1 | var Board = require("./board");
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2 | var Emitter = require("events").EventEmitter;
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3 | var util = require("util");
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4 | var Fn = require("./fn");
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5 | var int16 = Fn.int16;
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6 | var TAU = Fn.TAU;
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7 |
|
8 | var priv = new Map();
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9 |
|
10 | var Controllers = {
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11 |
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12 | HMC5883L: {
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13 | REGISTER: {
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14 | value: {
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15 |
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16 |
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17 |
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18 |
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19 | CRA: 0x00,
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20 |
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21 |
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22 | CRB: 0x01,
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23 |
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24 | MODE: 0x02,
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25 |
|
26 | READ: 0x03,
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27 | }
|
28 | },
|
29 | initialize: {
|
30 | value: function(opts, dataHandler) {
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31 | var state = priv.get(this);
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32 | var address = opts.address || 0x1E;
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33 | var READLENGTH = 6;
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34 |
|
35 | state.scale = 1;
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36 |
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37 | Object.assign(state, new Compass.Scale(opts.gauss || 0.88));
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38 |
|
39 | opts.address = address;
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40 |
|
41 | this.io.i2cConfig(opts);
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42 |
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43 |
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44 |
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45 |
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46 |
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47 |
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48 |
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49 |
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50 | this.io.i2cWrite(address, this.REGISTER.CRA, 0x70);
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51 |
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52 |
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53 |
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54 | this.io.i2cWrite(address, this.REGISTER.CRB, 0x40);
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55 |
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56 |
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57 |
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58 | this.io.i2cWrite(address, this.REGISTER.MODE, 0x00);
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59 |
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60 | this.io.i2cRead(address, this.REGISTER.READ, READLENGTH, function(bytes) {
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61 | dataHandler({
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62 | x: int16(bytes[0], bytes[1]),
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63 | y: int16(bytes[4], bytes[5]),
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64 | z: int16(bytes[2], bytes[3]),
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65 | });
|
66 | });
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67 | }
|
68 | },
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69 | toScaledHeading: {
|
70 | value: function(raw) {
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71 | var state = priv.get(this);
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72 |
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73 | return ToHeading(raw.x * state.scale, raw.y * state.scale);
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74 | }
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75 | }
|
76 | },
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77 |
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78 | |
79 |
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80 |
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81 |
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82 |
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83 |
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84 | HMC6352: {
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85 | REGISTER: {
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86 | value: {
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87 | READ: 0x41
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88 | }
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89 | },
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90 | initialize: {
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91 | value: function(opts, dataHandler) {
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92 | var state = priv.get(this);
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93 | var address = opts.address || 0x21;
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94 | var READLENGTH = 2;
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95 |
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96 | state.scale = 1;
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97 |
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98 | opts.delay = 10;
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99 | opts.address = address;
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100 |
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101 | this.io.i2cConfig(opts);
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102 |
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103 | this.io.i2cWrite(address, this.REGISTER.READ);
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104 |
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105 |
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106 | this.io.i2cRead(address, this.REGISTER.READ, READLENGTH, function(bytes) {
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107 | dataHandler({
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108 | x: (((bytes[0] << 8) + bytes[1]) / 10) | 0,
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109 | y: null,
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110 | z: null,
|
111 | });
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112 | });
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113 | }
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114 | },
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115 | toScaledHeading: {
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116 | value: function(raw) {
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117 | var state = priv.get(this);
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118 | return raw.x * state.scale;
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119 | },
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120 | },
|
121 | },
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122 |
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123 | BNO055: {
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124 | initialize: {
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125 | value: function(opts, dataHandler) {
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126 | var IMU = require("./imu");
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127 | var driver = IMU.Drivers.get(this.board, "BNO055", opts);
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128 | var state = priv.get(this);
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129 |
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130 |
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131 | state.sensitivity = 16;
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132 |
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133 | driver.on("data", function(data) {
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134 | dataHandler(data.magnetometer);
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135 | });
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136 | }
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137 | },
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138 | toScaledHeading: {
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139 | value: function(raw) {
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140 | var state = priv.get(this);
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141 |
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142 | var x = raw.x / state.sensitivity;
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143 | var y = raw.y / state.sensitivity;
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144 |
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145 | return ToHeading(x, y);
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146 | },
|
147 | },
|
148 | },
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149 |
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150 |
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151 | MAG3110: {
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152 | REGISTER: {
|
153 | value: {
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154 |
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155 |
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156 |
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157 | STATUS: 0x00,
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158 |
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159 | READ: 0x01,
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160 |
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161 | OFFSETS: 0x09,
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162 |
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163 | CTRL_REG1: 0x10,
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164 |
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165 | CTRL_REG2: 0x11,
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166 | }
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167 | },
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168 | initialize: {
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169 | value: function(opts, dataHandler) {
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170 | var state = priv.get(this);
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171 |
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172 |
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173 | var address = 0x0E;
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174 | var isDataPending = false;
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175 | var temp;
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176 |
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177 | state.isCalibrated = false;
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178 | state.isPreCalibrated = false;
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179 | state.hasEmittedCalibration = false;
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180 | state.measurements = 20;
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181 |
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182 | state.offsets = {
|
183 | x: 0,
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184 | y: 0,
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185 | z: 0,
|
186 | };
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187 | state.accum = {
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188 | x: { offset: null, high: 0, low: 0 },
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189 | y: { offset: null, high: 0, low: 0 },
|
190 | z: { offset: null, high: 0, low: 0 },
|
191 | };
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192 | opts.delay = 2;
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193 | opts.address = address;
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194 |
|
195 | if (opts.offsets) {
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196 | state.isCalibrated = true;
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197 | state.isPreCalibrated = true;
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198 |
|
199 | if (Array.isArray(opts.offsets)) {
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200 | temp = opts.offsets.slice();
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201 | opts.offsets = {
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202 | x: temp[0],
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203 | y: temp[1],
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204 | z: temp[2],
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205 | };
|
206 | }
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207 |
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208 | state.accum.x.low = opts.offsets.x[0];
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209 | state.accum.x.high = opts.offsets.x[1];
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210 | state.accum.x.offset = (state.accum.x.low + state.accum.x.high) / 2;
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211 |
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212 | state.accum.y.low = opts.offsets.y[0];
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213 | state.accum.y.high = opts.offsets.y[1];
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214 | state.accum.y.offset = (state.accum.y.low + state.accum.y.high) / 2;
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215 |
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216 | state.accum.z.low = opts.offsets.z[0];
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217 | state.accum.z.high = opts.offsets.z[1];
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218 | state.accum.z.offset = (state.accum.z.low + state.accum.z.high) / 2;
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219 | }
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220 |
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221 | |
222 |
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223 |
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224 |
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225 |
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226 |
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227 |
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228 |
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229 |
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230 |
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231 |
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232 |
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233 |
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234 |
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235 | this.io.i2cConfig(opts);
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236 | |
237 |
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238 |
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239 |
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240 |
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241 |
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242 |
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243 |
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244 |
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245 |
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246 |
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247 |
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248 |
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249 |
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250 |
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251 |
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252 |
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253 |
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254 |
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255 |
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256 |
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257 |
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258 |
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259 | this.io.i2cWrite(address, this.REGISTER.CTRL_REG2, 0x80);
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260 |
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261 |
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262 | |
263 |
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264 |
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265 |
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266 |
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267 |
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268 |
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269 |
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270 |
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271 |
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272 |
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273 |
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274 |
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275 |
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276 |
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277 |
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278 |
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279 |
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280 | this.io.i2cWrite(address, this.REGISTER.CTRL_REG1, 0x01);
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281 |
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282 | var measured = {
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283 | x: 0,
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284 | y: 0,
|
285 | z: 0,
|
286 | };
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287 |
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288 | var readCycle = function() {
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289 | this.io.i2cReadOnce(address, this.REGISTER.STATUS, 1, function(data) {
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290 | |
291 |
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292 |
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293 |
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294 |
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295 |
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296 |
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297 |
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298 |
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299 |
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300 |
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301 |
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302 |
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303 |
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304 |
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305 |
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306 |
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307 |
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308 |
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309 |
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310 |
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311 |
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312 |
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313 |
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314 |
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315 |
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316 |
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317 |
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318 |
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319 |
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320 |
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321 |
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322 |
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323 |
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324 |
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325 |
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326 |
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327 |
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328 | if (!isDataPending && (data[0] === 0x0F || data[0] === 0xFF)) {
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329 | isDataPending = true;
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330 |
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331 | this.io.i2cReadOnce(address, this.REGISTER.READ, 6, function(bytes) {
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332 | var timeout = 0;
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333 |
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334 | isDataPending = false;
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335 |
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336 | measured.x = int16(bytes[0], bytes[1]);
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337 | measured.y = int16(bytes[2], bytes[3]);
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338 | measured.z = int16(bytes[4], bytes[5]);
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339 |
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340 | if (!state.isCalibrated) {
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341 |
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342 | if (state.accum.x.offset === null) {
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343 | state.accum.x.offset = measured.x;
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344 | state.accum.x.low = measured.x;
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345 | state.accum.x.high = measured.x;
|
346 | }
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347 |
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348 | if (state.accum.y.offset === null) {
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349 | state.accum.y.offset = measured.y;
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350 | state.accum.y.low = measured.y;
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351 | state.accum.y.high = measured.y;
|
352 | }
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353 |
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354 | state.accum.x.low = Math.min(state.accum.x.low, measured.x);
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355 | state.accum.x.high = Math.max(state.accum.x.high, measured.x);
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356 | state.accum.x.offset = Math.trunc((state.accum.x.low + state.accum.x.high) / 2);
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357 |
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358 | state.accum.y.low = Math.min(state.accum.y.low, measured.y);
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359 | state.accum.y.high = Math.max(state.accum.y.high, measured.y);
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360 | state.accum.y.offset = Math.trunc((state.accum.y.low + state.accum.y.high) / 2);
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361 |
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362 | state.accum.z.low = Math.min(state.accum.z.low, measured.z);
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363 | state.accum.z.high = Math.max(state.accum.z.high, measured.z);
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364 | state.accum.z.offset = Math.trunc((state.accum.z.low + state.accum.z.high) / 2);
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365 |
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366 | --state.measurements;
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367 |
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368 | if (!state.measurements) {
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369 | state.isCalibrated = true;
|
370 | }
|
371 | }
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372 |
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373 | if (state.isCalibrated) {
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374 | if (!state.hasEmittedCalibration) {
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375 | state.hasEmittedCalibration = true;
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376 |
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377 | state.offsets.x = state.accum.x.offset;
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378 | state.offsets.y = state.accum.y.offset;
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379 | state.offsets.z = state.accum.z.offset;
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380 |
|
381 | this.io.i2cWrite(address, this.REGISTER.OFFSETS, [
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382 | state.offsets.x >> 7, (state.offsets.x << 1) & 0xFF,
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383 | state.offsets.y >> 7, (state.offsets.y << 1) & 0xFF,
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384 | state.offsets.z >> 7, (state.offsets.z << 1) & 0xFF,
|
385 | ]);
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386 |
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387 | this.emit("calibrated", {
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388 | x: [state.accum.x.low, state.accum.x.high],
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389 | y: [state.accum.y.low, state.accum.y.high],
|
390 | z: [state.accum.z.low, state.accum.z.high],
|
391 | });
|
392 | }
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393 |
|
394 | timeout = Math.floor(1000 / 80);
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395 |
|
396 | dataHandler(measured);
|
397 | }
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398 |
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399 |
|
400 | setTimeout(readCycle, timeout);
|
401 | }.bind(this));
|
402 | } else {
|
403 | readCycle();
|
404 | }
|
405 | }.bind(this));
|
406 | }.bind(this);
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407 |
|
408 | readCycle();
|
409 | }
|
410 | },
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411 | calibrate: {
|
412 | value: function(measurements) {
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413 | var state = priv.get(this);
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414 |
|
415 | state.isCalibrated = false;
|
416 | state.measurements = measurements;
|
417 | }
|
418 | },
|
419 | toScaledHeading: {
|
420 | value: function(raw) {
|
421 | var state = priv.get(this);
|
422 | var scale = {
|
423 | x: 1 / (state.accum.x.high - state.accum.x.low),
|
424 | y: 1 / (state.accum.y.high - state.accum.y.low),
|
425 | };
|
426 |
|
427 | var heading = Math.atan2(-raw.y * scale.y, raw.x * scale.x);
|
428 |
|
429 | if (heading < 0) {
|
430 | heading += TAU;
|
431 | }
|
432 |
|
433 | return Math.trunc(heading * Fn.RAD_TO_DEG);
|
434 | },
|
435 | },
|
436 | },
|
437 |
|
438 | |
439 |
|
440 |
|
441 |
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442 |
|
443 |
|
444 | LSM303C: {
|
445 | initialize: {
|
446 | value: function(opts, dataHandler) {
|
447 | var IMU = require("./imu");
|
448 | var driver = IMU.Drivers.get(this.board, "LSM303C", opts);
|
449 |
|
450 | driver.on("data", function(data) {
|
451 | dataHandler(data.magnetometer);
|
452 | });
|
453 | }
|
454 | },
|
455 | toScaledHeading: {
|
456 | value: function(raw) {
|
457 | return ToHeading(raw.x, raw.y);
|
458 | },
|
459 | },
|
460 | },
|
461 | };
|
462 |
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463 |
|
464 |
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465 |
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466 |
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467 |
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468 |
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469 |
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470 |
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471 |
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472 |
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473 |
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474 |
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475 |
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476 |
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477 |
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478 |
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479 |
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480 |
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481 |
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482 |
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483 |
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484 |
|
485 | function Compass(opts) {
|
486 |
|
487 | if (!(this instanceof Compass)) {
|
488 | return new Compass(opts);
|
489 | }
|
490 |
|
491 | Board.Component.call(
|
492 | this, opts = Board.Options(opts)
|
493 | );
|
494 |
|
495 | var freq = opts.freq || 25;
|
496 | var controller = null;
|
497 | var raw = {
|
498 | x: null,
|
499 | y: null,
|
500 | z: null,
|
501 | };
|
502 | var state = {
|
503 | x: 0,
|
504 | y: 0,
|
505 | z: 0,
|
506 | scale: 0,
|
507 | register: 0,
|
508 | heading: 0
|
509 | };
|
510 |
|
511 | if (opts.controller && typeof opts.controller === "string") {
|
512 | controller = Controllers[opts.controller.toUpperCase()];
|
513 | } else {
|
514 | controller = opts.controller;
|
515 | }
|
516 |
|
517 | if (controller == null) {
|
518 | throw new Error("Compass expects a valid controller");
|
519 | }
|
520 |
|
521 | Board.Controller.call(this, controller, opts);
|
522 |
|
523 | if (!this.toScaledHeading) {
|
524 | this.toScaledHeading = opts.toScaledHeading || function(raw) {
|
525 | return raw;
|
526 | };
|
527 | }
|
528 |
|
529 | priv.set(this, state);
|
530 |
|
531 | if (typeof this.initialize === "function") {
|
532 | this.initialize(opts, function(data) {
|
533 | raw = data;
|
534 | });
|
535 | }
|
536 |
|
537 | setInterval(function() {
|
538 | if (raw.x === null) {
|
539 | return;
|
540 | }
|
541 | var isChange = false;
|
542 |
|
543 | state.x = raw.x;
|
544 | state.y = raw.y;
|
545 | state.z = raw.z;
|
546 |
|
547 | var heading = this.heading;
|
548 |
|
549 | if (heading !== state.heading) {
|
550 | state.heading = heading;
|
551 | isChange = true;
|
552 | }
|
553 |
|
554 | this.emit("data", {
|
555 | heading: state.heading
|
556 | });
|
557 |
|
558 | if (isChange) {
|
559 | this.emit("change", {
|
560 | heading: state.heading
|
561 | });
|
562 | }
|
563 | }.bind(this), freq);
|
564 |
|
565 | Object.defineProperties(this, {
|
566 | |
567 |
|
568 |
|
569 |
|
570 |
|
571 |
|
572 |
|
573 |
|
574 |
|
575 |
|
576 |
|
577 |
|
578 |
|
579 |
|
580 |
|
581 |
|
582 | bearing: {
|
583 | get: function() {
|
584 | var length = Compass.Points.length;
|
585 | var heading = this.heading;
|
586 | var point;
|
587 |
|
588 | for (var i = 0; i < length; i++) {
|
589 | point = Compass.Points[i];
|
590 |
|
591 | if (heading >= point.low && heading <= point.high) {
|
592 |
|
593 |
|
594 | return {
|
595 | name: point.name,
|
596 | abbr: point.abbr,
|
597 | low: point.low,
|
598 | high: point.high,
|
599 | heading: heading
|
600 | };
|
601 | }
|
602 | }
|
603 | }
|
604 | },
|
605 |
|
606 | |
607 |
|
608 |
|
609 |
|
610 |
|
611 |
|
612 |
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613 |
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614 |
|
615 |
|
616 | raw: {
|
617 | get: function() {
|
618 | return {
|
619 | x: raw.x,
|
620 | y: raw.y,
|
621 | z: raw.z
|
622 | };
|
623 | }
|
624 | },
|
625 |
|
626 | |
627 |
|
628 |
|
629 |
|
630 |
|
631 |
|
632 | heading: {
|
633 | get: function() {
|
634 | return this.toScaledHeading(raw);
|
635 | }
|
636 | }
|
637 | });
|
638 | }
|
639 |
|
640 |
|
641 | util.inherits(Compass, Emitter);
|
642 |
|
643 | function ToHeading(x, y) {
|
644 | |
645 |
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646 |
|
647 |
|
648 |
|
649 |
|
650 |
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651 |
|
652 |
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653 |
|
654 |
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655 |
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656 |
|
657 | |
658 |
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659 |
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660 |
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661 |
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662 |
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663 |
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664 |
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665 |
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666 |
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667 |
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668 |
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669 |
|
670 | var radians = Math.atan2(y, x);
|
671 |
|
672 | if (radians < 0) {
|
673 | radians += TAU;
|
674 | }
|
675 |
|
676 | if (radians > TAU) {
|
677 | radians -= TAU;
|
678 | }
|
679 |
|
680 | return radians * Fn.RAD_TO_DEG;
|
681 | }
|
682 |
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683 |
|
684 |
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685 |
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686 |
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687 |
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688 |
|
689 |
|
690 |
|
691 |
|
692 |
|
693 | Compass.Scale = function(gauss) {
|
694 |
|
695 | if (gauss === 0.88) {
|
696 | this.register = 0x00;
|
697 | this.scale = 0.73;
|
698 | } else if (gauss === 1.3) {
|
699 | this.register = 0x01;
|
700 | this.scale = 0.92;
|
701 | } else if (gauss === 1.9) {
|
702 | this.register = 0x02;
|
703 | this.scale = 1.22;
|
704 | } else if (gauss === 2.5) {
|
705 | this.register = 0x03;
|
706 | this.scale = 1.52;
|
707 | } else if (gauss === 4.0) {
|
708 | this.register = 0x04;
|
709 | this.scale = 2.27;
|
710 | } else if (gauss === 4.7) {
|
711 | this.register = 0x05;
|
712 | this.scale = 2.56;
|
713 | } else if (gauss === 5.6) {
|
714 | this.register = 0x06;
|
715 | this.scale = 3.03;
|
716 | } else if (gauss === 8.1) {
|
717 | this.register = 0x07;
|
718 | this.scale = 4.35;
|
719 | } else {
|
720 | this.register = 0x00;
|
721 | this.scale = 1;
|
722 | }
|
723 |
|
724 |
|
725 | this.register = this.register << 5;
|
726 | };
|
727 |
|
728 |
|
729 |
|
730 |
|
731 |
|
732 |
|
733 |
|
734 |
|
735 |
|
736 |
|
737 | Compass.Points = [{
|
738 | name: "North",
|
739 | abbr: "N",
|
740 | low: 354.38,
|
741 | high: 360
|
742 | }, {
|
743 | name: "North",
|
744 | abbr: "N",
|
745 | low: 0,
|
746 | high: 5.62
|
747 | }, {
|
748 | name: "North by East",
|
749 | abbr: "NbE",
|
750 | low: 5.63,
|
751 | high: 16.87
|
752 | }, {
|
753 | name: "North-NorthEast",
|
754 | abbr: "NNE",
|
755 | low: 16.88,
|
756 | high: 28.12
|
757 | }, {
|
758 | name: "NorthEast by North",
|
759 | abbr: "NEbN",
|
760 | low: 28.13,
|
761 | high: 39.37
|
762 | }, {
|
763 | name: "NorthEast",
|
764 | abbr: "NE",
|
765 | low: 39.38,
|
766 | high: 50.62
|
767 | }, {
|
768 | name: "NorthEast by East",
|
769 | abbr: "NEbE",
|
770 | low: 50.63,
|
771 | high: 61.87
|
772 | }, {
|
773 | name: "East-NorthEast",
|
774 | abbr: "ENE",
|
775 | low: 61.88,
|
776 | high: 73.12
|
777 | }, {
|
778 | name: "East by North",
|
779 | abbr: "EbN",
|
780 | low: 73.13,
|
781 | high: 84.37
|
782 | }, {
|
783 | name: "East",
|
784 | abbr: "E",
|
785 | low: 84.38,
|
786 | high: 95.62
|
787 | }, {
|
788 | name: "East by South",
|
789 | abbr: "EbS",
|
790 | low: 95.63,
|
791 | high: 106.87
|
792 | }, {
|
793 | name: "East-SouthEast",
|
794 | abbr: "ESE",
|
795 | low: 106.88,
|
796 | high: 118.12
|
797 | }, {
|
798 | name: "SouthEast by East",
|
799 | abbr: "SEbE",
|
800 | low: 118.13,
|
801 | high: 129.37
|
802 | }, {
|
803 | name: "SouthEast",
|
804 | abbr: "SE",
|
805 | low: 129.38,
|
806 | high: 140.62
|
807 | }, {
|
808 | name: "SouthEast by South",
|
809 | abbr: "SEbS",
|
810 | low: 140.63,
|
811 | high: 151.87
|
812 | }, {
|
813 | name: "South-SouthEast",
|
814 | abbr: "SSE",
|
815 | low: 151.88,
|
816 | high: 163.12
|
817 | }, {
|
818 | name: "South by East",
|
819 | abbr: "SbE",
|
820 | low: 163.13,
|
821 | high: 174.37
|
822 | }, {
|
823 | name: "South",
|
824 | abbr: "S",
|
825 | low: 174.38,
|
826 | high: 185.62
|
827 | }, {
|
828 | name: "South by West",
|
829 | abbr: "SbW",
|
830 | low: 185.63,
|
831 | high: 196.87
|
832 | }, {
|
833 | name: "South-SouthWest",
|
834 | abbr: "SSW",
|
835 | low: 196.88,
|
836 | high: 208.12
|
837 | }, {
|
838 | name: "SouthWest by South",
|
839 | abbr: "SWbS",
|
840 | low: 208.13,
|
841 | high: 219.37
|
842 | }, {
|
843 | name: "SouthWest",
|
844 | abbr: "SW",
|
845 | low: 219.38,
|
846 | high: 230.62
|
847 | }, {
|
848 | name: "SouthWest by West",
|
849 | abbr: "SWbW",
|
850 | low: 230.63,
|
851 | high: 241.87
|
852 | }, {
|
853 | name: "West-SouthWest",
|
854 | abbr: "WSW",
|
855 | low: 241.88,
|
856 | high: 253.12
|
857 | }, {
|
858 | name: "West by South",
|
859 | abbr: "WbS",
|
860 | low: 253.13,
|
861 | high: 264.37
|
862 | }, {
|
863 | name: "West",
|
864 | abbr: "W",
|
865 | low: 264.38,
|
866 | high: 275.62
|
867 | }, {
|
868 | name: "West by North",
|
869 | abbr: "WbN",
|
870 | low: 275.63,
|
871 | high: 286.87
|
872 | }, {
|
873 | name: "West-NorthWest",
|
874 | abbr: "WNW",
|
875 | low: 286.88,
|
876 | high: 298.12
|
877 | }, {
|
878 | name: "NorthWest by West",
|
879 | abbr: "NWbW",
|
880 | low: 298.13,
|
881 | high: 309.37
|
882 | }, {
|
883 | name: "NorthWest",
|
884 | abbr: "NW",
|
885 | low: 309.38,
|
886 | high: 320.62
|
887 | }, {
|
888 | name: "NorthWest by North",
|
889 | abbr: "NWbN",
|
890 | low: 320.63,
|
891 | high: 331.87
|
892 | }, {
|
893 | name: "North-NorthWest",
|
894 | abbr: "NNW",
|
895 | low: 331.88,
|
896 | high: 343.12
|
897 | }, {
|
898 | name: "North by West",
|
899 | abbr: "NbW",
|
900 | low: 343.13,
|
901 | high: 354.37
|
902 | }];
|
903 |
|
904 | Object.freeze(Compass.Points);
|
905 |
|
906 |
|
907 |
|
908 |
|
909 |
|
910 |
|
911 |
|
912 |
|
913 |
|
914 |
|
915 |
|
916 |
|
917 |
|
918 |
|
919 |
|
920 |
|
921 |
|
922 |
|
923 |
|
924 |
|
925 | if (!!process.env.IS_TEST_MODE) {
|
926 | Compass.Controllers = Controllers;
|
927 | Compass.purge = function() {
|
928 | priv.clear();
|
929 | };
|
930 | }
|
931 |
|
932 | module.exports = Compass;
|