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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| # internal function | ||
| # read a mesh representing a neuron and return a mesh3d object | ||
| read.neuron.mesh <- function(x, ...) { | ||
| ext=tools::file_ext(x) | ||
|
|
||
| if(ext=="ply") { | ||
| if(!requireNamespace('Rvcg', quietly = TRUE)) | ||
| stop("Please install suggested library Rvcg to read .ply files!") | ||
| Rvcg::vcgPlyRead(x, updateNormals=F, ...) | ||
| } else if(ext=="obj") { | ||
| if(!requireNamespace('readobj', quietly = TRUE)) | ||
| stop("Please install suggested library readobj to read .obj files!") | ||
| res=readobj::read.obj(x, convert.rgl = TRUE) | ||
| if(length(res)>1) | ||
| warning("Only reading 1/",length(res)," objects in: ",x) | ||
| res[[1]] | ||
| } else { | ||
| stop("Unrecognised mesh file format!") | ||
| } | ||
| } | ||
|
|
||
| is.ply<-function(f=NULL, bytes=NULL) { | ||
| if(!is.null(bytes) && is.character(f) && length(f)>1) | ||
| stop("Can only check bytes for a single file") | ||
| tocheck=if(is.null(bytes)) f else bytes | ||
| generic_magic_check(tocheck, "ply") | ||
| } | ||
|
|
||
| write.neuron.ply <- function(x, file, binary=TRUE, ...) { | ||
| write.neuron.mesh(x, file=file, format="ply", binary=binary, ...) | ||
| } | ||
|
|
||
| write.neuron.obj <- function(x, file, ... ) { | ||
| write.neuron.mesh(x, file=file, format="obj", ...) | ||
| } | ||
|
|
||
| write.neuron.mesh <- function(x, file, format=c("ply", "obj"), ...) { | ||
| if(!requireNamespace('Rvcg', quietly = TRUE)) | ||
| stop("Please install suggested library Rvcg to write .",format," files!") | ||
| if(!inherits(x, 'mesh3d')) { | ||
| x=tryCatch(as.mesh3d(x), error=function(e) stop("Unable to convert x to mesh3d object! Only neuron meshes can be written in ",format," format!")) | ||
| } | ||
| if(format=="ply") | ||
| Rvcg::vcgPlyWrite(x, filename=file, writeCol = F, writeNormals = F, ...) | ||
| else if(format=="obj") | ||
| Rvcg::vcgObjWrite(x, filename=file, writeNormals=F, ...) | ||
| else stop("Unknown format") | ||
|
|
||
| } |
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