QVector3D vector(1.0f, 2.0f, 3.0f); // create a new vector vector.setY(4.0f); // set the y value to 4.0
QVector3D vector1(1.0f, 2.0f, 3.0f); // create first vector QVector3D vector2(4.0f, 5.0f, 6.0f); // create second vector float midY = (vector1.y() + vector2.y()) / 2.0f; // calculate the midpoint of the y values QVector3D midPoint((vector1.x() + vector2.x()) / 2.0f, midY, (vector1.z() + vector2.z()) / 2.0f); // create the midpoint vector midPoint.setY(3.0f); // set the y value to 3.0In this example, two QVector3D objects are created with different values for x, y, and z. The y values of each vector are then added together and divided by 2.0 to find the midpoint of the two vectors. A new QVector3D object is created with the midpoint value for y and the original x and z values. The setY method is then called to change the midpoint vector's y value to 3.0. This example demonstrates how the setY method can be used along with other methods in the QVector3D class to perform mathematical calculations on 3D vectors. Package library: Qt.