varying vec3 v_fragpos;
varying vec3 v_normal;


#if NORMALMAP
varying vec3 v_tangent;
varying vec3 v_bitangent;
attribute vec3 tangent;
#endif

uniform vec3 z_sun_direction;
varying vec3 Lsun;

void main()
{
    gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
    gl_TexCoord[0] = gl_MultiTexCoord0;
    v_normal = gl_NormalMatrix * gl_Normal;
#if NORMALMAP
    v_tangent = gl_NormalMatrix * tangent;
    v_bitangent = cross(v_normal, v_tangent);
#endif
    v_fragpos = (gl_ModelViewMatrix * gl_Vertex).xyz;

    Lsun = -(gl_NormalMatrix * normalize(z_sun_direction));
}