GeoUVProject

The GeoUVProject node modifies or creates texture coordinates on a mesh using a projection from a Camera or an Axis node. If the object already has UV coordinates, this node replaces them. This simple example shows a CheckerBoard material projected onto a bunny using a Camera node to position the material.

Tip:  GeoUVProject's classic 3D system equivalent is the UVProject node.

Inputs and Controls

Connection Type

Connection Name

Function

Input

axis/cam

The Axis or Camera node controlling the projection attributes.

unnamed

The previous stage in the scene you want to affect.

Control (UI)

Knob (Scripting)

Default Value

Function

GeoUVProject

Mask

mask_patterns

{lastmodified}

Specifies the mask pattern to match the prim names to affect. The default mask, {lastmodified}, applies the effect to whatever was changed by the previous node. A simple way to think of it is that {lastmodified} affects the node above. You can use standard glob-style variables, such as /*, to create masks or use individual prim names separated by spaces. For example, /GeoCube 1 /GeoCard3 applies the effect to only those prims.

Tip:  You can also use the cog menu, the Viewer picker, or drag and drop paths from the Scene Graph to create masks.

Projection

projection

Perspective

Sets the projection type for rendered objects. Usually, it’s best to select a type that’s close to the object’s surface shape.

• Off

• Perspective

• Planar

• Spherical

• Cylindrical

Note:  When Projection is set to off, the GeoUVProject node is essentially disabled.

Plane

plane

XY

Sets the projection direction to project the texture image along axes:

• XY

• YZ

• ZX

Note:  This dropdown menu is only available if you selected planar as the projection type.

Project On

project_on

Both

Sets which surfaces of a 3D object the projection falls on through the camera:

• Both

• Front

• Back

View Frustum Culling

frustum_culling

off

When enabled, the GeoUVProject node affects only the vertices inside the camera view frustum. Any vertices outside the view frustum are not affected and they retain their original uv coordinates.

Invert U

u_invert

off

When enabled, the u coordinates are inverted on the horizontal axis.

Invert V

v_invert

off

When enabled, the v coordinates are inverted on the vertical axis.

U Scale

u_scale

1

Stretches or squashes the texture on the horizontal axis.

V Scale

v_scale

1

Stretches or squashes the texture on the vertical axis.

Attribute Name

uv_attrib_name

primvars:st

Specifies the name of the attribute to use for the UV coordinates of the upstream geometry. If your geometry has more than one set of UV coordinates, you can choose the attribute that suits the projection type.

Generate Perspective

generate_w

off

When enabled, GeoUVProject generates an stw attribute that adds a perspective component w to the UV coordinates.

W Attribute Name

uvw_attrib_name

primvars:stw

When Generate Perspective is enabled, W Attribute Name specifies the name of the attribute to use for the perspective UV coordinates of the upstream geometry. If your geometry has more than one set of UV coordinates, you can choose the attribute that suits the projection type.

Reference Frame
Use Reference Frame use_reference_frame   If on the projection will be applied at the reference frame only.
Reference Frame reference_frame   The reference frame for the projection. The projection is performed at this frame and the UVs will be used for all other frames. This allows a projection to be stuck to a changing geometry.
Animation Menu animation_menu   Allows you to view animation keys and modify them.
Set to Current Frame set_to_current_frame   Set the reference frame to the current frame.