Is it possible to blur objects in Gem? either feather the edges, or create a 'trail' left behind by moving shapes? preferable controllably

if someone can help, or direct me to a plug in etc that would be cool

Thanks
James.

Note: I don't use Gem, but...

Trails mean delays, and there are two ways of doing this. You could feedback the generated images [1] or you could store previous control data [2]. Compare IIR and FIR filter techniques.

[1] Capture the screen output to a texture (not sure how, but it is possible I think), and display this on a square behind all your objects, so previous images appear on the background. Adjust the transparency of the background to adjust the length of trails.

[2] You could use [repeat] (from Zexy library) to clone objects, you would store previous positions of your object, move the cloned objects to the previous positions and change the properties of the objects (eg, making them more transparent as you move further from the current position).

[1] would be quite simple and act on all objects, and have minimal control.

[2] would require more patching, but would be much more controllable - potentially you could have trails that behave in really strange ways, one simple way would be to have spheres that get bigger and more transparent, like ripples spreading out from a duck on a pond (except in 3D,,,).

for an even more hectic effect with no control at all you can turn the buffering to 0 on the gemwin object. Then pass a metro to gemhead to control frame rate. This will make it so the screen never clears, unles you bang gemwin.

not big, not clever, but hey its a nice old school effect

a blur can be described by a convolution i would have thought. [pix_convolve] will do it maybe.

Pushing the boundaries of necrobumping a thread (19 years!)...

I just needed a more extreme blur than pix_convolve can do.

For future readers: pix_frei0r with the stock IIRblur plugin worked great, a trouble-free drop-in.

hjh

there is a motion blur thing in the objects . i havnt used it before.

Right -- the OP actually mentions both types of blurring: blurring the contents of each frame individually (feathering edges), or blurring from one frame to the next (trails).

[pix_blur] does motion blurring but AFAICS it does not do image blurring.

[pix_convolve] does image blurring, but it's probably slow for the large kernels that would be required for extreme blurring effects.

I needed an extreme image blur (soft-edge alpha masking) so I looked to see if frei0r had an appropriate plugin, and it did

AFAICS Gem does not have a built-in IIR image blur object.

hjh