Plane
7/14/25About 1 min
Plane
Representation of a plane in 3D space.
See Unity Plane for more info.
Members
Properties
| Name | Description |
|---|---|
Plane.distance | Distance from the origin to the plane. |
Plane.flipped | Returns a copy of the plane that faces in the opposite direction. (Read only) |
Plane.normal | Normal vector of the plane. |
Constructor
| Name | Description |
|---|---|
[Plane(inNormal, inPoint)](./Plane Constructor 1.md) | Creates a plane. |
[Plane(inNormal, d)](./Plane Constructor 2.md) | Creates a plane. |
[Plane(a, b, c)](./Plane Constructor 3.md) | Creates a plane. |
Methods
| Name | Description |
|---|---|
Plane.ClosestPointOnPlane(point) | For a given point returns the closest point on the plane. |
Plane.Flip() | Makes the plane face in the opposite direction. |
Plane.GetDistanceToPoint(point) | Returns a signed distance from plane to point. |
Plane.GetSide(point) | Is a point on the positive side of the plane? |
Plane.Raycast(ray) | Intersects a ray with the plane. |
Plane.SameSide(point0, point1) | Are two points on the same side of the plane? |
Plane.Set3Points(a, b, c) | Sets a plane using three points that lie within it. The points go around clockwise as you look down on the top surface of the plane. |
Plane.SetNormalAndPosition(inNormal, inPoint) | Sets a plane using a point that lies within it along with a normal to orient it. Note that the normal must be a normalised vector. |
Plane.Translate(translation) | Moves the plane in space by the translation vector. |
Static Methods
| Name | Description |
|---|---|
Plane.Translate(plane, translation) | Returns a copy of the given plane that is moved in space by the given translation. |
Extra Detail
A plane is an infinitely large, flat surface that exists in 3D space and divides the space into two halves known as half-spaces. It is easy to determine which of the two half-spaces a particular point is in and also how far the point is from the plane. Walls, floors and other flat surfaces are common in games, so a plane is sometimes useful for mathematical calculations with these objects. Also, there are cases where a real surface does not exist but it is useful to imagine that one is there. For example, in sports, a goal line or out-of-bounds line is often assumed to extend into the air, effectively defining a plane.