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rendering_shader_ball.py
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rendering_shader_ball.py
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# blender --background --python 04_principled_bsdf.py --render-frame 1 -- </path/to/output/image> <resolution_percentage> <num_samples>
import bpy
import sys
import math
import os
working_dir_path = os.path.dirname(os.path.abspath(__file__))
sys.path.append(working_dir_path)
import blender_utils
def set_principled_node_as_rough_white(principled_node: bpy.types.Node) -> None:
blender_utils.set_principled_node(
principled_node=principled_node,
base_color=(0.95, 0.95, 0.95, 1.0),
metallic=0.5,
specular=0.5,
roughness=0.9,
)
def set_principled_node_as_shiny_blue(principled_node: bpy.types.Node) -> None:
blender_utils.set_principled_node(
principled_node=principled_node,
base_color=(0.1, 0.2, 0.6, 1.0),
metallic=1.0,
specular=0.5,
roughness=0.1,
)
def set_principled_node_as_ceramic(principled_node: bpy.types.Node) -> None:
blender_utils.set_principled_node(
principled_node=principled_node,
base_color=(0.8, 0.8, 0.8, 1.0),
subsurface=0.1,
subsurface_color=(0.9, 0.9, 0.9, 1.0),
subsurface_radius=(1.0, 1.0, 1.0),
metallic=0.2,
specular=0.5,
roughness=0.0,
)
def set_principled_node_as_gold(principled_node: bpy.types.Node) -> None:
blender_utils.set_principled_node(
principled_node=principled_node,
base_color=(1.00, 0.71, 0.22, 1.0),
metallic=0.9,
specular=0.5,
roughness=0.273,
)
def set_principled_node_as_silver(principled_node: bpy.types.Node) -> None:
blender_utils.set_principled_node(
principled_node=principled_node,
base_color=(0.95, 0.95, 0.95, 1.0),
metallic=1.0,
specular=0.5,
roughness=0.0,
)
def set_principled_node_as_glass(principled_node: bpy.types.Node) -> None:
blender_utils.set_principled_node(principled_node=principled_node,
base_color=(0.95, 0.95, 0.95, 1.0),
metallic=0.0,
specular=0.5,
roughness=0.0,
clearcoat=0.5,
clearcoat_roughness=0.030,
ior=1.45,
transmission=0.98)
def set_scene_objects() -> bpy.types.Object:
left_object, center1_object, center2_object, right_object = blender_utils.create_three_smooth_sphere(radius=3)
monkey = blender_utils.create_smooth_monkey(location=(0.0, 0.0, 11), rotation=(0.0, 0.0, +math.pi * 30.0 / 180.0))
monkey.scale = (4,4,4)
mat = blender_utils.add_material("Material_mon", use_nodes=True, make_node_tree_empty=True)
nodes = mat.node_tree.nodes
links = mat.node_tree.links
output_node = nodes.new(type='ShaderNodeOutputMaterial')
principled_node = nodes.new(type='ShaderNodeBsdfPrincipled')
set_principled_node_as_silver(principled_node)
links.new(principled_node.outputs['BSDF'], output_node.inputs['Surface'])
monkey.data.materials.append(mat)
mat = blender_utils.add_material("Material_Left", use_nodes=True, make_node_tree_empty=True)
nodes = mat.node_tree.nodes
links = mat.node_tree.links
output_node = nodes.new(type='ShaderNodeOutputMaterial')
principled_node = nodes.new(type='ShaderNodeBsdfPrincipled')
set_principled_node_as_glass(principled_node)
links.new(principled_node.outputs['BSDF'], output_node.inputs['Surface'])
left_object.data.materials.append(mat)
mat = blender_utils.add_material("Material_Center1", use_nodes=True, make_node_tree_empty=True)
nodes = mat.node_tree.nodes
links = mat.node_tree.links
output_node = nodes.new(type='ShaderNodeOutputMaterial')
principled_node = nodes.new(type='ShaderNodeBsdfPrincipled')
set_principled_node_as_rough_white(principled_node)
links.new(principled_node.outputs['BSDF'], output_node.inputs['Surface'])
center1_object.data.materials.append(mat)
mat = blender_utils.add_material("Material_Center2", use_nodes=True, make_node_tree_empty=True)
nodes = mat.node_tree.nodes
links = mat.node_tree.links
output_node = nodes.new(type='ShaderNodeOutputMaterial')
principled_node = nodes.new(type='ShaderNodeBsdfPrincipled')
set_principled_node_as_silver(principled_node)
links.new(principled_node.outputs['BSDF'], output_node.inputs['Surface'])
center2_object.data.materials.append(mat)
mat = blender_utils.add_material("Material_Right", use_nodes=True, make_node_tree_empty=True)
nodes = mat.node_tree.nodes
links = mat.node_tree.links
output_node = nodes.new(type='ShaderNodeOutputMaterial')
principled_node = nodes.new(type='ShaderNodeBsdfPrincipled')
set_principled_node_as_gold(principled_node)
links.new(principled_node.outputs['BSDF'], output_node.inputs['Surface'])
right_object.data.materials.append(mat)
current_object = blender_utils.create_plane(size=100.0, name="Floor")
mat = blender_utils.add_material("Material_Plane", use_nodes=True, make_node_tree_empty=True)
nodes = mat.node_tree.nodes
links = mat.node_tree.links
output_node = nodes.new(type='ShaderNodeOutputMaterial')
principled_node = nodes.new(type='ShaderNodeBsdfPrincipled')
set_principled_node_as_ceramic(principled_node)
links.new(principled_node.outputs['BSDF'], output_node.inputs['Surface'])
current_object.data.materials.append(mat)
bpy.ops.object.empty_add(location=(0.0, -0.75, 6.3))
focus_target = bpy.context.object
return focus_target
# Args
input_hdri_path = str(sys.argv[sys.argv.index('--') + 4])
output_file_path = bpy.path.relpath(str(sys.argv[sys.argv.index('--') + 1]))
resolution_percentage = int(sys.argv[sys.argv.index('--') + 2])
num_samples = int(sys.argv[sys.argv.index('--') + 3])
# Parameters
# hdri_path = os.path.join(working_dir_path, "assets/HDRIs/green_point_park_2k.hdr")
if os.path.isdir(input_hdri_path):
hdris = sorted(os.listdir(input_hdri_path))
else:
hdris = [input_hdri_path]
valid_path = []
for hdri in hdris:
if '.exr' in hdri or '.hdr' in hdri:
path = os.path.join(input_hdri_path, hdri)
else:
continue
valid_path.append(path)
# Scene Building
scene = bpy.data.scenes["Scene"]
world = scene.world
## Reset
blender_utils.clean_objects()
## Suzannes
focus_target = set_scene_objects()
## Camera
bpy.ops.object.camera_add(location=(0.0, -25.0, 2.0))
camera_object = bpy.context.object
blender_utils.add_track_to_constraint(camera_object, focus_target)
blender_utils.set_camera_params(camera_object.data, focus_target, lens=25, fstop=1.4)
blender_utils.set_cycles_renderer(scene, camera_object, num_samples)
blender_utils.build_environment_texture_background(world)
for hdri_path in valid_path:
## Lights
blender_utils.set_environment_texture_background(world, hdri_path)
name = hdri_path.split('/')[-1][:-4]
# Render Setting
blender_utils.set_output_properties(scene, resolution_percentage, os.path.join(output_file_path, name+'_balls.png'))
bpy.ops.render.render(write_still=True)