On Mon, 2015-12-28 at 23:41 +0100, ivan louette wrote:

Interesting ! However which kind of blend does it mean ? Additive, substractive or any other kind of blend like in filter effects ?

Good question, it seems it means moving from one colour to another with regular steps.

Martin,

Blending is simulating a process. Mixing paints on a physical palette. So the blend mode should mirror this effect. It's the way people who mix paints are used to mixing to get a given color. - Subtractive mixing is the primary way people are used to. I.e. yellow and blue, where they join, gives green. - But Additive mixing as an option to toggle on the blend portion is useful to play with whites (Subtractive tends to black)

On 12/29/2015 3:49 PM, Yuxiang Wang wrote:

Cool idea! I was thinking that it means linear interpolation of Cartesian coordinates in the RGB space.

Shawn

On Mon, Dec 28, 2015 at 7:18 PM, Martin Owens <doctormo@...400...> wrote:

...

On Mon, 2015-12-28 at 23:41 +0100, ivan louette wrote:

...

Interesting ! However which kind of blend does it mean ? Additive, substractive or any other kind of blend like in filter effects ?

When I need to mix from one colour to another, I use the gradient tool.

1. Make a shape 2. Add gradient fill 3. Modify gradient ends to be desired start and end colours 4. Set shape aside to use as colour palate: hold ctrl/cmd while using the eyedropper tool to choose any single flat colour along that gradient.

I'd love to see a colour history implemented which keeps track of the colours used, sorted in order of when last they were used. Bars could be added with stepped gradient swatches between the last two selected colours, or for various colour harmonies. Krita has this functionality built in, and I'd recommend using their implementation to study as a basis for a color mixing/swatch system overhaul. These additions can be kept out of the way by integrating them into the fill and stroke dialogues.

If anyone would like to see some mockups/proposals for it, let me know. :) -C

On Tue, Dec 29, 2015 at 10:12 AM, Alexandre Prokoudine < alexandre.prokoudine@...400...> wrote:

On Tue, Dec 29, 2015 at 12:00 AM, Martin Owens wrote:

...

Dear Ink-devels,

My friend has just complained that Inkscape doesn't have colour mixing. He's the first person to mention this functionality to me and I believe from his description the idea is that the colours can be mixed off canvas, where two color stops are selected and then a slider can move between the two.

Has anyone ever heard of this?

FYI,

http://stackoverflow.com/questions/10254022/implementing-kubelka-munk-like-k...

AFAIK, Krita devs ditched kubelka-munk color mixer after all, but I could be mistaken.

Alex

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If I were to write such a thing, I'd probably have it as a pallet option. "History Pallet" let's say whos contents are entirely dynamic and populated by firstly the last used colours and secondly by known colours (in case of opening)

Or, since we already have a swatch sub-menu, we could simply add a "History" checkmark option to it, like this (6-frame gif animation): http://www.opendesignstudio.org/inkscape/samples/ui_changes/history_swatch_a...

This could add a colour swatch to the front (left) side of the colour swatches every time a colour is chosen. That swatch would continue to change colour until the filled object is deselected, which commits that swatch to the stack, like this (3MB):

http://www.opendesignstudio.org/inkscape/samples/ui_changes/history_swatches...

Alternatively (or additionally), we could place a little history stopwatch icon beside the fill and stroke colour boxes, and when clicked, it could display a temporary floating swatch history box that disappears when a colour is chosen from it, or something else is clicked. This would have the advantage of keeping a separate history for fill vs stroke, which may be useful as well.

Thoughts?

-C

That way you can sort of say "Well I want this fixed pallet" or "this history pallet"

Also keeps it away from the fill and stroke which is already a bit beyond simple in terms of ux.

Martin,

C,

Here is a potentially related bug report (not for the mixing part, but for the history)... https://bugs.launchpad.net/inkscape/+bug/1048090

While not a bad idea, I'd rather the swatch history wasn't tool-specific. There are many ways to select/use a colour that don't involve the eyedropper tool.

My 2p. -C