public Matrix4x4[] ComputeInstanceMatrices(Scene scene, string primPath)
{
var prim = scene.GetPrimAtPath(primPath);
var pi = new pxr.UsdGeomPointInstancer(prim);
var xforms = new pxr.VtMatrix4dArray();
pi.ComputeInstanceTransformsAtTime(xforms, scene.Time == null ? pxr.UsdTimeCode.Default() : scene.Time, 0);
// Slow, but works.
var matrices = new Matrix4x4[xforms.size()];
for (int i = 0; i < xforms.size(); i++)
{
matrices[i] = UnityTypeConverter.FromMatrix(xforms[i]);
}
return(matrices);
}
/// <summary>
/// Registers Unity-specifc data type conversions in the global type binder (UsdIo.Bindings).
/// </summary>
static public void RegisterTypes()
{
if (isInitialized)
{
return;
}
isInitialized = true;
TypeBinder binder = USD.NET.UsdIo.Bindings;
//
// Quaternion
//
binder.BindType(typeof(Quaternion), new UsdTypeBinding(
(object obj) => UnityTypeConverter.QuaternionToQuatf((Quaternion)obj),
(pxr.VtValue value) => UnityTypeConverter.QuatfToQuaternion(value),
SdfValueTypeNames.Quatf));
binder.BindArrayType <UnityTypeConverter>(typeof(Quaternion[]), typeof(pxr.VtQuatfArray), SdfValueTypeNames.QuatfArray);
binder.BindArrayType <UnityTypeConverter>(typeof(List <Quaternion>), typeof(pxr.VtQuatfArray), SdfValueTypeNames.QuatfArray, "List");
//
// Scalar Vector{2,3,4}
//
binder.BindType(typeof(Vector2), new UsdTypeBinding(
(object obj) => UnityTypeConverter.Vector2ToVec2f((Vector2)obj),
(pxr.VtValue value) => UnityTypeConverter.Vec2fToVector2(value),
SdfValueTypeNames.Float2));
binder.BindType(typeof(Vector3), new UsdTypeBinding(
(object obj) => UnityTypeConverter.Vector3ToVec3f((Vector3)obj),
(pxr.VtValue value) => UnityTypeConverter.Vec3fToVector3(value),
SdfValueTypeNames.Float3));
binder.BindType(typeof(Vector4), new UsdTypeBinding(
(object obj) => UnityTypeConverter.Vector4ToVec4f((Vector4)obj),
(pxr.VtValue value) => UnityTypeConverter.Vec4fToVector4(value),
SdfValueTypeNames.Float4));
//
// Scaler Rect <-> GfVec4f
//
binder.BindType(typeof(Rect), new UsdTypeBinding(
(object obj) => UnityTypeConverter.RectToVtVec4((Rect)obj),
(pxr.VtValue value) => UnityTypeConverter.Vec4fToRect(value),
SdfValueTypeNames.Float4));
//
// Vector {2,3,4} {[],List<>}
//
binder.BindArrayType <UnityTypeConverter>(typeof(Vector2[]), typeof(pxr.VtVec2fArray), SdfValueTypeNames.Float2Array);
binder.BindArrayType <UnityTypeConverter>(typeof(List <Vector2>), typeof(pxr.VtVec2fArray), SdfValueTypeNames.Float2Array, "List");
binder.BindArrayType <UnityTypeConverter>(typeof(Vector3[]), typeof(pxr.VtVec3fArray), SdfValueTypeNames.Float3Array);
binder.BindArrayType <UnityTypeConverter>(typeof(List <Vector3>), typeof(pxr.VtVec3fArray), SdfValueTypeNames.Float3Array, "List");
binder.BindArrayType <UnityTypeConverter>(typeof(Vector4[]), typeof(pxr.VtVec4fArray), SdfValueTypeNames.Float4Array);
binder.BindArrayType <UnityTypeConverter>(typeof(List <Vector4>), typeof(pxr.VtVec4fArray), SdfValueTypeNames.Float4Array, "List");
//
// Color / Color32
//
binder.BindType(typeof(Color[]), new UsdTypeBinding(
(object obj) => UnityTypeConverter.ToVtArray(((Color[])obj)),
(pxr.VtValue vtVal) => UnityTypeConverter.ColorFromVtArray(vtVal),
SdfValueTypeNames.Color4fArray));
binder.BindType(typeof(Color), new UsdTypeBinding(
(object obj) => UnityTypeConverter.ColorToVec4f(((Color)obj)),
(pxr.VtValue vtVal) => UnityTypeConverter.Vec4fToColor(vtVal),
SdfValueTypeNames.Color4f));
binder.BindType(typeof(Color32), new UsdTypeBinding(
(object obj) => UnityTypeConverter.Color32ToVec4f(((Color32)obj)),
(pxr.VtValue vtVal) => UnityTypeConverter.Vec4fToColor32(vtVal),
SdfValueTypeNames.Color4f));
binder.BindType(typeof(Bounds), new UsdTypeBinding(
(object obj) => UnityTypeConverter.BoundsToVtArray(((Bounds)obj)),
(pxr.VtValue vtVal) => UnityTypeConverter.BoundsFromVtArray(vtVal),
SdfValueTypeNames.Float3Array));
binder.BindArrayType <UnityTypeConverter>(typeof(List <Color>), typeof(pxr.VtVec4fArray), SdfValueTypeNames.Color4fArray);
binder.BindArrayType <UnityTypeConverter>(typeof(Color32[]), typeof(pxr.VtVec4fArray), SdfValueTypeNames.Color4fArray);
//
// Matrix4x4
//
// Note that UsdGeom exclusively uses double-precision matrices for storage.
// In the future, it may be nice to support single-precision for clients who aren't targeting
// UsdGeom.
binder.BindType(typeof(Matrix4x4), new UsdTypeBinding(
(object obj) => UnityTypeConverter.ToGfMatrix(((Matrix4x4)obj)),
(pxr.VtValue vtVal) => UnityTypeConverter.FromMatrix((pxr.GfMatrix4d)vtVal),
SdfValueTypeNames.Matrix4d));
binder.BindArrayType <UnityTypeConverter>(typeof(Matrix4x4[]), typeof(pxr.VtMatrix4dArray), SdfValueTypeNames.Matrix4dArray);
binder.BindArrayType <UnityTypeConverter>(typeof(List <Matrix4x4>), typeof(pxr.VtMatrix4dArray), SdfValueTypeNames.Matrix4dArray, "List");
}