ftp.nice.ch/pub/next/developer/resources/classes/misckit/MiscKit.1.10.0.s.gnutar.gz#/MiscKit/Temp/ColorMerge/MiscColorMerge/Vector.h

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/* -*- c -*- */

typedef struct _Vector2D
{
    double x;
    double y;
} Vector2D;

typedef struct _Vector3D
{
    double x;
    double y;
    double z;
} Vector3D;

typedef double Vector4D[4];

typedef double Matrix4D[4][4];
typedef double Matrix4x3[4][3];

Vector2D* InitVector2D (Vector2D *vec, double x, double y);
Vector2D* CopyVector2D (Vector2D *dest, const Vector2D *src);
Vector2D* AddVectors2D (Vector2D *dest, const Vector2D *vec1,
			const Vector2D *vec2);
Vector2D* SubVectors2D (Vector2D *dest, const Vector2D *vec1,
			const Vector2D *vec2);
Vector2D* MultScalar2D (Vector2D *dest, double d, const Vector2D *vec);
Vector2D* MultVectors2D (Vector2D *vec, const Vector2D *vec1,
			 const Vector2D *vec2);

Vector3D* InitVector3D (Vector3D *vec, double x, double y, double z);
Vector3D* CopyVector3D (Vector3D *dest, const Vector3D *src);
double Abs3D (const Vector3D *vec);
Vector3D* AddVectors3D (Vector3D *dest, const Vector3D *vec1,
			const Vector3D *vec2);
Vector3D* SubVectors3D (Vector3D *dest, const Vector3D *vec1,
			const Vector3D *vec2);
Vector3D* MultScalar3D (Vector3D *dest, double d, const Vector3D *vec);
Vector3D* MultVectors3D (Vector3D *vec, const Vector3D *vec1,
			 const Vector3D *vec2);
double DotProduct3D (const Vector3D *vec1, const Vector3D *vec2);
Vector3D* CrossProduct3D (Vector3D *vec, const Vector3D *vec1,
			  const Vector3D *vec2);
Vector3D* Unity3D (Vector3D *dest, const Vector3D *vec);

Matrix4D* InitMatrix4D (Matrix4D *mat);
Matrix4D* CopyMatrix4D (Matrix4D *dest, const Matrix4D *src);
Matrix4D* MultMatrix4D (Matrix4D *dest,
			const Matrix4D *mat1, const Matrix4D *mat2);
Vector3D* ApplyTransformation (Vector3D *dest,
			       const Matrix4D *mat, const Vector3D *vec);
Matrix4D* InitTranslationMatrix (Matrix4D *mat, double x, double y, double z);
Matrix4D* InitXRotationMatrix (Matrix4D *mat, double theta);
Matrix4D* InitYRotationMatrix (Matrix4D *mat, double theta);
Matrix4D* InitZRotationMatrix (Matrix4D *mat, double theta);

Matrix4x3* InitMatrix4x3 (Matrix4x3 *mat);
Matrix4x3* MakeMatrix4x3 (Matrix4x3 *dest,
			  const Vector3D *vec1, const Vector3D *vec2,
			  const Vector3D *vec3, const Vector3D *vec4);
Matrix4x3* CopyMatrix4x3 (Matrix4x3 *dest, const Matrix4x3 *src);
Matrix4x3* MultMatrix4x3 (Matrix4x3 *dest,
			  const Matrix4D *mat1, const Matrix4x3 *mat2);
Vector3D* MultVector4DMatrix4x3 (Vector3D *dest,
				 const Vector4D *vec, const Matrix4x3 *mat);

Vector3D* CatmullRom (Vector3D *dest,
		      const Vector3D *vec1, const Vector3D *vec2,
		      const Vector3D *vec3, const Vector3D *vec4,
		      double t);

These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.