3.2 Objects — Throwcast Manual

+ Object asks which one first. It holds everything that stands in the venue without being a screen — five shapes, under Rigging the two truss sections and cable tray, and under Cut the cutter that opens doorways in them (§3.14).

The Add an object menu — Figure 3.2 The nine rows and the size each one arrives at. Truss and tray had buttons of their own until they moved in here: they are the same kind of answer as the shapes — a thing that stands in the venue and is tuned in the inspector afterwards. The cutter sits under a heading of its own because it is the one row that takes geometry away rather than adding it.

Table 3.1 What + Object offers.
Row	Is	Arrives as
Room	Floor and four walls, deliberately no ceiling	12 × 4 × 8 m
Box	A plinth, a riser, a flight case	1 m cube
Cone	A cone on its base	R 0.5 × 1 m
Cylinder	A solid column	R 0.5 × 1 m
Sphere	A globe	R 0.5 m
Box truss	Four chords in a square — the general-purpose stick	2 m · 290 mm
Triangle truss	Three chords, single chord on top — how truss hangs	2 m · 290 mm
Cable tray	One stretch to build a run from (§9)	3 m · 300 mm
Cutter	A body that dissolves what it overlaps — a doorway, a window, a bore (§3.14)	1 × 2.1 × 1 m

Where a row lands differs, and it is not arbitrary. A shape arrives at the origin, because a room is what every other position in the venue is measured from and it wants a known, repeatable spot. Truss and tray arrive under whatever you are looking at: they are rigged into a venue that already exists, and the point you are orbiting around is the one place on screen the app knows you mean.

A room has no ceiling on purpose: a closed box is something you cannot see into and cannot rig above. Open at the top, a normal orbit looks straight down into it and a rig hung over it lights in.

Every object is a projection target, an occluder and a measurable body from the moment it exists. Aim a projector at a box and the Metrics panel reads throw distance and image size off whichever face the beam lands on.