Tuesday, March 13, 2007

Cosmic Blobs Tutorials - Curve Pull, Area Pull & Curve Push

Cosmic Blobs has a number of tools designed to let us easily manipulate the surfaces of our blobs. Some of these tools can only be used in conjunction with the three drawing tools. The drawing tools are the Line Drawing Tool,the Arc Drawing Tool and the Freeform Curve Drawing Tool. The three tools can can only be used in conjunction with the drawing tools are the Curve Pull Tool, the Area Pull Tool and the Curve Push Tool. The first two of these tools works with a drawing on a blob. The Curve Push Tool only works with a drawing that is NOT on a blob.

The following tutorials demonstrate each of these tools individually.

Curve Pull Tool

The name of the Curve Pull Tool can be a bit misleading becuase we can use this tool to both pull and push to lift or depress the surface of a blob under and around a drawn line. The Influence Slider determines how the Pull or Push affects the surface. It's useful for creating a mouth or pulling up an eyebrow ridge.

Play Tutorial #12 - The Cosmic Blobs Curve Pull Tool

Area Pull Tool

Like the Curve Pull Tool, this tool can push as well as pull. This tool is only activated when an area is enclosed by one or more joined lines that create a boundary around an area on the blob. Istead of simply pulling under and around the lines, this tool pulls the entire area defined by the lines. This tool is excellent for pulling out the neck, snout or ears of an animal or pushing in an area to form eye-sockets.

It's also useful to add complexity to things like robots. Used with Cosmic Blobs 'Stickers', it can add a three dimensional effect to flat drawings.

Play Tutorial #13 - The Cosmic Blobs Area Pull Tool

Curve Push Tool

This is the only tool of those that utilize the drawing tools to require that the drawing be done in space and not on the blob. It only works by being pushed toward the blob. The Influence Slider determines how much the push will affect the blob's surface. The important thing to remember is that while we may draw a simple line, the Curve Push Tool will treat it a plane and affect a wide area of the blob horizontally.

Of the the three tools, this is the most difficult to use and the least predictable. But, once harnessed it can do things like turn the sharp edge of a cube into a nicely curved edge (Filet).

Play Tutorial #14 - The Cosmic Blobs Curve Push Tool

Here is a sample using both Curve Pull and Area Pull to add complexity to the shape of an insect robot's head.

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