(swplot-raytriangle)=

# swplot.raytriangle

## Syntax
  
`swplot.raytriangle(V,F,ray)`
  
## Description
  
`swplot.raytriangle(V,F,ray)` determines if a given ray crosses within a
triangle defined by its vertex coordinates. The code is optimised for
a single ray and multiple triangles.
  
## Input Arguments
  
`V`
: Vertex positions in a matrix with dimensions $[n_{vertex}\times 3]$.
  
`F`
: Faces in a matrix with dimensions $[n_{face}\times 3]$, where 
      $max(F) = n_{vertex}$.
  
`ray`
: Definition of the ray via 2 points in space, stored in a matrix with
  dimensions of $[2\times 3]$. The two points of the ray, $P_1$ and
  $P_2$, are stored in the first and second rows respectively. The ray
  points from $P_1$ to $P_2$.