Is there a way to combine different-colored shapes into a single curve?

[emmmi]

I was wondering if I can combine these rainbow colored rectangles into one curve.

[v_kyr]

You can geometrical add (combine) those layers into one curve (probably getting a rect then), but you would loose the different color fills then, since a curve on it's own has just one stroke/fill color. Thus you would have afterwards to use a sort of a rainbow gradient fill, or have to clip a rainbow colors bitmap to the curve. - You can try a combine and compare in contrast with a rect shape then.

Rect with linear gradient fill ...

[firstdefence]

@emmmi Why do you need one curve?

[Pšenda]

Appearance Panel or Custom Brush.

[G13RL]

To apply to a curve, you can create a brush from a rectangle to which you apply a gradient by overlaying adjacent color stops.

[John Rostron]

Are you looking for something like this:

This was done using my Polar Sector macro (within my Arcs and Arches library).

Polar Sector Macro: Polar Sector.afmacro

Arcs and Arches Library (single macro content): Arcs and Arches.afmacros

For more information see my posting here.

John