# filters.transformation¶

The transformation filter applies an arbitrary rotation+translation transformation, represented as a 4x4 matrix, to each xyz triplet.

The filter does no checking to ensure the matrix is a valid affine transformation — buyer beware.

Note

The transformation filter does not apply any spatial reference information — if spatial reference information is desired, it must be specified on another filter.

## Example¶

This example rotates the points around the z-axis while translating them.

{
"pipeline":[
"untransformed.las",
{
"type":"filters.transformation",
"matrix":"0 -1  0  1  1  0  0  2  0  0  1  3  0  0  0  1"
},
{
"type":"writers.las",
"filename":"transformed.las"
}
]
}


## Options¶

matrix
A whitespace-delimited transformation matrix. The matrix is assumed to be presented in row-major order. Only matrices with sixteen elements are allowed.

## Notes¶

The transformation filter does not apply any spatial reference information — if spatial reference information is desired, it must be specified on another filter.