Drag the sphere with your mouse to rotate it.

Syntax

You can create geometric constructions by writing valid sentences of the following syntax.

Valid sentences:

• name is construction
• name is hidden construction
• draw construction

A construction is one of the followings:

• point at NUMBER NUMBER NUMBER
• midpoint of name and name
• antipode of name
• intersection of name and name
• segment between name and name
• great circle of name
• polygon of name name name (more than 3 points are also supported)

Each sentence may have an optinal suffix: with color COLOR size NUMBER

A name is a name of an object. It consists of alphanumerals and digits.

For example, the following sentences are valid:

draw point at 0.2 0.3 0.4
p is point at 3 4 -2 with color red
q is hidden point at 3 2 1
draw segment between p and q
      

Source

The project source code can be found on GitHub. Feel free to open an Issue with ideas for improvements or bug reports.