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1 | |
2 | import java.io.*; | |
3 | import java.net.*; | |
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4 | |
5 | // Server for Open Pixel Control patterns (http://openpixelcontrol.org/) | |
3dcfa14e | 6 | class OpenPixelControl extends SCPattern implements Runnable { |
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7 | |
8 | int port = 7890; | |
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9 | Thread thread; |
10 | ServerSocket server; | |
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11 | byte[] buffer; |
12 | int bufferedByteCount; | |
13 | ||
14 | public OpenPixelControl(LX lx, PApplet parent) { | |
15 | super(lx); | |
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16 | parent.registerMethod("dispose", this); |
17 | ||
18 | // Save a JSON layout file that some Open Pixel Control clients can use | |
19 | writeMappingFile("openpixelcontrol-layout.json"); | |
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20 | |
21 | // Buffer space for two frames, worst case | |
22 | buffer = new byte[0x10004 * 2]; | |
23 | bufferedByteCount = 0; | |
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24 | } |
25 | ||
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26 | public void dispose() { |
27 | thread = null; | |
28 | if (server != null) { | |
29 | try { | |
30 | server.close(); | |
31 | } catch (IOException e) { | |
32 | e.printStackTrace(); | |
33 | } | |
34 | server = null; | |
35 | } | |
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36 | } |
37 | ||
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38 | public void run() { |
39 | // Thread run function; handle OPC traffic. | |
40 | while (Thread.currentThread() == thread) { | |
41 | ||
42 | try { | |
43 | Socket cli = server.accept(); | |
44 | InputStream input = cli.getInputStream(); | |
45 | bufferedByteCount = 0; | |
46 | ||
47 | while (Thread.currentThread() == thread) { | |
48 | ||
49 | int r = input.read(buffer, bufferedByteCount, buffer.length - bufferedByteCount); | |
50 | if (r <= 0) { | |
51 | break; | |
52 | } | |
53 | bufferedByteCount += r; | |
54 | ||
55 | // Extract OPC packets from buffer | |
56 | int offset = 0; | |
57 | while (bufferedByteCount - offset >= 4) { | |
58 | int channel = buffer[offset + 0] & 0xFF; | |
59 | int command = buffer[offset + 1] & 0xFF; | |
60 | int length = ((buffer[offset + 2] & 0xFF) << 8) | (buffer[offset + 3] & 0xFF); | |
61 | ||
62 | if (bufferedByteCount - offset < length + 4) { | |
63 | // Not enough data for a full packet yet | |
64 | break; | |
65 | } | |
66 | ||
67 | // Handle the packet in-place | |
68 | offset += 4; | |
69 | opcPacket(channel, command, offset, length); | |
70 | offset += length; | |
71 | } | |
72 | ||
73 | // If we didn't use the whole buffer, save remainder for later | |
74 | bufferedByteCount -= offset; | |
75 | arrayCopy(buffer, offset, buffer, 0, bufferedByteCount); | |
76 | } | |
3ffd6241 | 77 | |
3dcfa14e | 78 | cli.close(); |
3ffd6241 | 79 | |
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80 | } catch (IOException e) { |
81 | e.printStackTrace(); | |
3ffd6241 | 82 | } |
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83 | } |
84 | } | |
3ffd6241 | 85 | |
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86 | public void run(double deltaMs) { |
87 | // SCPattern run function; nothing to do except start our thread the first time. | |
88 | ||
89 | if (server == null) { | |
90 | try { | |
91 | server = new ServerSocket(this.port); | |
92 | thread = new Thread(this); | |
93 | thread.start(); | |
94 | println("Listening for Open Pixel Control data on port " + port); | |
95 | ||
96 | } catch (IOException e) { | |
97 | e.printStackTrace(); | |
98 | thread = null; | |
3ffd6241 | 99 | } |
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100 | } |
101 | } | |
102 | ||
103 | void opcPacket(int channel, int command, int offset, int length) { | |
104 | // Only look at "Set Pixel Colors" to channel 0. | |
105 | if (channel == 0 && command == 0) { | |
106 | ||
107 | // Unpack colors directly into framebuffer | |
108 | for (int i = 0; i < length / 3; i++) { | |
109 | if (i >= colors.length) { | |
110 | break; | |
111 | } | |
112 | ||
113 | colors[i] = | |
114 | ((buffer[offset + 0] & 0xFF) << 16) | | |
115 | ((buffer[offset + 1] & 0xFF) << 8) | | |
116 | (buffer[offset + 2] & 0xFF) ; | |
117 | ||
118 | offset += 3; | |
119 | } | |
120 | } | |
121 | } | |
122 | ||
123 | void writeMappingFile(String filename) { | |
124 | PrintWriter output; | |
125 | output = createWriter(filename); | |
126 | ||
127 | // Rearrange points by color buffer index | |
128 | LXPoint[] orderedPoints; | |
129 | int maxIndex = 0; | |
130 | for (LXPoint p : model.points) { | |
131 | maxIndex = max(maxIndex, p.index); | |
132 | } | |
133 | orderedPoints = new LXPoint[maxIndex + 1]; | |
134 | for (LXPoint p : model.points) { | |
135 | orderedPoints[p.index] = p; | |
136 | } | |
137 | ||
138 | float xCenter = (model.xMax + model.xMin) / 2.0; | |
139 | float yCenter = (model.yMax + model.yMin) / 2.0; | |
140 | float zCenter = (model.zMax + model.zMin) / 2.0; | |
141 | float xSize = model.xMax - model.xMin; | |
142 | float zSize = model.zMax - model.zMin; | |
143 | float maxSize = max(xSize, zSize); | |
144 | float scale = 4.0 / maxSize; | |
145 | ||
146 | output.print("["); | |
147 | for (int i = 0; i < orderedPoints.length; i++) { | |
148 | boolean isLast = i == orderedPoints.length - 1; | |
149 | String comma = isLast ? "" : ","; | |
150 | LXPoint p = orderedPoints[i]; | |
151 | ||
152 | if (p == null) { | |
153 | // Unused index | |
154 | output.print("null" + comma); | |
155 | } else { | |
156 | // Transform coordinates to make sense in the OPC visualizer | |
157 | float x = (p.x - xCenter) * scale; | |
158 | float y = (p.z - zCenter) * scale; | |
159 | float z = (p.y - yCenter) * scale; | |
160 | ||
161 | output.print("{\"point\":[" + x + "," + y + "," + z + "]}" + comma); | |
162 | } | |
163 | } | |
164 | output.print("]"); | |
165 | ||
166 | output.flush(); | |
167 | output.close(); | |
168 | println("Saved OpenPixelControl model to " + filename); | |
169 | } | |
170 | }; |