declare const _default: "\nuniform vec4 color;\nuniform vec4 bgColor;\nuniform float speed;\nuniform float startTime;\nuniform float bidirectional;\nuniform float globalAlpha;\n\nczm_material czm_getMaterial(czm_materialInput materialInput) {\n  czm_material material = czm_getDefaultMaterial(materialInput);\n  vec2 st = materialInput.st;\n  float t = fract(startTime + czm_frameNumber * speed / 1000.0);\n\n  t *= 1.03;\n  float alpha0 = smoothstep(t - 0.03, t, st.s) * step(st.s, t);\n  float mt = 1. - t;\n  float alphaVC = smoothstep(mt + 0.03, mt, st.s) * step(mt, st.s);\n\n  float a0 = step(abs(bidirectional - 0.0) - 0.001, 0.);\n  float a1 = step(abs(bidirectional - 1.0) - 0.001, 0.);\n  float db = step(abs(bidirectional - 2.0) - 0.001, 0.);\n  float alpha = alpha0 * (a0 + db) + alphaVC * (a1 + db);\n  alpha = clamp(alpha, 0., 1.);\n\n  material.diffuse = color.rgb * alpha + bgColor.rgb * (1. - alpha);\n  material.alpha = (color.a * alpha + bgColor.a * (1. - alpha)) * globalAlpha;\n\n    // if (useImageAndRepeat.x != 0.) {\n    //     float repeat = useImageAndRepeat.y;\n    //     vec4 vcImageColor = texture(image, fract(vec2(fract((st.s-t)*repeat), st.t)));\n    //     material.diffuse = vcImageColor.rgb;\n    //     material.alpha = vcImageColor.a;\n    // }\n\n  return material;\n}\n";
export default _default;
//# sourceMappingURL=VcODLineMaterial.d.ts.map