AtomicGameEngine/Source/AtomicGlow/Kernel/LightRay.h

// Copyright (c) 2014-2017, THUNDERBEAST GAMES LLC All rights reserved
// Copyright 2009-2017 Intel Corporation
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//

#pragma once

#include "Embree.h"

#include "Atomic/Math/Vector3.h"

using namespace Atomic;

namespace AtomicGlow
{

class BakeMesh;

class LightRay
{

public:

    LightRay();
    ~LightRay();

    struct SamplePoint
    {
        SamplePoint()
        {
            Clear();
        }

        void Clear()
        {
            bakeMesh = 0;
            triangle = 0;
            radianceX = 0;
            radianceY = 0;
            position = normal = Vector3::ZERO;
            uv0 = uv0 = Vector2::ZERO;
        }

        BakeMesh* bakeMesh;
        unsigned triangle;

        // coords in radiance_
        unsigned radianceX;
        unsigned radianceY;

        Vector3 barycentric;
        Vector3 position;
        Vector3 normal;
        Vector2 uv0;
        Vector2 uv1;
    };

    void SetupRay(const Vector3& origin, const Vector3& dir, float tNear = 0.001f, float tFar = 99999.0f);

    void ClearHit();

    RTCRay rtcRay_;
    SamplePoint samplePoint_;

};

}