Free Hero Mesh

* Message: A message name. User-defined message names have a # prefix;
standard message names have no prefix.

* Object: A reference to an object. There are no literals of this type.

* String: A string in quotation marks. There are no string manipulation
functions; the only thing that can be done with a string is to display it.
functions; the only thing that can be done with a string is to display it,
or to compare if one string matches another.

* Sound: A named sound effect. Values of this type cannot be compared with
anything, even other values of the same type.

* Mark: There is only one value of this type.

* Array: A reference to an array. You cannot allocate arrays at run time;
the available array memory is fixed at compile time, subject to the global
array definitions.

Some things are not their own types, and are other uses of numbers:

* Null: A null class or null object is represented as zero.

* Boolean: When a boolean is required as input to some instruction, zero
is false, and most other values (of any type) are true, except for sounds

ge  ( in1 in2 -- bool )
  Test if first input is greater or equal to second input (unsigned).

,ge  ( in1 in2 -- bool )
  Test if first input is greater or equal to second input (signed).

GetArray  ( array row column -- value )
  Read a value from an array. Coordinates are zero-based.

GetInventory  ( class image -- value true | false )
  Read from the inventory, with true if it exists or false if not.

gt  ( in1 in2 -- bool )
  Test if first input is greater than second input (unsigned).

,gt  ( in1 in2 -- bool )

  dismiss a quiz popup will be treated as a non-quiz input. IgnoreKey
  also causes the rest of the turn after the input phase to be skipped.

in  ( x mark ... - bool )
  Check if x is equal to any of the values above the mark; equality is
  tested the same as the "eq" instruction.

InitArray  ( array value -- ) **
  Fill all cells of an array with the specified value.

IntMove  ( dir -- bool ) **
  Similar to Move but do not initialize Inertia at all; use the current
  value of Inertia instead.

,IntMove  ( obj dir -- bool ) **
  Similar to ,Move but do not initialize Inertia at all; use the current
  value of Inertia instead.

SendEx  ( message arg1 arg2 -- value )
  Similar to ,SendEx but this object sends the message to itself.

,SendEx ( obj message arg1 arg2 arg3 -- value )
  Send a message to the specified object.

SetArray  ( array row column value -- ) **
  Write a value to an array. Coordinates are zero-based.

SetInventory  ( class image value -- ) **
  Sets an inventory item with the specified class and image number to the
  specified value (which must be a number). If there is no inventory item
  with that exact class and image, an inventory item will be added,
  otherwise the existing one is updated to the new value. Inventory values
  are always unsigned 16-bit numbers.