Add color_pulse example

example/color_pulse/app.js

@@ -0,0 +1,92 @@
+const sdk = require('cue-sdk')
+const readline = require('readline')
+const input_queue = []
+
+readline.emitKeypressEvents(process.stdin)
+process.stdin.setRawMode(true)
+process.stdin.on('keypress', (key, data) => {
+  if (data.sequence === '\u0003') {
+    // ^C
+    exit()
+  }
+  input_queue.push(key)
+})
+
+function exit(code = 0) {
+  console.log('Exiting.')
+  process.exit(code)
+}
+
+function getAvailableLeds() {
+  const leds = []
+  const deviceCount = sdk.CorsairGetDeviceCount()
+  for (let di = 0; di < deviceCount; ++di) {
+    const ledPositions = sdk.CorsairGetLedPositionsByDeviceIndex(di)
+    leds.push(ledPositions.map((p) => ({ ledId: p.ledId, r: 0, g: 0, b: 0 })))
+  }
+
+  return leds
+}
+
+function performPulseEffect(allLeds, x) {
+  const cnt = allLeds.length
+  let val = ~~((1 - (x - 1) * (x - 1)) * 255)
+  for (let di = 0; di < cnt; ++di) {
+    const device_leds = allLeds[di]
+    device_leds.forEach((led) => {
+      led.r = 0
+      led.g = val
+      led.b = 0
+    })
+
+    sdk.CorsairSetLedsColorsBufferByDeviceIndex(di, device_leds)
+  }
+  sdk.CorsairSetLedsColorsFlushBuffer()
+}
+
+function main() {
+  const details = sdk.CorsairPerformProtocolHandshake()
+  const errCode = sdk.CorsairGetLastError()
+  if (errCode !== 0) {
+    console.error(`Handshake failed: ${sdk.CorsairErrorString[errCode]}`)
+    exit(1)
+  }
+
+  const availableLeds = getAvailableLeds()
+  if (!availableLeds.length) {
+    console.error('No devices found')
+    exit(1)
+  }
+
+  console.log(
+    'Working... Use "+" or "-" to increase or decrease speed.\n' +
+      'Press "q" to close program...',
+  )
+
+  function loop(leds, waveDuration, x) {
+    const TIME_PER_FRAME = 25
+    if (input_queue.length > 0) {
+      const input = input_queue.shift()
+      if (input === 'q' || input === 'Q') {
+        exit(0)
+      } else if (input === '+') {
+        waveDuration = Math.max(100, waveDuration - 100)
+      } else if (input === '-') {
+        waveDuration = Math.min(2000, waveDuration + 100)
+      }
+    }
+
+    performPulseEffect(leds, x)
+    return setTimeout(
+      loop,
+      TIME_PER_FRAME,
+      leds,
+      waveDuration,
+      (x + TIME_PER_FRAME / waveDuration) % 2,
+    )
+  }
+
+  return loop(availableLeds, 500, 0)
+}
+
+main()

example/color_pulse/package.json

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+{
+  "name": "color_pulse",
+  "version": "1.0.0",
+  "description": "",
+  "main": "app.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "Corsair Memory, Inc.",
+  "license": "MIT",
+  "dependencies": {
+    "cue-sdk": "^1.4.1"
+  }
+}