Réflexion diffuse
Diffuse Reflection
Programmation 2D/3D
16
Une diffusion dont la lumière est
dispersée sur la surface de
manière similaire dans toutes les
directions s’appelle une réflexion
diffuse.
Ceci est courant dans les surfaces
terne. Dans ce cas, la surface
apparait de manière similaire
dans toutes les directions.
La couleur d’un objet est la
couleur de la réflexion diffuse.
Effets de Lumiere sur les Surfaces des Matériaux
Optique et Infographie
If you hold a flat sheet of
paper up to a lamp in a
dark room,
it will appear brightest
when it faces the lamp
head-on,
and appear dimmer as
you rotate it away from
the light, reaching its
darkest when it's
perpendicular to the
light.
Curved surfaces behave
the same way; if you roll up
or crumple the paper, its
surface will be brightest
where it faces the light the
most directly.
If the paper and light remain stationary but you move your
head, the paper's apparent color and brightness won't
change.
The surface reflects light evenly in every direction, or
"diffusely." This basic lighting effect is thus called diffuse
reflection. The wider the angle between the surface normal
and the light direction, the darker the paper appears.