# writers.gltf

GLTF is a file format specification for 3D graphics data. If a mesh has been generated for a PDAL point view, the GLTF Writer will produce simple output in the GLTF format. PDAL does not currently support many of the attributes that can be found in a GLTF file. This writer creates a binary GLTF.

Default Embedded Stage

This stage is enabled by default

## Example

    [
        "infile.las",
        {
            "type": "filters.poisson",
            "depth": 12
        },
        {
            "type":"writers.gltf",
            "filename":"output.glb",
            "red": 0.8,
            "metallic": 0.5
        }
    ]

## Options

filename

  Name of the GLTF (.glb) file to be written. [Required]

metallic

  The metallic factor of the faces. [Default: 0]

roughness

  The roughness factor of the faces. [Default: 0]

red

  The red component of the color applied to the faces. [Default: 0]

green

  The green component of the color applied to the faces. [Default: 0]

blue

  The blue component of the color applied to the faces. [Default: 0]

alpha

  The alpha component to be applied to the faces. [Default: 1.0]

double_sided

  Whether the faces are colored on both sides, or just the side visible from the initial observation point (positive normal vector). [Default: false]

where

  An expression that limits points passed to a writer. Points that don’t pass the expression skip the stage but are available to subsequent stages in a pipeline. [Default: no filtering]

where_merge

  A strategy for merging points skipped by a ‘where’ option when running in standard mode. If `true`, the skipped points are added to the first point view returned by the skipped filter. If `false`, skipped points are placed in their own point view. If `auto`, skipped points are merged into the returned point view provided that only one point view is returned and it has the same point count as it did when the writer was run. [Default: `auto`]