Debug drawing utility for Godot

This is an add-on for debug drawing in 3D and for some 2D overlays, which is written in C++ and can be used with GDScript or C#.

Based on my previous addon, which was developed only for C#, and which was inspired by Zylann's GDScript addon

Documentation

Godot 3 version

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Features

3D:

• Arrow
• Billboard opaque square
• Box
• Camera Frustum
• Cylinder
• Gizmo
• Grid
• Line
• Line Path
• Line with Arrow
• Plane
• Points
• Position 3D (3 crossing axes)
• Sphere

2D:

• [Work in progress]

Overlay:

• Text (with grouping and coloring)
• FPS Graph
• Custom Graphs

Precompiled for:

• Windows
• Linux (built on Ubuntu 20.04)
• macOS (10.15+)
• Android (5.0+)
• iOS
• Web (Firefox not supported)

This addon supports working with several World3D and different Viewports. There is also a no depth test mode and other settings that can be changed for each instance.

This library supports double-precision builds, for more information, see the documentation.

Interactive Web Demo

Download

To download, use the Godot Asset Library or use one of the stable versions from the GitHub Releases page.

For versions prior to 1.4.5, just download one of the source codes in the assets. For newer versions, download debug-draw-3d_[version].zip.

Installation

• Close editor
• Copy addons/debug_draw_3d to your addons folder, create it if the folder doesn't exist
• Launch editor

Examples

More examples can be found in the examples_dd3d/ folder.

Simple test:

func _process(delta: float) -> void:
    var _time = Time.get_ticks_msec() / 1000.0
    var box_pos = Vector3(0, sin(_time * 4), 0)
    var line_begin = Vector3(-1, sin(_time * 4), 0)
    var line_end = Vector3(1, cos(_time * 4), 0)

    DebugDraw3D.draw_box(box_pos, Vector3(1, 2, 1), Color(0, 1, 0))
    DebugDraw3D.draw_line(line_begin, line_end, Color(1, 1, 0))
    DebugDraw2D.set_text("Time", _time)
    DebugDraw2D.set_text("Frames drawn", Engine.get_frames_drawn())
    DebugDraw2D.set_text("FPS", Engine.get_frames_per_second())
    DebugDraw2D.set_text("delta", delta)

An example of using scoped configs:

@tool
extends Node3D

func _ready():
    # Set the base scoped_config.
    # Each frame will be reset to these scoped values.
    DebugDraw3D.scoped_config().set_thickness(0.1).set_center_brightness(0.6)

func _process(delta):
    # Draw using the base scoped config.
    DebugDraw3D.draw_box(Vector3.ZERO, Quaternion.IDENTITY, Vector3.ONE * 2, Color.CORNFLOWER_BLUE)
    if true:
        # Create a scoped config that will exist until exiting this if.
        var _s = DebugDraw3D.new_scoped_config().set_thickness(0).set_center_brightness(0.1)
        # Draw with a thickness of 0
        DebugDraw3D.draw_box(Vector3.ZERO, Quaternion.IDENTITY, Vector3.ONE, Color.RED)
        # If necessary, the values inside this scope can be changed
        # even before each call to draw_*.
        _s.set_thickness(0.05)
        DebugDraw3D.draw_box(Vector3(1,0,1), Quaternion.IDENTITY, Vector3.ONE * 1, Color.BLUE_VIOLET)

Tip

If you want to use a non-standard Viewport for rendering a 3d scene, then do not forget to specify it in the scoped config!

API

This project has a separate documentation page.

Also, a list of all functions is available in the documentation inside the editor (see DebugDraw3D and DebugDraw2D).

Known issues and limitations

The text in the keys and values of a text group cannot contain multi-line strings.

The entire text overlay can only be placed in one corner, unlike DataGraphs.

Frustum of Camera3D does not take into account the window size from ProjectSettings.

More screenshots

DebugDrawDemoScene.tscn in editor

DebugDrawDemoScene.tscn in play mode