cube-game-plus-plus/client/math/Vector.cpp

#include <cmath>

#include "client/math/Vector.h"

Vector::Vector() : x(0), y(0), z(0) {
}

Vector::Vector(float ix, float iy, float iz) : x(ix), y(iy), z(iz) {
}

Vector::Vector(float lengthAngle, float widthAngle) {
    setAngles(lengthAngle, widthAngle);
}

float Vector::getX() const {
    return x;
}

float Vector::getY() const {
    return y;
}

float Vector::getZ() const {
    return z;
}

Vector& Vector::setX(float ix) {
    x = ix;
    return *this;
}

Vector& Vector::setY(float iy) {
    y = iy;
    return *this;
}

Vector& Vector::setZ(float iz) {
    z = iz;
    return *this;
}

Vector& Vector::set(const Vector& v) {
    return set(v.x, v.y, v.z);
}

Vector& Vector::set(float ix, float iy, float iz) {
    x = ix;
    y = iy;
    z = iz;
    return *this;
}

Vector& Vector::setInverse(const Vector& v) {
    x = -v.x;
    y = -v.y;
    z = -v.z;
    return *this;
}

Vector& Vector::setMul(const Vector& v, float f) {
    x = v.x * f;
    y = v.y * f;
    z = v.z * f;
    return *this;
}

Vector& Vector::setAngles(float lengthAngle, float widthAngle) {
    lengthAngle = lengthAngle * (M_PI / 180.0f);
    widthAngle = widthAngle * (M_PI / 180.0f);
    x = cosf(widthAngle) * sinf(lengthAngle);
    y = sinf(widthAngle);
    z = cosf(widthAngle) * cosf(lengthAngle);
    return *this;
}

Vector& Vector::add(const Vector& v) {
    x += v.x;
    y += v.y;
    z += v.z;
    return *this;
}

Vector& Vector::sub(const Vector& v) {
    x -= v.x;
    y -= v.y;
    z -= v.z;
    return *this;
}

Vector& Vector::mul(float f) {
    x *= f;
    y *= f;
    z *= f;
    return *this;
}

Vector& Vector::mul(const Matrix& m) {
    const float* d = m.getValues();
    const float w = 1.0f;
    float nx = x * d[0] + y * d[4] + z * d[8] + w * d[12];
    float ny = x * d[1] + y * d[5] + z * d[9] + w * d[13];
    float nz = x * d[2] + y * d[6] + z * d[10] + w * d[14];
    float nw = x * d[3] + y * d[7] + z * d[11] + w * d[15];
    set(nx / nw, ny / nw, nz / nw);
    return *this;
}

Vector& Vector::addMul(const Vector& v, float f) {
    x += v.x * f;
    y += v.y * f;
    z += v.z * f;
    return *this;
}

Vector& Vector::cross(float ix, float iy, float iz) {
    return set(y * iz - z * iy, z * ix - x * iz, x * iy - y * ix);
}

Vector& Vector::cross(const Vector& v) {
    return set(y * v.z - z * v.y, z * v.x - x * v.z, x * v.y - y * v.x);
}

Vector& Vector::normalize() {
    float f = 1.0f / length();
    x *= f;
    y *= f;
    z *= f;
    return *this;
}

float Vector::squareLength() const {
    return x * x + y * y + z * z;
}

float Vector::length() const {
    return sqrtf(squareLength());
}

float Vector::dot(const Vector& v) const {
    return x * v.x + y * v.y + z * v.z;
}

float Vector::dotInverse(const Vector& v) const {
    return x * (-v.x) + y * (-v.y) + z * (-v.z);
}

void Vector::toString(String& s) const {
    s.append("(x = ").append(x).append(", y = ").append(y).append(", z = ").append(z).append(")");
}