#include "common.hlsli"
#include "skin.hlsli"

struct vf
{
    float4 hpos : POSITION;
    float2 tc0 : TEXCOORD0; // base
    float4 c0 : COLOR0; // color
    float fog : FOG;
};

vf _main(v_model v)
{
    vf o;

    o.hpos = mul(m_WVP, v.P); // xform, input in world coords
    o.tc0 = v.tc.xy; // copy tc
    o.fog = saturate(calc_fogging(float4(mul(m_W, v.P), 1))); // fog, input in world coords

    // calculate fade
    float3 dir_v = normalize(mul(m_WV, v.P));
    float3 norm_v = normalize(mul(m_WV, v.N));
    float fade = 0.9 * abs(dot(dir_v, norm_v));
    o.c0 = fade;

    return o;
}

#ifdef SKIN_NONE
vf main(v_model v)
{
    return _main(v);
}
#endif

#ifdef SKIN_0
vf main(v_model_skinned_0 v)
{
    return _main(skinning_0(v));
}
#endif

#ifdef SKIN_1
vf main(v_model_skinned_1 v)
{
    return _main(skinning_1(v));
}
#endif

#ifdef SKIN_2
vf main(v_model_skinned_2 v)
{
    return _main(skinning_2(v));
}
#endif

#ifdef SKIN_3
vf main(v_model_skinned_3 v)
{
    return _main(skinning_3(v));
}
#endif

#ifdef SKIN_4
vf main(v_model_skinned_4 v)
{
    return _main(skinning_4(v));
}
#endif
