Chase sequence?

[jschuenke1]

Is it possible to create a sequence in a loop where the addressed LED advances? I'd like to start at 0 and pulse LED up/down and then move to LED 1 and pulse up/down, etc to an end point of say 50 LED's.

I need a way to address led 1, then 2, then 3, etc. i don't see how to do this in your commands.

[jschuenke1]

OK so I see how to address particular LED's using the fill command. Is there a way to make the startLED a parameter so it can be incremented in a do loop?

[tom-2015]

not at this moment unfortunately if you don't have too much LEDs you can just copy/paste I think

[tom-2015]

you can do this now with {0} which will be replaced by loop index and extra parameter can be added to the loop = step.

do
     fill 1,FF0000,{0},1
loop 10,2

this is the same as:

for (i=0;i<10;i+=2){
     fill 1,FF0000,i,1
}

if you have a nested loops you can increase the {0} to {1}:

do
    do
          fill 1,FF0000,{1},1
    loop 10,2
loop

To create complicated animations it's better to run the ws2812svr as a system service listening on a TCP port and send commands to it with external program like python,C# or shell script.

Create png files with each pixel the color for the led you want and load them with the readpng command in a loop is another possibility. The newest version can read entire png/jpg files with a delay between rendering each pixel line.

[jschuenke1]

Thanks! I will give it a try.

Jeff Schuenke Senior Director of Software Development

M: 415 601 0860<tel:(415)%20601-0860> | @: jschuenke@viscira.com Viscira, LLC | 909 Battery Street | San Francisco, CA 94111https://maps.google.com/?q=901+Battery+Street+%7C+San+Francisco,+CA+94111&entry=gmail&source=g

From: Tom notifications@github.com Reply-To: tom-2015/rpi-ws2812-server reply@reply.github.com Date: Thursday, December 26, 2019 at 6:54 AM To: tom-2015/rpi-ws2812-server rpi-ws2812-server@noreply.github.com Cc: Jeff Schuenke JSchuenke@viscira.com, Author author@noreply.github.com Subject: Re: [tom-2015/rpi-ws2812-server] Chase sequence? (#31)

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you can do this now with {0} which will be replaced by loop index and extra parameter can be added to the loop = step.

do

 fill 1,FF0000,{0},1

loop 10,2

this is the same as:

for (i=0;i<10;i+=2){

 fill 1,FF0000,i,1

}

if you have a nested loops you can increase the {0} to {1}:

do

do

      fill 1,FF0000,{1},1

loop 10,2

loop

To create complicated animations it's better to run the ws2812svr as a system service listening on a TCP port and send commands to it with external program like python,C# or shell script.

Create png files with each pixel the color for the led you want and load them with the readpng command in a loop is another possibility. The newest version can read entire png/jpg files with a delay between rendering each pixel line.

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