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Merge pull request #442 from natverse/feature/meshsupport
Improved support for neurons as meshes (WIP)
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Original file line number | Diff line number | Diff line change |
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# internal function | ||
# read a mesh representing a neuron and return a mesh3d object | ||
read.neuron.mesh <- function(x, ...) { | ||
ext=tools::file_ext(x) | ||
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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!") | ||
} | ||
} | ||
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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") | ||
} | ||
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write.neuron.ply <- function(x, file, binary=TRUE, ...) { | ||
write.neuron.mesh(x, file=file, format="ply", binary=binary, ...) | ||
} | ||
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write.neuron.obj <- function(x, file, ... ) { | ||
write.neuron.mesh(x, file=file, format="obj", ...) | ||
} | ||
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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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} |
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