o3de/Gems/Atom/Feature/Common/Assets/Shaders/Materials/StandardMultilayerPBR/StandardMultilayerPBR_VertexEval.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

#ifndef EvaluateVertexGeometry
#define EvaluateVertexGeometry  EvaluateVertexGeometry_StandardMultilayerPBR
#endif

#include <Atom/Feature/Common/Assets/Shaders/Materials/BasePBR/BasePBR_VertexEval.azsli>
    
VsOutput EvaluateVertexGeometry_StandardMultilayerPBR(
    const MaterialParameters params,
    float3 position,
    float3 normal,
    float4 tangent,
    float2 uv0,
    float2 uv1,
    float3 vertexBlendMask,
    VsSystemValues SV)
{
    VsOutput output = EvaluateVertexGeometry_BasePBR(params, position, normal, tangent, uv0, uv1, SV, false, float4(1.0f, 1.0f, 1.0f, 1.0f));

#if MATERIAL_USES_VERTEX_BLENDMASK
    if(o_blendMask_isBound)
    {
        output.blendFactors = float4(vertexBlendMask, 0);
    }
    else
    {
        output.blendFactors = float4(0,0,0,0);
    }
#endif // MATERIAL_USES_VERTEX_BLENDMASK

    return output;
}

VsOutput EvaluateVertexGeometry_StandardMultilayerPBR(VsInput IN, VsSystemValues SV, const MaterialParameters params)
{
    return EvaluateVertexGeometry_StandardMultilayerPBR(
        params,
        IN.position,
        IN.normal,
        IN.tangent,
        IN.uv0,
        IN.uv1,
#if MATERIAL_USES_VERTEX_BLENDMASK
        IN.m_optional_blendMask.rgb,
#else
        float3(0, 0, 0),
#endif
        SV);
}