<<<<<<<<<<<<<<<<<

conic(gert) Gert conic(gert)

NAME

conic

DESCRIPTION

Conic is a geometry object. It represents a unit conic surface relative to local coordinate system (x^2 + z^2 = y^2). The surface is bounded by planes y = 0 and y = 1, however disk x^2 + z^2 <= 1, y = 1 is not included (conic is "open", see also cone object). Since conic is a subclass of assembly, this geometry transforms into an arbitrary elliptical conic surface.

SUPERCLASS

geometry

INSTANCE VARIABLES

none

MESSAGES

intersect! finds ray-conic intersection.

near_far! calculates and returns supporting plane displacement for each of plane_normals.

normal! sets the normal to the surface.

row_products! calculates a matrix of pairwise scalar products of scene_to_local_transform. This matrix is used by "normal!" method.

transform_bounding_volume! transforms bounding volume center and radius to the global coordinate system.

EXAMPLE

/* Blue below should be defined as properties objects in GERT, DO NOT CONFUSE with property object in OSCAR. */ conic_1 := conic{ scale= (35,39,45) position=(0,0,15) properties=blue };