Содержание

DirectXTK	SimpleMath

An infinite 2D plane represented as a four component vector modeled after the XNA Game Studio 4 (Microsoft.Xna.Framework.Plane) math library.

Header

#include <SimpleMath.h>

Initialization

using namespace DirectX::SimpleMath;

Plane p;                      // Creates a plane in XZ at the origin
Plane p(0, 1, 0, 0);          // Creates a plane in XZ at the origin
Plane p( Vector3(0,1,0), 0 ); // Creates a plane in XZ at the origin
Plane p( Vector3(1,1,1),
         Vector3(2,2,2),
         Vector3(3,3,3));     // Creates a plane containing the three points
Plane p( Vector3(1,2,3),
         Vector3(0,0,1) );    // Creates a plane at [1,2,3] with the normal [0,0,1]

float arr[4] = { 0, 1, 0, 0 };
Plane p(arr);                 // Creates a plane in XZ at the origin

Fields

x component of the plane normal (A)
y component of the plane normal (B)
z component of the plane normal (D)
w scalar distance to the plane from the origin (D)

This is the Cartesian form of the equation of a plane: Ax + By + C*z + D

Properties

Normal: Returns the normal vector for the plane
D: Returns the distance to the plane

Methods

Comparison operators: == and !=
Assignment operators: =
Normalize
Dot: Performs a 4D dot product between a 4 vector and the plane
DotCoordinate: Performs a point test against the plane, which returns the distance between the point and the plane.
DotNormal: Performs a dot product against just the normal of the plane.