jtBaseApp/node_modules/@cesium/engine/Source/Shaders/PolylineFS.glsl

#ifdef VECTOR_TILE
uniform vec4 u_highlightColor;
#endif

in vec2 v_st;

void main()
{
    czm_materialInput materialInput;

    vec2 st = v_st;
    st.t = czm_readNonPerspective(st.t, gl_FragCoord.w);

    materialInput.s = st.s;
    materialInput.st = st;
    materialInput.str = vec3(st, 0.0);

    czm_material material = czm_getMaterial(materialInput);
    out_FragColor = vec4(material.diffuse + material.emission, material.alpha);
#ifdef VECTOR_TILE
    out_FragColor *= u_highlightColor;
#endif

    czm_writeLogDepth();
}