- Qt 6.8
- Qt Quick
- QML Types
- vector3d
- Qt 6.8.0 Reference Documentation

# vector3d QML Value Type

a value with x, y, and z attributes. More...

## Detailed Description

The `vector3d` type refers to a value with `x`, `y`, and `z` attributes.

Properties of type `vector3d` have a zero vector by default. This has `x`, `y` and `z` set to `0`.

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 |
     var a = Qt.vector3d(1,2,3);
     var b = Qt.vector3d(4,5,6);
     var c = a.crossProduct(b);
     console.log(c.toString()); // QVector3D(-3, 6, -3)
real dotProduct(vector3d other) | Returns the scalar real result of the dot product of `this` vector3d with the `other` vector3d |
     var a = Qt.vector3d(1,2,3);
     var b = Qt.vector3d(4,5,6);
     var c = a.dotProduct(b);
     console.log(c); // 32
vector3d times(matrix4x4 matrix) | Returns the vector3d result of transforming `this` vector3d with the 4x4 `matrix` with the matrix applied post-vector |
     var a = Qt.vector3d(1,2,3);
     var b = Qt.matrix4x4(4,5,6,7,8,9,10,11,
                          12,13,14,15,16,17,18,19);
     var c = a.times(b);
     console.log(c.toString());
     // QVector3D(0.774194, 0.849462, 0.924731)
vector3d times(vector3d other) | Returns the vector3d result of multiplying `this` vector3d with the `other` vector3d |
     var a = Qt.vector3d(1,2,3);
     var b = Qt.vector3d(4,5,6);
     var c = a.times(b);
     console.log(c.toString()); // QVector3D(4, 10, 18)
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 |
     var a = Qt.vector3d(1,2,3);
     var b = Qt.vector3d(4,5,6);
     var c = a.plus(b);
     console.log(c.toString()); // QVector3D(5, 7, 9)
vector3d minus(vector3d other) | Returns the vector3d result of the subtraction of `other` vector3d from `this` vector3d |
     var a = Qt.vector3d(1,2,3);
     var b = Qt.vector3d(4,5,6);
     var c = a.minus(b);
     console.log(c.toString()); // QVector3D(-3, -3, -3)
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. |
     var a = Qt.vector3d(1,2,3);
     var b = Qt.vector3d(1.0001, 1.9998, 2.0001);
     var c = a.fuzzyEquals(b);        // default epsilon
     var d = a.fuzzyEquals(b, 0.005); // supplied epsilon
     console.log(c + " " + d); // false true

This value type is provided by the QtQuick import.

See also QML Value Types.