lighting: Lighting Functions

In misc3d: Miscellaneous 3D Plots

Description

Functions to compute colors modified for lighting effects.

Usage

phongLighting(normals, view, light, color, color2, alpha, material = "default")
perspLighting(normals, view, light, color, color2, alpha, material = "default")

Arguments

normals	numeric matrix with three columns representing surface normal vectors.
view	numeric vector of length 3 representing the direction to the viewer.
light	numeric vector of length 3 or 4. The first three elements represent the direction to the light. The fourth element, if present, represents light intensity; the default is 1.
color	colors to use for faces in the direction of the normal vectors.
color2	opposite face color.
alpha	alpha channel level, a number between 0 and 1.
material	material specification. Currently possible values are the character strings "dull", "shiny", "metal", and "default".

Details

phongLighting uses the Phong lighting model to compute colors modified for view direction, light direction, and material properties. perspLighting implements approximately the same lighting model as the persp function.

Value

Vector of color specifications.

misc3d documentation built on Oct. 8, 2021, 1:06 a.m.