PlyReader

Full name Microsoft.VisualBasic.Imaging.Landscape.Ply.PlyReader Assembly Microsoft.VisualBasic.Imaging.Landscape Members 16

PLY point cloud file reader. Supports ASCII, binary_little_endian, and binary_big_endian format variants. Parses vertex elements into PointCloud objects with automatic property mapping for x, y, z, intensity, and color channels.

01 Syntax

Microsoft.VisualBasic.Imaging.Landscape.Ply.PlyReader

02 Methods

Name	Overloads	Summary
ReadFile	1	Read a PLY file from the given path and return parsed point cloud data.
ReadStream	1	Read PLY data from an open stream.
LocateHeaderEnd	1	Locates the end of the ASCII header in the stream and reads header text.
ParseHeaderText	1	Parses the PLY header text to extract the vertex element format.
GetPropertyByteSize	1	Returns the byte size for a PLY scalar property type.
ReadAsciiVertices	1	Reads ASCII-format vertex data from the stream starting at dataStartPos.
ReadBinaryVertices	1	Reads binary-format vertex data from the stream starting at dataStartPos.
ReadBinaryPropertyValue	1	Reads a single binary property value and returns it as Double.
ReadListCount	1	Reads the count value for a list-type PLY property.
BuildPropertyMapping	1	Builds a property-to-field index mapping from vertex property definitions.
SwapEndian	6	Swaps endianness for a Double value.

03 Members

method ReadFile #

ReadFile(String)

Read a PLY file from the given path and return parsed point cloud data.

Parameters

Name	Type	Description
`path`	`String`	File path to a .ply file.

Returns

Array of PointCloud parsed from vertex elements.

method ReadStream #

ReadStream(Stream)

Read PLY data from an open stream. The stream must be readable and seekable. Auto-detects ASCII vs binary from the header and delegates to the appropriate parser.

Parameters

Name	Type	Description
`stream`	`Stream`	Readable, seekable stream positioned at the PLY header.

Returns

Array of PointCloud parsed from vertex elements.

method LocateHeaderEnd #

LocateHeaderEnd(Stream, String, Int64)

Locates the end of the ASCII header in the stream and reads header text. After this call, dataStartPosition will point to the first byte after the newline following "end_header".

method ParseHeaderText #

ParseHeaderText(String)

Parses the PLY header text to extract the vertex element format.

method GetPropertyByteSize #

GetPropertyByteSize(String)

Returns the byte size for a PLY scalar property type.

method ReadAsciiVertices #

ReadAsciiVertices(Stream, Int64, PlyVertexFormat)

Reads ASCII-format vertex data from the stream starting at dataStartPos.

method ReadBinaryVertices #

ReadBinaryVertices(Stream, Int64, PlyVertexFormat, Boolean)

Reads binary-format vertex data from the stream starting at dataStartPos.

method ReadBinaryPropertyValue #

ReadBinaryPropertyValue(BinaryReader, String, Boolean)

Reads a single binary property value and returns it as Double. Advances the stream by the appropriate number of bytes.

method ReadListCount #

ReadListCount(BinaryReader, String, Boolean)

Reads the count value for a list-type PLY property.

method BuildPropertyMapping #

BuildPropertyMapping(PlyPropertyDef())

Builds a property-to-field index mapping from vertex property definitions.

method SwapEndian overload 2 #

SwapEndian(Int16)

Swaps endianness for a Short value.

method SwapEndian overload 5 #

SwapEndian(UInt16)

Swaps endianness for a UShort value.

method SwapEndian overload 3 #

SwapEndian(Int32)

Swaps endianness for an Integer value.

method SwapEndian overload 6 #

SwapEndian(UInt32)

Swaps endianness for a UInteger value.

method SwapEndian overload 4 #

SwapEndian(Single)

Swaps endianness for a Single value.

method SwapEndian #

SwapEndian(Double)

Swaps endianness for a Double value.