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将操纵杆轴值转换为十六进制三元组代码

joystick pygame colors python

1

ark.pytm · 技术社区 · 7 年前

在pygame中使用PS4控制器,我已经知道如何捕捉轴旋转,轴旋转可以变化为-1或1,但我不知道如何将这些数字转换为色环将其转换为十六进制三元组数。
模拟颜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
(因为这有点让人困惑,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元组编号)

这是我目前的代码:

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 ()

修改代码自 official pygame documentation
任何帮助都将不胜感激

1 回复 | 直到 7 年前

1

OSA413 7 年前

我的计划:

查找斗杆式操纵手柄的角度
使用HSV和斗杆角度获取RGB值
转换为十六进制

查找操纵手柄斗杆的角度

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的长度(因为它们来自一个点/中心)。

在此块中存储axis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) )

我们存储它们是因为在for循环中,一次只能获取一条语句。

然后定义一个返回斗杆角度的函数。我们需要使用 math 的模块 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) 将返回斗杆的角度。东为0°,北为90°,西为180°,南为270°。

获取HSV并转换为RGB

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。

色调的范围与木棍的角度相同,因此我们可以使用木棍的角度作为色调。

使用中的公式 Wikipedia ,定义将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0-255范围内的红色、绿色和蓝色列表(以便于十六进制转换)。在这种情况下,不需要饱和度和值。

转换为十六进制

最简单的部分。我们需要得到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))

类似于 #ff0000 , #00ff00 和 #0000ff 将打印。

您还可以使您的程序实时显示颜色变化,只需添加 WHITE = colors 在这个街区。 如果你患有光敏性癫痫,不要使用它。

合并所有内容

将两个函数从第一点和第二点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) )

从块后的第三个点添加转换。我建议创建死亡区功能。

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))

这就是您的代码的外观:

P、您可能需要更改一些代码,因为我想我的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 ()