You also need to do override append() and do the same thing there, to
get the Ops to be distinct in the first place. i.e. :
void append(DD::Image::Hash& hash)
{
hash.append(outputContext().frame());
}
On Mon, 2011-10-24 at 22:19 +1030, Ben Dickson wrote:
> If I have a ModifyGeo derived plugin, is there any way to have it update
> on each frame? As a terrible example, to set random position for all
> points, for each frame
>
> The obvious thing solution is to do the following in get_geometry_hash():
>
> geo_hash[DD::Image::Group_Points].append(outputContext().frame());
>
> ..but this doesn't work, as _validate is never called, nor is anything
> further down the call-chain
>
> The only way I could find was to have a knob with an expression of
> "[frame]", which then causes _validate to be called on frame change
--
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