world coordinates grid b&w shader

This shader displays a grid on every surface aligned with the unit vectors, it displays a jagged grid otherwise. This shader is useful for prototyping levels, especially when working with CSGs.

Shader code
shader_type spatial;
varying vec3 world_position;


void vertex() {
	world_position = VERTEX;
}

const float gridSize = 3.5;

void fragment(){
	vec3 pos = world_position;
	pos /= gridSize;
	pos += gridSize * 20.0;
	//to offset a bug that appears when one of the coordinate is close to 0
	//can be tweaked if the bug is visible
	pos.y += 1.0*float(fract(float(int(pos.x*2.0))/2.0));
	pos.z += float(fract(float(int(pos.y*2.0))/2.0));
	vec3 col = vec3(fract(float(int(pos.z*2.0))/2.0));
	ROUGHNESS = col.x/2.0 + 0.2;
	ALBEDO = col;
}
Tags
black and white, grid, prototyping, Spatial, world coordinates
The shader code and all code snippets in this post are under CC0 license and can be used freely without the author's permission. Images and videos, and assets depicted in those, do not fall under this license. For more info, see our License terms.

Related shaders

Simple World Triplanar Grid (Allows Transparency)

Dashed Grid (The Best Darn Grid Shader (Yet))

Beefed up World Normal Mix Shader v1.1

Subscribe
Notify of
guest

3 Comments
Oldest
Newest Most Voted
Inline Feedbacks
View all comments
doradoro
3 years ago

How can i adjust the grid size? I would like to put it in meters

doradoro
2 years ago
Reply to  doradoro

I fixed the Zero problem, added color and lines:

https://gist.github.com/doradoro/4deaa7d29895e1d195245df9235977a0

Belzecue
Belzecue
8 months ago
	vec3 pos = world_position;
	pos /= gridSize;
	pos += gridSize * 20.0;

This can be moved into the vertex function, because it never changes in fragment() per vertex, so may as well only calculate it per vertex instead of per pixel.

e.g.

void vertex() {
	world_position = VERTEX;
	world_position /= gridSize;
	world_position += gridSize * 20.0;
}

void fragment(){
	vec3 pos = world_position;
	...
}