[x3d-public] Proposal for New Fields for ParticleSystem

[Holger Seelig]

I would recommend to have the colorKey, texCoordKey and new scaleKey a MFFloat and to thread these values as fractions not time in the range [0,1] where 0 means start of lifetime and 1 end of lifetime, because there can be a lifetimeVariation, and maybe big. 

Otherwise it is not possible to have all particles for example at end of lifetime a color red or size 0.

Best regards,
Holger

—
Holger Seelig
holger.seelig at yahoo.de


> Am 03.11.2025 um 03:04 schrieb Don Brutzman <don.brutzman at gmail.com>:
> 
> Since the colorKey and scaleKey arrays represent time in seconds, here are some careful refinements:  
> each field should be MFTime, not MFFloat; can we change them?
> # Editors note: type MFTime instead?
> Sentences noting "monotonically increasing" have been added to each definition
> Individual time values in the colorKey array shall be monotonically increasing.
> Individual time values in the scaleKey array shall be monotonically increasing.
> Monotonic function - Wikipedia <https://en.wikipedia.org/wiki/Monotonic_function>
> all the best, Don
> -- 
> X3D Graphics, Maritime Robotics, Distributed Simulation
> Relative Motion Consulting  https://RelativeMotion.info <https://relativemotion.info/>
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