o3de/Gems/Atom/Feature/Common/Assets/Shaders/Materials/Skin/Skin_LightingEval.azsli

/*
 * Copyright (c) Contributors to the Open 3D Engine Project.
 * For complete copyright and license terms please see the LICENSE at the root of this distribution.
 *
 * SPDX-License-Identifier: Apache-2.0 OR MIT
 *
 */

#pragma once

// This #define magic lets you use the EvaluateLighting function in this file without making it the final EvaluateLighting
// used in your shader. Simply #define EvaluateLighting to your custom definition before including this file
//
#ifndef EvaluateLighting
#define EvaluateLighting EvaluateLighting_SkinPBR
#endif

#include "../BasePBR/BasePBR_LightingEval.azsli"

void InitializeLightingData_SkinPBR(inout Surface surface, float4 screenPosition, float3 viewPosition[MAX_SHADING_VIEWS], inout LightingData lightingData)
{
    // --- Base PBR ---
    InitializeLightingData_BasePBR(surface, screenPosition, viewPosition, lightingData);

    // --- Skin PBR ---
    lightingData.diffuseAmbientOcclusion = surface.diffuseAmbientOcclusion;
    lightingData.specularOcclusion = surface.specularOcclusion;
}

LightingData EvaluateLighting_SkinPBR(inout Surface surface, float4 screenPosition, float3 viewPosition[MAX_SHADING_VIEWS])
{
    LightingData lightingData;
    InitializeLightingData_SkinPBR(surface, screenPosition, viewPosition, lightingData);
    CalculateLighting_BasePBR(surface, screenPosition, lightingData);
    return lightingData;
}