The min-x, max-x, min-y, and max-y arguments specify the dimensions of the board plane to be visible in the window by default.
The lift argument specifies how many units a piece moves vertically when the user clicks on it.
The move function is called when a piece is moved to a space (possibly it’s current space), when a space is clicked on, and when a space is dragged to another space. The move function is given the information of the piece or space selected and the coordinates to which it is moved.
The who argument is used for reporting an error to the user when GL is unavailable at run time.Adds a space to the board. The draw thunk should draw the space (using GL commands) when called. The info value is given to the move function (supplied to the constructor) when the space is selected.Adds a piece to the board. The draw thunk should draw the piece (using GL commands) when called. The info argument is given to the move function (supplied to the constructor) when the piece is moved. The piece is translated by x, y, and z before drawing.Removes all pieces previously added with representative info.Add a “heads-up” display element whose size is w by h units with the given draw thunk and info reprsentative.Removes all “heads-up” displays elements previous added with representative info.Sets the drawing function of all spaces added with representative info.Sets the drawing function of all pieces added with representative info.Enables or disables moving of all pieces added with representative info.reports whether the first piece with representative info is enabled.
(send a-gl-board get-pieces) → list? (send a-gl-board get-spaces) → list? (send a-gl-board get-heads-up) → list?Returns values for various kinds of content currently on the board. The result corresponds to info values given to add-piece, etc.