playcanvas

Version:
Open-source WebGL/WebGPU 3D engine for the web
3 lines (2 loc) • 1.03 kB
TypeScript
declare const _default: "\n    #ifdef VIGNETTE\n        uniform vignetterParams: vec4f;\n        uniform vignetteColor: vec3f;\n        \n        // Global variable for debug\n        var<private> dVignette: f32;\n        \n        fn calcVignette(uv: vec2f) -> f32 {\n            let inner = uniform.vignetterParams.x;\n            let outer = uniform.vignetterParams.y;\n            let curvature = uniform.vignetterParams.z;\n            let intensity = uniform.vignetterParams.w;\n\n            // edge curvature\n            let curve = pow(abs(uv * 2.0 - 1.0), vec2f(1.0 / curvature));\n\n            // distance to edge\n            let edge = pow(length(curve), curvature);\n\n            // gradient and intensity\n            dVignette = 1.0 - intensity * smoothstep(inner, outer, edge);\n            return dVignette;\n        }\n\n        fn applyVignette(color: vec3f, uv: vec2f) -> vec3f {\n            return mix(uniform.vignetteColor, color, calcVignette(uv));\n        }\n    #endif\n";
export default _default;