Conventions#
Handling NeRF dataset format#
Hint
Wisp’s acceleration structure follow the conventions of Structured Point Clouds (see OctreeAS
),
which require coordinates in the range of [-1, 1]
.
Wisp normalizes data to fit within the range of [-1, 1]
, which is opposite to the approach that Instant-NGP takes.
The diagram below illustrates the different flows:
Coordinate Spaces#
Camera Coordinates#
By default, the camera coordinates in wisp are aligned with OpenGL (right handed coordinate system).
This convention can be done by calling Camera.change_coordinate_system()
.
NDC Space#
The default NDC space in wisp uses a y-axis up, z points inwards (that is: a left handed SCREEN coordinate system).