PI-Math

A C++ header-only math library designed for Graphics. It is still under construction. And not recommend to use it now.

How to use

Please include the file pimath.h into your project and use namespace Pimath in order to use it. You could use the following statement to use the namespace

using namespace PIMATH_NAMESPACE_NAME;

Datatype:

There are mainly three datatypes now in PI-Math: Vector, Matrix and Quaternion. Vector is a sqecial case of Matrix (with only 1 row or colume). The data is stored colume-majored.

There is also a numeric type called real, which is a 32 bit float or 64 bit double number depending on whether or not the macro PM_64BIT is defined. There is also a literal value operator for real, for example:

real a = 3.14_f

Vector, Matrix are the same type: MatrixND<rows, cols, type, instruction set> You could use the predefined names for common data types. Vector[ndim][type]

For example, a 3 dimensional real vector is: Vector3 .A 2 dimensional float vector is: Vector2f.A 4 dimensional template type vector is: Vector4t<T>

4x4 Matrix could be: Matrix4x4 or Matrix4

Usage:

Vector:

A Vector can be initialized with following ways

Vector3 a; // all value 0
Vector3 b(1_f); // b = (1, 1, 1)
Vector3 c{ 1_f, 2_f, 3_f};  // c = (1,2,3)
Vector3 d(1_f, 2_f, 3_f);   // d = (1,2,3), this only works for vectors no longer than 4.

To access a member:

a[i];   // access the element with index i (starting from 0)
a.x, a.y, a.z, a.w;   // used for vectors no longer than 4.