The drag mode is very useful to demonstrate, how geometrical objects are related to each other. Right now only points can be dragged around. After every construction KGeo switches from construction mode back to the drag mode. Due to that you have to select a tool again to continue constructing some figure.

Points can have a trace mode which means they leave a trace over every place they move. You can apply the trace mode with the following tool . After that you can click on the point that should leave a trace. You can turn off the trace mode by applying the trace mode tool a second time.

This is an example of a point leaving a trace.

Construct a point.

Construct a point at (x;y).

Construct a point on a line or on a circle. This means that the point is attached to those objects.

Construct the point of concurrency of two lines, segments, rays and so on. Since you cannot drag around a point of concurrency, it is drawn as a little square.

Construct the bisection between two points.

Construct a mirror point. You can either mirror the point at another point or at a line. The first point you click on is the one that will be mirrored. Then you can click the line or the second point.

Rotate a point around another point. The angle will taken from a already constucted angle. The first point you click on is the one that will be rotated and and the second point is the center of the rotation.

Move a point. Click on a point that you want to move and then on a vector that defines the movement.

Construct a segment between two points. The points do not need to exist, they will be constructed, as soon as you click on an empty spot.

Construct a segment. You also need to points for that.

Construct a triangle. You need three points for that.

Construct a vector. A vector is segment with a direction. You need a vector to move a point.

Construct a ray.

Constrcut a parallel line. You need to click on an existing line and then choose a point through which the parallel line should run.

Constrcut a perpendicular line. You need to click on an existing line and then choose a point through which the perpendicular line should run.

Construct a circle. The first point is the center and the second point defines the diameter.

Construct a circle with a fixed diamter which will be entered through a dialog.

Construct an angle. You need three points for that where the second point is the center of that angle.

Measure the distance beween two points.

Measure the area of a circle.

Measure the angle in degree.

Measure the slope of two points or a line.

Measure the circumference of a circle.

This tool binds a point on circle or any kind of line.

This tool toggles the trace mode.

With this tool you can delete an object and all of its child objects.

With this tool, you can move the underlying grid.

Adding a text field to your construction.

With these tools, you can change the color of an object.

With this tool, you can change the size of an object.

To use KGeo, you need KDE 3.X and Qt™ 3.X.

You can find KDE at http://www.kde.org/, Qt™ at www.trolltech.com.

In order to compile and install KGeo on your system, type the following in the base directory of the KGeo distribution:

% ./configure
% make
% make install

Since KGeo uses autoconf and automake you should have no trouble compiling it. Should you run into problems please report them to the KDE mailing lists.

You can also reach the author directly at <marc.bartsch@web.de>

If you want to delete KGeo from your system, please type:

% su
% Password:
% make uninstall