lights.h File Reference

#include "tuples.h"
#include "helpers.h"
#include "libft.h"

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Data Structures
struct	s_light
	The struct s_light represents a light's source. This source has a position in space and an intensity color, i.e., red, purple etc. More...
struct	s_sight
	The struct s_sight represents the human eye looking forwards. More...

Typedefs
typedef struct s_light	t_light
	The struct s_light represents a light's source. This source has a position in space and an intensity color, i.e., red, purple etc. More...
typedef struct s_sight	t_sight
	The struct s_sight represents the human eye looking forwards. More...

Functions
t_light	point_light (t_point position, t_color intensity)
	The function point_light() instances a light's source of type t_light with a given position in space and a light color intensity. More...

Typedef Documentation

t_light

typedef struct s_light t_light

The struct s_light represents a light's source. This source has a position in space and an intensity color, i.e., red, purple etc.

ABOUT THE HEADER LIGHTS.H

The light algorithm implemented on this project is called The Phong Reflection Model, named by its creator Bui Tuong Phong. It simulates the interaction between three light sources. They are: ambient reflection, diffuse reflection and specular reflection. In other words, respectively, background light, the light reflected from a matte surface and the reflection of the source light itself. The last one, depends only on the angle between the reflection vector and the eye vector and is controlled by a parameter that's called shininess. The higher the shininess, the smaller and tigher the specular highlight is.

Parameters

position	Stores the point light's position.
intensity	Stores the information about how bright a point light is.
in_shadow	Stores TRUE or FALSE whether the light is being shadowed or not.

t_sight

typedef struct s_sight t_sight

The struct s_sight represents the human eye looking forwards.

For the Phong Reflection Model algorithm, this human sight has an eye vision, which is the direction where the eyes are looking at and it also has a normal vision, i.e., the perpendicular vector from where the eye vision is looking at.

Parameters

eyev	Represents the eye's vector looking at something.
normalv	Represents the normal vector of some surface.

Function Documentation

point_light()

t_light point_light	(	t_point	position,
		t_color	intensity
	)

The function point_light() instances a light's source of type t_light with a given position in space and a light color intensity.

Parameters

position	A struct of type t_tuple storing the light's source location in space.
intensity	A struct of type t_color containing the light's source color intensity.

Returns

Returns a light's source with a given location in space and a color intensity in RGB values.