GAViewer 0.43 manual (.pdf)

2.2. THE CONSOLE 11
2.1.6 View window control summary
rotate
translate
select
select, copy name to console
translate/modify
left mouse drag
middle mouse drag and
right mouse drag
ctrl left mouse click
ctrl middle mouse click
ctrl right mouse drag
2.2 The console
The console is used to do interactive computations. On the console, you can
write geometric algebra expressions and a lot more, as described in the chapter
4. Here, we describe only the user interface of the console.
To type something on the console, click somewhere after the current prompt
(>>) to place the cursor where you want it. Then type away. If you click before
the current prompt, the first character you type will be lost and the cursor will
jump to the end of the current input.
You can select text by dragging the mouse, or holding shift and using the
arrow keys. Copy selected text with ctrl-c. You can paste text using ctrl-v. Cut
using ctrl-x.
To jump from one bracket to the first one matching it, use ctrl-e. Forexample,
type something like:
>> a = ((c . b) x[3 i]) ˆ y
Locate the cursor at any of the brackets, and press ctrl-e. The cursor will jump
to the matching bracket.
To execute what you have typed, press enter.
To retrieve previous commands, press the up arrow, usethedown arrow
to get back again.
The console is based on the FLTK FL Text Editor widget, so if you want to
know more details, see the FLTK documentation.
2.3 Object controls window
In this section, we assume you have executed the following line from the previous
section:
>> a = no, b = green(e1), c = e2 ˆ e3
You can execute it again if you want the original objects back.
When you ctrl left click one of the objects in the view window, it becomes
the current object and you can control it somewhat using the object controls
window on the right of GAViewer (see figure XXX).
Atthetopofthewindow,youseethenameofthecurrentobject.Thetwo
buttons below can be used to remove or hide that object.
For most objects, you can set the foreground color and alpha (opacity) using
the set foreground color and alpha widgets. Some objects, like labels, also
have an outline or background color.