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An infinite plane, as a normal and a constant.
Geometry
The surface a ray is stopped by, most often the ground. A plane here is not a piece of geometry and has no extent: it is the whole infinite surface, described the way the maths wants it. Every point p on the plane satisfies dot(normal, p) + constant == 0, which means the constant is the NEGATIVE of the distance from the origin along the normal. The defaults give the ground through the origin, and a constant of -2 raises that ground to y = 2. Plane is its own connector type, so it cannot be crossed with a ray or a Vector3 by mistake.
| Name | Type | What it does |
|---|---|---|
| normal | Vector3 | Which way the plane faces. Should be unit length. |
| constant | Float | How far the plane sits from the origin along the normal, NEGATED. For the default ground normal, -2 puts the plane at y = 2. |
Scenes you can open in the editor that teach this node.
An object that follows the mouse across a plane. The cursor ray is built in the graph and intersected with that plane, then an actor moves the object there on every tick.
geo/Actor code/CursorRay code/Plane code/RayPlaneIntersect
This page is generated from the engine, so it describes the release you can download. The same text is in the editor's Help panel next to the node itself.