Simple Worldborder

Velnias75

A simple Minecraft style animated worldborder.

I am no shader expert, so please comment if there is something to improve.

Shader code
shader_type spatial;
render_mode shadows_disabled;

uniform float scale = 5.0;
uniform vec4 color : source_color = vec4(0.225, 0.97, 0.9, 0.25);

void fragment() {

	vec2 uv = UV * scale;
	float ar = (VIEWPORT_SIZE.x/VIEWPORT_SIZE.y);
	float t = (fract(TIME/7.5) * scale);
	float x = uv.x + (uv.y * ar) - t;

	ALPHA = 0.0;

	for(float i = -4.0; i < 4.0; i += 0.25) {

		float off = (i * scale) + x;

		if(off > 0.0 && off < 0.5) {
			ALBEDO = vec3(color.rgb) * mix(0.25, 1.0, off);
			ALPHA = color.a;
		}
	}
}
Tags
minecraft, worldborder
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.

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Trixelized
Trixelized
1 month ago

Shaders calculate for every individual pixel (more or less), so you don’t need to iterate at all. Here’s what I would personally do, recreating the Minecraft world border:

shader_type spatial;
render_mode unshaded, blend_add, world_vertex_coords;

varying vec3 worldPos;

uniform float freq = 5.0;
uniform float speed = 1.0;
uniform float cutoff: hint_range(0.0, 1.0) = 0.5;
uniform vec3 color: source_color = vec3(0.0, 0.5, 1.0);

void vertex() {
   worldPos = VERTEX;
}

void fragment() {
   float o = dot(worldPos, vec3(freq));
   float f = fract(speed * TIME + o);
   ALBEDO = color * step(cutoff, f);
}
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