Hi. I will comment of some of your questions...

On Mon, Feb 8, 2010 at 1:38 PM, Steve Thomas sthomas1@gosargon.com wrote:

Folks couple of questions:

For Variable type "ImageResolution" how can I use this? I could not find a matching attribute to set. FYI, valid values from pull down are

original (can use a lot of disk space) 256 colors 256 grays 4 grays black and white

ImageResolution is used by VideoMorph that appear as "Camera" in Multimedia category in Object catalog.

For imported images, how can I change the resolution?

I believe the type is applicable to only VideoMorph at this time.

When I try to change a variable type to "Patch" I get a "Message Not Understood" message What is a Patch and how would I use it in Etoys?

Patch is special concept used in "Kedama" that is particle simulation system developed by Yoshiki Ohshima. You could use Kedma by drag "Particles" from Object Catalog. Tutorial for older version is http://wiki.squeakland.org/display/sq/Documents+on+Kedama

Patch variable can be created only with "add a new patch variable in viewer menu of Kedamaworld.

/Korakurider

If you import an image; from menu choose "set as background";

THEN... How do you clear the background image? Note this is a better way to set the background than painting a background (with one BIG exception, it seems to use the image and repeat it to fill the background, so there is no "single smaller than world" image that you can easily use (yes, you could embed in a transparent sketch the size and background color of the world) When you set the background, the World's color attribute seems to be set to the image. To test this:

drag an image into Etoys click on the images menu and then "set as backgroung" From the world's viewer, go to category color (or "fill and border") then drag out the assignment operator to make a script to set the color import another picture and set it as background the background to the previous image... So is color simply a graphic used for fill?

Stephen _______________________________________________ etoys-dev mailing list etoys-dev@squeakland.org http://lists.squeakland.org/mailman/listinfo/etoys-dev

On Feb 7, 2010, at 8:38 PM, Steve Thomas wrote:

• If you import an image; from menu choose "set as background"; • THEN... How do you clear the background image?

To reverse the effect of "set as background", simply set the world's color, via its halo, to some color, any color.

There are two quite different uses of the term "background" when referring to the etoys "world", corresponding to two different "layers" of background. This must be very confusing!

(1) There is the world's own "color". This is usually a conventional color, such as white or blue, but if you use the "set as background" feature that Steve refers to, the world's "color" gets set to a kind of "wallpaper" built by replicating the image you designate. The "wallpaper color" *replaces* the color the world formerly had. It is *unrelated* to the "background painting" feature.

(2) Quite separately, the world also has an optional "background painting" which can be created and changed via the "repaint" handle on the world's halo.

Both kinds of "background" can exist at the same time; if you experiment with this you'll quickly learn that the world's "color", whether it's a conventional color or a "wallpaper" pattern derived from a graphic, occupies a layer *behind* the world's "background painting", if any.

Incidentally the world's "pen trails" occupy a layer *between* the color/wallpaper layer and the background-painting layer!

Cheers,

-- scott