public override Scene CreateScene(Film film)
{
var camera = new PerspectiveCamera(film,
1.0f, 100.0f, Vector3D.Forward, Vector3D.Up,
new Point3D(0, 0, 15), MathUtility.PI_OVER_4);
var surfaceIntegrator = new WhittedIntegrator(6);
var sampler = new RegularSampler(
new IntPoint2D(0, 0),
new IntPoint2D(film.XRes, film.YRes));
var shape = new Aether.Shapes.Sphere(new TranslateTransform(), 5);
var material = new MatteMaterial(ColorsF.Red);
var primitive = new GeometricPrimitive(shape, material);
var lights = new List<Light>
{
// new PointLight(
// new TranslateTransform { OffsetX = 10, OffsetY = 10, OffsetZ = 10},
// new ColorF(0.5f))
new DirectionalLight(new RotateTransform3D(), Vector3D.Down, new ColorF(0.5f))
};
return new Scene(camera, surfaceIntegrator, sampler, primitive,
lights);
}
public static Camera MakeCamera(string name, ParamSet parameters,
TransformSet cameraToWorldSet, float transformStart, float transformEnd,
Film film)
{
var animatedCameraToWorld = new AnimatedTransform(
cameraToWorldSet[0], transformStart,
cameraToWorldSet[1], transformEnd);
switch (name)
{
case "perspective" :
{
var shutterOpen = parameters.FindSingle("shutteropen", 0.0f);
var shutterClose = parameters.FindSingle("shutterclose", 1.0f);
if (shutterOpen < shutterClose)
MathUtility.Swap(ref shutterOpen, ref shutterClose);
var lensRadius = parameters.FindSingle("lensradius", 0.0f);
var focalDistance = parameters.FindSingle("focaldistance", 1e30f);
var frame = parameters.FindSingle("frameaspectratio", film.XResolution / (float) film.YResolution);
var screenWindow = parameters.FindSingleList("screenwindow");
if (screenWindow.Length != 4)
screenWindow = (frame > 1.0f)
? new[] { -frame, frame, -1, 1 }
: new[] { -1, 1, -1 / frame, 1 / frame };
var fieldOfView = parameters.FindSingle("fov", 90.0f);
return new PerspectiveCamera(animatedCameraToWorld, screenWindow, shutterOpen, shutterClose,
lensRadius, focalDistance, fieldOfView, film);
}
default :
throw new ArgumentException("Unknown camera: " + name);
}
}
protected Camera(AnimatedTransform cameraToWorld,
float shutterOpen, float shutterClose,
Film film)
{
_cameraToWorld = cameraToWorld;
_shutterOpen = shutterOpen;
_shutterClose = shutterClose;
_film = film;
}
public PerspectiveCamera(
AnimatedTransform cameraToWorld, float[] screenWindow,
float shutterOpen, float shutterClose,
float lensRadius, float focalDistance,
float fieldOfView,
Film film)
: base(cameraToWorld, Transform.Perspective(fieldOfView, 1e-2f, 1000.0f), screenWindow, shutterOpen, shutterClose, lensRadius, focalDistance, film)
{
// Compute differential changes in origin for perspective camera rays
_dxCamera = RasterToCamera.TransformPoint(new Point(1, 0, 0)) - RasterToCamera.TransformPoint(new Point(0, 0, 0));
_dyCamera = RasterToCamera.TransformPoint(new Point(0, 1, 0)) - RasterToCamera.TransformPoint(new Point(0, 0, 0));
}
protected ProjectiveCamera(AnimatedTransform cameraToWorld, Transform cameraToScreen,
float[] screenWindow, float shutterOpen, float shutterClose,
float lensRadius, float focalDistance, Film film)
: base(cameraToWorld, shutterOpen, shutterClose, film)
{
_cameraToScreen = cameraToScreen;
_lensRadius = lensRadius;
_focalDistance = focalDistance;
// Compute projective camera screen transformations
_screenToRaster = Transform.Scale(film.XResolution, film.YResolution, 1.0f)
* Transform.Scale(1.0f / (screenWindow[1] - screenWindow[0]), 1.0f / (screenWindow[2] - screenWindow[3]), 1.0f)
* Transform.Translate(new Vector(-screenWindow[0], -screenWindow[3], 0.0f));
_rasterToScreen = Transform.Invert(_screenToRaster);
_rasterToCamera = Transform.Invert(_cameraToScreen) * _rasterToScreen;
}
public static Sampler MakeSampler(string name, ParamSet parameters, Film film, Camera camera)
{
switch (name)
{
case "stratified":
{
var jitter = parameters.FindBoolean("jitter", true);
var xSamples = parameters.FindInt32("xsamples", 2);
var ySamples = parameters.FindInt32("ysamples", 2);
var sampleExtent = film.SampleExtent;
return new StratifiedSampler(sampleExtent, xSamples, ySamples, jitter,
camera.ShutterOpen, camera.ShutterClose);
}
default:
throw new ArgumentException("Unknown sampler: " + name);
}
}
public abstract Scene CreateScene(Film film);
