Preparing a scaling matrix

The third transformation that can be performed on a 3D model is scaling. This allows us to change an object's size.

How to do it...

1. Prepare three variables of type float named x, y, and z that will hold the scaling factor applied to a model in x (width), y (height), and z (depth) dimensions, respectively.
2. Create a variable of type std::array<float, 16> named scaling_matrix, in which a matrix representing the desired operation will be stored. Initialize elements of the scaling_matrix array with the following values:
   • All elements initialize with a 0.0f value
   • 0th element with a value stored in the x variable
   • 5^th element with a value stored in the y variable
   • 10^th element with a value stored in the z variable
   • 15^th element with a...