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Blender 2.49 Scripting by Michel J. Anders

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I'll keep an eye on you

Sometimes, when working with a complex object, it is difficult to keep track of a relevant feature as it may be obscured by other parts of the geometry. In such a situation, it would be nice to highlight certain vertices in a way that keeps them visible, no matter the orientation, and independent of the edit mode.

Space handlers provide us with a way to perform actions each time the 3D view window is redrawn or a key or mouse action is detected. These actions may include drawing inside the 3D view area as well, so we will be able to add highlights at any position we like.

How do we determine which vertices we would like to highlight? Blender already provides us with a uniform way to group collections of vertices as vertex ...

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