
Download the Godot engine from the official website or Steam and choose a 4.x stable or beta version. Unzip the package to begin; Steam handles updates.
Set up a Godot 4 scene with a full-screen paper canvas, left and right toolbars, and a color palette to enable coloring in the digital coloring book.
Set up the remaining variables at the top, including current page, current color, brush size, drawing state, UI reference region, and undo/redo stacks, plus a custom signal layers floated.
Learn input handling in Godot 4 to support a coloring book: manage flood fill and brush interactions, detect mouse events, and prevent drawing when the user interface is active.
Learn brush mode to color over line art by calculating coloring positions, applying brush strokes to a coloring layer, and handling start, continue, and stop coloring with input.
Set up utility functions to control color, brush size, and drawing mode, wire a color toolbar, and enable brush, bucket, and eraser tools with color selection and deferred calls.
Set up next page and previous page navigation, plus a clear page option, in Godot 4 for the digital coloring book, with bounds checks, page drawing, and connecting toolbar buttons.
Implement undo and redo for coloring app by managing undo and redo stacks, saving states on brush strokes and flood fill, and updating current page with each action.
Save coloring pages to a binary file in the user directory, using file access to write png buffers; load progress reads the file and rebuilds images from buffers.
Easily bring your creative ideas to life with Godot 4 by creating a complete digital coloring book app from scratch! This comprehensive course guides you step-by-step to build a fully functional, interactive coloring app, perfect for kids, hobby projects, or educational tools.
You’ll learn how to:
Set up a Godot 4 project and properly organize your scenes and nodes
Load and display line art images fully ready for coloring
Implement brush and bucket fill tools that correctly respect line art boundaries
Manage multiple coloring pages with easy next/previous navigation
Add undo/redo functionality to allow users to freely correct mistakes
Save and load user progress so work is never lost or overwritten
Build a simple, polished, and intuitive UI for an enjoyable user experience
This course is completely hands-on and practical. By the end, you’ll have a working coloring book app you can expand with your own art, stickers, or other interactive elements.
Who this course is for:
Developers with basic programming knowledge looking to make full Godot projects
Hobbyists or educators interested in creative apps for children or students
Anyone wanting to learn Godot by building a complete, functional, and enjoyable project
Requirements:
Basic programming knowledge (variables, functions, loops, conditionals)
Godot 4 installed on your computer
Take this course today and start building your interactive coloring book app right away!