pathtracer_queues.h

/*
 * Fermat
 *
 * Copyright (c) 2016-2019, NVIDIA CORPORATION. All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *    * Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *    * Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *    * Neither the name of the NVIDIA CORPORATION nor the
 *      names of its contributors may be used to endorse or promote products
 *      derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL NVIDIA CORPORATION BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#include <pathtracer.h>
#include <ray.h>
#include <cugar/basic/cuda/warp_atomics.h>




// A class encapsulating the path tracing queues
//
struct PTRayQueue
{
    MaskedRay*  rays;       // rays
    Hit*        hits;       // ray hits
    float4*     weights;    // path weight
    float4*     weights_d;  // diffuse path weight
    float4*     weights_g;  // glossy path weight
    uint4*      pixels;     // path pixel info
    float2*     cones;      // ray cones
    uint32*     size;       // queue size

    FERMAT_HOST
    PTRayQueue() :
        rays(NULL),
        hits(NULL),
        weights(NULL),
        weights_d(NULL),
        weights_g(NULL),
        pixels(NULL),
        cones(NULL),
        size(NULL) {}

    FERMAT_DEVICE
    void warp_append(const uint32 pixel_info, const MaskedRay& ray, const float4 weight, const cugar::Vector2f cone = cugar::Vector2f(0), const uint32 vertex_info = uint32(-1), const uint32 nee_slot = uint32(-1))
    {
        const uint32 slot = cugar::cuda::warp_increment(size);

        rays[slot]      = ray;
        weights[slot]   = weight;
        pixels[slot]    = make_uint4( pixel_info, vertex_info, nee_slot, uint32(-1) );
        if (cones)
            cones[slot]     = cone;
    }

    FERMAT_DEVICE
    void warp_append(const uint32 pixel_info, const MaskedRay& ray, const float4 weight, const float4 weight_d, const float4 weight_g, const uint32 vertex_info = uint32(-1), const uint32 nee_slot = uint32(-1), const uint32 nee_cluster = uint32(-1))
    {
        const uint32 slot = cugar::cuda::warp_increment(size);

        rays[slot]      = ray;
        weights[slot]   = weight;

        if (weights_d)
            weights_d[slot] = weight_d;
        if (weights_g)
            weights_g[slot] = weight_g;

        pixels[slot]    = make_uint4( pixel_info, vertex_info, nee_slot, nee_cluster );
    }
};