virtualMeshScan: remove all parts of a triangular mesh, not visible from a set...

In Morpho: Calculations and Visualisations Related to Geometric Morphometrics

remove all parts of a triangular mesh, not visible from a set of viewpoints

Description

remove all parts of a triangular mesh, not visible from a set of viewpoints

Usage

virtualMeshScan(x, viewpoints, offset = 0.001, cores = 1)

Arguments

x	triangular mesh of class 'mesh3d'
viewpoints	vector or k x 3 matrix containing a set of viewpoints
offset	value to generate an offset at the meshes surface (see notes)
cores	integer: number of cores to use (not working on windows)

Value

returns a list containing subsets of the original mesh

visible	the parts visible from at least one of the viewpoints
invisible	the parts not visible from the viewpoints

Note

The function tries to filter out all vertices where the line connecting each vertex with the viewpoints intersects with the mesh itself. As, technically speaking this always occurs at a distance of value=0, a mesh with a tiny offset is generated to avoid these false hits.

Examples

SCP1 <- file2mesh(system.file("extdata","SCP1.ply",package="Morpho"))
viewpoints <- read.fcsv(system.file("extdata","SCP1_Endo.fcsv",package="Morpho"))
## Create a quick endocast
quickEndo <- virtualMeshScan(SCP1,viewpoints)
## Not run: 
rgl::shade3d(quickEndo$visible,col="orange")
rgl::shade3d(SCP1,col="white",alpha=0.5)

## End(Not run)

Morpho documentation built on Feb. 16, 2023, 10:51 p.m.