# vector3d QML Basic Type

The `vector3d`

type refers to a value with `x`

, `y`

, and `z`

attributes.

To create a `vector3d`

value, specify it as a "x,y,z" string:

Rotation { angle: 60; axis: "0,1,0" }

or with the Qt.vector3d() function:

Rotation { angle: 60; axis: Qt.vector3d(0, 1, 0) }

or as separate `x`

, `y`

, and `z`

components:

Rotation { angle: 60; axis.x: 0; axis.y: 1; axis.z: 0 }

Each attribute of a vector3d value is stored internally as a single-precision floating point number (`float`

).

When integrating with C++, note that any QVector3D value passed into QML from C++ is automatically converted into a `vector3d`

value, and vice-versa.

The vector3d type has the following idempotent functions which can be invoked in QML:

Function Signature | Description | Example |
---|---|---|

vector3d crossProduct(vector3d other) | Returns the vector3d result of the cross product of `this` vector3d with the `other` vector3d | |

real dotProduct(vector3d other) | Returns the scalar real result of the dot product of `this` vector3d with the `other` vector3d | |

vector3d times(matrix4x4 matrix) | Returns the vector3d result of transforming `this` vector3d with the 4x4 `matrix` with the matrix applied post-vector | |

vector3d times(vector3d other) | Returns the vector3d result of multiplying `this` vector3d with the `other` vector3d | |

vector3d times(real factor) | Returns the vector3d result of multiplying `this` vector3d with the scalar `factor` | var a = Qt.vector3d(1,2,3); var b = 4.48; var c = a.times(b); console.log(c.toString()); // QVector3D(4.48, 8.96, 13.44) |

vector3d plus(vector3d other) | Returns the vector3d result of the addition of `this` vector3d with the `other` vector3d | |

vector3d minus(vector3d other) | Returns the vector3d result of the subtraction of `other` vector3d from `this` vector3d | |

vector3d normalized() | Returns the normalized form of `this` vector | var a = Qt.vector3d(1,2,3); var b = a.normalized(); console.log(b.toString()); // QVector3D(0.267261, 0.534522, 0.801784) |

real length() | Returns the scalar real value of the length of `this` vector3d | var a = Qt.vector3d(1,2,3); var b = a.length(); console.log(b.toString()); // 3.7416573867739413 |

vector2d toVector2d() | Returns the vector2d result of converting `this` vector3d to a vector2d | var a = Qt.vector3d(1,2,3); var b = a.toVector2d(); console.log(b.toString()); // QVector2D(1, 2) |

vector4d toVector4d() | Returns the vector4d result of converting `this` vector3d to a vector4d | var a = Qt.vector3d(1,2,3); var b = a.toVector4d(); console.log(b.toString()); // QVector4D(1, 2, 3, 0) |

bool fuzzyEquals(vector3d other, real epsilon) | Returns true if `this` vector3d is approximately equal to the `other` vector3d. The approximation will be true if each attribute of `this` is within `epsilon` of `other` . Note that `epsilon` is an optional argument, the default `epsilon` is 0.00001. |

This basic type is provided by the QtQuick import.

**See also **QML Basic Types.

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