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C++ Game Animation Programming

You're reading from   C++ Game Animation Programming Learn modern animation techniques from theory to implementation using C++, OpenGL, and Vulkan

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Product type Paperback
Published in Dec 2023
Publisher Packt
ISBN-13 9781803246529
Length 480 pages
Edition 2nd Edition
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Authors (2):
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Gabor Szauer Gabor Szauer
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Gabor Szauer
Michael Dunsky Michael Dunsky
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Michael Dunsky
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Toc

Table of Contents (22) Chapters Close

Preface 1. Part 1:Building a Graphics Renderer
2. Chapter 1: Creating the Game Window FREE CHAPTER 3. Chapter 2: Building an OpenGL 4 Renderer 4. Chapter 3: Building a Vulkan Renderer 5. Chapter 4: Working with Shaders 6. Chapter 5: Adding Dear ImGui to Show Valuable Information 7. Part 2: Mathematics Roundup
8. Chapter 6: Understanding Vector and Matrix 9. Chapter 7: A Primer on Quaternions and Splines 10. Part 3: Working with Models and Animations
11. Chapter 8: Loading Models in the glTF Format 12. Chapter 9: The Model Skeleton and Skin 13. Chapter 10: About Poses, Frames, and Clips 14. Chapter 11: Blending between Animations 15. Part 4: Advancing Your Code to the Next Level
16. Chapter 12: Cleaning Up the User Interface 17. Chapter 13: Implementing Inverse Kinematics 18. Chapter 14: Creating Instanced Crowds 19. Chapter 15: Measuring Performance and Optimizing the Code 20. Index 21. Other Books You May Enjoy

Crossfading animations

While the default animation blending uses the binding position with the joint weights as the starting point, crossfading interpolates between two animation clips. We could use the same animation clip as both the source and destination, but this would just play the animation, regardless of the position of the crossfading slider.

We will enhance the GltfModel class to store the values for two animation clips, instead of only the binding pose and one animation clip. For the renderer, new shared variables are needed, containing the second clip name and the percentage of blending between the two clips. The user interface must also reflect the new blending mode and new controls, like the selected destination clip, or a slider to adjust the percentage of the blending between the two clips. As the first step, we’ll update the model class.

Upgrading the model classes

To set the starting point of the glTF model to an animation, we will abuse the default...

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