I don't believe this was ever implemented.  I think it's an interesting idea.  I made the same comment last year -- make sure you take a look at the new PShape classes if  you can integrate a tool with createShape() that would be ideal.

Hello,

I made a similar drawing tool once, far from finished and with lots of ideas and code from the forum (especially a great color selector).

Features:

• Notebook with a few independent pages to paint on (switch between multiple drawings), Idea from the forum.
  
• multilanguage (German and English so far)
• select a 2D or 3D shape type with the mouse (screen buttons with good mouse over help text)
  
• draw the shape with the mouse
• while you hold the mouse you can change the size (x,y) or press esc to stop this shape
• release the mouse and the shape is drawn
• select fill and stroke color independently. Great color selector from the forum.
• Hit F1 for help.
  

Editing existing objects

• With screen button " * " you browse the shapes with cursor left and right
• selected item is white outlined
  
• hit return to edit it
• choose here from a dialog to change its position in x,y direction or in depth direction or choose size to change size etc.
  
• hit return to save changes or esc to discard them

Problems

• not finished
• some flaws in translation and UI
• no save and load (screen buttons don't work)

http://www.openprocessing.org/sketch/97381

Feel free to use it.


Greetings, Chrisir