TA meeting day?  Monday  (after 5 or at 10)
Blog/NG?  Blog
Java3D versus OpenGL/Java versus Graphics2D?  Graphics2D
MDD

Game loop
  check key presses
    don't actually change anything, but tell the objects
  tick all
    motion (including friction & gravity)
    try not to rely on information from other gizmos
    ordering shouldn't matter much for ticking
    hold on to old position information for later collision resolution
  collision handling
    including triggers
    objects should deal with key presses now
  redraw
    dirty rectangles
      use old position information as well as new to find correctly

  Are there any problems with collision resolution and friction/gravity

editor UI
  combination of The Incredible Machine and Qt3 Designer
  don't separate "tools" from "gizmos"
    arrow tool
    have "create connection tool"
    have "create key trigger tool"

  for controls (ie rotate), place clickable zones immediately adjacent
   to the selected gizmo
    "frobbers"
    pie-menu-like
    Fitt's law!
    Rotate, delete, color?
    Maybe connect

  snap to grid option

  connections
    Create connection tool and drag between two objects
    Also support clicking on one, then the other
      Easy to determine which the user is doing
      Flexibility!
      One problem
        What if the user clicked on one, but then changes their mind and
	 wants to connect from another?
	Modality of clicking should fix this
    Click on a not gizmo to cancel
    Draw arrow as they move
      Indicates mode
    When an object is selected, display arrows to everything it is
     connected to
    View options for displaying:
      Gizmos that trigger it
      Gizmos it triggers
      User control and freedom

  if you can't place something, put an X over it

  setting ball velocity
    Have a frobber the switches to set-velocity mode, then next click
     places velocity vector
      But this is modal
      Difficult to set to zero
    Always have a velocity vector whose tip can be dragged
      Difficult to set to zero
      May conflict with other clickable things
    Displaying a vector may get confusing with connection arrows
    Decided on frobber
      Snap to common directions and zero
      Hold down a modifier to disable snap
        Bad, but standard

  Triggers pane
    What to display?
      Names of objects
	User can set if they want, but at least it gives the type of 
         the gizmo
    Highlight arrow when selected
      Even if connection display is off
    No, wait.  Put these in the properties list, but make it a tree
      Property for incoming triggers and another for outgoing triggers

  Able to switch back and forth between playing and editing quickly
    Without saving

  Toolbar
    Load, save
    Visibility
    Snap
    Switch between play and edit
    Undo
      A great way to support exploration!
      Will need a good, generalized properties system to support this
       and simultaneously keep our sanity

    Always display toolbar, but change (or change which toolbars are
     visible)

  How to connect something to itself?
    Draw a loopy edge

Gizmo properties
  type
  orientation
  color
  triggers
  name
  location
  velocity


Stuff to do tomorrow
  Agree on TA meeting time
  MDD
  Timeline
  Who writes what