Geometry input

Parses JSON encoded geometry into geometry primitives.

Inputs

• json geometry

  • The JSON encoded string that defines the geometry to parse. This can be a single polyline or PolyMesh, or an array of them.
    • Defaults to a flat, 1000 unit square polyline ({"id":"emptyPolyLine","points":[[0,0,0],[1000,0,0],[1000,1000,0],[0,1000,0],[0,0,0]]}) — despite the emptyPolyLine id, this is real geometry, not an absence of it.

• geometry schema

  • An optional JSON schema to validate the incoming json geometry against. Leave this empty to parse the geometry without validating it.

Outputs

• geometry

  • Output geometry primitives.

• points

  • The list of points of the output primitives.

• points.x

  • The list of x values of the points of the output primitives.

• points.y

  • The list of y values of the points of the output primitives.

• points.z

  • The list of z values of the points of the output primitives.

Note(s)

• This node is how geometry authored outside of the graph gets into it — most graphs build every primitive they output, but a graph using this node instead reacts to whatever geometry it is given at compute time.

• When a Live Component is applied to a face in SketchUp, that face is converted to JSON and enters the graph through this node.

• The expected JSON format follows the polyline and PolyMesh definitions in the eidos-json-schema repository. Only those two primitive types are supported — a NURBS curve or NURBS surface cannot be parsed by this node.

• Only point and face data comes through. Materials and attributes are not carried in, so anything like that has to be applied inside the graph.

• Because json geometry is a plain string, geometry can be tested by pasting JSON directly into the input, without a host application supplying it.

• Unlike the geometry asset node, which references geometry uploaded to the graph ahead of time as an asset, this node receives its geometry each time the graph computes.

• A graph using this node should resolve sensibly when no geometry has been supplied to it — the default 1000 unit square polyline is what a graph sees before anything has been connected or applied.

• Other names for this node include: GeometryInput.