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usd_addtransform

Since17.5

int  usd_addtransform(int stagehandle, string primpath, string suffix, matrix xform)

This function applies a transformation to the primitive. It creates and sets a value of a transform operation attribute that defines the transformation, and appends it to the primitive’s transform order.

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.

suffix

The transform operation suffix.

USD primitives are transformed in space by a series of transform operations whose full names are sequentially listed in the xformOpOrder attribute. Full names are namespaced, encode the operation transform type (e.g., translation or rotation), and can also contain a suffix. If primitive has a few operations of the same type, it’s necessary to specify the suffix to differentiate between them. This parameter specifies such a suffix.

xform

The the matrix that encodes the space transformation.

Returns

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

Examples

examples

// Transform the cube.
#include <math.h>
matrix xform = maketransform(XFORM_SRT, XFORM_XYZ, {1,2,3}, {3,45,60}, {0.5,0.25,2});
usd_addtransform(0, "/geo/cube", "my_xform", xform);
// Get the cube's world transform.
matrix xform = usd_worldtransform(0, "/src/cube");


// Match the cone's spacial location to the cube.
// First need to clear current transforms on the cube,
// and also need to block the transform inheritance from the parent.
usd_cleartransformorder(0, "/dst/cone");
usd_settransformreset(0, "/dst/cone", 1);
usd_addtransform(0, "/dst/cone", "", xform);