Intersects a 3D image along the line specified by two points.
This operator intersects a 3D image along the line specified by two
points. The ray will intersect the iso-surface of the texture at the
density specified. If an intersection is found,
hit is 1 and
will contain the point position of the intersection.
Texture files will be searched for in the path specified by the
HOUDINI_TEXTURE_PATH environment variable.
3D image file used for look-up.
Channel to be integrated.
3D location in the image where to start integrating.
3D location in the image where to stop integrating.
The density at which to intersect the iso-surface.
Type of anti-aliasing filter to be used for evaluation. The options are:
Filter width in both u and v directions.