export declare const vertexShader = "\n  varying vec2 vUv;\n  varying vec3 vPos;\n\n  void main() {\n    vUv = uv;\n    vPos = position;\n\n    gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.);\n  }\n";
export declare const fragmentShader = "\n  varying vec2 vUv;\n  varying vec3 vPos;\n\n  uniform sampler2D uTexture;\n  uniform float uTime;\n\n  void main() {\n    float time = uTime * 0.5;\n    vec2 repeat = -vec2(12., 3.);\n    // To repeat the uvs we need to multiply them by a scalar\n    // and then get the fractional part of it so they from 0 to 1\n    // To move them continuously we have to add time\n    // to the x or y component, to change the direction\n    vec2 uv = fract(vUv * repeat - vec2(time, 0.)); // The sign of time change direction of movement\n\n    // Fake shadow \u2014 vPos is object-space; large parts of the knot can have vPos.z <= 0,\n    // so clamp(vPos.z/5,0,1) is often 0 and the whole surface reads as black (no GL error).\n    float shadow = max(0.2, clamp(vPos.z / 5., 0., 1.));\n\n    vec3 texture = texture2D(uTexture, uv).rgb;\n    // texture *= vec3(uv.x, uv.y, 1.); // To help visualize the repeated uvs\n\n    gl_FragColor = vec4(texture * shadow, 1.);\n  }\n";