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Trond Lossius, 06/29/2010 04:07 pm

Interpolation Extension

Any parameter change in a scene description can either be discrete (jump to) or continuous/interpolated (smooth)

Interpolation flag

Interpolating on a parameter of an entity (source/sink/speaker)

/spatdif/interpolate/source/1/position 1

/spatdif/interpolate/source/*/position 0

Setting a target time (duration) or imply interpolation to the next occurrence of the parameter

/spatdif/interpolate/source/1/time 2.5

/spatdif/interpolate/source/1/time -1

Interpolation type

For each interpolation type the formula for increasing a normalized one-dimensional value {{latex($y_n$)}} from 0 to 1 over the normalized time interval {{latex($t_n$)}} starting at 0 and ending at 1.


/spatdif/interpolate/source/1/type linear

{{latex($y_n = t_n$)}}


/spatdif/interpolate/source/1/type cubic


/spatdif/interpolate/source/1/type quadratic


/spatdif/interpolate/source/1/type cosine

{{latex($y_n = 0.5 - 0.5 * cos(\pi * t_n$\))}}

Q: tweening/easing?

InterpolationPosition.mov - Different interpolation results (polar vs. cart. coordinates) (126 KB) Nils Peters, 07/03/2010 12:27 am