Book Image

3D Graphics Rendering Cookbook

By : Sergey Kosarevsky, Viktor Latypov
4 (2)
Book Image

3D Graphics Rendering Cookbook

4 (2)
By: Sergey Kosarevsky, Viktor Latypov

Overview of this book

OpenGL is a popular cross-language, cross-platform application programming interface (API) used for rendering 2D and 3D graphics, while Vulkan is a low-overhead, cross-platform 3D graphics API that targets high-performance applications. 3D Graphics Rendering Cookbook helps you learn about modern graphics rendering algorithms and techniques using C++ programming along with OpenGL and Vulkan APIs. The book begins by setting up a development environment and takes you through the steps involved in building a 3D rendering engine with the help of basic, yet self-contained, recipes. Each recipe will enable you to incrementally add features to your codebase and show you how to integrate different 3D rendering techniques and algorithms into one large project. You'll also get to grips with core techniques such as physically based rendering, image-based rendering, and CPU/GPU geometry culling, to name a few. As you advance, you'll explore common techniques and solutions that will help you to work with large datasets for 2D and 3D rendering. Finally, you'll discover how to apply optimization techniques to build performant and feature-rich graphics applications. By the end of this 3D rendering book, you'll have gained an improved understanding of best practices used in modern graphics APIs and be able to create fast and versatile 3D rendering frameworks.
Table of Contents (12 chapters)

Adding camera animations and motion

Besides having a user-controlled free camera, it is convenient to be able to position and move the camera programmatically inside a 3D scene. In this recipe, we will show how to do this using a 3D camera framework from the Working with a 3D camera and basic user interaction recipe. We will draw a combo box using ImGui to select between two camera modes: a first-person free camera and a fixed camera moving to a user-specified point settable from the user interface.

Getting ready

The full source code for this recipe can be found in Chapter4/VK01_DemoApp. Implementations of camera-related functionality are located in shared/Camera.h.

How to do it...

Let's look at how to programmatically control our 3D camera using a simple ImGui-based user interface:

  1. First, we need to define the camera positioners attached to the camera – just a bunch of global variables:
    glm::vec3 cameraPos(0.0f, 0.0f, 0.0f);
    glm::vec3 cameraAngles(-45...