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3ffd6241 MES |
1 | import processing.net.*; |
2 | ||
3 | // Server for Open Pixel Control patterns (http://openpixelcontrol.org/) | |
4 | class OpenPixelControl extends SCPattern { | |
5 | ||
6 | int port = 7890; | |
7 | ||
8 | Server server; | |
9 | byte[] buffer; | |
10 | int bufferedByteCount; | |
11 | ||
12 | public OpenPixelControl(LX lx, PApplet parent) { | |
13 | super(lx); | |
14 | server = new Server(parent, port); | |
15 | println("Listening for Open Pixel Control data on port " + port); | |
16 | ||
17 | // Buffer space for two frames, worst case | |
18 | buffer = new byte[0x10004 * 2]; | |
19 | bufferedByteCount = 0; | |
20 | ||
21 | // Save a JSON layout file that some Open Pixel Control clients can use | |
22 | writeMappingFile("openpixelcontrol-layout.json"); | |
23 | } | |
24 | ||
25 | public void run(double deltaMs) { | |
26 | readFromClient(); | |
27 | } | |
28 | ||
29 | void readFromClient() { | |
30 | Client client = server.available(); | |
31 | ||
32 | if (client == null) { | |
33 | // No client; flush any stored partial frames | |
34 | bufferedByteCount = 0; | |
35 | return; | |
36 | } | |
37 | ||
38 | while (true) { | |
39 | int available = client.available(); | |
40 | if (available <= 0) { | |
41 | return; | |
42 | } | |
43 | ||
44 | if (bufferedByteCount == 0) { | |
45 | // Read directly to buffer | |
46 | bufferedByteCount = client.readBytes(buffer); | |
47 | } else { | |
48 | // Append to an earlier partial frame | |
b6c34457 MES |
49 | byte[] additional = new byte[buffer.length - bufferedByteCount]; |
50 | int additionalLength = client.readBytes(additional); | |
51 | arrayCopy(additional, 0, buffer, bufferedByteCount, additionalLength); | |
52 | bufferedByteCount += additionalLength; | |
3ffd6241 MES |
53 | } |
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 | } | |
77 | } | |
78 | ||
79 | void opcPacket(int channel, int command, int offset, int length) { | |
80 | // Only look at "Set Pixel Colors" to channel 0. | |
81 | if (channel == 0 && command == 0) { | |
82 | ||
83 | // Unpack colors directly into framebuffer | |
84 | for (int i = 0; i < length / 3; i++) { | |
85 | if (i >= colors.length) { | |
86 | break; | |
87 | } | |
88 | ||
89 | colors[i] = | |
90 | ((buffer[offset + 0] & 0xFF) << 16) | | |
91 | ((buffer[offset + 1] & 0xFF) << 8) | | |
92 | (buffer[offset + 2] & 0xFF) ; | |
93 | ||
94 | offset += 3; | |
95 | } | |
96 | } | |
97 | } | |
98 | ||
99 | void writeMappingFile(String filename) { | |
100 | PrintWriter output; | |
101 | output = createWriter(filename); | |
102 | ||
103 | // Rearrange points by color buffer index | |
104 | LXPoint[] orderedPoints; | |
105 | int maxIndex = 0; | |
106 | for (LXPoint p : model.points) { | |
107 | maxIndex = max(maxIndex, p.index); | |
108 | } | |
109 | orderedPoints = new LXPoint[maxIndex + 1]; | |
110 | for (LXPoint p : model.points) { | |
111 | orderedPoints[p.index] = p; | |
112 | } | |
113 | ||
114 | float xCenter = (model.xMax + model.xMin) / 2.0; | |
115 | float yCenter = (model.yMax + model.yMin) / 2.0; | |
116 | float zCenter = (model.zMax + model.zMin) / 2.0; | |
117 | float xSize = model.xMax - model.xMin; | |
118 | float zSize = model.zMax - model.zMin; | |
119 | float maxSize = max(xSize, zSize); | |
120 | float scale = 4.0 / maxSize; | |
121 | ||
122 | output.print("["); | |
123 | for (int i = 0; i < orderedPoints.length; i++) { | |
124 | boolean isLast = i == orderedPoints.length - 1; | |
125 | String comma = isLast ? "" : ","; | |
126 | LXPoint p = orderedPoints[i]; | |
127 | ||
128 | if (p == null) { | |
129 | // Unused index | |
130 | output.print("null" + comma); | |
131 | } else { | |
132 | // Transform coordinates to make sense in the OPC visualizer | |
133 | float x = (p.x - xCenter) * scale; | |
134 | float y = (p.z - zCenter) * scale; | |
135 | float z = (p.y - yCenter) * scale; | |
136 | ||
137 | output.print("{\"point\":[" + x + "," + y + "," + z + "]}" + comma); | |
138 | } | |
139 | } | |
140 | output.print("]"); | |
141 | ||
142 | output.flush(); | |
143 | output.close(); | |
144 | println("Saved OpenPixelControl model to " + filename); | |
145 | } | |
146 | }; |