Commit | Line | Data |
---|---|---|
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 | |
49 | byte[] additional = client.readBytes(); | |
50 | arrayCopy(additional, 0, buffer, bufferedByteCount, additional.length); | |
51 | bufferedByteCount += additional.length; | |
52 | } | |
53 | ||
54 | // Extract OPC packets from buffer | |
55 | int offset = 0; | |
56 | while (bufferedByteCount - offset >= 4) { | |
57 | int channel = buffer[offset + 0] & 0xFF; | |
58 | int command = buffer[offset + 1] & 0xFF; | |
59 | int length = ((buffer[offset + 2] & 0xFF) << 8) | (buffer[offset + 3] & 0xFF); | |
60 | ||
61 | if (bufferedByteCount - offset < length + 4) { | |
62 | // Not enough data for a full packet yet | |
63 | break; | |
64 | } | |
65 | ||
66 | // Handle the packet in-place | |
67 | offset += 4; | |
68 | opcPacket(channel, command, offset, length); | |
69 | offset += length; | |
70 | } | |
71 | ||
72 | // If we didn't use the whole buffer, save remainder for later | |
73 | bufferedByteCount -= offset; | |
74 | arrayCopy(buffer, offset, buffer, 0, bufferedByteCount); | |
75 | } | |
76 | } | |
77 | ||
78 | void opcPacket(int channel, int command, int offset, int length) { | |
79 | // Only look at "Set Pixel Colors" to channel 0. | |
80 | if (channel == 0 && command == 0) { | |
81 | ||
82 | // Unpack colors directly into framebuffer | |
83 | for (int i = 0; i < length / 3; i++) { | |
84 | if (i >= colors.length) { | |
85 | break; | |
86 | } | |
87 | ||
88 | colors[i] = | |
89 | ((buffer[offset + 0] & 0xFF) << 16) | | |
90 | ((buffer[offset + 1] & 0xFF) << 8) | | |
91 | (buffer[offset + 2] & 0xFF) ; | |
92 | ||
93 | offset += 3; | |
94 | } | |
95 | } | |
96 | } | |
97 | ||
98 | void writeMappingFile(String filename) { | |
99 | PrintWriter output; | |
100 | output = createWriter(filename); | |
101 | ||
102 | // Rearrange points by color buffer index | |
103 | LXPoint[] orderedPoints; | |
104 | int maxIndex = 0; | |
105 | for (LXPoint p : model.points) { | |
106 | maxIndex = max(maxIndex, p.index); | |
107 | } | |
108 | orderedPoints = new LXPoint[maxIndex + 1]; | |
109 | for (LXPoint p : model.points) { | |
110 | orderedPoints[p.index] = p; | |
111 | } | |
112 | ||
113 | float xCenter = (model.xMax + model.xMin) / 2.0; | |
114 | float yCenter = (model.yMax + model.yMin) / 2.0; | |
115 | float zCenter = (model.zMax + model.zMin) / 2.0; | |
116 | float xSize = model.xMax - model.xMin; | |
117 | float zSize = model.zMax - model.zMin; | |
118 | float maxSize = max(xSize, zSize); | |
119 | float scale = 4.0 / maxSize; | |
120 | ||
121 | output.print("["); | |
122 | for (int i = 0; i < orderedPoints.length; i++) { | |
123 | boolean isLast = i == orderedPoints.length - 1; | |
124 | String comma = isLast ? "" : ","; | |
125 | LXPoint p = orderedPoints[i]; | |
126 | ||
127 | if (p == null) { | |
128 | // Unused index | |
129 | output.print("null" + comma); | |
130 | } else { | |
131 | // Transform coordinates to make sense in the OPC visualizer | |
132 | float x = (p.x - xCenter) * scale; | |
133 | float y = (p.z - zCenter) * scale; | |
134 | float z = (p.y - yCenter) * scale; | |
135 | ||
136 | output.print("{\"point\":[" + x + "," + y + "," + z + "]}" + comma); | |
137 | } | |
138 | } | |
139 | output.print("]"); | |
140 | ||
141 | output.flush(); | |
142 | output.close(); | |
143 | println("Saved OpenPixelControl model to " + filename); | |
144 | } | |
145 | }; |