QQuick3DGeometry Class

class CustomGeometry : public QQuick3DGeometry
{
    Q_OBJECT
    ... properties ...

public:
    CustomGeometry();

    void setProperty(...)
    {
        ...
        rebuildGeometry();
    }

private:
    void rebuildGeometry()
    {
        QByteArray vertices;
        QByteArray indices;
        fillGeometry(vertices, indices);
        setPrimitiveType(Lines);
        setVertexBuffer(vertices);
        setIndexBuffer(indices);
        setStride(sizeof(QVector3D));
        setBounds(...);
        addAttrubute(PositionSemantic, 0, F32Type);
    }
};

qmlRegisterType<CustomGeometry>("Example", 1, 0, "CustomGeometry");

import Example 1.0

Model {
    id: customModel
    geometry: CustomGeometry {
    }
}

Member Function Documentation

void QQuick3DGeometry::addAttribute(Attribute::Semantic semantic, int offset, Attribute::ComponentType componentType)

Adds vertex attribute description. Each attribute has a semantic, which specifies the usage of the attribute and the number of components it has, an offset from the beginning to the vertex to the attribute location inside a vertex and a componentType specifying the datatype and size of the attribute.

The semantic can be one of the following:

The component type can be one of the following:

void QQuick3DGeometry::addAttribute(const QQuick3DGeometry::Attribute &attribute)

Adds vertex attribute description. Each attribute has a semantic, which specifies the usage of the attribute and the number of components it has, an offset from the beginning to the vertex to the attribute location inside a vertex and a componentType specifying the datatype and size of the attribute.

QQuick3DGeometry::Attribute QQuick3DGeometry::attribute(int index) const

Returns an attribute at index

int QQuick3DGeometry::attributeCount() const

Returns the attribute count.

QVector3D QQuick3DGeometry::boundsMax() const

Returns the maximum bound coordinate.

QVector3D QQuick3DGeometry::boundsMin() const

Returns the minimum bound coordinate.

void QQuick3DGeometry::clear()

Clears previously set vertex- and index data as well as attributes.

QByteArray QQuick3DGeometry::indexBuffer() const

Returns the index buffer data.

QQuick3DGeometry::PrimitiveType QQuick3DGeometry::primitiveType() const

Returns the primitive type. The default is Triangles.

See also setPrimitiveType().

void QQuick3DGeometry::setBounds(const QVector3D &min, const QVector3D &max)

Sets the bounds of the geometry with min and max point.

void QQuick3DGeometry::setIndexData(const QByteArray &data)

Sets the index buffer data. If the index buffer is not set, the vertex buffer is used as is for the vertices.

void QQuick3DGeometry::setPrimitiveType(QQuick3DGeometry::PrimitiveType type)

Sets the primitive type.

See also primitiveType().

void QQuick3DGeometry::setStride(int stride)

Sets the byte stride of the vertex.

See also stride().

void QQuick3DGeometry::setVertexData(const QByteArray &data)

Sets the vertex buffer data. The buffer should hold all the vertex data packed in the array described by the attributes.

int QQuick3DGeometry::stride() const

Returns the byte stride of the vertex buffer.

See also setStride().

QByteArray QQuick3DGeometry::vertexBuffer() const

Returns the vertex buffer data.