#include "def_effect.fx"

//=============================================================================
//ij¸¯ÅÍ Bump Map Æ÷ÇÔ
VS_BUMP_OUTPUT BumpMap_VS( VS_BUMP_INPUT In )
{
    VS_BUMP_OUTPUT Out = (VS_BUMP_OUTPUT)0; 
    
    float4 pos    = In.position;
    float3 normal = In.normal;
    float3 tangent = In.tangent;
    float flipper = In.tangent.w;
    float4 tex    = 0;
    float4 output_pos, pos_world;

    pos_world = SkinPoint(  pos   , blendMatrices, In.indices, In.weights); // pos is changed.
    float3 N = SkinVector( normal, blendMatrices, In.indices, In.weights); // normal is changed.
    SkinVector( tangent, blendMatrices, In.indices, In.weights); // tangent is changed.

    float3 binormal = flipper*cross(normal, tangent);

    // transform position to screen space before changing it.
    output_pos = mul( pos_world, view_proj_matrix );
    Out.position = output_pos;

	//apply fog
	float distfog = saturate((fFogDistEnd - output_pos.z)/(fFogDistEnd - fFogDistStart));
	float heightfog = saturate((fFogHeightEnd - pos_world.z)/(fFogHeightEnd - fFogHeightStart));
	Out.fog = min(distfog, heightfog);


	// light vector
	float3 light_vec = Light_position - pos_world;
    //float  nLength = length(light_vec);
    //float3 L = normalize(light_vec);

	//float Atten = 1/(1+(Light_ambient.a*nLength));

    // eye-baseÀÇ half-way º¤ÅÍ
    float3 eye_vector = Camera_position - pos_world;
    //float3 halfway = (normalize(eye_vector) - normalize(Light_direction_forsp));

    //float ddot = saturate(dot(N, L));
	//float sdot = saturate(dot(N, halfway));

    //Out.diffuse   = Light_ambient + max(Light_diffuse * ddot * Atten, Light_specular * pow(sdot, 7));     // specular + diffuse + ambient 
    //Out.diffuse.a = fVisibility;

    tex      = fUVAnimation.w*In.texCoord + fUVAnimation;

	//Out.specular     = Light_specular;
    Out.texCoord0    = tex;
    Out.texCoord1    = tex;

    // tangent space calc
    Out.texCoord2.x = dot(light_vec, tangent);
    Out.texCoord2.y = dot(light_vec, binormal);
    Out.texCoord2.z = dot(light_vec, normal);
    Out.texCoord2.w = 1;
    Out.texCoord3.x = dot(Light_halfway, tangent);
    Out.texCoord3.y = dot(Light_halfway, binormal);
    Out.texCoord3.z = dot(Light_halfway, normal);
    Out.texCoord3.w = 1;

    return Out;    
}

float4 BumpMap_PS( PS_BUMP_INPUT In ) : COLOR
{
	float4 d_col = tex2D(DiffTexture, In.texCoord0);
	float4 outc;
	float4 n = tex2D(BumpTexture, In.texCoord1);
	float glossness = n.w;
	n = n*2 - 1;
	float4 illum = tex2D(IllumTexture, In.texCoord0);

	float3 light_vec = In.texCoord2;
	float light_length = length(light_vec);
	float3 halfway_vec = In.texCoord3;
	light_vec = normalize(light_vec);
	halfway_vec = normalize(halfway_vec);
	float ddot = saturate(dot(n, light_vec));
	float sdot = saturate(dot(n, halfway_vec));

	float Atten = 1/(1+(Light_ambient.a*light_length));

	float4 m_col = Light_ambient + Light_diffuse * ddot * Atten;
	outc = d_col*m_col*2 + Light_specular * pow(sdot, 7) * glossness + illum;
	outc.w = Light_diffuse.w*d_col.w;

    return outc;
}

//============================================================================= 
//Bump Å×Å©´Ð
technique BumpTech_2x
{
    pass P0
    {
		VertexShader = compile vs_2_0 BumpMap_VS();
        PixelShader = compile ps_2_0 BumpMap_PS();
    }
}