def wrangle_camera(obj, wrangler, now):
node = wrangle_node_parm(obj, 'camera_node', now)
if node is not None:
output_cam_xform(obj, node.directive_type, now)
return node.type_and_paramset
paramset = ParamSet()
window = obj.getCameraScreenWindow(wrangler, now)
parm_selection = {
'projection' : SohoPBRT('projection', 'string', ['perspective'], False),
'focal' : SohoPBRT('focal', 'float', [50], False),
'focalunits' : SohoPBRT('focalunits', 'string', ['mm'], False),
'aperture' : SohoPBRT('aperture', 'float', [41.4214], False),
'orthowidth' : SohoPBRT('orthowidth', 'float', [2], False),
'res' : SohoPBRT('res', 'integer', [1280, 720], False),
'aspect' : SohoPBRT('aspect', 'float', [1], False),
'fstop' : SohoPBRT('fstop', 'float', [5.6], False),
'focaldistance' : SohoPBRT('focus', 'float', [5], False, key='focaldistance'),
'pbrt_dof' : SohoPBRT('pbrt_dof', 'integer', [0], False),
}
parms = obj.evaluate(parm_selection, now)
aspect = parms['aspect'].Value[0]
aspectfix = aspect * float(parms['res'].Value[0]) / float(parms['res'].Value[1])
projection = parms['projection'].Value[0]
if parms['pbrt_dof'].Value[0]:
paramset.add(parms['focaldistance'].to_pbrt())
# to convert from f-stop to lens radius
# FStop = FocalLength / (Radius * 2)
# Radius = FocalLength/(FStop * 2)
focal = parms['focal'].Value[0]
fstop = parms['fstop'].Value[0]
units = parms['focalunits'].Value[0]
focal = soho.houdiniUnitLength(focal, units)
lens_radius = focal/(fstop*2.0)
paramset.add(PBRTParam('float', 'lensradius', lens_radius))
if projection == 'perspective':
projection_name = 'perspective'
focal = parms['focal'].Value[0]
aperture = parms['aperture'].Value[0]
fov = 2.0 * focal / aperture
fov = 2.0 * math.degrees(math.atan2(1.0, fov))
paramset.add(PBRTParam('float', 'fov', [fov]))
screen = [(window[0] - 0.5) * 2.0,
(window[1] - 0.5) * 2.0,
(window[2] - 0.5) * 2.0 / aspectfix,
(window[3] - 0.5) * 2.0 / aspectfix]
paramset.add(PBRTParam('float', 'screenwindow', screen))
elif projection == 'ortho':
projection_name = 'orthographic'
width = parms['orthowidth'].Value[0]
screen = [(window[0] - 0.5) * width,
(window[1] - 0.5) * width,
(window[2] - 0.5) * width / aspectfix,
(window[3] - 0.5) * width / aspectfix]
paramset.add(PBRTParam('float', 'screenwindow', screen))
elif projection == 'sphere':
projection_name = 'environment'
else:
soho.error('Camera projection setting of %s not supported by PBRT' %
projection)
output_cam_xform(obj, projection_name, now)
return (projection_name, paramset)
def wrangle_camera(obj, wrangler, now):
node = wrangle_node_parm(obj, "camera_node", now)
if node is not None:
output_cam_xform(obj, node.directive_type, now)
return node.type_and_paramset
paramset = ParamSet()
window = obj.getCameraScreenWindow(wrangler, now)
parm_selection = {
"projection": SohoPBRT("projection", "string", ["perspective"], False),
"focal": SohoPBRT("focal", "float", [50], False),
"focalunits": SohoPBRT("focalunits", "string", ["mm"], False),
"aperture": SohoPBRT("aperture", "float", [41.4214], False),
"orthowidth": SohoPBRT("orthowidth", "float", [2], False),
"res": SohoPBRT("res", "integer", [1280, 720], False),
"aspect": SohoPBRT("aspect", "float", [1], False),
"fstop": SohoPBRT("fstop", "float", [5.6], False),
"focaldistance": SohoPBRT("focus", "float", [5], False, key="focaldistance"),
"pbrt_dof": SohoPBRT("pbrt_dof", "integer", [0], False),
}
parms = obj.evaluate(parm_selection, now)
aspect = parms["aspect"].Value[0]
aspectfix = aspect * float(parms["res"].Value[0]) / float(parms["res"].Value[1])
projection = parms["projection"].Value[0]
if parms["pbrt_dof"].Value[0]:
paramset.add(parms["focaldistance"].to_pbrt())
# to convert from f-stop to lens radius
# FStop = FocalLength / (Radius * 2)
# Radius = FocalLength/(FStop * 2)
focal = parms["focal"].Value[0]
fstop = parms["fstop"].Value[0]
units = parms["focalunits"].Value[0]
focal = soho.houdiniUnitLength(focal, units)
lens_radius = focal / (fstop * 2.0)
paramset.add(PBRTParam("float", "lensradius", lens_radius))
if projection == "perspective":
projection_name = "perspective"
focal = parms["focal"].Value[0]
aperture = parms["aperture"].Value[0]
fov = 2.0 * focal / aperture
fov = 2.0 * math.degrees(math.atan2(1.0, fov))
paramset.add(PBRTParam("float", "fov", [fov]))
screen = [
(window[0] - 0.5) * 2.0,
(window[1] - 0.5) * 2.0,
(window[2] - 0.5) * 2.0 / aspectfix,
(window[3] - 0.5) * 2.0 / aspectfix,
]
paramset.add(PBRTParam("float", "screenwindow", screen))
elif projection == "ortho":
projection_name = "orthographic"
width = parms["orthowidth"].Value[0]
screen = [
(window[0] - 0.5) * width,
(window[1] - 0.5) * width,
(window[2] - 0.5) * width / aspectfix,
(window[3] - 0.5) * width / aspectfix,
]
paramset.add(PBRTParam("float", "screenwindow", screen))
elif projection == "sphere":
projection_name = "environment"
else:
soho.error("Camera projection setting of %s not supported by PBRT" % projection)
output_cam_xform(obj, projection_name, now)
return (projection_name, paramset)