package main

import (
	"fmt"
  "os"
  "time"
)

func main() {
  start := time.Now();

  mat_ground := Lambertian{Vec3{0.8, 0.8, 0}};
  mat_centre := Lambertian{Vec3{0.1, 0.2, 0.5}};
  mat_left   := Metal{Vec3{0.8, 0.8, 0.8}, 0.3};
  mat_right  := Metal{Vec3{0.8, 0.6, 0.2}, 1.0};

  var world Hittables;
  world.Add(Sphere{Vec3{ 0,   -100.5, -1  }, 100  , mat_ground});
  world.Add(Sphere{Vec3{ 0,      0  , -1.2},   0.5, mat_centre});
  world.Add(Sphere{Vec3{-1.0,    0  , -1  },   0.5, mat_left});
  world.Add(Sphere{Vec3{ 1.0,    0  , -1  },   0.5, mat_right});

  cam := NewCamera(400, 16.0/9.0, 100, 50);
  cam.Render(world);

  dur := time.Since(start);
  fmt.Fprintf(os.Stderr,
              "Done, in %5.2f seconds!    \n",
              dur.Seconds());
}