RayTracing.cpp

#include "RayTracing.h"



int main()
{
	Hittable_List world;


	auto ground_material = std::make_shared<Lambertian>(Color(0.5, 0.5, 0.5));
	world.add(std::make_shared<Sphere>(Point3(0, -1000, 0), 1000, ground_material));

	for(int a = -11; a < 11; a++)
	{
		for(int b = -11; b < 11; b++)
		{
			auto choose_mat = random_double();
			Point3 center(a + 0.9 * random_double(), 0.2, b + 0.9 * random_double());

			if ((center - Point3(4,0.2,0)).length() > 0.9)
			{
				std::shared_ptr<Material> sphere_material;

				if (choose_mat < 0.8)
				{
					// diffuse
					auto albedo = Color::random() * Color::random();
					sphere_material = std::make_shared<Lambertian>(albedo);
					world.add(std::make_shared<Sphere>(center, 0.2, sphere_material));
				} else if (choose_mat < 0.95)
				{
					// Metal
					auto albedo = Color::random(0.5, 1);
					auto fuzz = random_double(0, 0.5);
					sphere_material = std::make_shared<Metal>(albedo, fuzz);
					world.add(std::make_shared<Sphere>(center, 0.2, sphere_material));
				} else
				{
					// Glass
					sphere_material = std::make_shared<Dialectric>(1.5);
					world.add(std::make_shared<Sphere>(center, 0.2, sphere_material));
				}
			}
		}
	}

	auto material1 = std::make_shared<Dialectric>(1.5);
	world.add(std::make_shared<Sphere>(Point3(0, 1, 0), 1.0, material1));

	auto material2 = std::make_shared<Lambertian>(Color(0.4, 0.2, 0.1));
	world.add(std::make_shared<Sphere>(Point3(-4, 1, 0), 1.0, material2));

	auto material3 = std::make_shared<Metal>(Color(0.7, 0.6, 0.5), 0.0);
	world.add(std::make_shared<Sphere>(Point3(4, 1, 0), 1.0, material3));

	Camera cam;

	cam.aspect_ratio = 16.0 / 9.0;
	cam.image_width = 1200;
	cam.samples_per_pixel = 500;
	cam.max_depth = 50;

	cam.vfov = 20;
	cam.lookfrom = Point3(13, 2, 3);
	cam.lookat = Point3(0, 0, 0);
	cam.vup = Vec3(0, 1, 0);

	cam.defocus_angle = 0.6;
	cam.focus_dist = 10.0;

	cam.render(world);
	return 0;
}