Vector2

Two component vector class modeled after the XNA Game Studio math library.

Header

#include <SimpleMath.h>

Initialization

using namespace DirectX::SimpleMath;

Vector2 v;        // Creates a vector [0, 0]
Vector2 v(10);    // Creates a vector [10, 10]
Vector2 v(1, 2);  // Creates a vector [1, 2]

float arr[2] = { 1, 2 };
Vector2 v(arr);   // Creates a vector [1, 2]

Fields

• x component of vector
• y component of vector

Methods

• Comparison operators: == and !=

• Assignment operators: =, +=, -=, *=, /=

• Unary operators: +, -

• Binary operators: +, -, *, /

• InBounds: Tests if the vector is within the bounds set by the positive and negative of the input bounds.

• Length, LengthSquared: Compute vector length

• Dot

• Cross

• Normalize

• Clamp

Statics

• Distance, DistanceSquared: Compute distance between two vectors

• Min, * Max: Determine minimum/maximum vector elements

• Lerp: Performs a linear interpolation

• SmoothStep: Performs a cube interpolation

• Barycentric: Returns a point in Barycentric coordinates

• CatmullRom: Performs a Catmull-Rom interpolation

• Hermite: Performs a Hermite spline interpolation

• Reflect: Reflects an incident vector across a normal vector

• Refract: Refracts an incident vector across a normal vector

• Transform

• TransformNormal: Transforms the vector by the rotation and scale in the matrix, ignoring translation (rows 2 & 3).

Constants

• Zero: Zero vector [0, 0]
• One: One vector [1, 1]
• UnitX: Unit X vector [1, 0]
• UnitY: Unit Y vector [0, 1]

Remark

Vector2 can freely convert to and from a XMFLOAT2 and XMVECTOR (the z and w components are lost)