1 files changed, 145 insertions, 0 deletions
diff --git a/source/blender/nodes/shader/nodes/node_shader_bsdf_hair_principled.cc b/source/blender/nodes/shader/nodes/node_shader_bsdf_hair_principled.cc
new file mode 100644
index 00000000000..7062888b5fb
--- /dev/null
+++ b/source/blender/nodes/shader/nodes/node_shader_bsdf_hair_principled.cc
@@ -0,0 +1,145 @@
+/*
+ * This program 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 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2018 Blender Foundation.
+ * All rights reserved.
+ */
+
+#include "node_shader_util.hh"
+
+#include "UI_interface.h"
+#include "UI_resources.h"
+
+namespace blender::nodes::node_shader_bsdf_hair_principled_cc {
+
+/* Color, melanin and absorption coefficient default to approximately same brownish hair. */
+static void node_declare(NodeDeclarationBuilder &b)
+{
+  b.add_input<decl::Color>(N_("Color")).default_value({0.017513f, 0.005763f, 0.002059f, 1.0f});
+  b.add_input<decl::Float>(N_("Melanin"))
+      .default_value(0.8f)
+      .min(0.0f)
+      .max(1.0f)
+      .subtype(PROP_FACTOR);
+  b.add_input<decl::Float>(N_("Melanin Redness"))
+      .default_value(1.0f)
+      .min(0.0f)
+      .max(1.0f)
+      .subtype(PROP_FACTOR);
+  b.add_input<decl::Color>(N_("Tint")).default_value({1.0f, 1.0f, 1.0f, 1.0f});
+  b.add_input<decl::Vector>(N_("Absorption Coefficient"))
+      .default_value({0.245531f, 0.52f, 1.365f})
+      .min(0.0f)
+      .max(1000.0f);
+  b.add_input<decl::Float>(N_("Roughness"))
+      .default_value(0.3f)
+      .min(0.0f)
+      .max(1.0f)
+      .subtype(PROP_FACTOR);
+  b.add_input<decl::Float>(N_("Radial Roughness"))
+      .default_value(0.3f)
+      .min(0.0f)
+      .max(1.0f)
+      .subtype(PROP_FACTOR);
+  b.add_input<decl::Float>(N_("Coat"))
+      .default_value(0.0f)
+      .min(0.0f)
+      .max(1.0f)
+      .subtype(PROP_FACTOR);
+  b.add_input<decl::Float>(N_("IOR")).default_value(1.55f).min(0.0f).max(1000.0f).subtype(
+      PROP_FACTOR);
+  b.add_input<decl::Float>(N_("Offset"))
+      .default_value(2.0f * ((float)M_PI) / 180.0f)
+      .min(-M_PI_2)
+      .max(M_PI_2)
+      .subtype(PROP_ANGLE);
+  b.add_input<decl::Float>(N_("Random Color"))
+      .default_value(0.0f)
+      .min(0.0f)
+      .max(1.0f)
+      .subtype(PROP_FACTOR);
+  b.add_input<decl::Float>(N_("Random Roughness"))
+      .default_value(0.0f)
+      .min(0.0f)
+      .max(1.0f)
+      .subtype(PROP_FACTOR);
+  b.add_input<decl::Float>(N_("Random")).hide_value();
+  b.add_output<decl::Shader>(N_("BSDF"));
+}
+
+static void node_shader_buts_principled_hair(uiLayout *layout,
+                                             bContext *UNUSED(C),
+                                             PointerRNA *ptr)
+{
+  uiItemR(layout, ptr, "parametrization", UI_ITEM_R_SPLIT_EMPTY_NAME, "", ICON_NONE);
+}
+
+/* Initialize the custom Parametrization property to Color. */
+static void node_shader_init_hair_principled(bNodeTree *UNUSED(ntree), bNode *node)
+{
+  node->custom1 = SHD_PRINCIPLED_HAIR_REFLECTANCE;
+}
+
+/* Triggers (in)visibility of some sockets when changing Parametrization. */
+static void node_shader_update_hair_principled(bNodeTree *ntree, bNode *node)
+{
+  int parametrization = node->custom1;
+
+  LISTBASE_FOREACH (bNodeSocket *, sock, &node->inputs) {
+    if (STREQ(sock->name, "Color")) {
+      nodeSetSocketAvailability(ntree, sock, parametrization == SHD_PRINCIPLED_HAIR_REFLECTANCE);
+    }
+    else if (STREQ(sock->name, "Melanin")) {
+      nodeSetSocketAvailability(
+          ntree, sock, parametrization == SHD_PRINCIPLED_HAIR_PIGMENT_CONCENTRATION);
+    }
+    else if (STREQ(sock->name, "Melanin Redness")) {
+      nodeSetSocketAvailability(
+          ntree, sock, parametrization == SHD_PRINCIPLED_HAIR_PIGMENT_CONCENTRATION);
+    }
+    else if (STREQ(sock->name, "Tint")) {
+      nodeSetSocketAvailability(
+          ntree, sock, parametrization == SHD_PRINCIPLED_HAIR_PIGMENT_CONCENTRATION);
+    }
+    else if (STREQ(sock->name, "Absorption Coefficient")) {
+      nodeSetSocketAvailability(
+          ntree, sock, parametrization == SHD_PRINCIPLED_HAIR_DIRECT_ABSORPTION);
+    }
+    else if (STREQ(sock->name, "Random Color")) {
+      nodeSetSocketAvailability(
+          ntree, sock, parametrization == SHD_PRINCIPLED_HAIR_PIGMENT_CONCENTRATION);
+    }
+  }
+}
+
+}  // namespace blender::nodes::node_shader_bsdf_hair_principled_cc
+
+/* node type definition */
+void register_node_type_sh_bsdf_hair_principled()
+{
+  namespace file_ns = blender::nodes::node_shader_bsdf_hair_principled_cc;
+
+  static bNodeType ntype;
+
+  sh_node_type_base(
+      &ntype, SH_NODE_BSDF_HAIR_PRINCIPLED, "Principled Hair BSDF", NODE_CLASS_SHADER);
+  ntype.declare = file_ns::node_declare;
+  ntype.draw_buttons = file_ns::node_shader_buts_principled_hair;
+  node_type_size_preset(&ntype, NODE_SIZE_LARGE);
+  node_type_init(&ntype, file_ns::node_shader_init_hair_principled);
+  node_type_update(&ntype, file_ns::node_shader_update_hair_principled);
+
+  nodeRegisterType(&ntype);
+}