04-时钟游戏（利用math模块）

format小数

":.2f".format(3.1415926)

计算机进行三角函数运算时候非常消耗资源，因此可以利用程序加载时间把结果提前运算出来存在数组中．

绘制圆圈

import random, math, sys, pygame
from pygame.locals import *


pygame.init()
screen = pygame.display.set_mode((600,500))
pygame.display.set_caption("CIRCLE!")
screen.fill((0,0,100))

pos_x = 300
pos_y = 250
radius = 200
angle = 360
color = 0,0,0
while True:
    for event in pygame.event.get():
        if event.type == QUIT:
            sys.exit()
        keys = pygame.key.get_pressed()
        if keys[K_ESCAPE]:
            sys.exit()

    angle += 1
    if angle >= 360:
        angle = 0
        r = random.randint(0,255)
        g = random.randint(0, 255)
        b = random.randint(0, 255)
        color = r, g, b

    x = math.cos(math.radians(angle)) * radius
    y = math.sin(math.radians(angle)) * radius

    pos = (int(pos_x + x), int(pos_y + y))
    pygame.draw.circle(screen, color, pos, 10, 0)#这里的参数是指半径为10,实心的小圆圈。参数改成１之后能明显看出端倪

    # pos = (300, 250)
    # pygame.draw.circle(screen, color, pos, 200, 15)


    pygame.display.update()

from datetime import datetime, date, time
import pygame, sys, random, math
from pygame.locals import *


def print_text(font, x, y, text, color=(255,255,255)):
    imgText = font.render(text, True, color)
    screen.blit(imgText, (x,y))


def wrap_angle(angle):
    return abs(angle % 360)

def init_clock_plate( angle_plate=0):
    lis = []
    for i in range(360):
        angle_plate += 1
        # print(angle_plate)
        x = math.cos(math.radians(angle_plate)) * radius
        y = math.sin(math.radians(angle_plate)) * radius
        pos = (int(pos_x + x), int(pos_y + y))
        lis.append(pos)

    return lis



pygame.init()
screen = pygame.display.set_mode((600,500))
white = 255,255,255
pos_x = 300
pos_y = 250
radius = 250
font = pygame.font.Font(None, 36)
orange = 220,180,0
yellow = 255,255,0
pink = 255,100,100
angle_plate = 0
color = 255,255,255 # 设置表盘外圈颜色

list_clock = init_clock_plate()
print(list_clock)
while True:
    for event in pygame.event.get():
        if event.type == QUIT:
            sys.exit()
    keys = pygame.key.get_pressed()
    if keys[K_ESCAPE]:
        sys.exit()

    screen.fill((0,0,0))
    # 绘制表盘
    for i in range(360):
        pos = list_clock[i]
        pygame.draw.circle(screen, color, pos, 10, 1)
    # pygame.draw.circle(screen, white, (pos_x, pos_y), radius, 6)
    r = random.randint(0, 255)
    g = random.randint(0, 255)
    b = random.randint(0, 255)
    color = r, g, b

    # 绘制表盘数字
    for n in range(1, 13):
        angle = math.radians(n*(360/12)-90)
        x = math.cos(angle)*(radius-20)-10
        y = math.sin(angle)*(radius-20)-10
        print_text(font, pos_x+x, pos_y+y, str(n))

    today = datetime.today()
    # print(today.hour)
    if today.hour == 12:
        hours = 12
    else:
        hours = today.hour % 12
    minutes = today.minute
    seconds = today.second

    # 绘制时针
    hour_angle = wrap_angle(hours*(360/12)-90)
    hour_angle = math.radians(hour_angle)
    hour_x = math.cos(hour_angle) * (radius - 80)
    hour_y = math.sin(hour_angle) * (radius - 80)
    target = (pos_x+hour_x, pos_y+hour_y)
    pygame.draw.line(screen, pink, (pos_x,pos_y),target,25)

    # 绘制分针，注意是６０份
    min_angle = wrap_angle(minutes * (360 / 60) - 90)
    min_angle = math.radians(min_angle)
    min_x = math.cos(min_angle) * (radius - 60)
    min_y = math.sin(min_angle) * (radius - 60)
    target = (pos_x + min_x, pos_y + min_y)
    pygame.draw.line(screen, orange, (pos_x, pos_y), target, 12)

    # 绘制秒针
    sec_angle = wrap_angle(seconds * (360 / 60) - 90)
    sec_angle = math.radians(sec_angle)
    sec_x = math.cos(sec_angle) * (radius - 40)
    sec_y = math.sin(sec_angle) * (radius - 40)
    target = (pos_x + sec_x, pos_y + sec_y)
    pygame.draw.line(screen, yellow, (pos_x, pos_y), target, 6)

    #绘制中心圆
    pygame.draw.circle(screen, white, (pos_x, pos_y),20,0)
    print_text(font, 0,0, str(hours)+":"+str(minutes)+":"+str(seconds))
    pygame.display.update()