public static Filter MakeFilter(string name, ParamSet parameters)
{
switch (name)
{
case "mitchell":
{
var xWidth = parameters.FindSingle("xwidth", 2.0f);
var yWidth = parameters.FindSingle("ywidth", 2.0f);
var b = parameters.FindSingle("B", 1.0f / 3.0f);
var c = parameters.FindSingle("C", 1.0f / 3.0f);
return(new MitchellFilter(xWidth, yWidth, b, c));
}
default:
throw new ArgumentException("Unknown filter: " + name);
}
}
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);
}
}
public static VolumeIntegrator MakeVolumeIntegrator(string name, ParamSet parameters)
{
switch (name)
{
case "emission":
{
var stepSize = parameters.FindSingle("stepsize", 1.0f);
return(new EmissionIntegrator(stepSize));
}
default:
throw new ArgumentException("Unknown volume integrator: " + name);
}
}
public Texture <float> GetFloatTexture(string n, float defaultValue)
{
var name = _geomParams.FindTexture(n);
if (string.IsNullOrEmpty(name))
{
name = _materialParams.FindTexture(n);
}
if (!string.IsNullOrEmpty(name))
{
if (_floatTextures.ContainsKey(name))
{
return(_floatTextures[name]);
}
throw new InvalidOperationException(string.Format("Couldn't find float texture named '{0}' for parameter '{1}'", name, n));
}
var value = _geomParams.FindSingle(n, _materialParams.FindSingle(n, defaultValue));
return(new ConstantTexture <float>(value));
}
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);
}
}
public static VolumeIntegrator MakeVolumeIntegrator(string name, ParamSet parameters)
{
switch (name)
{
case "emission":
{
var stepSize = parameters.FindSingle("stepsize", 1.0f);
return new EmissionIntegrator(stepSize);
}
default:
throw new ArgumentException("Unknown volume integrator: " + name);
}
}
public static Shape MakeShape(string name, Transform objectToWorld,
bool reverseOrientation, ParamSet parameters)
{
switch (name)
{
case "cylinder":
{
var radius = parameters.FindSingle("radius", 1.0f);
var zMin = parameters.FindSingle("zmin", -1);
var zMax = parameters.FindSingle("zmax", 1);
var phiMax = parameters.FindSingle("phimax", 360.0f);
return new Cylinder(objectToWorld, reverseOrientation,
radius, zMin, zMax, phiMax);
}
case "disk" :
{
var height = parameters.FindSingle("height", 0.0f);
var radius = parameters.FindSingle("radius", 1.0f);
var innerRadius = parameters.FindSingle("innerradius", 0.0f);
var phiMax = parameters.FindSingle("phimax", 360.0f);
return new Disk(objectToWorld, reverseOrientation,
height, radius, innerRadius, phiMax);
}
case "sphere":
{
var radius = parameters.FindSingle("radius", 1.0f);
var zMin = parameters.FindSingle("zmin", -radius);
var zMax = parameters.FindSingle("zmax", radius);
var phiMax = parameters.FindSingle("phimax", 360.0f);
return new Sphere(objectToWorld, reverseOrientation, radius,
zMin, zMax, phiMax);
}
default:
throw new ArgumentException("Unknown shape: " + name);
}
}
public static Filter MakeFilter(string name, ParamSet parameters)
{
switch (name)
{
case "mitchell" :
{
var xWidth = parameters.FindSingle("xwidth", 2.0f);
var yWidth = parameters.FindSingle("ywidth", 2.0f);
var b = parameters.FindSingle("B", 1.0f / 3.0f);
var c = parameters.FindSingle("C", 1.0f / 3.0f);
return new MitchellFilter(xWidth, yWidth, b, c);
}
default :
throw new ArgumentException("Unknown filter: " + name);
}
}
public static Shape MakeShape(string name, Transform objectToWorld,
bool reverseOrientation, ParamSet parameters)
{
switch (name)
{
case "cylinder":
{
var radius = parameters.FindSingle("radius", 1.0f);
var zMin = parameters.FindSingle("zmin", -1);
var zMax = parameters.FindSingle("zmax", 1);
var phiMax = parameters.FindSingle("phimax", 360.0f);
return(new Cylinder(objectToWorld, reverseOrientation,
radius, zMin, zMax, phiMax));
}
case "disk":
{
var height = parameters.FindSingle("height", 0.0f);
var radius = parameters.FindSingle("radius", 1.0f);
var innerRadius = parameters.FindSingle("innerradius", 0.0f);
var phiMax = parameters.FindSingle("phimax", 360.0f);
return(new Disk(objectToWorld, reverseOrientation,
height, radius, innerRadius, phiMax));
}
case "sphere":
{
var radius = parameters.FindSingle("radius", 1.0f);
var zMin = parameters.FindSingle("zmin", -radius);
var zMax = parameters.FindSingle("zmax", radius);
var phiMax = parameters.FindSingle("phimax", 360.0f);
return(new Sphere(objectToWorld, reverseOrientation, radius,
zMin, zMax, phiMax));
}
default:
throw new ArgumentException("Unknown shape: " + name);
}
}
public float FindSingle(string name, float defaultValue)
{
return(_geomParams.FindSingle(name, defaultValue));
}
