尝试使用 PYGame 改变 Python 仪表的颜色

Question

我正在尝试将此仪表用作速度计或转速计。现在它更像是一个电量计。我发现改变颜色具有挑战性。代码没有很好的注释。如果有更好的方法来解决这个问题，更好的编码工具、库和方法来创建各种动画仪表，我很感兴趣。我在最新的 Debian 上运行使用 Python 3.7。任何想法都非常合适。它正在从 USB 端口获取数据。我也添加了随机例程。

import pygame as py
import pygame.gfxdraw
import math
import serial
from random import randint

#ser = serial.Serial('/dev/ttyUSB0',9600)

class Gauge:

    def __init__(self, screen, FONT, x_cord, y_cord, thickness, radius, circle_colour, glow=True):
        self.screen = screen
        self.Font = FONT
        self.x_cord = x_cord
        self.y_cord = y_cord
        self.thickness = thickness
        self.radius = radius
        self.circle_colour = circle_colour
        self.glow = glow

    def draw(self, percent):
        fill_angle = int(percent*270/100)
        per=percent
        if percent > 100:
            percent = 100
        if per <=40:
            per=0
        if per > 100:
            per = 100
        ac = [int(255-per*255/100),int(per*255/100),int(0), 255]
        for indexi in range(len(ac)):
            if ac[indexi] < 0:
                ac[indexi] = 0
            if ac[indexi] > 255:
                ac[indexi] = 255
        print(ac)
        pertext = self.Font.render(str(percent) + "%", True, ac)
        pertext_rect = pertext.get_rect(center=(int(self.x_cord), int(self.y_cord)))
        self.screen.blit(pertext, pertext_rect)
        for i in range(0, self.thickness):
            pygame.gfxdraw.arc(screen, int(self.x_cord), int(self.y_cord), self.radius - i, -225, 270 - 225, self.circle_colour)
            if percent >4:
                pygame.gfxdraw.arc(screen, int(self.x_cord), int(self.y_cord), self.radius - i, -225, fill_angle - 225-8, ac)
        if percent < 4:
            return
        if self.glow:
            for i in range(0,15):
                ac [3] = int(150 - i*10)
                pygame.gfxdraw.arc(screen, int(self.x_cord), int(self.y_cord), self.radius + i, -225, fill_angle - 225-8, ac)
            for i in range(0,15):
                ac [3] = int(150 - i*10)
                pygame.gfxdraw.arc(screen, int(self.x_cord), int(self.y_cord), self.radius -self.thickness - i, -225, fill_angle - 225-8, ac)
            angle_r = math.radians(fill_angle-225-8)
            lx,ly = int((self.radius-self.thickness/2)*math.cos(angle_r)), int( (self.radius-self.thickness/2)*math.sin(angle_r))
            ac[3] = 255
            lx = int(lx+self.x_cord)
            ly = int(ly + self.y_cord)
            pygame.draw.circle(self.screen,ac,(lx,ly),int(self.thickness/2),0)
            for i in range(0,10):
                ac [3] = int(150 - i*15)
                pygame.gfxdraw.arc(screen, int(lx), int(ly), (self.thickness//2)+i , fill_angle -225-10, fill_angle - 225-180-10, ac)
if __name__ == '__main__':
    bg_c = (56, 56, 56)
#    circle_c = (55, 77, 91)
    circle_c = (126, 245, 95)

    pygame.init()
    #width, height = (640, 480)
    width = 640
    height = 480
    background = py.image.load("gaugebg.png") ## Load the image file
    background = py.transform.scale(background,(630,520)) ## Make it the same size as the screen
    clock = pygame.time.Clock()
    screen = pygame.display.set_mode((width, height))
    pygame.display.set_caption('Wahaj Gauge Pygame')
    fps = 6
    FONT = pygame.font.SysFont('ARIAL', 75)
    my_gauge = Gauge(
        screen=screen,
        FONT=FONT,
        x_cord=width / 2,
        y_cord=height / 2,
        thickness=50,
        radius=200,
        circle_colour=circle_c,
        glow=False)
    percentage = 0
    ifdelay = 0
    while True:
        # FOR SHOWING CHANGE IN GAUGE
     # rangauge = ser.readline()
     # percentage = int(rangauge)
      screen.blit(background,(0,0)) ## Blit the background onto the screen first
      percentage=randint(77, 84)
           # percentage = 0
         #       screen.fill(bg_c)
      #my_gauge.draw(percent=20)
      my_gauge.draw(percent=percentage)
      pygame.display.update()
      clock.tick(fps)

Answer 1

仪表的颜色由线条定义

ac = [int(255-per*255/100),int(per*255/100),int(0), 255]

选择不同的颜色或根据 self.circle_colour 定义颜色。尝试不同的功能：

ac = [int(self.circle_colour[0] * per/100),
      int(self.circle_colour[1] * per/100),
      int(self.circle_colour[2] * per/100)]

或

ac = [255-int(self.circle_colour[0] * per/100),
      255-int(self.circle_colour[1] * per/100),
      255-int(self.circle_colour[2] * per/100)]

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