Attribute Computations

Builtin computations for computing information about attributes. More...

Collaboration diagram for Attribute Computations:

Variables
const TfToken	computeValue
	Computes the provider attribute's value.
const TfToken	computeResolvedValue
	Computes the provider attribute's resolved value as authored in scene description.
const TfToken	computePath
	Computes the provider's scene path.

Detailed Description

Builtin computations for computing information about attributes.

Variable Documentation

computePath

const TfToken computePath

Computes the provider's scene path.

Returns

the path of the provider object, as an SdfPath.

Example

self.PrimComputation(_tokens->pathAsString)
    .Callback<std::string>(+[](const VdfContext &ctx) {
        return ctx.GetInputValue<SdfPath>(
            ExecBuiltinComputations->computePath).GetString();
    })
    .Inputs(
        Computation(ExecBuiltinComputations->computePath)
    );

Definition at line 146 of file builtinComputations.h.

computeResolvedValue

const TfToken computeResolvedValue

Computes the provider attribute's resolved value as authored in scene description.

This computation always produces the resolved value of an attribute, even if an attribute has registered an attribute expression.

Returns

a value whose type is the provider attribute's scalar value type.

Example

self.PrimComputation(_tokens->myComputation)
    .Callback<double>(&_MyCallback)
    .Inputs(
        Attribute(_tokens->myAttribute)
            .Computation(ExecBuiltinComputations->computeResolvedValue)
    );

Definition at line 126 of file builtinComputations.h.

computeValue

const TfToken computeValue

Computes the provider attribute's value.

Returns

a value whose type is the provider attribute's scalar value type. If the attribute has registered an attribute expression, this may produce a value of any type.

Note

The computation provider must be an attribute.

Example

self.PrimComputation(_tokens->myComputation)
    .Callback<double>(&_MyCallback)
    .Inputs(
        Attribute(_tokens->myAttribute)
            .Computation<double>(ExecBuiltinComputations->computeValue)
            .Required()
    );

Definition at line 102 of file builtinComputations.h.