alexpete
57 lines
2.0 KiB
C++
57 lines
2.0 KiB
C++
/*
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* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
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* its licensors.
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*
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* For complete copyright and license terms please see the LICENSE at the root of this
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* distribution (the "License"). All use of this software is governed by the License,
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* or, if provided, by the license below or the license accompanying this file. Do not
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* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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*
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*/
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#pragma once
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#include <AzCore/Math/Vector2.h>
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#include <AzCore/Math/Vector3.h>
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#include <AzCore/Math/Vector4.h>
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#include <AzCore/std/containers/vector.h>
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// TODO: to be removed (LYN-782)
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namespace WhiteBox
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{
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class AZTangentSpaceCalculation
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{
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public:
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void Calculate(
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const AZStd::vector<AZ::Vector3>& vertices, const AZStd::vector<uint32_t>& indices,
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const AZStd::vector<AZ::Vector2>& uvs);
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size_t GetBaseCount() const;
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// Returns an orthogonal base (perpendicular and normalized)
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void GetBase(AZ::u32 index, AZ::Vector3& tangent, AZ::Vector3& bitangent, AZ::Vector3& normal) const;
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AZ::Vector3 GetTangent(AZ::u32 index) const;
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AZ::Vector3 GetBitangent(AZ::u32 index) const;
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AZ::Vector3 GetNormal(AZ::u32 index) const;
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private:
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struct Base33
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{
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Base33() = default;
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Base33(const AZ::Vector3& tangent, const AZ::Vector3& bitangent, const AZ::Vector3& normal);
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AZ::Vector3 m_tangent = AZ::Vector3(0.0f, 0.0f, 0.0f);
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AZ::Vector3 m_bitangent = AZ::Vector3(0.0f, 0.0f, 0.0f);
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AZ::Vector3 m_normal = AZ::Vector3(0.0f, 0.0f, 0.0f);
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};
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void AddNormalToBase(AZ::u32 index, const AZ::Vector3& normal);
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void AddUVToBase(AZ::u32 index, const AZ::Vector3& u, const AZ::Vector3& v);
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float CalcAngleBetween(const AZ::Vector3& a, const AZ::Vector3& b);
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AZStd::vector<Base33> m_baseVectors;
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};
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} // namespace WhiteBox
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