Virtual Color Mixer

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1/*
2
3  This example reads three analog sensors (potentiometers are easiest) and sends
4
5  their values serially. The Processing and Max/MSP programs at the bottom take
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7  those three values and use them to change the background color of the screen.
8
9  The circuit:
10
11  - potentiometers attached to analog inputs 0, 1, and 2
12
13  created 2 Dec 2006
14
15  by David A. Mellis
16
17  modified 30 Aug 2011
18
19  by Tom Igoe and Scott Fitzgerald
20
21  This example code is in the public domain.
22
23  https://www.arduino.cc/en/Tutorial/VirtualColorMixer
24
25*/
26
27const int redPin = A0;      // sensor to control red color
28
29const int greenPin = A1;    // sensor to control green color
30
31const int bluePin = A2;     // sensor to control blue color
32
33void setup() {
34
35  Serial.begin(9600);
36}
37
38void loop() {
39
40  Serial.print(analogRead(redPin));
41
42  Serial.print(",");
43
44  Serial.print(analogRead(greenPin));
45
46  Serial.print(",");
47
48  Serial.println(analogRead(bluePin));
49}
50
51/* Processing code for this example
52
53  // This example code is in the public domain.
54
55  import processing.serial.*;
56
57  float redValue = 0;        // red value
58
59  float greenValue = 0;      // green value
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61  float blueValue = 0;       // blue value
62
63  Serial myPort;
64
65  void setup() {
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67    size(200, 200);
68
69    // List all the available serial ports
70
71    // if using Processing 2.1 or later, use Serial.printArray()
72
73    println(Serial.list());
74
75    // I know that the first port in the serial list on my Mac is always my
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77    // Arduino, so I open Serial.list()[0].
78
79    // Open whatever port is the one you're using.
80
81    myPort = new Serial(this, Serial.list()[0], 9600);
82
83    // don't generate a serialEvent() unless you get a newline character:
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85    myPort.bufferUntil('\n');
86
87  }
88
89  void draw() {
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91    // set the background color with the color values:
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93    background(redValue, greenValue, blueValue);
94
95  }
96
97  void serialEvent(Serial myPort) {
98
99    // get the ASCII string:
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101    String inString = myPort.readStringUntil('\n');
102
103    if (inString != null) {
104
105      // trim off any whitespace:
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107      inString = trim(inString);
108
109      // split the string on the commas and convert the resulting substrings
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111      // into an integer array:
112
113      float[] colors = float(split(inString, ","));
114
115      // if the array has at least three elements, you know you got the whole
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117      // thing.  Put the numbers in the color variables:
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119      if (colors.length >= 3) {
120
121        // map them to the range 0-255:
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123        redValue = map(colors[0], 0, 1023, 0, 255);
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125        greenValue = map(colors[1], 0, 1023, 0, 255);
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127        blueValue = map(colors[2], 0, 1023, 0, 255);
128
129      }
130
131    }
132
133  }
134
135*/
136
137/* Max/MSP patch for this example
138
139 ----------begin_max5_patcher----------
140
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208
209-----------end_max5_patcher-----------
210
211*/