arbitrary collection of externals and abstractions originated around quaternion transformation for Pd (Pure Data)
| object | description |
|---|---|
[qacc~] |
Quaternion accumulator (quaternion multiplication and normalization of current state with incoming quaternion for each sample) |
[qmul~] |
Quaternion multiplication - right quaternion can be defined with creation args. both inputs fall back to identity quaternion if no input provided |
[qdiv~] |
Quaternion division - similar to multiplication with inverse quaternion |
[qconj~] |
Conjugate quaternion (w -x -y -z) |
[qinv~] |
Inverse quaternion (similar to conjugate divided by squared magnitude) |
[qnorm~] |
Quaternion norm (= squared magnitude) |
[qnormalize~] |
Normalize input quaternion to unit quaternion |
[qmag~] |
Magnitude of quaternion |
[qfromgyroaccel~] |
Derive quaternion from sensor input (needs more parameters and more efficient implementation) |
[qvtrans~] |
Quaternion-based vector transformation - expects 3-channel vector on left inlet and quaternion on right inlet, outputs transformed vector |
[faccwrap~] |
Float accumulator and wrapper with multichannel support - adds incoming float to current value for each sample and wraps around a defined range (default -1..1) to avoid the problem of losing precision when using vanilla's [rpole~] and [wrap~] for this kind of integration and wrapping |
[faccbounce~] |
Float accumulator with boundary bouncing with multichannel support - similar to [faccwrap~], but bounces back from defined boundaries (default -1 / 1) instead of wrapping |
[atan2~] |
Signal rate atan2 implementation |
[noisen~] |
Outputs normally distributed values (Gaussian noise) at signal rate. Can be seeded with non-zero values |
[mc_conv~] |
Applies convolution across channels of a multichannel input signal using a user-defined kernel (channel-domain, not time-domain) |
[mc_conv2d~] |
Applies convolution across channels representing a 2d square grid with input signal (also representing a square grid) |
[mc_route~] |
Routing multichannel input with another multichannel routing signal (of same or smaller channel count - in which case the routing pattern gets repeated for the other input channels) |
[urn~] |
Urn model random number generator on signal rate, triggered by impulses (or just signal 1) and seedable with signal inlet (seed applied for each cycle) |
[zc~] |
multichannel capable zerocrossing detection (outputs impulses on left outlet for upward and on right outlet for downward zero crossings) |