cocos-creator-template/assets/chunks/shading-entries/main-functions/render-planar-shadow/fs.chunk

in highp float v_dist;

layout(location = 0) out vec4 fragColorX;

void main () {
  // better performance than SurfacesFragmentModifyBaseColorAndTransparency
#ifdef CC_SURFACES_FRAGMENT_ALPHA_CLIP_ONLY
  SurfacesFragmentAlphaClipOnly();
#endif

  if(v_dist < 0.0)
    discard;
  fragColorX = cc_shadowColor;
}