Custom Wireframe component

The source code of FireMonkey is very helpful in understanding how the library works, but we can also use it as a template to build our own custom components. Rendering a cube is not a lot of code but using a similar approach, we could create a custom wireframe component that is similar to TStrokeCube. We can just implement the Render method differently and paint arbitrary lines, the coordinates of which are stored internally within our component.

Create a new Delphi multi-device application and select 3D Application as the application type. Save the main form unit as uFormWireframe and the whole project as WireframeTest. Rename the form as FormWireframe. Save all.

Add a new unit to the project and save it as uWireframe. Here we are going to implement a custom component called TWireframe that, similarly to TStrokeCube, inherits from the TControl3D class and renders an arbitrary wireframe by drawing lines.

Drawing a wireframe is based on just two data structures. We...