playcanvas/build/playcanvas/src/scene/shader-lib/wgsl/chunks/render-pass/frag/compose/compose-vignette.js

Open-source WebGL/WebGPU 3D engine for the web

var composeVignettePS = `
	#ifdef VIGNETTE
		uniform vignetterParams: vec4f;
		uniform vignetteColor: vec3f;
		
		var<private> dVignette: f32;
		
		fn calcVignette(uv: vec2f) -> f32 {
			let inner = uniform.vignetterParams.x;
			let outer = uniform.vignetterParams.y;
			let curvature = uniform.vignetterParams.z;
			let intensity = uniform.vignetterParams.w;
			let curve = pow(abs(uv * 2.0 - 1.0), vec2f(1.0 / curvature));
			let edge = pow(length(curve), curvature);
			dVignette = 1.0 - intensity * smoothstep(inner, outer, edge);
			return dVignette;
		}
		fn applyVignette(color: vec3f, uv: vec2f) -> vec3f {
			return mix(uniform.vignetteColor, color, calcVignette(uv));
		}
	#endif
`;

export { composeVignettePS as default };