materials.h File Reference

#include "lights.h"
#include "patterns.h"

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Data Structures
struct	s_material
	A material has a surface color and four attributes from the Phong Reflection Model: ambient, diffuse, specular and shininess. Each one of these attributes accept a non negative floating point number. For ambient, diffuse and specular, the typical values are between 0 and 1. For shininess, values between 10 (very large highlight) and 200 (very small) highlight seem to work best, though there is no actual upper bound. More...
struct	s_exposure
	The struct s_exposure contains the necessary fields to calculate the a scene's lighting. Exposure is a technical term from photography that means exposition to light. More...

Typedefs
typedef struct s_material	t_material
	A material has a surface color and four attributes from the Phong Reflection Model: ambient, diffuse, specular and shininess. Each one of these attributes accept a non negative floating point number. For ambient, diffuse and specular, the typical values are between 0 and 1. For shininess, values between 10 (very large highlight) and 200 (very small) highlight seem to work best, though there is no actual upper bound. More...
typedef struct s_exposure	t_exposure
	The struct s_exposure contains the necessary fields to calculate the a scene's lighting. Exposure is a technical term from photography that means exposition to light. More...

Functions
t_material	material (void)
	The function material() instances a new material of struct type t_material with the following default values: color = {1, 1, 1}, ambient = {0.1, 0.1, 0.1}, diffuse = 0.9, specular = 0.9 and shininess = 200. Thus, as default no pattern is applied. More...

Typedef Documentation

t_exposure

typedef struct s_exposure t_exposure

The struct s_exposure contains the necessary fields to calculate the a scene's lighting. Exposure is a technical term from photography that means exposition to light.

Parameters

effective_color	Combines the surface colo with light's color/ intensity.
lightv	Finds the direction to the light source.
reflectv	Finds the direction to the light reflection.
light_dot_normal	Represents the cosine of the angle between the light vector and the normal vector. A negative number means the light is on the other side of the surface.
reflect_dot_eye	Represents the cosine of the angle between the reflection vector and the eye vector. A negative number means the light reflects away from the eye.
factor	Computes the specular contribution.

t_material

typedef struct s_material t_material

A material has a surface color and four attributes from the Phong Reflection Model: ambient, diffuse, specular and shininess. Each one of these attributes accept a non negative floating point number. For ambient, diffuse and specular, the typical values are between 0 and 1. For shininess, values between 10 (very large highlight) and 200 (very small) highlight seem to work best, though there is no actual upper bound.

Parameters

color	Stores the material's color in RGB values.
ambient	Represents the background lighting or the light reflected from other objects in the enviroment.
diffuse	Represents the light reflected from a matted surface. It depends only on the angle between the light source and surface normal.
specular	Represents the reflection of the light source itself and results in the bright sport on a curved surface. It depends on the angle between the reflection vector and the eye vector. Thus, it's also controlled by the parameter shininess.
shininess	Represents the shininess. The higher the shininess, the smaller and tigher the specular highlight.
pattern	Represents the pattern texture of a given material. It can be a striped or a checkered pattern.

Function Documentation

material()

t_material material

(

void

)

The function material() instances a new material of struct type t_material with the following default values: color = {1, 1, 1}, ambient = {0.1, 0.1, 0.1}, diffuse = 0.9, specular = 0.9 and shininess = 200. Thus, as default no pattern is applied.

Returns

Returns a default instance of the new material.