alexpete
71 lines
2.0 KiB
C++
71 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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// Original file Copyright Crytek GMBH or its affiliates, used under license.
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#ifndef CRYINCLUDE_CRY3DENGINE_CBUFFER_H
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#define CRYINCLUDE_CRY3DENGINE_CBUFFER_H
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#pragma once
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#include <AzCore/Casting/numeric_cast.h>
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#define Point2d Vec3
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struct SPlaneObject
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{
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Plane plane;
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Vec3_tpl<uint8> vIdx1, vIdx2;
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void Update()
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{
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//avoid breaking strict aliasing rules
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union f32_u
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{
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float floatVal;
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uint32 uintVal;
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};
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f32_u ux;
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ux.floatVal = plane.n.x;
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f32_u uy;
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uy.floatVal = plane.n.y;
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f32_u uz;
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uz.floatVal = plane.n.z;
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uint32 bitX = ux.uintVal >> 31;
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uint32 bitY = uy.uintVal >> 31;
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uint32 bitZ = uz.uintVal >> 31;
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vIdx1.x = aznumeric_caster(bitX * 3 + 0);
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vIdx2.x = aznumeric_caster((1 - bitX) * 3 + 0);
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vIdx1.y = aznumeric_caster(bitY * 3 + 1);
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vIdx2.y = aznumeric_caster((1 - bitY) * 3 + 1);
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vIdx1.z = aznumeric_caster(bitZ * 3 + 2);
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vIdx2.z = aznumeric_caster((1 - bitZ) * 3 + 2);
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}
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};
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class CPolygonClipContext
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{
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public:
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CPolygonClipContext();
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void Reset();
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const PodArray<Vec3>& Clip(const PodArray<Vec3>& poly, const Plane* planes, size_t numPlanes);
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const PodArray<Vec3>& Clip(const Vec3& a, const Vec3& b, const Vec3& c, const Plane* planes, size_t numPlanes);
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void GetMemoryUsage(ICrySizer* pSizer) const;
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private:
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PodArray<Vec3> m_lstPolygonA;
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PodArray<Vec3> m_lstPolygonB;
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};
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#endif // CRYINCLUDE_CRY3DENGINE_CBUFFER_H
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