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wrinkle.py
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wrinkle.py
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# Copyright (C) 2021 Victor Soupday
# This file is part of CC/iC Blender Tools <https://github.com/soupday/cc_blender_tools>
#
# CC/iC Blender Tools is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# CC/iC Blender Tools is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with CC/iC Blender Tools. If not, see <https://www.gnu.org/licenses/>.
import bpy
from . import drivers, nodeutils, utils, params, vars
WRINKLE_SHADER_NAME="rl_wrinkle_shader"
WRINKLE_STRENGTH_PROP = "wrinkle_strength"
WRINKLE_STRENGTH_VAR = "varstr"
WRINKLE_CURVE_PROP = "wrinkle_curve"
WRINKLE_CURVE_VAR = "varcrv"
WRINKLE_VAR_PREFIX = "var"
def get_wrinkle_shader_node(mat):
if mat and mat.node_tree:
nodes = mat.node_tree.nodes
wrinkle_shader_id = "(rl_wrinkle_shader)"
for node in nodes:
if vars.NODE_PREFIX in node.name:
if wrinkle_shader_id in node.name:
return node
def get_wrinkle_shader(obj, mat, mat_json, shader_name="rl_wrinkle_shader",
create=True, remove=True, add_mappings=False):
shader_id = "(" + str(shader_name) + ")"
wrinkle_node = None
# find existing wrinkle shader group node and remove any old or impostors
to_remove = []
if mat and mat.node_tree:
nodes = mat.node_tree.nodes
for n in nodes:
if n.type == "GROUP":
if shader_id in n.name and shader_name in n.node_tree.name:
if vars.VERSION_STRING in n.name and vars.VERSION_STRING in n.node_tree.name:
wrinkle_node = n
else:
to_remove.append(n)
if remove:
for n in to_remove:
nodes.remove(n)
# create a new wrinkle shader group node if none
if create and not wrinkle_node:
group = nodeutils.get_node_group(shader_name)
wrinkle_node = nodeutils.make_node_group_node(nodes, group, "Wrinkle Map System", utils.unique_name(shader_id))
wrinkle_node.width = 240
utils.log_info("Created new wrinkle system shader group: " + wrinkle_node.name)
if wrinkle_node and add_mappings:
add_wrinkle_mappings(mat, wrinkle_node, obj, mat_json)
return wrinkle_node
def add_wrinkle_shader(chr_cache, links, mat, mat_json, main_shader_name, wrinkle_shader_name=WRINKLE_SHADER_NAME):
body_obj = drivers.get_head_body_object(chr_cache)
wrinkle_shader_node = get_wrinkle_shader(body_obj, mat, mat_json,
shader_name=wrinkle_shader_name,
create=True, remove=True, add_mappings=True)
bsdf_node, main_shader_node, mix_node = nodeutils.get_shader_nodes(mat, main_shader_name)
wrinkle_shader_node.location = (-2400, 0)
nodeutils.link_nodes(links, wrinkle_shader_node, "Diffuse Map", main_shader_node, "Diffuse Map")
nodeutils.link_nodes(links, wrinkle_shader_node, "Roughness Map", main_shader_node, "Roughness Map")
nodeutils.link_nodes(links, wrinkle_shader_node, "Normal Map", main_shader_node, "Normal Map")
#if not nodeutils.has_connected_input(main_shader_node, "Height Map"):
# nodeutils.link_nodes(links, wrinkle_shader_node, "Height Map", main_shader_node, "Height Map")
# nodeutils.link_nodes(links, wrinkle_shader_node, "Height Delta", main_shader_node, "Height Delta")
return wrinkle_shader_node
def build_wrinkle_drivers(chr_cache, chr_json, wrinkle_shader_name=WRINKLE_SHADER_NAME):
body_obj = drivers.get_head_body_object(chr_cache)
head_mat, head_mat_json = drivers.get_head_material_and_json(chr_cache, chr_json)
if body_obj and head_mat and head_mat_json:
wrinkle_shader_node = get_wrinkle_shader(body_obj, head_mat, head_mat_json,
shader_name=wrinkle_shader_name,
create=False, remove=False,
add_mappings=True)
def get_wrinkle_params(mat_json):
wrinkle_params = {}
overall_weight = 1.0
if "Wrinkle" in mat_json.keys():
wrinkle_json = mat_json["Wrinkle"]
if ("WrinkleRules" in wrinkle_json.keys() and
"WrinkleEaseStrength" in wrinkle_json.keys() and
"WrinkleRuleWeights" in wrinkle_json.keys()):
rule_names = wrinkle_json["WrinkleRules"]
ease_strengths = wrinkle_json["WrinkleEaseStrength"]
weights = wrinkle_json["WrinkleRuleWeights"]
for i in range(0, len(rule_names)):
wrinkle_params[rule_names[i]] = { "ease_strength": ease_strengths[i], "weight": weights[i] }
if "WrinkleOverallWeight" in wrinkle_json.keys():
overall_weight = wrinkle_json["WrinkleOverallWeight"]
return wrinkle_params, overall_weight
def add_wrinkle_mappings(mat, node, body_obj, mat_json):
utils.log_info(f"Building Wrinkle map system drivers: {mat.name} / {node.name}")
if not body_obj.data.shape_keys or not body_obj.data.shape_keys.key_blocks:
return
wrinkle_defs = {}
wrinkle_params, overall_weight = get_wrinkle_params(mat_json)
drivers.add_custom_float_property(body_obj, WRINKLE_STRENGTH_PROP, overall_weight, value_min=0.0, value_max=2.0)
drivers.add_custom_float_property(body_obj, WRINKLE_CURVE_PROP, 1.0, value_min=0.25, value_max=2.0)
for wrinkle_name in params.WRINKLE_RULES.keys():
weight, func = params.WRINKLE_RULES[wrinkle_name]
if wrinkle_name in wrinkle_params.keys():
weight *= wrinkle_params[wrinkle_name]["weight"]
wrinkle_def = { "weight": weight, "func": func, "keys": [] }
wrinkle_defs[wrinkle_name] = wrinkle_def
for shape_key, wrinkle_name, range_min, range_max in params.WRINKLE_MAPPINGS:
if shape_key in body_obj.data.shape_keys.key_blocks:
if wrinkle_name in params.WRINKLE_RULES.keys():
weight, func = params.WRINKLE_RULES[wrinkle_name]
key_def = [shape_key, range_min * weight, range_max * weight]
wrinkle_defs[wrinkle_name]["keys"].append(key_def)
else:
utils.log_error(f"Wrinkle Morph Name: {wrinkle_name} not found in Wrinkle Rules!")
else:
utils.log_info(f"Skipping shape key: {shape_key}, not found in body mesh.")
for socket_name in params.WRINKLE_DRIVERS:
expr_macro = params.WRINKLE_DRIVERS[socket_name]
add_wrinkle_node_driver(mat, node, socket_name, body_obj, expr_macro, wrinkle_defs)
def add_wrinkle_node_driver(mat, node, socket_name, obj, expr_macro : str, wrinkle_defs):
s = expr_macro.find(r"{")
if s == -1:
utils.log_error(f"No braces in wrinkle macro expression! {expr_macro}")
return
var_defs = []
while s > -1:
e = expr_macro.find(r"}", s)
if e > -1:
rule_name = expr_macro[s+1:e]
expr = get_driver_expression(obj, mat, rule_name, wrinkle_defs, var_defs)
expr_macro = expr_macro.replace(r"{" + rule_name + r"}", expr)
s = expr_macro.find(r"{", s + len(expr))
else:
utils.log_error(f"No end braces in wrinkle macro expression! {expr_macro}")
return
if len(var_defs) == 0:
return
socket: bpy.types.NodeSocket = node.inputs[socket_name]
expr_code = f"{WRINKLE_STRENGTH_VAR} * pow({expr_macro}, {WRINKLE_CURVE_VAR})"
driver = drivers.make_driver(socket, "default_value", "SCRIPTED", expr_code)
# global vars
drivers.make_driver_var(driver, "SINGLE_PROP", WRINKLE_STRENGTH_VAR, obj,
data_path = f"[\"{WRINKLE_STRENGTH_PROP}\"]")
drivers.make_driver_var(driver, "SINGLE_PROP", WRINKLE_CURVE_VAR, obj,
data_path = f"[\"{WRINKLE_CURVE_PROP}\"]")
# add driver variables
for i, var_def in enumerate(var_defs):
drivers.make_driver_var(driver, "SINGLE_PROP", var_def["name"], var_def["target"],
target_type = var_def["target_type"], data_path = var_def["data_path"])
def get_driver_expression(obj, mat, rule_name, wrinkle_defs : dict, var_defs : list):
# wrinkle_defs = { wrinkle_name: { "weight": weight, "func": func, "keys": [ [shape_key_name, range_min, range_max], ] } }
# var_defs = [ { "name": name, "shape_key": shape_key_name, "target": target, "target_type": type, "data_path": data_path }, ]
if rule_name in wrinkle_defs:
var_id = len(var_defs) + 1
var_code = ""
wrinkle_def = wrinkle_defs[rule_name]
weight = wrinkle_def["weight"]
func = wrinkle_def["func"]
key_defs = wrinkle_def["keys"]
for i, key_def in enumerate(key_defs):
shape_key_name = key_def[0]
range_min = key_def[1]
range_max = key_def[2]
var_def = {}
for vdef in var_defs:
if vdef["shape_key"] == shape_key_name:
var_def = vdef
break
if not var_def:
var_def["name"] = f"{WRINKLE_VAR_PREFIX}{var_id}"
var_id += 1
var_def["shape_key"] = shape_key_name
var_def["target"] = obj.data
var_def["target_type"] = "MESH"
var_def["data_path"] = f"shape_keys.key_blocks[\"{shape_key_name}\"].value"
var_defs.append(var_def)
var_name = var_def["name"]
if i > 0:
if func == "MAX" or func == "MIN":
var_code += ", "
elif func == "ADD":
var_code += " + "
if range_min == 0 and range_max == 1:
var_range_expr = f"{var_name}"
elif range_min == 0:
var_range_expr = f"{range_max * weight} * {var_name}"
else:
var_range_expr = f"{range_min * weight} + ({range_max * weight} - {range_min * weight}) * {var_name}"
var_code += var_range_expr
# add a driver for the node socket input value: node.inputs[socket_name].default_value
if func == "MAX":
expr = f"max({var_code})"
elif func == "MIN":
expr = f"min({var_code})"
elif func == "ADD":
expr = f"({var_code})"
return f"max(0, {expr})"
return "0"
def is_wrinkle_system(node):
wrinkle_shader_id = "(rl_wrinkle_shader)"
if wrinkle_shader_id in node.name:
return True
else:
return False