Book Image

Fearless Cross-Platform Development with Delphi

By : David Cornelius
Book Image

Fearless Cross-Platform Development with Delphi

By: David Cornelius

Overview of this book

Delphi is a strongly typed, event-driven programming language with a rich ecosystem of frameworks and support tools. It comes with an extensive set of web and database libraries for rapid application development on desktop, mobile, and internet-enabled devices. This book will help you keep up with the latest IDE features and provide a sound foundation of project management and recent language enhancements to take your productivity to the next level. You’ll discover how simple it is to support popular mobile device features such as sensors, cameras, and GPS. The book will help you feel comfortable working with FireMonkey and styles and incorporating 3D user interfaces in new ways. As you advance, you’ll be able to build cross-platform solutions that not only look native but also take advantage of a wide array of device capabilities. You’ll also learn how to use embedded databases, such as SQLite and InterBase ToGo, synchronizing them with your own custom backend servers or modules using the powerful RAD Server engine. The book concludes by sharing tips for testing and deploying your end-to-end application suite for a smooth user experience. By the end of this book, you’ll be able to deliver modern enterprise applications using Delphi confidently.
Table of Contents (22 chapters)
1
Section 1: Programming Power
5
Section 2: Cross-Platform Power
11
Section 3: Mobile Power
15
Section 4: Server Power

Changing the camera

Every 3D view (TForm3D or TViewPort3D) has the concept of a camera to capture objects in the 3D world. The default camera used at design time points at the very center of the area but is located back from the screen, toward the viewer (-20 on the z axis). This gives a nice, viewable area of your 3D world.

But this is just the start—there can be several cameras.

Multiple cameras

You can add one or more cameras and switch between them and the default one. Their position and rotation can be customized to the specific views you're after, and if you want one of them to focus on one object, you can set the Target property to that object. Any change to a camera view at runtime requires a call to the camera's Repaint method to tell the output about the updated camera view.

Here are the steps to add a camera view that focuses on the elk—and how to switch it at runtime:

  1. Add a TCamera component to the form and set its Position properties...