Retro look Analog style VU meter on VFD display with Arduino Nano

1#include <U8g2lib.h>
2#include <SPI.h>
3
4#define GAIN      100
5#define STEP      8
6#define LOW_SOUND 50
7#define MAX_SOUND 600
8
9 
10U8G2_GP1287AI_256X50_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ 8); 
11
12  int strela=-36;
13  int hMeter = 64;                      
14  int vMeter = 85;                      
15  int rMeter = 77;
16  int ur,urr,x;
17
18  int strelax =-36;
19  int hMeterx = 194;                      
20  int vMeterx = 85;                      
21  int rMeterx = 77;
22  int urx,urrx,xx;
23 
24void setup(void) {
25  u8g2.begin(); 
26  u8g2.setContrast(25); 
27  u8g2.enableUTF8Print();
28  u8g2.setFont(u8g2_font_4x6_tf);
29  analogReference(INTERNAL);  // если очень маленький уровень сигнала
30  pinMode(A2,INPUT);
31  pinMode(A0,INPUT);
32}
33
34void loop (){
35 
36  strela = map(log(analogRead(A2))*GAIN, LOW_SOUND,MAX_SOUND, -36,36);
37  strela = constrain(strela, -36, 36);
38  urr = strela;if(urr<ur){ur=ur-STEP;}else{ur = strela;}  
39
40
41  strelax = map(log(analogRead(A0))*GAIN, LOW_SOUND,MAX_SOUND, -36,36);
42  strelax = constrain(strelax, -36, 36);
43  urrx = strelax;if(urrx<urx){urx=urx-STEP;}else{urx = strelax;}  
44
45
46  u8g2.firstPage();
47  do { 
48  u8g2.drawFrame(0,0,256,50);  
49  u8g2.drawRFrame(130,2,124,46,3); 
50  u8g2.drawRFrame(2,2,127,46,3);
51  u8g2.drawLine(20, 15, 70, 15);// line 1
52  u8g2.drawLine(150, 15, 200, 15);
53  u8g2.drawLine(73, 15, 108, 15);
54  u8g2.drawLine(203, 15, 238, 15);
55  u8g2.drawLine(73, 14, 108, 14);// line 2
56  u8g2.drawLine(203, 14, 238, 14);
57  u8g2.drawLine(15, 17, 70, 17);// line3 
58  u8g2.drawLine(145, 17, 200, 17); 
59
60  byte b1_2[10]{20,57,42,33,64,91,50,70,77,104};
61  byte c1_2[10]{12,14,14,12,14,12,12,12,12,12};
62  for(int i=0;i<10;i++){u8g2.drawLine(b1_2[i], 15, b1_2[i], c1_2[i]);} 
63  byte b3[5]{15,29,43,57,70};
64  for(int i=0;i<5;i++){u8g2.drawLine(b3[i], 17, b3[i], 20);}
65
66
67  byte b1x_2[10]{150,187,172,163,194,221,180,200,207,234};
68  byte c1x_2[10]{12,14,14,12,14,12,12,12,12,12};
69  for(int i=0;i<10;i++){u8g2.drawLine(b1x_2[i], 15, b1x_2[i], c1x_2[i]);} 
70  byte b3x[5]{145,159,173,187,200};
71  for(int i=0;i<5;i++){u8g2.drawLine(b3x[i], 17, b3x[i], 20);}
72  
73
74  u8g2.setCursor(17, 10); u8g2.print(F("20 10   3    0 1"));
75  u8g2.setCursor(147, 10); u8g2.print(F("20 10   3    0 1"));
76  u8g2.setCursor(14, 28); u8g2.print(F("0  25"));
77  u8g2.setCursor(144, 28); u8g2.print(F("0  25"));
78  u8g2.setCursor(40, 28);  u8g2.print(F("50"));
79  u8g2.setCursor(170, 28);  u8g2.print(F("50"));
80  u8g2.setCursor(55, 28);u8g2.print(F("75"));
81  u8g2.setCursor(185, 28);u8g2.print(F("75"));
82  u8g2.setCursor(68, 28);u8g2.print(F("100"));
83  u8g2.setCursor(198, 28);u8g2.print(F("100"));
84  u8g2.setCursor(90, 10);u8g2.print(F("2"));
85  u8g2.setCursor(220, 10);u8g2.print(F("2"));
86  u8g2.setCursor(103, 10);u8g2.print(F("3"));
87  u8g2.setCursor(233, 10);u8g2.print(F("3"));
88  
89  u8g2.setCursor(14, 40); u8g2.print(F("-"));
90  u8g2.setCursor(104, 40);u8g2.print(F("+"));
91  u8g2.setCursor(44, 40);u8g2.print(F("VU meter"));
92 
93  u8g2.setCursor(90, 40);u8g2.print(F("L"));
94  u8g2.drawFrame(88,33,7,9);
95  
96  u8g2.setCursor(144, 40); u8g2.print(F("-"));
97  u8g2.setCursor(234, 40);u8g2.print(F("+"));
98  u8g2.setCursor(174, 40);u8g2.print(F("VU meter"));
99
100  u8g2.setCursor(220, 40);u8g2.print(F("R"));
101  u8g2.drawFrame(218,33,7,9);
102
103  int a1 = (hMeter + (sin(ur / 57.296) * rMeter)); // meter needle horizontal coordinate
104  int a2 = (vMeter - (cos(ur / 57.296) * rMeter)); // meter needle vertical coordinate
105  u8g2.drawLine(a1, a2, hMeter, vMeter);
106 // u8g2.drawLine(a1-1, a2-1, hMeter-1, vMeter+1);
107
108
109  int a1x = (hMeterx + (sin(urx / 57.296) * rMeterx)); // meter needle horizontal coordinate
110  int a2x = (vMeterx - (cos(urx / 57.296) * rMeterx)); // meter needle vertical coordinate
111  u8g2.drawLine(a1x, a2x, hMeterx, vMeterx);
112 // u8g2.drawLine(a1x-1, a2x-1, hMeterx-1, vMeterx+1);
113
114
115  
116  } while ( u8g2.nextPage() );  
117  
118}