ESP8266版本的飘雪圣诞树

#1

使用ESP8266/ESP32，控制16x16的WS2812彩屏，显示飘雪圣诞树动画效果。完整程序和说明请见社区的github。

代码：全选

from machine import Pin
import neopixel
import random
from time import sleep_ms

def rand(n):
    return random.getrandbits(16)%n

class neo16x16_img:
    def __init__(self, pin):
        self.np = neopixel.NeoPixel(pin, 256)
   
    def clear(self):
        self.np.fill((0,0,0))
        self.np.write()

    def set(self, n, color):
        self.np[n] = color
        self.np.write()

    def show(self,dat,pos=0,update=1):
        for x in range(16):
            for y in range(8):
                if ((x+pos)*8)&gt;=len(dat):
                    self.np[x*16+y*2]=(0,0,0)
                    self.np[x*16+y*2+1]=(0,0,0)
                else:
                    t=dat[(x+pos)*8+y]
                    r=t%16
                    g=(t&gt;&gt;4)%16
                    b=(t&gt;&gt;8)%16
                    if pos%2:
                        self.np[x*16+y*2]=(r,g,b)
                    else:
                        self.np[x*16+15-y*2]=(r,g,b)
                    r=(t&gt;&gt;12)%16
                    g=(t&gt;&gt;16)%16
                    b=(t&gt;&gt;20)%16
                    if pos%2:
                        self.np[x*16+y*2+1]=(r,g,b)
                    else:
                        self.np[x*16+14-y*2]=(r,g,b)
        if update:
            self.np.write()

np = neo16x16_img(Pin(2))

npd=[
0x000FFF, 0x080000, 0x000000, 0x000000,
0x000000, 0x000000, 0x000000, 0x000000,
0x000000, 0x000000, 0x000000, 0x000000,
0x080000, 0x080000, 0x000080, 0xFFF000,
0x000FFF, 0x080000, 0x080080, 0x080080,
0x000000, 0x000000, 0x000000, 0x000000,
0x000000, 0x000000, 0x000000, 0x080000,
0x080080, 0x080080, 0x069080, 0xFFF069,
0x000FFF, 0x080000, 0x080080, 0x080080,
0x000000, 0x000000, 0x000000, 0x000000,
0x000000, 0x000000, 0x000000, 0x000000,
0x080000, 0x080000, 0x000080, 0xFFF000,
0x000FFF, 0x080000, 0x000000, 0x000000,
0x000000, 0x000000, 0x000000, 0x000000,
0x000000, 0x000000, 0x000000, 0x000000,
0x000000, 0x000000, 0x000000, 0xFFF000,
0x000FFF, 0x000000, 0x000000, 0x000000,
0x000000, 0x000000, 0x000000, 0x000000,
0x000000, 0x000000, 0x000000, 0x000000,
0x000000, 0x000000, 0x000000, 0xFFF000,
0x000FFF, 0x000000, 0x000000, 0x000000,
0x000000, 0x000000, 0x000000, 0x000000,
0x000000, 0x000000, 0x000000, 0x000000,
0x000000, 0x000000, 0x000000, 0xFFF000,
0x000FFF, 0x000000, 0x000000, 0x000000,
0x000000, 0x000000, 0x000000, 0x000000,
0x000000, 0x000000, 0x000000, 0x000000,
0x000000, 0x000000, 0x000000, 0xFFF000,
0x000FFF, 0x000000, 0x000000, 0x000000,
0x000000, 0x000000, 0x000000, 0x000000,
0x000000, 0x000000, 0x000000, 0x000000,
0x000000, 0x000000, 0x000000, 0xFFF000,
]

# 0: y, 1: x, 2:bright
snow = []
np.show(npd)

while True:
    if len(snow) &gt; 0:
        np.show(npd, update=0)
        for i in range(len(snow)):
            snow[i][0]+=1
            snow[i][1]+=1-rand(3)
            snow[i][1]=max(0, min(snow[i][1], 15))
            y=snow[i][0]
            x=snow[i][1]
            br=snow[i][2]
            if x%2:
                np.np[x*16+15-y]=[br,br,br]
            else:
                np.np[x*16+y]=[br,br,br]
        if snow[0][0]&gt;14:
            t=snow.pop(0)
        np.np.write()

    if rand(3) == 0:
        snow.append([0, rand(16), rand(15)+1])
   
    sleep_ms(50+rand(100))