graffiti

Section: User Commands (1)
Updated: August 19 1992
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NAME

graffiti - draw lines on geomview objects

DESCRIPTION

Graffiti is a geomview module which allows you to draw polygonal lines on objects in the geomview window. The Graffiti panel has buttons labeled "Draw", "Undo", "Vertices Only", and "Quit". To start drawing, press the Draw button. While the Draw button is down, you may interactively draw a polygonal line with vertices on objects in the geomview window; clicking the right mouse button on any object in the geomview window will cause a vertex to be added to the line. Throughout the drawing process, the initial point (the "tail") of the line is shown in a small box, and the last point (the "head") is shown in a small pyramid. If you click the right mouse button on the line's tail (the small box), graffiti closes up the line segment. To end the line segment without closing it up, just press the Draw button in the graffiti window again.

Pressing the Undo button in the graffiti window while drawing a line will undo the line's last vertex.

The Vertices Only button, when on, causes graffiti to only recognize vertices in geomview objects. Use this button to force your line's vertices to coincide with those of existing geomview objects.

The Quit button exits graffiti.

BUGS

The cube and pyramid which indicate the tail and head of the line are drawn with an absolute size which may or may not be appropriate for all geomview objects.

The object created by graffiti is named "graffiti". If you quit graffiti and start it up a second time in the same geomview session, it uses this same name, thereby destroying the graffiti object you created the first time.

Graffiti can create a maximum of 100 distinct polygonal lines having at most a total of 1000 vertices.

AUTHOR

Mark Phillips
Geometry Center