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.

<?xml version="1.0" encoding="utf-8"?>
<Pipeline version="1.0">
  <Writer type="writers.las">
    <Option name="filename">
      transformed.las
    </Option>
    <Filter type="filters.transformation">
      <Option name="matrix">
        0 -1  0  1
        1  0  0  2
        0  0  1  3
        0  0  0  1
      </Option>
      <Reader type="readers.las">
        <Option name="filename">
          untransformed.las
        </Option>
      </Reader>
    </Filter>
  </Writer>
</Pipeline>

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.