Circle Rainbow

Simple effect of rotating rainbow colors

Shader code
shader_type canvas_item;

uniform float speed = 1.0;

void fragment() {
    float time = TIME * speed;
    
    vec2 uv = (UV - vec2(0.5)) * vec2(2.0);
    float dist = length(uv);
    
    float angle = atan(uv.y, uv.x);
    
    vec3 color = vec3(
        (sin(angle * 10.0 + time) + 1.0) * 0.5,
        (cos(angle * 5.0 + time) + 1.0) * 0.5,
        (sin(angle * 15.0 + time) + 1.0) * 0.5
    );
    
    color *= smoothstep(0.0, 1.0, 1.0 - dist);
    
    COLOR = vec4(color, 1.0);
}


//Leave comments if you want If you want a white light effect with a transparent background
//shader_type canvas_item;

//void fragment() {
//    float time = TIME;
    
//    vec2 uv = (UV - vec2(0.5)) * vec2(2.0);
//    float dist = length(uv);
//    float angle = atan(uv.y, uv.x);
    
//   float opacity = sin(angle * 5.0 + time) * 0.5 + 0.5;
    
//    opacity *= smoothstep(0.0, 1.0, 1.0 - dist);
    
//    COLOR = vec4(1.0, 1.0, 1.0, opacity);
//}
Tags
2d, light, rainbow
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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