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# SPDX-License-Identifier: GPL-2.0-or-later
import bpy
# FUNCTION: Checks if cycles is available
def cycles_exists():
return hasattr(bpy.types.Scene, "cycles")
# FUNCTION: Checks if cycles is the active renderer
def cycles_active(context):
return context.scene.render.engine == "CYCLES"
# FUNCTION: Check if material has Emission (for select and stats)
def cycles_is_emission(context, ob):
is_emission = False
if not ob.material_slots:
return is_emission
for ma in ob.material_slots:
if not ma.material:
continue
if ma.material.node_tree and ma.material.node_tree.nodes:
for no in ma.material.node_tree.nodes:
if not no.type in ("EMISSION", "GROUP"):
continue
for ou in no.outputs:
if not ou.links:
continue
if no.type == "GROUP" and no.node_tree and no.node_tree.nodes:
for gno in no.node_tree.nodes:
if gno.type != "EMISSION":
continue
for gou in gno.outputs:
if ou.links and gou.links:
is_emission = True
elif no.type == "EMISSION":
if ou.links:
is_emission = True
return is_emission
# FUNCTION: Check if object has keyframes for a specific frame
def is_keyframe(ob, frame):
if ob is not None and ob.animation_data is not None and ob.animation_data.action is not None:
for fcu in ob.animation_data.action.fcurves:
if frame in (p.co.x for p in fcu.keyframe_points):
return True
return False
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