C++ (Cpp) vector::normalize Examples

Programming Language: C++ (Cpp)

Class/Type: vector

Method/Function: normalize

Examples at hotexamples.com: 2

Vector normalize is a function or method provided by several libraries in C++ that calculates the unit vector of a given vector. It can be used in various contexts where we need vectors of unit magnitude, such as in physics simulations, computer graphics, or machine learning algorithms.

Example 1: In a 2D game, a character has a velocity vector (vx, vy) that determines its movement. We want to limit the speed of the character to a fixed value, say 10 pixels per frame. We can normalize the velocity vector by dividing it by the magnitude of the vector and then multiply it by the maximum speed.

Code example using the GLM (OpenGL Mathematics) library:

#include 
#include 

// ...

glm::vec2 velocity {vx, vy};
float max_speed = 10.0f;
if (glm::length(velocity) > max_speed) {
  velocity = glm::normalize(velocity) * max_speed;
}

Example 2: In a machine learning algorithm that uses Euclidean distance to measure the similarity between data points, we want to normalize the features to have equal weight. We can divide each feature vector by its magnitude to obtain a vector of unit length.

Code example using the Eigen library:

#include 

// ...

Eigen::VectorXd features {f1, f2, f3};
double norm = features.norm();
if (norm != 0) {
  features.normalize();
}

Both GLM and Eigen are popular C++ libraries for mathematical operations, including vectors and matrices, and provide the normalize method for vectors.

C++ (Cpp) vector::normalize - 2 examples found. These are the top rated real world C++ (Cpp) examples of vector::normalize from package poedit extracted from open source projects. You can rate examples to help us improve the quality of examples.

Frequently Used Methods

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PB(30)

GetSize(3)

Add(2)

GetLength(2)

RemoveAll(1)

Normalize(1)

Normalise(1)

InsertAt(1)

HasEmptyArticle(1)

GetVertex(1)

GetUV(1)

GetSymbolName(1)

GetNameInSourceCode(1)

At(1)

GetMask(1)

GetInterpolatedNormal(1)

GetId(1)

GetFace(1)

GetData(1)

GetColor(1)

GetAddress(1)

Double(1)

CrossProduct(1)

SetLength(1)

Example #1

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File: vector.hpp Project: jaredhoberock/igloo

inline std::tuple<vector,vector,vector> orthonormal_basis(const vector& v)
{
    vector v1 = v.normalize();

    auto v2_and_v3 = basis(v1);

    return std::make_tuple(v1, std::get<0>(v2_and_v3), std::get<1>(v2_and_v3));
}

Example #2

Show file

File: triangle.cpp Project: woshilapin/centaurus

triangle::triangle(
    const point &p1,
    const point &p2,
    const point &p3,
    const vector &normal)
{
    this->vertices_ = std::vector<point>(3);
    this->vertices_[0] = p1;
    this->vertices_[1] = p2;
    this->vertices_[2] = p3;
    this->normal_ = normal.normalize();
    this->plan_offset_ = -(vector(p1)*this->normal_);
    this->set_basis(p1, p2, p3);
}