def wrangle_sampler(obj, wrangler, now):
node = wrangle_node_parm(obj, "sampler_node", now)
if node is not None:
return node.type_and_paramset
parm_selection = {
"sampler": SohoPBRT("sampler", "string", ["halton"], False),
"pixelsamples": SohoPBRT("pixelsamples", "integer", [16], False),
"jitter": SohoPBRT("jitter", "bool", [1], False),
"samples": SohoPBRT("samples", "integer", [4, 4], False),
"dimensions": SohoPBRT("dimensions", "integer", [4], False),
}
parms = obj.evaluate(parm_selection, now)
sampler_name = parms["sampler"].Value[0]
paramset = ParamSet()
if sampler_name == "stratified":
xsamples = parms["samples"].Value[0]
ysamples = parms["samples"].Value[1]
paramset.add(PBRTParam("integer", "xsamples", xsamples))
paramset.add(PBRTParam("integer", "ysamples", ysamples))
paramset.add(parms["jitter"].to_pbrt())
paramset.add(parms["dimensions"].to_pbrt())
else:
paramset.add(parms["pixelsamples"].to_pbrt())
return (sampler_name, paramset)
def wrangle_sampler(obj, wrangler, now):
node = wrangle_node_parm(obj, "sampler_node", now)
if node is not None:
return node.type_and_paramset
parm_selection = {
"sampler": SohoPBRT("sampler", "string", ["pmj02bn"], False),
"pixelsamples": SohoPBRT("pixelsamples", "integer", [16], False),
"randomization": SohoPBRT("randomization", "string", ["fastowen"],
True),
"jitter": SohoPBRT("jitter", "bool", [1], True),
"samples": SohoPBRT("samples", "integer", [4, 4], False),
}
parms = obj.evaluate(parm_selection, now)
sampler_name = parms["sampler"].Value[0]
paramset = ParamSet()
if sampler_name == "stratified":
xsamples = parms["samples"].Value[0]
ysamples = parms["samples"].Value[1]
paramset.add(PBRTParam("integer", "xsamples", xsamples))
paramset.add(PBRTParam("integer", "ysamples", ysamples))
if "jitter" in parms:
paramset.add(parms["jitter"].to_pbrt())
else:
if (sampler_name in ("sobol", "paddedsobol", "zsobol", "halton")
and "randomization" in parms):
# NOTE: If the halton sampler is picked, it is not compatible with the
# randomization "fastowen".
paramset.add(parms["randomization"].to_pbrt())
paramset.add(parms["pixelsamples"].to_pbrt())
return (sampler_name, paramset)
def wrangle_film(obj, wrangler, now):
node = wrangle_node_parm(obj, 'film_node', now)
if node is not None:
return node.type_and_paramset
paramset = ParamSet()
parm_selection = {
'filename' : SohoPBRT('filename', 'string', ['pbrt.exr'], False),
'maxsampleluminance' : SohoPBRT('maxsampleluminance', 'float', [1e38], True),
'diagonal' : SohoPBRT('diagonal', 'float', [35], True),
}
parms = obj.evaluate(parm_selection, now)
for parm_name, parm in parms.iteritems():
paramset.add(parm.to_pbrt())
parm_selection = {
'res' : SohoPBRT('res', 'integer', [1280, 720], False),
}
parms = obj.evaluate(parm_selection, now)
paramset.add(PBRTParam('integer', 'xresolution', parms['res'].Value[0]))
paramset.add(PBRTParam('integer', 'yresolution', parms['res'].Value[1]))
crop_region = obj.getCameraCropWindow(wrangler, now)
if crop_region != [0.0, 1.0, 0.0, 1.0]:
paramset.add(PBRTParam('float', 'cropwindow', crop_region))
return ('image', paramset)
def wrangle_sampler(obj, wrangler, now):
node = wrangle_node_parm(obj, 'sampler_node', now)
if node is not None:
return node.type_and_paramset
parm_selection = {
'sampler' : SohoPBRT('sampler', 'string', ['halton'], False),
'pixelsamples' : SohoPBRT('pixelsamples', 'integer', [16], False),
'jitter' : SohoPBRT('jitter', 'bool', [1], False),
'samples' : SohoPBRT('samples', 'integer', [4, 4], False),
'dimensions' : SohoPBRT('dimensions', 'integer', [4], False),
}
parms = obj.evaluate(parm_selection, now)
sampler_name = parms['sampler'].Value[0]
paramset = ParamSet()
if sampler_name == 'stratified':
xsamples = parms['samples'].Value[0]
ysamples = parms['samples'].Value[1]
paramset.add(PBRTParam('integer', 'xsamples', xsamples))
paramset.add(PBRTParam('integer', 'ysamples', ysamples))
paramset.add(parms['jitter'].to_pbrt())
paramset.add(parms['dimensions'].to_pbrt())
else:
paramset.add(parms['pixelsamples'].to_pbrt())
return (sampler_name, paramset)
def wrangle_film(obj, wrangler, now):
node = wrangle_node_parm(obj, "film_node", now)
if node is not None:
return node.type_and_paramset
paramset = ParamSet()
parm_selection = {
"filename": SohoPBRT("filename", "string", ["pbrt.exr"], False),
"maxsampleluminance": SohoPBRT("maxsampleluminance", "float", [1e38], True),
"diagonal": SohoPBRT("diagonal", "float", [35], True),
}
parms = obj.evaluate(parm_selection, now)
for parm_name, parm in parms.iteritems():
paramset.add(parm.to_pbrt())
parm_selection = {"res": SohoPBRT("res", "integer", [1280, 720], False)}
parms = obj.evaluate(parm_selection, now)
paramset.add(PBRTParam("integer", "xresolution", parms["res"].Value[0]))
paramset.add(PBRTParam("integer", "yresolution", parms["res"].Value[1]))
crop_region = obj.getCameraCropWindow(wrangler, now)
if crop_region != [0.0, 1.0, 0.0, 1.0]:
paramset.add(PBRTParam("float", "cropwindow", crop_region))
return ("image", paramset)
def wrangle_accelerator(obj, wrangler, now):
node = wrangle_node_parm(obj, "accelerator_node", now)
if node is not None:
return node.type_and_paramset
parm_selection = {"accelerator": SohoPBRT("accelerator", "string", ["bvh"], False)}
parms = obj.evaluate(parm_selection, now)
accelerator_name = parms["accelerator"].Value[0]
if accelerator_name == "bvh":
parm_selection = {
"maxnodeprims": SohoPBRT("maxnodeprims", "integer", [4], True),
"splitmethod": SohoPBRT("splitmethod", "string", ["sah"], True),
}
else:
parm_selection = {
"intersectcost": SohoPBRT("intersectcost", "integer", [80], True),
"traversalcostcost": SohoPBRT("traversalcost", "integer", [1], True),
"emptybonus": SohoPBRT("emptybonus", "float", [0.2], True),
"maxprims": SohoPBRT("maxprims", "integer", [1], True),
"kdtree_maxdepth": SohoPBRT(
"kdtree_maxdepth", "integer", [1], True, key="maxdepth"
),
}
parms = obj.evaluate(parm_selection, now)
paramset = ParamSet()
for parm in parms:
paramset.add(parms[parm].to_pbrt())
return (accelerator_name, paramset)
def wrangle_film(obj, wrangler, now):
node = wrangle_node_parm(obj, "film_node", now)
if node is not None:
return node.type_and_paramset
paramset = ParamSet()
parm_selection = {
"filename": SohoPBRT("filename", "string", ["pbrt.exr"], False),
"maxcomponentvalue": SohoPBRT("maxcomponentvalue", "float", [1e38],
True),
"diagonal": SohoPBRT("diagonal", "float", [35], True),
"savefp16": SohoPBRT("savefp16", "bool", [1], True),
}
parms = obj.evaluate(parm_selection, now)
for parm in parms.values():
paramset.add(parm.to_pbrt())
parm_selection = {
"film": SohoPBRT("film", "string", ["rgb"], False),
"res": SohoPBRT("res", "integer", [1280, 720], False),
}
parms = obj.evaluate(parm_selection, now)
film_name = parms["film"].Value[0]
paramset.add(PBRTParam("integer", "xresolution", parms["res"].Value[0]))
paramset.add(PBRTParam("integer", "yresolution", parms["res"].Value[1]))
crop_region = obj.getCameraCropWindow(wrangler, now)
if crop_region != [0.0, 1.0, 0.0, 1.0]:
paramset.add(PBRTParam("float", "cropwindow", crop_region))
parm_selection = {
"iso": SohoPBRT("iso", "float", [100], True),
"whitebalance": SohoPBRT("whitebalance", "float", [0], True),
"sensor": SohoPBRT("sensor", "string", ["cie1931"], True),
}
if film_name == "spectral":
parm_selection["buckets"] = SohoPBRT("buckets", "integer", [16], True)
parms = obj.evaluate(parm_selection, now)
for parm in parms.values():
paramset.add(parm.to_pbrt())
return (film_name, paramset)
def wrangle_node_parm(obj, parm_name, now):
parm_selection = {parm_name: SohoPBRT(parm_name, "string", [""], False)}
parms = obj.evaluate(parm_selection, now)
if not parms:
return None
node_path = parms[parm_name].Value[0]
if not node_path:
return None
return BaseNode(node_path)
def wrangle_filter(obj, wrangler, now):
node = wrangle_node_parm(obj, 'filter_node', now)
if node is not None:
return node.type_and_paramset
parm_selection = {
'filter' : SohoPBRT('filter', 'string', ['gaussian'], False),
'filter_width' : SohoPBRT('filter_width', 'float', [2.0, 2.0], False),
'alpha' : SohoPBRT('gauss_alpha', 'float', [2.0], True, key='alpha'),
'B' : SohoPBRT('mitchell_B', 'float', [0.333333], True, key='B'),
'C' : SohoPBRT('mitchell_C', 'float', [0.333333], True, key='C'),
'tau' : SohoPBRT('sinc_tau', 'float', [3], True, key='tau'),
}
parms = obj.evaluate(parm_selection, now)
filter_name = parms['filter'].Value[0]
paramset = ParamSet()
xwidth = parms['filter_width'].Value[0]
ywidth = parms['filter_width'].Value[1]
paramset.add(PBRTParam('float', 'xwidth', xwidth))
paramset.add(PBRTParam('float', 'ywidth', ywidth))
if filter_name == 'gaussian' and 'alpha' in parms:
paramset.add(parms['alpha'].to_pbrt())
if filter_name == 'mitchell' and 'mitchell_B' in parms:
paramset.add(parms['B'].to_pbrt())
if filter_name == 'mitchell' and 'mitchell_C' in parms:
paramset.add(parms['C'].to_pbrt())
if filter_name == 'sinc' and 'tau' in parms:
paramset.add(parms['tau'].to_pbrt())
return (filter_name, paramset)
def wrangle_filter(obj, wrangler, now):
node = wrangle_node_parm(obj, "filter_node", now)
if node is not None:
return node.type_and_paramset
parm_selection = {
"filter": SohoPBRT("filter", "string", ["gaussian"], False),
"filter_width": SohoPBRT("filter_width", "float", [2.0, 2.0], False),
"alpha": SohoPBRT("gauss_alpha", "float", [2.0], True, key="alpha"),
"B": SohoPBRT("mitchell_B", "float", [0.333333], True, key="B"),
"C": SohoPBRT("mitchell_C", "float", [0.333333], True, key="C"),
"tau": SohoPBRT("sinc_tau", "float", [3], True, key="tau"),
}
parms = obj.evaluate(parm_selection, now)
filter_name = parms["filter"].Value[0]
paramset = ParamSet()
xwidth = parms["filter_width"].Value[0]
ywidth = parms["filter_width"].Value[1]
paramset.add(PBRTParam("float", "xwidth", xwidth))
paramset.add(PBRTParam("float", "ywidth", ywidth))
if filter_name == "gaussian" and "alpha" in parms:
paramset.add(parms["alpha"].to_pbrt())
if filter_name == "mitchell" and "B" in parms:
paramset.add(parms["B"].to_pbrt())
if filter_name == "mitchell" and "C" in parms:
paramset.add(parms["C"].to_pbrt())
if filter_name == "sinc" and "tau" in parms:
paramset.add(parms["tau"].to_pbrt())
return (filter_name, paramset)
def wrangle_accelerator(obj, wrangler, now):
node = wrangle_node_parm(obj, 'accelerator_node', now)
if node is not None:
return node.type_and_paramset
parm_selection = {
'accelerator' : SohoPBRT('accelerator', 'string', ['bvh'], False),
}
parms = obj.evaluate(parm_selection, now)
accelerator_name = parms['accelerator'].Value[0]
if accelerator_name == 'bvh':
parm_selection = {
'maxnodeprims' : SohoPBRT('maxnodeprims', 'integer', [4], True),
'splitmethod' : SohoPBRT('splitmethod', 'string', ['sah'], True),
}
else:
parm_selection = {
'intersectcost' :
SohoPBRT('intersectcost', 'integer', [80], True),
'traversalcostcost' :
SohoPBRT('traversalcost', 'integer', [1], True),
'emptybonus' :
SohoPBRT('emptybonus', 'float', [0.2], True),
'maxprims' :
SohoPBRT('maxprims', 'integer', [1], True),
'kdtree_maxdepth' :
SohoPBRT('kdtree_maxdepth', 'integer', [1], True,
key='maxdepth')
}
parms = obj.evaluate(parm_selection, now)
paramset = ParamSet()
for parm in parms:
paramset.add(parms[parm].to_pbrt())
return (accelerator_name, paramset)
def wrangle_geo(obj, wrangler, now):
parm_selection = {
'object:soppath' : SohoPBRT('object:soppath', 'string', [''], skipdefault=False),
# NOTE: In order for shop_materialpath to evaluate correctly when using (full) instancing
# shop_materialpath needs to be a 'shaderhandle' and not a 'string'
# TODO: However this does not seem to apply to shop_materialpaths on the instance points.
'shop_materialpath' : SohoPBRT('shop_materialpath', 'shaderhandle', skipdefault=False),
'pbrt_rendersubd' : SohoPBRT('pbrt_rendersubd', 'bool', [False], False),
'pbrt_subdlevels' : SohoPBRT('pbrt_subdlevels', 'integer', [3], False, key='levels'),
'pbrt_computeN' : SohoPBRT('pbrt_computeN', 'bool', [True], False),
# The combination of None as a default as well as ignore defaults being False is
# important. 'None' implying the parm is missing and not available, and '' meaning
# a vacuum medium.
# We can't ignore defaults since a default might be the only way to set a medium
# back to a vacuum.
'pbrt_interior' : SohoPBRT('pbrt_interior', 'string', [None], False),
'pbrt_exterior' : SohoPBRT('pbrt_exterior', 'string', [None], False),
'pbrt_ignorevolumes' : SohoPBRT('pbrt_ignorevolumes', 'bool', [False], True),
'pbrt_ignorematerials' : SohoPBRT('pbrt_ignorematerials', 'bool', [False], True),
'pbrt_splitdepth' : SohoPBRT('pbrt_splitdepth', 'integer', [3], True, key='splitdepth'),
# We don't use the key=type since its a bit too generic of a name
'pbrt_curvetype' : SohoPBRT('pbrt_curvetype', 'string', ['flat'], True),
'pbrt_include' : SohoPBRT('pbrt_include', 'string', [''], False),
'pbrt_alpha_texture' : SohoPBRT('pbrt_alpha_texture', 'string', [''],
skipdefault=False, key='alpha'),
'pbrt_shadowalpha_texture' : SohoPBRT('pbrt_shadowalpha_texture', 'string', [''],
skipdefault=False, key='shadowalpha'),
# TODO, Tesselation options?
}
properties = obj.evaluate(parm_selection, now)
if 'shop_materialpath' not in properties:
shop = ''
else:
shop = properties['shop_materialpath'].Value[0]
if shop and shop in scene_state.shading_nodes:
api.NamedMaterial(shop)
interior = None
exterior = None
if 'pbrt_interior' in properties:
interior = properties['pbrt_interior'].Value[0]
if 'pbrt_exterior' in properties:
exterior = properties['pbrt_exterior'].Value[0]
# We only output a MediumInterface if one or both of the parms exist
if interior is not None or exterior is not None:
interior = '' if interior is None else interior
exterior = '' if exterior is None else exterior
api.MediumInterface(interior, exterior)
for prop in ('alpha', 'shadowalpha'):
alpha_tex = properties[prop].Value[0]
alpha_node = BaseNode.from_node(alpha_tex)
if ( alpha_node and
alpha_node.directive == 'texture' and
alpha_node.output_type == 'float'):
if alpha_node.path not in scene_state.shading_nodes:
wrangle_shading_network(alpha_node.path, saved_nodes=set())
else:
# If the passed in alpha_texture wasn't valid, clear it so we don't add
# it to the geometry
if alpha_tex:
api.Comment('%s is an invalid float texture' % alpha_tex)
properties[prop].Value[0] = ''
if properties['pbrt_include'].Value[0]:
# If we have included a file, skip output any geo.
api.Include(properties['pbrt_include'].Value[0])
return
soppath = properties['object:soppath'].Value[0]
if not soppath:
api.Comment('Can not find soppath for object')
return
Geo.output_geo(soppath, now, properties)
return
def wrangle_light(light, wrangler, now):
# NOTE: Lights do not support motion blur so we disable it when
# outputs the xforms
node = wrangle_node_parm(light, 'light_node', now)
parm_selection = {
'light_wrangler' : SohoPBRT('light_wrangler', 'string', [''], False),
'light_color' : SohoPBRT('light_color', 'float', [1, 1, 1], False),
'light_intensity' : SohoPBRT('light_intensity', 'float', [1], False),
'light_exposure' : SohoPBRT('light_exposure', 'float', [0], False),
}
parms = light.evaluate(parm_selection, now)
light_wrangler = parms['light_wrangler'].Value[0]
paramset = ParamSet()
paramset.add(_to_light_scale(parms))
if light_wrangler == 'HoudiniEnvLight':
env_map = []
paramset.add(PBRTParam('rgb', 'L', parms['light_color'].Value))
if light.evalString('env_map', now, env_map):
paramset.add(PBRTParam('string', 'mapname', env_map))
output_xform(light, now, no_motionblur=True)
api.Scale(1, 1, -1)
api.Rotate(90, 0, 0, 1)
api.Rotate(90, 0, 1, 0)
_light_api_wrapper('infinite', paramset, node)
return
elif light_wrangler != 'HoudiniLight':
api.Comment('This light type, %s, is unsupported' % light_wrangler)
return
# We are dealing with a standard HoudiniLight type.
light_type = light.wrangleString(wrangler, 'light_type', now, ['point'])[0]
if light_type in ('sphere', 'disk', 'grid', 'tube', 'geo'):
single_sided = light.wrangleInt(wrangler, 'singlesided', now, [0])[0]
visible = light.wrangleInt(wrangler, 'light_contribprimary', now, [0])[0]
size = light.wrangleFloat(wrangler, 'areasize', now, [1, 1])
paramset.add(PBRTParam('rgb', 'L', parms['light_color'].Value))
paramset.add(PBRTParam('bool', 'twosided', [not single_sided]))
# TODO, Possibly get the xform's scale and scale the geo, not the light.
# (for example, further multiplying down the radius)
xform = get_transform(light, now)
xform_to_api_srt(xform, scale=False)
_light_api_wrapper('diffuse', paramset, node)
api.AttributeBegin()
# PBRT only supports uniform scales for non-mesh area lights
# this is in part due to explicit light's area scaling factor.
if light_type in ('grid', 'geo'):
api.Scale(size[0], size[1], size[0])
# The visibility only applies to hits on the non-emissive side of the light.
# the emissive side will still be rendered
if not visible:
api.Material('none')
if light_type == 'sphere':
# We apply the scale to the radius instead of using a api.Scale
api.Shape('sphere', [PBRTParam('float', 'radius', 0.5*size[0])])
elif light_type == 'tube':
api.Rotate(90, 0, 1, 0)
api.Shape('cylinder', [PBRTParam('float', 'radius', 0.075*size[1]),
PBRTParam('float', 'zmin', -0.5*size[0]),
PBRTParam('float', 'zmax', 0.5*size[0])])
elif light_type == 'disk':
# A bug was introduced with Issue #154 which requires a -z scale
# on disk area lights
# See issue #183
# api.Scale(1,1,-1)
api.Shape('disk', [PBRTParam('float', 'radius', 0.5*size[0])])
elif light_type == 'grid':
api.Shape('trianglemesh', [PBRTParam('integer', 'indices', [0, 3, 1,
0, 2, 3]),
PBRTParam('point', 'P', [-0.5, -0.5, 0,
0.5, -0.5, 0,
-0.5, 0.5, 0,
0.5, 0.5, 0])])
elif light_type == 'geo':
areageo_parm = hou.node(light.getName()).parm('areageometry')
if not areageo_parm:
api.Comment('No "areageometry" parm on light')
return
area_geo_node = areageo_parm.evalAsNode()
if not area_geo_node:
api.Comment('Skipping, no geometry object specified')
return
obj = soho.getObject(area_geo_node.path())
api.Comment('Light geo from %s' % obj.getName())
# TODO: The area light scale ('areasize') happens *after* the wrangle_obj's xform
# when 'intothisobject' is enabled.
into_this_obj = light.wrangleInt(wrangler, 'intothisobject', now, [0])[0]
ignore_xform = not into_this_obj
wrangle_obj(obj, None, now, ignore_xform=ignore_xform)
api.AttributeEnd()
return
cone_enable = light.wrangleInt(wrangler, 'coneenable', now, [0])[0]
projmap = light.wrangleString(wrangler, 'projmap', now, [''])[0]
areamap = light.wrangleString(wrangler, 'areamap', now, [''])[0]
api_calls = []
api_calls.append(_apiclosure(output_xform, light, now, no_motionblur=True))
api_calls.append(_apiclosure(api.Scale, 1, 1, -1))
api_calls.append(_apiclosure(api.Scale, 1, -1, 1))
if light_type == 'point':
paramset.add(PBRTParam('rgb', 'I', parms['light_color'].Value))
if areamap:
light_name = 'goniometric'
paramset.add(PBRTParam('string', 'mapname', [areamap]))
api_calls = []
api_calls.append(_apiclosure(output_xform, light, now, no_motionblur=True))
api_calls.append(_apiclosure(api.Scale, 1, -1, 1))
api_calls.append(_apiclosure(api.Rotate, 90, 0, 1, 0))
elif not cone_enable:
light_name = 'point'
else:
conedelta = light.wrangleFloat(wrangler, 'conedelta', now, [10])[0]
coneangle = light.wrangleFloat(wrangler, 'coneangle', now, [45])[0]
if projmap:
light_name = 'projection'
paramset.add(PBRTParam('float', 'fov', [coneangle]))
paramset.add(PBRTParam('string', 'mapname', [projmap]))
else:
light_name = 'spot'
coneangle *= 0.5
coneangle += conedelta
paramset.add(PBRTParam('float', 'coneangle', [coneangle]))
paramset.add(PBRTParam('float', 'conedeltaangle', [conedelta]))
elif light_type == 'distant':
light_name = light_type
paramset.add(PBRTParam('rgb', 'L', parms['light_color'].Value))
else:
api.Comment('Light Type, %s, not supported' % light_type)
return
for api_call in api_calls:
api_call()
_light_api_wrapper(light_name, paramset, node)
return
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_integrator(obj, wrangler, now):
node = wrangle_node_parm(obj, 'integrator_node', now)
if node is not None:
return node.type_and_paramset
parm_selection = {
'integrator' : SohoPBRT('integrator', 'string', ['path'], False),
'maxdepth' : SohoPBRT('maxdepth', 'integer', [5], False),
'rrthreshold' : SohoPBRT('rrthreshold', 'float', [1], True),
'lightsamplestrategy' :
SohoPBRT('lightsamplestrategy', 'string', ['spatial'], True),
'visualizestrategies' :
SohoPBRT('visualizestrategies', 'toggle', [False], True),
'visualizeweights' :
SohoPBRT('visualizeweights', 'toggle', [False], True),
'iterations' :
SohoPBRT('iterations', 'integer', [64], True),
'photonsperiterations' :
SohoPBRT('photonsperiterations', 'integer', [-1], True),
'imagewritefrequency' :
SohoPBRT('imagewritefrequency', 'integer', [2.14748e+09], True),
'radius' :
SohoPBRT('radius', 'float', [1], True),
'bootstrapsamples' :
SohoPBRT('bootstrapsamples', 'integer', [100000], True),
'chains' :
SohoPBRT('chains', 'integer', [1000], True),
'mutationsperpixel' :
SohoPBRT('mutataionsperpixel', 'integer', [100], True),
'largestepprobability' :
SohoPBRT('largestepprobability', 'float', [0.3], True),
'sigma' :
SohoPBRT('sigma', 'float', [0.01], True),
'strategy' :
SohoPBRT('strategy', 'string', ['all'], True),
'nsamples' :
SohoPBRT('nsamples', 'integer', ['64'], True),
'cossample' :
SohoPBRT('cossample', 'toggle', [True], True),
}
integrator_parms = {
'ao' : ['nsamples', 'cossample'],
'path' : ['maxdepth', 'rrthreshold', 'lightsamplestrategy'],
'bdpt' : ['maxdepth', 'rrthreshold', 'lightsamplestrategy',
'visualizestrategies', 'visualizeweights'],
'mlt' : ['maxdepth', 'bootstrapsamples', 'chains', 'mutationsperpixel',
'largestepprobability', 'sigma'],
'sppm' : ['maxdepth', 'iterations', 'photonsperiteration',
'imagewritefrequency', 'radius'],
'whitted' : ['maxdepth'],
'volpath' : ['maxdepth', 'rrthreshold', 'lightsamplestrategy'],
'directlighting' : ['maxdepth', 'strategy'],
}
parms = obj.evaluate(parm_selection, now)
integrator_name = parms['integrator'].Value[0]
paramset = ParamSet()
for parm_name in integrator_parms[integrator_name]:
if parm_name not in parms:
continue
paramset.add(parms[parm_name].to_pbrt())
return (integrator_name, paramset)
def wrangle_options(obj, wrangler, now):
parm_selection = {
"disabletexturefiltering": SohoPBRT(
"disabletexturefiltering", "bool", [False], True
),
"disablepixeljitter": SohoPBRT("disablepixeljitter", "bool", [False], True),
"disablewavelengthjitter": SohoPBRT(
"disablewavelengthjitter", "bool", [False], True
),
"msereferenceimage": SohoPBRT("msereferenceimage", "string", [""], True),
"msereferenceout": SohoPBRT("msereferenceout", "string", [""], True),
# NOTE:
# The PBRT default is "cameraworld" but this can cause instancing interpolation issues
# For now we'll use the PBRT default and expect the user to switch to world, but depending
# on the resolution of https://github.com/mmp/pbrt-v4/issues/206 we may need to default
# this to "world"
"rendercoordsys": SohoPBRT("rendercoordsys", "string", ["cameraworld"], True),
"seed": SohoPBRT("seed", "integer", [0], True),
"displacementedgescale": SohoPBRT(
"displacementedgescale", "float", [1.0], True
),
"forcediffuse": SohoPBRT("forcediffuse", "bool", [False], True),
"pixelstats": SohoPBRT("pixelstats", "bool", [False], True),
"wavefront": SohoPBRT("wavefront", "bool", [False], True),
}
parms = obj.evaluate(parm_selection, now)
for parm in parms:
yield (parm, parms[parm].to_pbrt())
def wrangle_integrator(obj, wrangler, now):
node = wrangle_node_parm(obj, "integrator_node", now)
if node is not None:
return node.type_and_paramset
parm_selection = {
"integrator": SohoPBRT("integrator", "string", ["path"], False),
"maxdepth": SohoPBRT("maxdepth", "integer", [5], False),
"regularize": SohoPBRT("regularize", "bool", [False], True),
"lightsampler": SohoPBRT("lightsampler", "string", ["bvh"], True),
"visualizestrategies": SohoPBRT("visualizestrategies", "bool", [False], True),
"visualizeweights": SohoPBRT("visualizeweights", "bool", [False], True),
"iterations": SohoPBRT("iterations", "integer", [64], True),
"photonsperiteration": SohoPBRT("photonsperiteration", "integer", [-1], True),
"seed": SohoPBRT("sppm_seed", "integer", [6502], True, key="seed"),
"radius": SohoPBRT("radius", "float", [1], True),
"bootstrapsamples": SohoPBRT("bootstrapsamples", "integer", [100000], True),
"chains": SohoPBRT("chains", "integer", [1000], True),
"mutationsperpixel": SohoPBRT("mutationsperpixel", "integer", [100], True),
"largestepprobability": SohoPBRT("largestepprobability", "float", [0.3], True),
"sigma": SohoPBRT("sigma", "float", [0.01], True),
"maxdistance": SohoPBRT("maxdistance", "float", ["1e38"], True),
"cossample": SohoPBRT("cossample", "bool", [True], True),
"samplelights": SohoPBRT("samplelights", "bool", [True], True),
"samplebsdf": SohoPBRT("samplebsdf", "bool", [True], True),
}
integrator_parms = {
"ambientocclusion": ["maxdistance", "cossample"],
"path": ["maxdepth", "regularize", "lightsampler"],
"bdpt": ["maxdepth", "regularize", "visualizestrategies", "visualizeweights"],
"mlt": [
"maxdepth",
"bootstrapsamples",
"chains",
"mutationsperpixel",
"largestepprobability",
"sigma",
"regularize",
],
"sppm": [
"maxdepth",
"iterations",
"photonsperiteration",
"seed",
"radius",
"regularize",
],
"lightpath": ["maxdepth"],
"randomwalk": ["maxdepth"],
"simplepath": ["maxdepth", "samplelights", "samplebsdf"],
"simplevolpath": ["maxdepth"],
"volpath": ["maxdepth", "lightsampler", "regularize"],
}
parms = obj.evaluate(parm_selection, now)
integrator_name = parms["integrator"].Value[0]
paramset = ParamSet()
for parm_name in integrator_parms[integrator_name]:
if parm_name not in parms:
continue
paramset.add(parms[parm_name].to_pbrt())
return (integrator_name, paramset)
def wrangle_geo(obj, wrangler, now):
parm_selection = {
"object:soppath": SohoPBRT("object:soppath", "string", [""], skipdefault=False),
"ptinstance": SohoPBRT("ptinstance", "integer", [0], skipdefault=False),
# NOTE: In order for shop_materialpath to evaluate correctly when using
# (full) instancing shop_materialpath needs to be a 'shaderhandle'
# and not a 'string'
# NOTE: However this does not seem to apply to shop_materialpaths on the
# instance points and has to be done manually
"shop_materialpath": SohoPBRT(
"shop_materialpath", "shaderhandle", skipdefault=False
),
"pbrt_rendersubd": SohoPBRT("pbrt_rendersubd", "bool", [False], False),
"pbrt_subdlevels": SohoPBRT(
"pbrt_subdlevels", "integer", [3], False, key="levels"
),
"pbrt_computeN": SohoPBRT("pbrt_computeN", "bool", [True], False),
"pbrt_reverseorientation": SohoPBRT(
"pbrt_reverseorientation", "bool", [False], True
),
# The combination of None as a default as well as ignore defaults being False
# is important. 'None' implying the parm is missing and not available,
# and '' meaning a vacuum medium.
# We can't ignore defaults since a default might be the only way to set a
# medium back to a vacuum.
"pbrt_interior": SohoPBRT("pbrt_interior", "string", [None], False),
"pbrt_exterior": SohoPBRT("pbrt_exterior", "string", [None], False),
"pbrt_ignorevolumes": SohoPBRT("pbrt_ignorevolumes", "bool", [False], True),
"pbrt_ignorematerials": SohoPBRT("pbrt_ignorematerials", "bool", [False], True),
"pbrt_splitdepth": SohoPBRT(
"pbrt_splitdepth", "integer", [3], True, key="splitdepth"
),
# We don't use the key=type since its a bit too generic of a name
"pbrt_curvetype": SohoPBRT("pbrt_curvetype", "string", ["flat"], True),
"pbrt_include": SohoPBRT("pbrt_include", "string", [""], False),
"pbrt_alpha_texture": SohoPBRT(
"pbrt_alpha_texture", "string", [""], skipdefault=False, key="alpha"
),
"pbrt_shadowalpha_texture": SohoPBRT(
"pbrt_shadowalpha_texture",
"string",
[""],
skipdefault=False,
key="shadowalpha",
),
# TODO, Tesselation options?
}
properties = obj.evaluate(parm_selection, now)
if "shop_materialpath" not in properties:
shop = ""
else:
shop = properties["shop_materialpath"].Value[0]
# NOTE: Having to track down shop_materialpaths does not seem to be a requirement
# with Mantra or RenderMan. Either its because I'm missing some
# logic/initialization either in Soho or in the Shading HDAs. Or there is
# some hardcoding in the Houdini libs that know how to translate
# shop_materialpath point aassignments to shaders directly through a
# SohoParm. Until that is figured out, we'll have to do it manually.
interior = None
exterior = None
if "pbrt_interior" in properties:
interior = properties["pbrt_interior"].Value[0]
if "pbrt_exterior" in properties:
exterior = properties["pbrt_exterior"].Value[0]
if "pbrt_reverseorientation" in properties:
if properties["pbrt_reverseorientation"].Value[0]:
api.ReverseOrientation()
pt_shop_found = False
if properties["ptinstance"].Value[0] == 1:
instance_info = Instancing.get_full_instance_info(obj, now)
properties[".instance_info"] = instance_info
if instance_info is not None:
pt_shop_found = process_full_pt_instance_material(instance_info)
interior, interior_paramset = process_full_pt_instance_medium(
instance_info, "interior"
)
exterior, exterior_paramset = process_full_pt_instance_medium(
instance_info, "exterior"
)
if interior_paramset is not None:
properties[".interior_overrides"] = interior_paramset
# If we found a point shop, don't output the default one here.
if shop in scene_state.shading_nodes and not pt_shop_found:
api.NamedMaterial(shop)
# We only output a MediumInterface if one or both of the parms exist
if interior is not None or exterior is not None:
interior = "" if interior is None else interior
exterior = "" if exterior is None else exterior
api.MediumInterface(interior, exterior)
for prop in ("alpha", "shadowalpha"):
alpha_tex = properties[prop].Value[0]
alpha_node = BaseNode.from_node(alpha_tex)
if (
alpha_node
and alpha_node.directive == "texture"
and alpha_node.output_type == "float"
):
if alpha_node.path not in scene_state.shading_nodes:
wrangle_shading_network(alpha_node.path, saved_nodes=set())
else:
# If the passed in alpha_texture wasn't valid, clear it so we don't add
# it to the geometry
if alpha_tex:
api.Comment("%s is an invalid float texture" % alpha_tex)
properties[prop].Value[0] = ""
if properties["pbrt_include"].Value[0]:
# If we have included a file, skip output any geo.
api.Include(properties["pbrt_include"].Value[0])
return
soppath = properties["object:soppath"].Value[0]
if not soppath:
api.Comment("Can not find soppath for object")
return
Geo.output_geo(soppath, now, properties)
return
def wrangle_light(light, wrangler, now):
# NOTE: Lights do not support motion blur so we disable it when
# outputs the xforms
node = wrangle_node_parm(light, "light_node", now)
parm_selection = {
"light_wrangler": SohoPBRT("light_wrangler", "string", [""], False),
"light_color": SohoPBRT("light_color", "float", [1, 1, 1], False),
"light_intensity": SohoPBRT("light_intensity", "float", [1], False),
"light_exposure": SohoPBRT("light_exposure", "float", [0], False),
}
parms = light.evaluate(parm_selection, now)
light_wrangler = parms["light_wrangler"].Value[0]
paramset = ParamSet()
paramset.add(_to_light_scale(parms))
if light_wrangler == "HoudiniEnvLight":
env_map = []
paramset.add(PBRTParam("rgb", "L", parms["light_color"].Value))
if light.evalString("env_map", now, env_map):
paramset.add(PBRTParam("string", "mapname", env_map))
output_xform(light, now, no_motionblur=True)
api.Scale(1, 1, -1)
api.Rotate(90, 0, 0, 1)
api.Rotate(90, 0, 1, 0)
_light_api_wrapper("infinite", paramset, node)
return
elif light_wrangler != "HoudiniLight":
api.Comment("This light type, %s, is unsupported" % light_wrangler)
return
# We are dealing with a standard HoudiniLight type.
light_type = light.wrangleString(wrangler, "light_type", now, ["point"])[0]
if light_type in ("sphere", "disk", "grid", "tube", "geo"):
single_sided = light.wrangleInt(wrangler, "singlesided", now, [0])[0]
visible = light.wrangleInt(wrangler, "light_contribprimary", now, [0])[0]
size = light.wrangleFloat(wrangler, "areasize", now, [1, 1])
paramset.add(PBRTParam("rgb", "L", parms["light_color"].Value))
paramset.add(PBRTParam("bool", "twosided", [not single_sided]))
# TODO, Possibly get the xform's scale and scale the geo, not the light.
# (for example, further multiplying down the radius)
xform = get_transform(light, now)
xform_to_api_srt(xform, scale=False)
_light_api_wrapper("diffuse", paramset, node)
api.AttributeBegin()
# PBRT only supports uniform scales for non-mesh area lights
# this is in part due to explicit light's area scaling factor.
if light_type in ("grid", "geo"):
api.Scale(size[0], size[1], size[0])
# The visibility only applies to hits on the non-emissive side of the light.
# the emissive side will still be rendered
if not visible:
api.Material("none")
if light_type == "sphere":
# We apply the scale to the radius instead of using a api.Scale
api.Shape("sphere", [PBRTParam("float", "radius", 0.5 * size[0])])
elif light_type == "tube":
api.Rotate(90, 0, 1, 0)
api.Shape(
"cylinder",
[
PBRTParam("float", "radius", 0.075 * size[1]),
PBRTParam("float", "zmin", -0.5 * size[0]),
PBRTParam("float", "zmax", 0.5 * size[0]),
],
)
elif light_type == "disk":
# After pbrt-v3 commit #2f0852ce api.ReverseOrientation() is needed,
# prior that it was a api.Scale(1,1,-1)
# (see issue #183 in pbrt-v3)
api.ReverseOrientation()
api.Shape("disk", [PBRTParam("float", "radius", 0.5 * size[0])])
elif light_type == "grid":
api.Shape(
"trianglemesh",
[
PBRTParam("integer", "indices", [0, 3, 1, 0, 2, 3]),
PBRTParam(
"point",
"P",
[-0.5, -0.5, 0, 0.5, -0.5, 0, -0.5, 0.5, 0, 0.5, 0.5, 0],
),
],
)
elif light_type == "geo":
areageo_parm = hou.node(light.getName()).parm("areageometry")
if not areageo_parm:
api.Comment('No "areageometry" parm on light')
return
area_geo_node = areageo_parm.evalAsNode()
if not area_geo_node:
api.Comment("Skipping, no geometry object specified")
return
obj = soho.getObject(area_geo_node.path())
api.Comment("Light geo from %s" % obj.getName())
# TODO: The area light scale ('areasize') happens *after* the wrangle_obj's
# xform when 'intothisobject' is enabled.
into_this_obj = light.wrangleInt(wrangler, "intothisobject", now, [0])[0]
ignore_xform = not into_this_obj
wrangle_obj(obj, None, now, ignore_xform=ignore_xform)
api.AttributeEnd()
return
cone_enable = light.wrangleInt(wrangler, "coneenable", now, [0])[0]
projmap = light.wrangleString(wrangler, "projmap", now, [""])[0]
areamap = light.wrangleString(wrangler, "areamap", now, [""])[0]
api_calls = []
api_calls.append(_apiclosure(output_xform, light, now, no_motionblur=True))
api_calls.append(_apiclosure(api.Scale, 1, 1, -1))
api_calls.append(_apiclosure(api.Scale, 1, -1, 1))
if light_type == "point":
paramset.add(PBRTParam("rgb", "I", parms["light_color"].Value))
if areamap:
light_name = "goniometric"
paramset.add(PBRTParam("string", "mapname", [areamap]))
api_calls = []
api_calls.append(_apiclosure(output_xform, light, now, no_motionblur=True))
api_calls.append(_apiclosure(api.Scale, 1, -1, 1))
api_calls.append(_apiclosure(api.Rotate, 90, 0, 1, 0))
elif not cone_enable:
light_name = "point"
else:
conedelta = light.wrangleFloat(wrangler, "conedelta", now, [10])[0]
coneangle = light.wrangleFloat(wrangler, "coneangle", now, [45])[0]
if projmap:
light_name = "projection"
paramset.add(PBRTParam("float", "fov", [coneangle]))
paramset.add(PBRTParam("string", "mapname", [projmap]))
else:
light_name = "spot"
coneangle *= 0.5
coneangle += conedelta
paramset.add(PBRTParam("float", "coneangle", [coneangle]))
paramset.add(PBRTParam("float", "conedeltaangle", [conedelta]))
elif light_type == "distant":
light_name = light_type
paramset.add(PBRTParam("rgb", "L", parms["light_color"].Value))
else:
api.Comment("Light Type, %s, not supported" % light_type)
return
for api_call in api_calls:
api_call()
_light_api_wrapper(light_name, paramset, node)
return
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_light(light, wrangler, now):
# NOTE: Lights do not support motion blur so we disable it when
# outputs the xforms
node = wrangle_node_parm(light, "light_node", now)
# We skip the light_color if its at default so we avoid setting rgb values
# if at all possible, that way we get a constant spectrum instead
parm_selection = {
"light_wrangler": SohoPBRT("light_wrangler", "string", [""], False),
"light_color": SohoPBRT("light_color", "float", [1, 1, 1], True),
"light_intensity": SohoPBRT("light_intensity", "float", [1], False),
"light_exposure": SohoPBRT("light_exposure", "float", [0], False),
}
parms = light.evaluate(parm_selection, now)
light_wrangler = parms["light_wrangler"].Value[0]
exterior = light.wrangleString(wrangler, "pbrt_exterior", now, [None])[0]
exterior = wrangle_medium(exterior)
if exterior:
api.MediumInterface("", exterior)
print()
paramset = ParamSet()
paramset.add(_to_light_scale(parms))
if light_wrangler == "HoudiniEnvLight":
env_map = []
light.evalString("env_map", now, env_map)
# evalString will return [""] if the parm exists yet at its default
env_map = env_map[0] if env_map else ""
if env_map:
paramset.add(PBRTParam("string", "filename", env_map))
elif "light_color" in parms:
paramset.add(PBRTParam("rgb", "L", parms["light_color"].Value))
portal = light.wrangleString(wrangler, "env_portal", now, [""])[0]
portal_enabled = light.wrangleInt(wrangler, "env_portalenable", now, [0])[0]
if portal_enabled and portal:
portal_pts = _portal_helper(now, portal)
if portal_pts is not None:
# TODO pbrt-v4 we may need to invert the Houdini -> PBRT xform
paramset.add(PBRTParam("point", "portal", portal_pts))
output_xform(light, now, no_motionblur=True)
api.Scale(1, 1, -1)
api.Rotate(90, 0, 0, 1)
api.Rotate(90, 0, 1, 0)
_light_api_wrapper("infinite", paramset, node)
return
elif light_wrangler != "HoudiniLight":
api.Comment("This light type, %s, is unsupported" % light_wrangler)
return
# We are dealing with a standard HoudiniLight type.
light_type = light.wrangleString(wrangler, "light_type", now, ["point"])[0]
if light_type in ("sphere", "disk", "grid", "tube", "geo"):
single_sided = light.wrangleInt(wrangler, "singlesided", now, [0])[0]
reverse = light.wrangleInt(wrangler, "reverse", now, [0])[0]
visible = light.wrangleInt(wrangler, "light_contribprimary", now, [0])[0]
size = light.wrangleFloat(wrangler, "areasize", now, [1, 1])
paramset.add(PBRTParam("bool", "twosided", [not single_sided]))
texmap = light.wrangleString(wrangler, "light_texture", now, [""])[0]
if texmap:
paramset.add(PBRTParam("string", "filename", texmap))
elif "light_color" in parms:
paramset.add(PBRTParam("rgb", "L", parms["light_color"].Value))
# TODO, Possibly get the xform's scale and scale the geo, not the light.
# (for example, further multiplying down the radius)
xform = get_transform(light, now)
xform_to_api_srt(xform, scale=False)
_light_api_wrapper("diffuse", paramset, node)
api.AttributeBegin()
if single_sided and reverse:
api.ReverseOrientation()
shape_paramset = ParamSet()
if not visible:
shape_paramset.add(PBRTParam("float", "alpha", 0.0))
# PBRT only supports uniform scales for non-mesh area lights
# this is in part due to explicit light's area scaling factor.
if light_type in ("grid", "geo"):
api.Scale(size[0], size[1], size[0])
if light_type == "sphere":
# NOTE:
# To match the UVs we need a api.Scale(1, 1, -1)
# However doing this screws up the direction of emission.
# When rendering as one sided, the emissive side will be the opposite
# side from which is used to illuminate. Unfortunately an
# api.ReverseOrientation() does not fix this.
# We apply the scale to the radius instead of using a api.Scale
shape_paramset.add(PBRTParam("float", "radius", 0.5 * size[0]))
api.Shape("sphere", shape_paramset)
elif light_type == "tube":
api.Rotate(90, 0, 1, 0)
api.Rotate(90, 0, 0, 1)
# NOTE:
# To match UVs we need a api.Scale(1, 1, -1)
# see note above about spheres.
shape_paramset.add(PBRTParam("float", "radius", 0.075 * size[1]))
shape_paramset.add(PBRTParam("float", "zmin", -0.5 * size[0]))
shape_paramset.add(PBRTParam("float", "zmax", 0.5 * size[0]))
api.Shape("cylinder", shape_paramset)
elif light_type == "disk":
# NOTE this should match mantra now, unlike in pbrt-v3
api.Scale(-1, 1, -1)
shape_paramset.add(PBRTParam("float", "radius", 0.5 * size[0]))
api.Shape("disk", shape_paramset)
elif light_type == "grid":
api.ReverseOrientation()
shape_paramset.add(
PBRTParam(
"point",
"P",
[-0.5, -0.5, 0, 0.5, -0.5, 0, -0.5, 0.5, 0, 0.5, 0.5, 0],
)
)
api.Shape("bilinearmesh", shape_paramset)
elif light_type == "geo":
areageo_parm = hou.node(light.getName()).parm("areageometry")
if not areageo_parm:
api.Comment('No "areageometry" parm on light')
return
area_geo_node = areageo_parm.evalAsNode()
if not area_geo_node:
api.Comment("Skipping, no geometry object specified")
return
obj = soho.getObject(area_geo_node.path())
api.Comment("Light geo from %s" % obj.getName())
# TODO: The area light scale ('areasize') happens *after* the wrangle_obj's
# xform when 'intothisobject' is enabled.
# TODO: the Light visiblity paramset ("alpha") can't be easily passed
# with this current interface. It can be worked aroudn by setting
# the referenced object's "alpha" property
into_this_obj = light.wrangleInt(wrangler, "intothisobject", now, [0])[0]
ignore_xform = not into_this_obj
wrangle_obj(obj, None, now, ignore_xform=ignore_xform)
api.AttributeEnd()
return
cone_enable = light.wrangleInt(wrangler, "coneenable", now, [0])[0]
projmap = light.wrangleString(wrangler, "projmap", now, [""])[0]
areamap = light.wrangleString(wrangler, "areamap", now, [""])[0]
api_calls = []
api_calls.append(_apiclosure(output_xform, light, now, no_motionblur=True))
api_calls.append(_apiclosure(api.Scale, 1, 1, -1))
api_calls.append(_apiclosure(api.Scale, 1, -1, 1))
if light_type == "point":
if areamap:
light_name = "goniometric"
if "light_color" in parms:
paramset.add(PBRTParam("rgb", "I", parms["light_color"].Value))
paramset.add(PBRTParam("string", "filename", [areamap]))
api_calls = []
api_calls.append(_apiclosure(output_xform, light, now, no_motionblur=True))
api_calls.append(_apiclosure(api.Scale, 1, -1, 1))
api_calls.append(_apiclosure(api.Rotate, 90, 0, 1, 0))
elif not cone_enable:
light_name = "point"
if "light_color" in parms:
paramset.add(PBRTParam("rgb", "I", parms["light_color"].Value))
elif projmap:
light_name = "projection"
coneangle = light.wrangleFloat(wrangler, "coneangle", now, [45])[0]
paramset.add(PBRTParam("float", "fov", [coneangle]))
paramset.add(PBRTParam("string", "filename", [projmap]))
else:
light_name = "spot"
if "light_color" in parms:
paramset.add(PBRTParam("rgb", "I", parms["light_color"].Value))
conedelta = light.wrangleFloat(wrangler, "conedelta", now, [10])[0]
coneangle = light.wrangleFloat(wrangler, "coneangle", now, [45])[0]
coneangle *= 0.5
coneangle += conedelta
paramset.add(PBRTParam("float", "coneangle", [coneangle]))
paramset.add(PBRTParam("float", "conedeltaangle", [conedelta]))
elif light_type == "distant":
light_name = light_type
if "light_color" in parms:
paramset.add(PBRTParam("rgb", "L", parms["light_color"].Value))
else:
api.Comment("Light Type, %s, not supported" % light_type)
return
for api_call in api_calls:
api_call()
_light_api_wrapper(light_name, paramset, node)
return
def wrangle_integrator(obj, wrangler, now):
node = wrangle_node_parm(obj, "integrator_node", now)
if node is not None:
return node.type_and_paramset
parm_selection = {
"integrator": SohoPBRT("integrator", "string", ["path"], False),
"maxdepth": SohoPBRT("maxdepth", "integer", [5], False),
"rrthreshold": SohoPBRT("rrthreshold", "float", [1], True),
"lightsamplestrategy": SohoPBRT(
"lightsamplestrategy", "string", ["spatial"], True
),
"visualizestrategies": SohoPBRT("visualizestrategies", "toggle", [False], True),
"visualizeweights": SohoPBRT("visualizeweights", "toggle", [False], True),
"iterations": SohoPBRT("iterations", "integer", [64], True),
"photonsperiterations": SohoPBRT("photonsperiterations", "integer", [-1], True),
"imagewritefrequency": SohoPBRT(
"imagewritefrequency", "integer", [2.14748e09], True
),
"radius": SohoPBRT("radius", "float", [1], True),
"bootstrapsamples": SohoPBRT("bootstrapsamples", "integer", [100000], True),
"chains": SohoPBRT("chains", "integer", [1000], True),
"mutationsperpixel": SohoPBRT("mutataionsperpixel", "integer", [100], True),
"largestepprobability": SohoPBRT("largestepprobability", "float", [0.3], True),
"sigma": SohoPBRT("sigma", "float", [0.01], True),
"strategy": SohoPBRT("strategy", "string", ["all"], True),
"nsamples": SohoPBRT("nsamples", "integer", ["64"], True),
"cossample": SohoPBRT("cossample", "toggle", [True], True),
}
integrator_parms = {
"ao": ["nsamples", "cossample"],
"path": ["maxdepth", "rrthreshold", "lightsamplestrategy"],
"bdpt": [
"maxdepth",
"rrthreshold",
"lightsamplestrategy",
"visualizestrategies",
"visualizeweights",
],
"mlt": [
"maxdepth",
"bootstrapsamples",
"chains",
"mutationsperpixel",
"largestepprobability",
"sigma",
],
"sppm": [
"maxdepth",
"iterations",
"photonsperiteration",
"imagewritefrequency",
"radius",
],
"whitted": ["maxdepth"],
"volpath": ["maxdepth", "rrthreshold", "lightsamplestrategy"],
"directlighting": ["maxdepth", "strategy"],
}
parms = obj.evaluate(parm_selection, now)
integrator_name = parms["integrator"].Value[0]
paramset = ParamSet()
for parm_name in integrator_parms[integrator_name]:
if parm_name not in parms:
continue
paramset.add(parms[parm_name].to_pbrt())
return (integrator_name, paramset)
def wrangle_geo(obj, wrangler, now):
parm_selection = {
'object:soppath':
SohoPBRT('object:soppath', 'string', [''], skipdefault=False),
'ptinstance':
SohoPBRT('ptinstance', 'integer', [0], skipdefault=False),
# NOTE: In order for shop_materialpath to evaluate correctly when using (full) instancing
# shop_materialpath needs to be a 'shaderhandle' and not a 'string'
# NOTE: However this does not seem to apply to shop_materialpaths on the instance points
# and has to be done manually
'shop_materialpath':
SohoPBRT('shop_materialpath', 'shaderhandle', skipdefault=False),
'pbrt_rendersubd':
SohoPBRT('pbrt_rendersubd', 'bool', [False], False),
'pbrt_subdlevels':
SohoPBRT('pbrt_subdlevels', 'integer', [3], False, key='levels'),
'pbrt_computeN':
SohoPBRT('pbrt_computeN', 'bool', [True], False),
# The combination of None as a default as well as ignore defaults being False is
# important. 'None' implying the parm is missing and not available, and '' meaning
# a vacuum medium.
# We can't ignore defaults since a default might be the only way to set a medium
# back to a vacuum.
'pbrt_interior':
SohoPBRT('pbrt_interior', 'string', [None], False),
'pbrt_exterior':
SohoPBRT('pbrt_exterior', 'string', [None], False),
'pbrt_ignorevolumes':
SohoPBRT('pbrt_ignorevolumes', 'bool', [False], True),
'pbrt_ignorematerials':
SohoPBRT('pbrt_ignorematerials', 'bool', [False], True),
'pbrt_splitdepth':
SohoPBRT('pbrt_splitdepth', 'integer', [3], True, key='splitdepth'),
# We don't use the key=type since its a bit too generic of a name
'pbrt_curvetype':
SohoPBRT('pbrt_curvetype', 'string', ['flat'], True),
'pbrt_include':
SohoPBRT('pbrt_include', 'string', [''], False),
'pbrt_alpha_texture':
SohoPBRT('pbrt_alpha_texture',
'string', [''],
skipdefault=False,
key='alpha'),
'pbrt_shadowalpha_texture':
SohoPBRT('pbrt_shadowalpha_texture',
'string', [''],
skipdefault=False,
key='shadowalpha'),
# TODO, Tesselation options?
}
properties = obj.evaluate(parm_selection, now)
if 'shop_materialpath' not in properties:
shop = ''
else:
shop = properties['shop_materialpath'].Value[0]
# NOTE: Having to track down shop_materialpaths does not seem to be a requirement
# with Mantra or RenderMan. Either its because I'm missing some logic/initialization
# either in Soho or in the Shading HDAs. Or there is some hardcoding in the Houdini libs
# that know how to translate shop_materialpath point aassignments to shaders directly
# through a SohoParm. Until that is figured out, we'll have to do it manually.
pt_shop_found = False
if properties['ptinstance'].Value[0] == 1:
pt_shop_found = Instancing.process_full_pt_instance_material(obj, now)
# If we found a point shop, don't output the default one here.
if shop in scene_state.shading_nodes and not pt_shop_found:
api.NamedMaterial(shop)
interior = None
exterior = None
if 'pbrt_interior' in properties:
interior = properties['pbrt_interior'].Value[0]
if 'pbrt_exterior' in properties:
exterior = properties['pbrt_exterior'].Value[0]
# We only output a MediumInterface if one or both of the parms exist
if interior is not None or exterior is not None:
interior = '' if interior is None else interior
exterior = '' if exterior is None else exterior
api.MediumInterface(interior, exterior)
for prop in ('alpha', 'shadowalpha'):
alpha_tex = properties[prop].Value[0]
alpha_node = BaseNode.from_node(alpha_tex)
if (alpha_node and alpha_node.directive == 'texture'
and alpha_node.output_type == 'float'):
if alpha_node.path not in scene_state.shading_nodes:
wrangle_shading_network(alpha_node.path, saved_nodes=set())
else:
# If the passed in alpha_texture wasn't valid, clear it so we don't add
# it to the geometry
if alpha_tex:
api.Comment('%s is an invalid float texture' % alpha_tex)
properties[prop].Value[0] = ''
if properties['pbrt_include'].Value[0]:
# If we have included a file, skip output any geo.
api.Include(properties['pbrt_include'].Value[0])
return
soppath = properties['object:soppath'].Value[0]
if not soppath:
api.Comment('Can not find soppath for object')
return
Geo.output_geo(soppath, now, properties)
return