/// <summary>
/// Creates a camera.
/// </summary>
/// <param name="lookFrom">The point where the camera is located</param>
/// <param name="lookAt">The point that the camera is looking at</param>
/// <param name="up">The up direction</param>
/// <param name="verticalFov">Vertical field of view in radians</param>
/// <param name="aspectRatio">width over height</param>
public Camera(
UnitCircleUniformSampler rng,
Vector3 lookFrom,
Vector3 lookAt,
Vector3 up,
double verticalFov,
double aspectRatio,
double aperature,
double focusDist)
{
this.rng = rng;
this.lensRadius = aperature / 2.0;
double halfHeight = Math.Atan(verticalFov / 2.0);
double halfWidth = aspectRatio * halfHeight;
this.origin = lookFrom;
this.w = (lookFrom - lookAt).ToUnitVector();
this.u = up.Cross(w).ToUnitVector();
this.v = w.Cross(u);
this.lowerLeftCorner = this.origin - halfWidth * focusDist * u - halfHeight * focusDist * v - focusDist * w;
this.horizontal = 2.0 * halfWidth * focusDist * u;
this.vertical = 2.0 * halfHeight * focusDist * v;
}
public void RenderScene()
{
int nx = 800;
int ny = 400;
int ns = 50;
Random rng = new Random();
UnitCircleUniformSampler circleSampler = new UnitCircleUniformSampler(rng);
HitableList world = this.GenerateWorld(rng);
Console.WriteLine("Generated the world");
Vector3 lookFrom = new Vector3(8, 2, 1.5);
Vector3 lookAt = new Vector3(0, 0.0, 0);
Camera camera = new Camera(
circleSampler,
lookFrom,
lookAt,
new Vector3(0, 1, 0),
45.0 * Math.PI / 180.0,
(double)nx / (double)ny,
0.005,
(lookAt - lookFrom).Length());
Random random = new Random();
// Create folder to output frames
if (!Directory.Exists("RandomMarbles"))
{
Directory.CreateDirectory("RandomMarbles");
}
Sensor sensor = new Sensor(nx, ny, new SqrtColorSpace(), RGBColor.Black);
int frameNum = 0;
for (int s = 0; s < ns; ++s)
{
for (int j = ny - 1; j >= 0; --j)
{
for (int i = 0; i < nx; i++)
{
double u = (i + random.NextDouble()) / nx;
double v = (j + random.NextDouble()) / ny;
Ray3 r = new Ray3(camera.GetRay(u, v));
Vector3 color = Program.Color(r, world, 0);
sensor.AddSample(i, j, new RGBColor(color[0], color[1], color[2]));
}
}
if (s % (ns / 10) == 0)
{
// Output 1 frame with current number of samples
sensor.WritePNGFile($"RandomMarbles\\frame_{frameNum}.png").Wait();
frameNum++;
}
Console.Write("\r{0}", s);
}
sensor.WritePNGFile("RandomMarbles.png").Wait();
}
public void RenderScene()
{
int nx = 800;
int ny = 400;
int ns = 100;
var lowerLeftCorner = new Vector3(-2.0, -1.0, -1.0);
var horizontal = new Vector3(4.0, 0.0, 0.0);
var vertical = new Vector3(0.0, 2.0, 0.0);
var origin = new Vector3(0.0, 0.0, 0.0);
Random rng = new Random();
UnitSphereUniformSampler sphereSampler = new UnitSphereUniformSampler(rng);
UnitCircleUniformSampler circleSampler = new UnitCircleUniformSampler(rng);
IMaterial mat1 = new Lambertian(new Vector3(0.1, 0.2, 0.5), sphereSampler);
IMaterial mat2 = new Lambertian(new Vector3(0.8, 0.8, 0.0), sphereSampler);
IMaterial mat3 = new Metal(new Vector3(0.8, 0.6, 0.2), 0.3, sphereSampler);
IMaterial mat4 = new Dielectric(1.5, rng);
List <IHitable> objects = new List <IHitable>(4);
objects.Add(new Sphere(new Vector3(0, 0, -1), 0.5, mat1));
objects.Add(new Sphere(new Vector3(0, -100.5, -1), 100, mat2));
objects.Add(new Sphere(new Vector3(1, 0, -1), 0.5, mat3));
objects.Add(new Sphere(new Vector3(-1, 0, -1), 0.5, mat4));
objects.Add(new Sphere(new Vector3(-1, 0, -1), -0.45, mat4));
HitableList world = new HitableList(objects);
Vector3 lookFrom = new Vector3(-2, 2, 1);
Vector3 lookAt = new Vector3(0, 0, -1);
Camera camera = new Camera(
circleSampler,
lookFrom,
lookAt,
new Vector3(0, 1, 0),
90.0 * Math.PI / 180.0,
(double)nx / (double)ny,
0.2,
(lookAt - lookFrom).Length());
Random random = new Random();
// Create folder to output frames
if (!Directory.Exists("ThreeSpheres"))
{
Directory.CreateDirectory("ThreeSpheres");
}
Sensor sensor = new Sensor(nx, ny, new SqrtColorSpace(), RGBColor.Black);
int frameNum = 0;
for (int s = 0; s < ns; ++s)
{
for (int j = ny - 1; j >= 0; --j)
{
for (int i = 0; i < nx; i++)
{
double u = (i + random.NextDouble()) / nx;
double v = (j + random.NextDouble()) / ny;
Ray3 r = new Ray3(camera.GetRay(u, v));
Vector3 color = Program.Color(r, world, 0);
sensor.AddSample(i, j, new RGBColor(color[0], color[1], color[2]));
}
}
if (s % (ns / 10) == 0)
{
// Output 1 frame with current number of samples
sensor.WritePPMFile($"ThreeSpheres\\frame_{frameNum}.ppm").Wait();
frameNum++;
}
Console.Write("\r{0}", s);
}
sensor.WritePPMFile("finalOutput.ppm").Wait();
}
