Plane in hessian form. Plane represents a normalized plane equation. Basically, "normal" is the normal of the plane (a,b,c normalized), and "d" is the distance from the origin to the plane (in the direction of "normal"). "Over" or "Above" the plane is considered the side of the plane towards where the normal is pointing. $DOCS_URL/tutorials/math/index.html Constructs a default-initialized [Plane] with all components set to [code]0[/code]. Constructs a [Plane] as a copy of the given [Plane]. Creates a plane from the four parameters. The three components of the resulting plane's [member normal] are [param a], [param b] and [param c], and the plane has a distance of [param d] from the origin. Creates a plane from the normal vector. The plane will intersect the origin. Creates a plane from the normal vector and the plane's distance from the origin. Creates a plane from the normal vector and a point on the plane. Creates a plane from the three points, given in clockwise order. Returns the center of the plane. Returns the shortest distance from the plane to the position [param point]. If the point is above the plane, the distance will be positive. If below, the distance will be negative. Returns [code]true[/code] if [param point] is inside the plane. Comparison uses a custom minimum [param tolerance] threshold. Returns the intersection point of the three planes [param b], [param c] and this plane. If no intersection is found, [code]null[/code] is returned. Returns the intersection point of a ray consisting of the position [param from] and the direction normal [param dir] with this plane. If no intersection is found, [code]null[/code] is returned. Returns the intersection point of a segment from position [param from] to position [param to] with this plane. If no intersection is found, [code]null[/code] is returned. Returns [code]true[/code] if this plane and [param to_plane] are approximately equal, by running [method @GlobalScope.is_equal_approx] on each component. Returns [code]true[/code] if [param point] is located above the plane. Returns a copy of the plane, normalized. Returns the orthogonal projection of [param point] into a point in the plane. The distance from the origin to the plane, in the direction of [member normal]. This value is typically non-negative. In the scalar equation of the plane [code]ax + by + cz = d[/code], this is [code]d[/code], while the [code](a, b, c)[/code] coordinates are represented by the [member normal] property. The normal of the plane, which must be normalized. In the scalar equation of the plane [code]ax + by + cz = d[/code], this is the vector [code](a, b, c)[/code], where [code]d[/code] is the [member d] property. The X component of the plane's [member normal] vector. The Y component of the plane's [member normal] vector. The Z component of the plane's [member normal] vector. A plane that extends in the Y and Z axes (normal vector points +X). A plane that extends in the X and Z axes (normal vector points +Y). A plane that extends in the X and Y axes (normal vector points +Z). Returns [code]true[/code] if the planes are not equal. [b]Note:[/b] Due to floating-point precision errors, consider using [method is_equal_approx] instead, which is more reliable. Inversely transforms (multiplies) the [Plane] by the given [Transform3D] transformation matrix. Returns [code]true[/code] if the planes are exactly equal. [b]Note:[/b] Due to floating-point precision errors, consider using [method is_equal_approx] instead, which is more reliable. Returns the same value as if the [code]+[/code] was not there. Unary [code]+[/code] does nothing, but sometimes it can make your code more readable. Returns the negative value of the [Plane]. This is the same as writing [code]Plane(-p.normal, -p.d)[/code]. This operation flips the direction of the normal vector and also flips the distance value, resulting in a Plane that is in the same place, but facing the opposite direction.