This node is meant to work in conjunction with PxrProjectionLayer but can be used as a general projection manifold. This manifold supports camera, spherical and cylindrical mapping. It encapsulates 2D parameterization for pattern generators and allows transformations and selection of arbitrary variables bound to primitives.
Projection
Select a projection:Coordinate System
You must set a coordinate system. This field can not be left empty. |
Use
__Pref
and __Nref
that should be present on the deforming geometry. In Maya, use the RenderMan > Primvars > Freeze menu to add them to the selected geometry.__WPref
and __WNref
primvars. In Maya, use the RenderMan > Primvars > Freeze menu to add them to the selected geometry.Occlusion frontOnly
Restricts the projection to the points facing the projection direction.
This setting will update the resultMask output so you may use it to mix between the projection and the underlying surface material. |
Front Falloff
Introduces a smooth transition when using frontOnly. Useful to blend transitions between different projections. The default, 0.0, means no falloff.
This setting will update the resultMask output so you may use it to mix between the projection and the underlying surface material. |
Trace Occlusion
Shoots rays to avoid projecting on areas that are occluded by geometry, from the projections point of view.
This setting will update the resultMask output so you may use it to mix between the projection and the underlying surface material. |
Trace Max Distance
When traceOcclusion is on, you can limit the ray length. This number is expressed in scene units, whatever it may be in your authoring package.
This setting will update the resultMask output so you may use it to mix between the projection and the underlying surface material. |
Trace Set
The name of a trace set to restrict ray hits to a specific group of objects. The default is to consider all objects in the scene.
Horizontal Resolution
The horizontal image resolution. This is used to specify your image's original resolution, prior to txmake-ing.
Vertical resolution
The vertical image resolution. This is used to specify your image's original resolution, prior to txmake-ing.
Focal Length
The focal length of the camera is in millimeters (mm). To convert the Field of View (fov) to the Focal Length, use this
fov = atan((0.5 * aperture) / (focalLength * 0.0393701)) |
Horizontal Aperture
Vertical Aperture
Near Clip Plane
This setting will update the resultMask output so you may use it to mix between the projection and the underlying surface material. |
Far Clip Plane
This setting will update the resultMask output so you may use it to mix between the projection and the underlying surface material. |
Film Fit
This setting will update the resultMask output so you may use it to mix between the projection and the underlying surface material. |
Clamp To
This setting will update the resultMask output so you may use it to mix between the projection and the underlying surface material. |
Clamp To
Clamp the planar projection, assuming the coordinate system is represented as a cube.
CoordSys Type
There are 2 different types to match different viewport representations.
Angle
Scale S
Scale T
Offset S
Offset T
Invert T
Verbose
Front Only Tolerance
This parameter is sometime useful to avoid projecting on surfaces that are close to the grazing angle.
result
resultS
resultT
resultMask