uniform  mat4  uMatrixMvp;
uniform  mat3  uMatrixNormal;
uniform  mat4  uMatrixModelview;
uniform  vec4  uLightPosition;
varying  vec3  vLightVector;
varying  vec3  vLightHalfVector;
varying  vec3  vNormal;

VERTEX_SHADER_USE_SHADOWS
VERTEX_SHADER_USE_POSITION
VERTEX_SHADER_USE_NORMALS
VERTEX_SHADER_USE_TEXCOORD
VERTEX_SHADER_NEED_TEX_COORD
VERTEX_SHADER_USE_LIGHT_ATTENUATION

void vertexPhong(vec4 position, vec3 normal)
{
   normal = uMatrixNormal * normal;
   position = uMatrixModelview * position;

#ifdef NORMALIZE_NORMALS
   normal = normalize(normal);
#endif //NORMALIZE_NORMALS

#ifdef LIGHT_DIRECTIONAL
   vLightVector = uLightPosition.xyz;
#else
   vLightVector = uLightPosition.xyz - position.xyz;

#ifdef LIGHT_ATTENUATION
   vLightDist = length(vLightVector);
#endif //LIGHT_ATTENUATION

   vLightVector = normalize(vLightVector);
#endif //LIGHT_DIRECTIONAL

   vLightHalfVector = normalize(normalize(-position.xyz) + vLightVector);
   vNormal = normal;
}

void main() {

   VERTEX_SHADER_POSITION
   VERTEX_SHADER_NORMAL
   VERTEX_SHADER_TEXCOORD

   gl_Position = uMatrixMvp * position;
   vertexPhong(position, normal);

   VERTEX_SHADER_SHADOWED
}