors
BLACK = ( 0, 0, 0)
WHITE = ( 62, 210, 255)
def hsv_to_rgb(H,S,V):
#Accirding to https://en.wikipedia.org/wiki/HSL_and_HSV#From_HSV
#0 <= H <= 360
#0 <= S <= 1
#0 <= V <= 1
C = V * S
h = H/60
X = C * (1 - abs(h % 2 -1))
#Yes, Python can compare like "0 <= 2 > 1"
if 0 <= h <= 1:
r = C; g = X; b = 0
elif 1 <= h <= 2:
r = X; g = C; b = 0
elif 2 <= h <= 3:
r = 0; g = C; b = X
elif 3 <= h <= 4:
r = 0; g = X; b = C
elif 4 <= h <= 5:
r = X; g = 0; b = C
elif 5 <= h < 6:
r = C; g = 0; b = X
m = V - C
#Final computing and converting from 0 - 1 to 0 - 255
R = int((r+m)*255)
G = int((g+m)*255)
B = int((b+m)*255)
return [R,G,B]
def get_angle(Xaxis,Yaxis):
#To avoid ZeroDivisionError
#P.S. - you can improve it a bit.
if Xaxis == 0:
Xaxis = 0.001
if Yaxis == 0:
Yaxis = 0.001
#defining the third side of a triangle using the Pythagorean theorem
b = ((Xaxis)**2 + (Yaxis)**2)**0.5
c = Xaxis
a = Yaxis
#Using law of cosines we'll fing angle using arccos of cos
#math.acos returns angles in radians, so we need to multiply it by 180/math.pi
angle = math.acos((b**2 + c**2 - a**2) / (2*b*c)) * 180/math.pi
#It'll fix angles to be in range of 0 to 360
if Yaxis > 0:
angle = 360 - angle
return angle
# This is a simple class that will help us print to the screen
# It has nothing to do with the joysticks, just outputting the
# information.
class TextPrint:
def __init__(self):
self.reset()
self.font = pygame.font.Font(None, 25)
def print(self, screen, textString):
textBitmap = self.font.render(textString, True, BLACK)
screen.blit(textBitmap, [self.x, self.y])
self.y += self.line_height
def reset(self):
self.x = 25
self.y = 25
self.line_height = 30
def indent(self):
self.x += 10
def unindent(self):
self.x -= 10
pygame.init()
# Set the width and height of the screen [width,height]
size = [900, 1080]
screen = pygame.display.set_mode(size)
pygame.display.set_caption("PS4Testing")
#Loop until the user clicks the close button.
done = False
# Used to manage how fast the screen updates
clock = pygame.time.Clock()
# Initialize the joysticks
pygame.joystick.init()
# Get ready to print
textPrint = TextPrint()
# -------- Main Program Loop -----------
while done==False:
# EVENT PROCESSING STEP
for event in pygame.event.get(): # User did something
if event.type == pygame.QUIT: # If user clicked close
done=True # Flag that we are done so we exit this loop
screen.fill(WHITE)
textPrint.reset()
# Get count of joysticks
joystick_count = pygame.joystick.get_count()
# For each joystick:
for i in range(joystick_count):
joystick = pygame.joystick.Joystick(i)
joystick.init()
# Usually axis run in pairs, up/down for one, and left/right for
# the other.
axes = joystick.get_numaxes()
for i in range( axes ):
axis = joystick.get_axis( i )
#Storing axis statement
if i == 0:
Xaxis = axis
elif i == 1:
Yaxis = axis
textPrint.print(screen, "Axis {} value: {:>6.3f}".format(i, axis) )
textPrint.unindent()
#If joystick is not in the center
#Death zone is used to not capture joystick if it's very close to the center
death_zone = 0.1
if abs(Xaxis) > death_zone or abs(Yaxis) > death_zone:
#If you prefer HSV color wheel, use hsv_to_rgb(get_angle(Xaxis,Yaxis),1,1)
#Else if you prefer RGB color wheel, use hsv_to_rgb(360-get_angle(Xaxis,Yaxis),1,1)
colors = hsv_to_rgb(get_angle(Xaxis,Yaxis),1,1)
#Converting to hex
lst = list(map(hex,colors))
#Cutting the "0x" part
for i in range(len(lst)):
lst[i] = lst[i][2:]
#If one of the colors has only one digit, extra 0 will be added for a better look
if len(lst[i]) == 1:
lst[i] = "0"+str(lst[i])
print("#"+"".join(lst))
#You can use it to see color change in real time.
#But I don't recomend to use it if you have photosensitive epilepsy.
#WHITE = colors
# ALL CODE TO DRAW SHOULD GO ABOVE THIS COMMENT
# Go ahead and update the screen with what we've drawn.
pygame.display.flip()
# Limit to 20 frames per second
clock.tick(20)
# Close the window and quit.
# If you forget this line, the program will 'hang'
# on exit if running from IDLE.
pygame.quit ()