Dear Puredata folks,
I have a new external that does HSI (hue, saturation, intensity) to RGB conversion. There is already an existing HSV2RGB function, but HSI is a more sensible color space for LED lighting (which is what I use my external for).
I don't want to get involved in the PureData development community really, given the numerous current demands on my time. However, I think that others may want this external so I was wondering if there is a simple way to upload it. As is, you just run the makefile using gcc on either a mac or linux to produce the external.
I don't know how to use windows, but I imagine someone could figure out how to modify the makefile to target the platform if they wanted.
I also included a usage patch showing how I use it to control LED lighting over OSC through a MIDI controller. Sorry if it's a bit messy, I grew up on Max/MSP where we just wire everything and then hide them. I didn't realize that hiding in PD is done with some kind of window and so I didn't do things like send and receive. Should work though.
I'd also be curious if anyone knows of a datarate limiting object for messages. Right now, I'm using buddy along with a metronome to accomplish the task (pretty straightforward), but it seems like a task that other people might be interested in -- for instance in cases where events are overwhelming the CPU and there is a desire to limit the rate of messages when the CPU is being overutilized. In my patch, I use it to limit the maximum datarate physically being sent out over UDP to my wifi lights because too high of datarates result in lags at the 802.11b level.
The other object that I found was strangely missing was the ability to do powers or logarithms inside of an expr. Probably been brought up before, but I wanted to do logarithmic scaling of a dial output to control the speed of hue rotation of lighting. I ended up doing it with an any mode sync, pow, and an expr on the exponent but it was messy and perhaps tricky for someone with less experience to figure out how to do.
Best, Brian Neltner