Book Image

Godot 4 Game Development Cookbook

By : Jeff Johnson
5 (1)
Book Image

Godot 4 Game Development Cookbook

5 (1)
By: Jeff Johnson

Overview of this book

Want to transition from Godot 3 to 4? Look no further than the Godot 4 Game Development Cookbook. This comprehensive guide covers everything you need to become proficient with the latest GUI, GDscript 2.0, Vulkan 2D/3D rendering, shaders, audio, physics, TileSet/TileMap, importing, sound/music, animation, and multiplayer workflows. With its detailed recipes, the book leaves no stone unturned. The Godot 4 Cookbook begins by exploring the updated graphical user interface and helps you familiarize yourself with the new features of GDscript 2.0. Next, it delves into the efficient rendering of 2D and 3D graphics using the Vulkan renderer. As it guides you in navigating the new Godot 4 platform, the book offers an in-depth understanding of shaders, including the latest enhancements to the shader language. Moreover, it covers a range of other topics, including importing from Blender, working with audio, and demystifying the new Vulkan Renderer and the physics additions for 2D and 3D. The book also shows you how the new changes to TileSet and TileMap make 2D game development easy. Advanced topics such as importing in Godot 4, adding sound and music to games, making changes in the Animation editor, and including workflows for multiplayer in Godot 4 are covered in detail. By the end of this game development book, you’ll have gained a better understanding of Godot 4 and will be equipped with various powerful techniques to enhance your Godot game development efficiency.
Table of Contents (13 chapters)

Using Instance Uniforms with shaders

In this recipe, we will create two instance uniform variables—color and alphachannel—in a shader script. We see that the variables that we created can now be seen in Inspector and changed from there, not from the script.

Getting ready

For this recipe, click the + sign to the right of the CreationDialog scene we just completed to add a new scene. In the Scene tab, click 3D Scene. Click on Scene in the top-left corner next to Project, then select Save Scene As, and name it InstanceUniforms.

How to do it…

Let’s add MeshInstance3D with a PlaneMesh and then write a shader script with the two Instance Uniforms:

  1. Left-click on the Node3D node and then press the + sign in the Scene tab. In the Create New Node window, type mesh in the Search box and then select MeshInstance3D to create the node in the scene.
  2. In the Inspector, click on <empty> to the right of Mesh and select New PlaneMesh.
  3. Left...