paulloz / godot-colorblindness

A colorblindness simulator to help you design for everyone.

godot-colorblindness

A colorblindness simulator to help you design for everyone.

If you like godot-colorblindness, please consider buying me a coffee:

The color calculations I use are heavily based on:

• Color Blindness Simulation Research
• Digital Video Colourmaps for Checking the Legibility of Displays by Dichromats
• This page on color space transformation matrixes
• The wikipedia page on sRGB

The Godot Ishihara plate has been generated with this tool.

Usage

• Install the plugin through Godot's AssetLib.
• Activate it from the Plugin menu (AssetLib => Plugins button).
• This adds a new control called Colorblindness under CanvasLayer.
• Create a new Colorblindness control to it in your scene.
• Specify the Type property (eg. Deuteranopia).

Everything that renders under the control will appear tinted to match your selected color-blindness mode.

Known issues

• Setting Framebuffer Allocation to 2D without Sampling makes the addon unusable (#4).

Sample

The following sample shows normal vision, Protanopia, Deuteranopia, and Tritanopia (in that order).

Normal vision

Protanopia

Deuteranopia

Tritanopia

godot-colorblindness's Issues

Black screen on GLES2

Hello! I'm not sure if this is GLES3-only, but I get the following error using GLES2:

E 0:00:00.436 _copy_screen: Can't use screen texture copying in a render target configured without copy buffers. <C++ Error> Condition "storage->frame.current_rt->copy_screen_effect.color == 0" is true. <C++ Source> drivers/gles2/rasterizer_canvas_base_gles2.cpp:734 @ _copy_screen()

3D scene issue - no effect is seen

I hope that's not just me (and that I'm doing something stupidly, embarassingly wrong), but I'm having trouble with the addon in a 3d scene.

I created a gradient material and applied it to a plane to test the functionality, but here's my repro:

1. Create a 3D scene
2. Add a camera
3. Add a meshinstance
4. Create a Plane
5. Create a material that would easily show a difference in color perception (I created a simple gradient on albedo)
6. Follow the steps found in usage: add a CanvasLayer
7. Add Colorblindness.gd as a child
8. Change the colorblindness type from the Type dropdown
9. Save and run scene.
10. Notice no change in color.

Mouse input bug

If you place the Colorblind canvas as a parent or even root of your scene, you may not be able to use any screen input.
To fix this you need to add the IGNORE property to the inner Colorblind's ColorRect node like this:

func _ready():
	self.add_child(self.rect)

	self.rect.rect_min_size = self.rect.get_viewport_rect().size
	self.rect.material = load("res://addons/paulloz.colorblindness/colorblindness.material")
	self.rect.set_mouse_filter(2) # ADD THIS LINE
	if self.temp:
		self.Type = self.temp
		self.temp = null

	self.get_tree().root.connect('size_changed', self, '_on_viewport_size_changed')