Book Image

C++ Game Animation Programming - Second Edition

By : Michael Dunsky, Gabor Szauer
4.5 (2)
Book Image

C++ Game Animation Programming - Second Edition

4.5 (2)
By: Michael Dunsky, Gabor Szauer

Overview of this book

If you‘re fascinated by the complexities of animating video game characters and are curious about the transformation of model files into 3D avatars and NPCs that can explore virtual worlds, then this book is for you. In this new edition, you’ll learn everything you need to know about game animation, from a simple graphical window to a large crowd of smoothly animated characters. First, you’ll learn how to use modern high-performance graphics, dig into the details of how virtual characters are stored, and load the models and animations into a minimalistic game-like application. Then, you’ll get an overview of the components of an animation system, how to play the animations and combine them, and how to blend from one animation into another. You’ll also get an introduction to topics that will make your programming life easier, such as debugging your code or stripping down the graphical output. By the end of this book, you’ll have gained deep insights into all the parts of game animation programming and how they work together, revealing the magic that brings life to the virtual worlds on your screen.
Table of Contents (22 chapters)
1
Part 1:Building a Graphics Renderer
7
Part 2: Mathematics Roundup
10
Part 3: Working with Models and Animations
15
Part 4: Advancing Your Code to the Next Level

Switching shaders at runtime

In a real 3D renderer, you will need a lot of shader switches. The final picture is often created in many consecutive rendering steps, and the drawing operations need to reflect the tasks to be done in that single step. The vertex data sent to the GPU may be the same among many of the shaders, as changes in the data structures would require expensive transformations or lead to duplicate data storage with another set of attributes. But in many cases, the rest of the shader code itself will be completely different, depending on the input to that shader and the expected output.

Adding new shaders is done in only a couple of steps for the OpenGL renderer, so we will walk through the changes here. The Vulkan renderer needs different adjustments, and we will only check the broad steps.

The full example code can be found in the chapter04 | 01_opengl_shader_switch folder.

Creating a new set of shaders

The first step is to have multiple shaders available...