public static Camera Create(ParamSet paramSet, AnimatedTransform cam2World, Film film, Medium medium)
{
// Extract common camera parameters from _ParamSet_
double shutteropen = paramSet.FindOneFloat("shutteropen", 0.0);
double shutterclose = paramSet.FindOneFloat("shutterclose", 1.0);
if (shutterclose < shutteropen)
{
//Warning("Shutter close time [%f] < shutter open [%f]. Swapping them.",
// shutterclose, shutteropen);
PbrtMath.Swap(ref shutterclose, ref shutteropen);
}
double lensradius = paramSet.FindOneFloat("lensradius", 0.0);
double focaldistance = paramSet.FindOneFloat("focaldistance", 1e6);
double frame = paramSet.FindOneFloat(
"frameaspectratio",
Convert.ToDouble(film.FullResolution.X) / Convert.ToDouble(film.FullResolution.Y));
Bounds2D screen;
if (frame > 1.0)
{
screen = new Bounds2D(new Point2D(-frame, -1.0), new Point2D(frame, 1.0));
}
else
{
screen = new Bounds2D(new Point2D(-1.0, -1.0 / frame), new Point2D(1.0, 1.0 / frame));
}
double[] sw = paramSet.FindFloat("screenwindow");
if (sw != null)
{
if (sw.Length == 4)
{
screen = new Bounds2D(new Point2D(sw[0], sw[2]), new Point2D(sw[1], sw[3]));
}
else
{
//Error("\"screenwindow\" should have four values");
}
}
double fov = paramSet.FindOneFloat("fov", 90.0);
double halffov = paramSet.FindOneFloat("halffov", -1.0);
if (halffov > 0.0)
{
// hack for structure synth, which exports half of the full fov
fov = 2.0 * halffov;
}
return(new PerspectiveCamera(cam2World, screen, shutteropen, shutterclose,
lensradius, focaldistance, fov, film, medium));
}