sourceforge project page - rule-based mesh growing

Introduction

Vecmath is a comprehensive library for vector arithmetics. Its written in C# and its main focus is on computer graphics applications.

Quickstart

All types are named using the following scheme: Name<dim><type>

	2-dimensional				3-dimensional
	double	float	long	int	double	float	long	int
point	Pnt2D	Pnt2F			Pnt3D	Pnt3F
vector	Vec2D	Vec2F	Vec2L	Vec2I	Vec3D	Vec3F
ray	Ray2D	Ray2F			Ray3D	Ray3F
box	Box2D	Box2F			Box3D	Box3F
translation	Shift2D	Shift2F			Shift3D	Shift3F
scale	Scale2D	Scale2F			Scale3D	Scale3F
rotation	Rot2D	Rot2F			Rot3D	Rot3F
general transformation	Trafo2D	Trafo2F			Trafo3D	Trafo3F

Example: A 2-dim point at coordinates p(10,17) should be rotated 90 degrees ccw, with the center of rotation at coordinates c(7,3).

Pnt2D p = new Pnt2D(10, 17);
Pnt2D c = new Pnt2D(7,3);
Trafo2D transform =
      new Shift2D(-c)            // shift center of rotation to origin
    * new Rot2D(Math.PI / 2.0)   // rotate
    * new Shift2D(c)             // shift back
    ;

Pnt2D p_transformed = p * transform;

System.Console.WriteLine("p: " + p);
System.Console.WriteLine("c: " + c);
System.Console.WriteLine("result: " + p_transformed);

Output:
p: Pnt2D(10, 17)
c: Pnt2D(7, 3)
result: Pnt2D(-7, 6)