s_comps Struct Reference

This structure of type t_comps stores some precomputed values that are useful when working intersections and their color calculations. More...

#include <world.h>

Collaboration diagram for s_comps:

Data Fields
float	t
t_shape *	object
t_point	point
t_sight	sight
t_bool	inside
t_tuple	over_point

Detailed Description

This structure of type t_comps stores some precomputed values that are useful when working intersections and their color calculations.

Parameters

t	Stores the intersection value at a given point, if any.
object	Stores shape's data.
point	Stores a point to be used as referenece.
sight	Stores the human's eye data used as reference.
inside	Stores TRUE or FALSE in regards to whether a hit occurs inside the object (or shape). If hit is inside the shape, the value is TRUE. Otherwise, it's is FALSE. It works together with the field over_point to fix a problem called acne.
over_point	This field avoids the effect called acne, which happens because computers cannot represent floating points very well. Because of that, sometimes the calculation of the ray-surface intersection will result in a point of intersection that lies beneath the actual surface of a given shape. This field sets a margin of error.