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)

Loading and compiling shaders in OpenGL

In Chapter 2, Using Essential Libraries, our tiny OpenGL examples loaded all the GLSL shaders directly from the const char* variables defined inside our source code. While this approach is acceptable in the territory of 100-line demos, it does not scale well beyond that. In this recipe, we will learn how to load, compile, and link shaders and shader programs. This approach will be used throughout the rest of the examples in this book.

Getting ready

Before we can proceed with the actual shader loading, we need two graphics API-agnostic functions. The first one loads a text file as std::string:

std::string readShaderFile(const char* fileName) {
  FILE* file = fopen(fileName, "r");
  if (!file) {
     printf("I/O error. Cannot open '%s'\n", fileName);
     return std::string();
  fseek(file, 0L, SEEK_END);