struct SurfacesStandardVertexIntermediate
{
  //local space
  highp vec4 position;
  vec3 normal;
#if CC_SURFACES_USE_TANGENT_SPACE
  vec4 tangent;
#endif

  //other data
#if CC_SURFACES_USE_VERTEX_COLOR
  vec4 color;
#endif

  vec2 texCoord;
#if CC_SURFACES_USE_SECOND_UV
  vec2 texCoord1;
#endif

  //transformed
  highp vec4 clipPos;
  highp vec3 worldPos;
  vec4 worldNormal; // a: two side sign
  #if CC_SURFACES_USE_TANGENT_SPACE
    vec3 worldTangent, worldBinormal;
  #endif

  //transfered
#if CC_RECEIVE_SHADOW || CC_USE_REFLECTION_PROBE
  vec4 shadowBiasAndProbeId;
#endif

#if CC_USE_FOG != CC_FOG_NONE && !CC_USE_ACCURATE_FOG
  float fogFactor;
#endif

#if CC_USE_LIGHTMAP && !CC_FORWARD_ADD
  vec3 lightmapUV;
#endif
};


#if CC_USE_MORPH
  #if __VERSION__ < 450
    int getVertexId() {
      return int(a_vertexId);
    }
  #else
    int getVertexId() {
      return gl_VertexIndex; // vulkan convension
    }
  #endif
#endif