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KelleyGrov

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From: Austria, Zeiselberg

Registered: 2020-09-13

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A simple C++ 3D vector prototype library

Filed under: , Electronic  Games ,  — Leave a comment        July 14, 2018                 Hello people.
I hope you are well.

In this article I would like to present you a simple C++ 3D vector library

This is just a prototype and I am sure you can find other better and more complete  alternatives .
So, .

We are just dealing here with a “Yet Another 3D Vector Library”

I created this library because I wanted to reuse some 3D vector operations in various OpenGL computer graphics exercise programs (from my M.
Sc.
studies).
Of course, I could use an already existing library.
However, I wanted also to understand how some basic 3D vector operations work.
So,  these  two reasons led me to create the library.
The operations the library contains are the following:  add two vectors.
subtract two vectors.
multiple a vector with a scalar value.
divide a vector with a scalar value.
normalize a vector.
calculate the cross product of two vectors.
calculate the inner product of two vectors.
calculate the length of a vector.
calculate the opposite of a vector.
These were the vector operations that I needed for my programs.
Now, let me show you the header of the library: #ifndef _VECTOR_3F_H_ #define _VECTOR_3F_H_  class Vector3f {     private:         float x, y.

Z;      public:         Vector3f();          Vector3f(const float x

const float y, const float z);          float getX() const;          float getY() const;          float getZ() const;          void setX(const float value);          void setY(const float value);          void setZ(const float value);          void setValues(const float x, const float y, const float z);          Vector3f operator + (const Vector3f & vector) const;          Vector3f operator - (const Vector3f & vector) const;          Vector3f operator * (const float scale) const;          Vector3f operator / (const float scale) const;          Vector3f crossProduct(const Vector3f & vector) const;          float innerProduct(const Vector3f & vector) const;          float length() const;          Vector3f operator - () const;          void opposite ();          Vector3f normalized() const;          void normalize(); };  #endif // _VECTOR_3F_H_ Here is the implementation of the library: #include <cmath>  #include "Vector3f.h"  Vector3f::Vector3f() : Vector3f(0, 0, 0) { }  Vector3f::Vector3f(const float x, const float y, const float z) {     setValues(x, y, z); }  float Vector3f::getX() const {     return x; }  float Vector3f::getY() const {     return y; }  float Vector3f::getZ() const {     return z; }  void Vector3f::setX(const float value) {     x = value; }  void Vector3f::setY(const float value) {     y = value; }  void Vector3f::setZ(const float value) {     z = value; }  void Vector3f::setValues(const float x, const float y, const float z) {     setX(x);     setY(y);     setZ(z); }  Vector3f Vector3f::operator + (const Vector3f & vector) const {     return Vector3f(x + vector.getX(), y + vector.getY(), z + vector.getZ()); }  Vector3f Vector3f::operator - (const Vector3f & vector) const {     return Vector3f(x - vector.getX().
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Tags: 3D vector, cross product, Euclidean distance, , inner product, library, normalize, , Pythagorean theorem, .

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