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display_modeller(display) Display display_modeller(display)

NAME

display_modeller - an abstract object that provides instance variables and methods for its subclasses.

DESCRIPTION

Display_modeller is an abstract class that provides instances variables and methods for its subclasses. Subclasses of display_modeller are modellers that convert display_data into rendering primitives. This conversion essentially involves the creation of the appropriate rendering primitives, and mapping scalar data (if available) through the lookup_table object.

SUPERCLASS

modeller

INSTANCE VARIABLES

data_in an input display_data object.

range a (minimum,maximum) range used to map the scalar data in the display_data through the lookup_table object.

scalar_visibility Boolean flag that controls whether scalar data colors the graphics objects, or whether the actors color is used to color the object.

mask A list of (0,1) values that indicate whether the particular display_data geometric primitive is on or off.

MESSAGES

data_in= object_name Set the name of the inpout display_data object. Of course, any object (such as a display_filter) that responds to a "data?" message may be used.

data_in? Get the name of the input display_data object.

range= (min,max) The minimum/maximum value of range used to map the scalar data through the lookup_table object. The range does not have to correspond to the actual range of the scalar data, other values can be used to selectively color the object.

range? Get the current range value.

mask= (b1,b2,...,bn) Mask the geometric entities by setting boolean flags b1->bn. A nonzero value indicates that the

geometric entity is visible.

mask? Get the current mask.

EXAMPLE

Display modeller is not meant to be instantiated.