External/HIP/workload/ray-tracing/TheNextWeek/ray.h

#ifndef RAY_H
#define RAY_H
//==============================================================================================
// Originally written in 2016 by Peter Shirley <ptrshrl@gmail.com>
//
// To the extent possible under law, the author(s) have dedicated all copyright
// and related and neighboring rights to this software to the public domain
// worldwide. This software is distributed without any warranty.
//
// You should have received a copy (see file COPYING.txt) of the CC0 Public
// Domain Dedication along with this software. If not, see
// <http://creativecommons.org/publicdomain/zero/1.0/>.
//
// The original source code is from
//    https://github.com/RayTracing/raytracing.github.io/tree/release/src/TheNextWeek
//
// Changes to the original code follow the following license.
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//==============================================================================================

#include "vec3.h"


class ray {
  public:
    __host__ __device__ ray() {}

    __host__ __device__ ray(const point3 &origin, const vec3 &direction)
        : orig(origin), dir(direction) {}

    __host__ __device__ ray(const point3& origin, const vec3& direction, double time)
      : orig(origin), dir(direction), tm(time)
    {}

    __host__ __device__ point3 origin() const { return orig; }
    __host__ __device__ vec3 direction() const { return dir; }
    __host__ __device__ double time() const    { return tm; }

    __host__ __device__ point3 at(double t) const { return orig + t * dir; }

  private:
    point3 orig;
    vec3 dir;
    double tm;
};

#endif