usd_addprimvar

Since	18.0

int  usd_addprimvar(int stagehandle, string primpath, string name, string typename)

int  usd_addprimvar(int stagehandle, string primpath, string name, string typename, string interpolation)

This function adds a primvar of a given type to the primitive, if such primvar is not part of a schema. It is useful for controlling the exact type of a custom primvar. For primvars defined by primitive’s schema, this call has no effect, because the schema already determines their type.

stagehandle

A handle to the stage to write to. Currently the only valid value is 0, which means the current stage in a node. (This argument may be used in the future to allow writing to other stages.)

primpath

The path to the primitive.

name

Primvar name (without namespace).

typename

The name or an alias of the type.

interpolation

The name of the interpolation to be used for this primvar (e.g., “constant”, “vertex”, “faceVarying”, etc).

Returns

The value of stagehandle on success, or -1 on failure.

Examples

examples

// Adds a half-precision float primvar and sets its falue.
usd_addprimvar(0, "/geo/sphere", "half_primvar", "half3");
usd_setprimvar(0, "/geo/sphere", "half_primvar", {1.25, 1.50, 1.75});

// Adds a color primitive with 'vertex' interpolation.
usd_addprimvar(0, pp, "color_primvar", "color3d[]", "vertex");
usd_setprimvar(0, pp, "color_primvar",  vector[](array({1,0,0}, {0,1,0}, {0,0,1})));