export declare const fragmentShaderSource = "  \n    precision mediump float;\n\n    uniform vec2 uResolution;\n    uniform float uTime;\n    uniform sampler2D uTextureCurrent;   // Current image\n    uniform sampler2D uTextureNext;     // Next image\n    uniform sampler2D uTexturePrevious;     // Back image\n    uniform vec2 uMouse;             // Mouse position in normalized coordinates [0,1]\n    uniform float uRadius;           // Base radius of the reveal area\n    uniform float uTimeRange;           // Base radius of the reveal area\n\n    // Fake noise function using sin()\n    float noise(vec2 uv) {\n        return fract(sin(dot(uv, vec2(12.9898, 78.233))) * 43758.5453);\n    }\n\n    void main() {\n        vec2 uv = gl_FragCoord.xy / uResolution;\n\n        // rotate Y\n        uv.y = 1.0 - uv.y;\n        \n        // Make the radius oscillate over time\n        float dynamicRadius = uRadius + sin(uTime * uTimeRange) * 0.005;\n\n        // Compute distance from mouse position\n        float dist = length(uv - uMouse);\n        \n        // Add randomness to create an irregular shape\n        float randomOffset = noise(uv * 50.0) * 0.05;\n        \n        // Final \"cloudy\" mask with gaps\n        float cloudMask = smoothstep(dynamicRadius  + randomOffset, dynamicRadius * .28, dist);\n\n        // Sample both textures\n        vec4 currentColor = texture2D(uTextureCurrent, uv);\n        vec4 nextColor = texture2D(uTextureNext, uv);\n        vec4 previousColor = texture2D(uTexturePrevious, uv);\n\n        // Blend images based on the distorted reveal mask\n        vec4 finalColor = mix(currentColor, nextColor, cloudMask);\n\n        if(uMouse.x <= 0.6 ){\n            float mixValue = (0.6 - uMouse.x)/0.2;\n            if(uMouse.x < 0.4) mixValue=1.0;\n            vec4 mixture = mix(nextColor, previousColor,mixValue);\n            finalColor = mix(currentColor, mixture, cloudMask);\n        }\n        gl_FragColor = finalColor;\n    }\n\n";