optixTriangle.h

#ifndef __PARAMS_H__
#define __PARAMS_H__
//
// Copyright (c) 2023, 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 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 ``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 THE COPYRIGHT OWNER OR
// CONTRIBUTORS 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
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
//
#include "camera.h"
#include "cuda_runtime.h"
#include "cuda_runtime_api.h"
#include "device_object.h"
#include "diffuse.h"
#include "driver_types.h"
#include "light.h"
#include "optix_types.h"
#include "vector_types.h"
#include <vector>

struct Params : public DeviceObject<Params>
{
    // settings
    unsigned int image_width       = 400;
    unsigned int image_height      = 300;
    unsigned int samples_per_frame = 4;

    Camera *camera = nullptr;

    // state
    unsigned int dt    = 0;
    bool         dirty = true;// redraw?

    // buffers
    uchar4 *image = nullptr;
    float3 *film  = nullptr;

    float                  tfactor = 1.0;
    OptixTraversableHandle handle  = 0;

    // world data
    float3          *normals      = nullptr;
    float3          *vertices     = nullptr;
    int             *mat_indices  = nullptr;
    int              nmat_indices = 0;
    LightVariant    *lights       = nullptr;
    int              nlights      = 0;
    DiffuseMaterial *materials    = nullptr;
    int              nmaterials   = 0;


    template<typename T> static __host__ void set_vector(std::vector<T> const &elements, T **ptr, int &size)
    {
        if (*ptr != nullptr) { cudaFree(*ptr); }
        size = static_cast<int>(elements.size());
        cudaMalloc(ptr, sizeof(T) * size);
        cudaMemcpy(*ptr, elements.data(), sizeof(T) * size, cudaMemcpyHostToDevice);
    }


    __host__ void set_mat_indices(std::vector<int> const &_mat_indices)
    {
        set_vector(_mat_indices, &mat_indices, nmat_indices);
    }

    __host__ void set_lights(std::vector<LightVariant> const &_lights) { set_vector(_lights, &lights, nlights); }

    __host__ void set_materials(std::vector<DiffuseMaterial> const &_materials)
    {
        set_vector(_materials, &materials, nmaterials);
    }

    __host__ void cleanup() const
    {
        cudaFree(film);
        cudaFree(normals);

        cudaFree(camera);
        cudaFree(lights);
        cudaFree(materials);
        cudaFree(mat_indices);
    }

    __host__ void alloc_film() { cudaMalloc(&film, sizeof(float3) * image_width * image_height); }

    __host__ void frame_step() { dt += samples_per_frame; }
};


struct RayGenData
{
    // No data needed
};


struct MissData
{
    float3 bg_color;
};


struct HitGroupData
{
    // No data needed
};

#endif