Node.js + Raspberry pi + 25 RGB Leds

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Socoder -> Web Development -> Node.js + Raspberry pi + 25 RGB Leds
Wed, 13 Jan 2016, 02:54
waroffice	morning, it has been a long time since I ventured in to this type of coding and have hit a brick wall. Posting in here because JS is I guess a web technology. I have a raspberry pi controlling 25 individually addressable RGB LEDs, works a treat. I just can't animate for toffee! I would like the lights to scroll a sort of colour hue table but I suck and cannot figure it out. this is what I have so far, it just changes colour once every 0.5 seconds, I have snipped a bit to make it easier to read. The socket.io stuff just receives a message from the web interface and starts the interval timer which calls the function after updating a "frame" number, it sucks. I need help in animations of this kind. function stepscroll(frame){ for (i = 0; i < no_leds-1; i++){ tmp = float2int(255/counter)+frame; lights[i] = {}; lights[i]["r"] = 255 - tmp; lights[i]["g"] = tmp; lights[i]["b"] = 255 - tmp; } for (i=0; i < no_leds-1; i++){ leds.setColor(i, [lights[i]["r"],lights[i]["g"],lights[i]["b"]]); } leds.update(); // console.log('Frame= ' + frame + 'Counter=' + counter + ' LED[1]=' + lights[1]["r"] + ':' + lights[1]["g"] + ':' + lights[1]["b"]); socket.on('start1', function (data) { timer = setInterval(function() { if (cur_frame < 250){ cur_frame++; }else{ cur_frame=0; } stepscroll(cur_frame); }, 500); }); } socket.on('stop1', function (data) { console.log('Stopping animation'); clearInterval(timer); }); --v
Wed, 13 Jan 2016, 03:20
Jayenkai	Not sure exactly what your issue is, but here's a nice colour bar! Hope it helps (BlitzMax) Graphics 800,32,0 tick=0 Repeat Cls tick=tick+1 For n=0 To 80 ang=tick+(n4) r=120+(Sin(ang)120) g=120+(Sin(ang+120)120) b=120+(Sin(ang+240)120) SetColor r,g,b DrawRect(n*10,0,10,32) Next Flip Until KeyDown(KEY_ESCAPE) Or MouseDown(1) --v -=-=- ''Load, Next List!''
Wed, 13 Jan 2016, 03:47
waroffice	my issue is the maths to get a nice sine wave gradient and you seem to have given that I need to translate to js and try it later, forgot to turn on my pi when I left for work.
Wed, 13 Jan 2016, 07:31
waroffice	for reference: github.com/doghousedean/raspberry-pi-lighting
Wed, 13 Jan 2016, 08:50
waroffice	I adjusted it a little Jay to not do the *4 and it works a treat, will video it and upload it later
Wed, 13 Jan 2016, 10:04
Jayenkai	Kewly And the *4 was mostly so's the whole 360 degrees fitted in the window -=-=- ''Load, Next List!''
Thu, 14 Jan 2016, 09:42
waroffice	I tinkered with the timings etc after this vid. https://youtu.be/uM1luZU9eAE
Thu, 14 Jan 2016, 10:10
Jayenkai	That's SO cool
Thu, 14 Jan 2016, 11:11
waroffice	#sarcasm
Thu, 14 Jan 2016, 11:20
Dabz	Waroffice be like:- Dabz -=-=- Intel Core i5 6400 2.7GHz, NVIDIA GeForce GTX 1070 (8GB), 8Gig DDR4 RAM, 256GB SSD, 1TB HDD, Windows 10 64bit
Thu, 14 Jan 2016, 11:36
Jayenkai	No sarcasm here, you've made a colour changing, computer controlled light array!! Win!!! -=-=- ''Load, Next List!''