def create_diffuse_area_light(light2world: Transform, paramSet: ParamSet, shape: Shape):
L = paramSet.find_spectrum("L", Spectrum(1.0))
sc = paramSet.find_spectrum("scale", Spectrum(1.0))
nSamples = paramSet.find_int("nsamples", 1)
# if renderOptions.quickRender:
# nSamples = max(1, nSamples / 4)
return DiffuseAreaLight(light2world, L * sc, nSamples, shape)
def create_spotLight(paramSet: ParamSet, light2world: Transform) -> PointLight:
from maths.matrix44 import Matrix44
from maths.vector4d import Vector4d
I = paramSet.find_spectrum("I", Spectrum(1.0))
sc = paramSet.find_spectrum("scale", Spectrum(1.0))
coneangle = paramSet.find_float("coneangle", 30.0)
conedelta = paramSet.find_float("conedeltaangle", 5.0)
# Compute spotlight world to light transformation
frome = paramSet.find_point("from", Point3d(0.0, 0.0, 0.0))
to = paramSet.find_point("to", Point3d(0.0, 0.0, 1.0))
direction = (to - frome).get_normalized()
du, dv = Transform.create_coordinateSystem(dir)
m = Matrix44.create_from_vector4d(
Vector4d(du.x, du.y, du.z, 0.0),
Vector4d(dv.x, dv.y, dv.z, 0.0),
Vector4d(direction.x, direction.y, direction.z, 0.0),
Vector4d(0.0, 0.0, 0.0, 1.0))
dirToZ = Transform(m)
light2world = light2world * Transform.create_translate(frome.ex, frome.ey, frome.ez) * dirToZ.get_invert()
return SpotLight(light2world, I * sc, coneangle, coneangle - conedelta)
def create_projection_light(paramSet: ParamSet, light2world: Transform) -> PointLight:
I = paramSet.find_spectrum("I", Spectrum(1.0))
sc = paramSet.find_spectrum("scale", Spectrum(1.0))
fov = paramSet.find_float("fov", 45.)
texname = paramSet.find_filename("mapname", "")
return ProjectionLight(light2world, I * sc, texname, fov)
def create_light_point(paramSet: ParamSet, light2world: Transform) -> PointLight:
I = paramSet.find_spectrum("I", Spectrum(1.0))
sc = paramSet.find_spectrum("scale", Spectrum(1.0))
P = paramSet.find_point("from", Point3d(0.0, 0.0, 0.0))
l2w = Transform.create_translate(P.x, P.y, P.z) * light2world
return PointLight(l2w, I * sc)