vcg_raycaster: Cast rays to intersect with mesh

In dipterix/ravetools: Signal and Image Processing Toolbox for Analyzing Intracranial Electroencephalography Data

Cast rays to intersect with mesh

Description

Cast rays to intersect with mesh

Usage

vcg_raycaster(
  x,
  ray_origin,
  ray_direction,
  max_distance = Inf,
  both_sides = FALSE
)

Arguments

x	surface mesh
ray_origin	a matrix with 3 rows or a vector of length 3, the positions of ray origin
ray_direction	a matrix with 3 rows or a vector of length 3, the direction of the ray, will be normalized to length 1
max_distance	positive maximum distance to cast the normalized ray; default is infinity. Any invalid distances (negative, zero, or NA) will be interpreted as unset.
both_sides	whether to inverse the ray (search both positive and negative ray directions); default is false

Value

A list of ray casting results: whether any intersection is found, position and face normal of the intersection, distance of the ray, and the index of the intersecting face (counted from 1)

Examples

library(ravetools)
sphere <- vcg_sphere(normals = FALSE)
sphere$vb[1:3, ] <- sphere$vb[1:3, ] + c(10, 10, 10)
vcg_raycaster(
  x = sphere,
  ray_origin = array(c(0, 0, 0, 1, 0, 0), c(3, 2)),
  ray_direction = c(1, 1, 1)
)

dipterix/ravetools documentation built on June 13, 2025, 11:37 a.m.