1 files changed, 57 insertions, 0 deletions
diff --git a/intern/cycles/kernel/osl/shaders/node_hair_bsdf.osl b/intern/cycles/kernel/osl/shaders/node_hair_bsdf.osl
new file mode 100644
index 00000000000..3e0ac7af2e0
--- /dev/null
+++ b/intern/cycles/kernel/osl/shaders/node_hair_bsdf.osl
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2011, Blender Foundation.
+ *
+ * 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.
+ */
+
+#include "stdcycles.h"
+
+shader node_hair_bsdf(color Color = 0.8,
+                      string component = "reflection",
+                      float Offset = 0.0,
+                      float RoughnessU = 0.1,
+                      float RoughnessV = 1.0,
+                      normal Tangent = normal(0, 0, 0),
+                      output closure color BSDF = 0)
+{
+  float roughnessh = clamp(RoughnessU, 0.001, 1.0);
+  float roughnessv = clamp(RoughnessV, 0.001, 1.0);
+  float offset = -Offset;
+
+  normal T;
+  float IsCurve = 0;
+  getattribute("geom:is_curve", IsCurve);
+
+  if (isconnected(Tangent)) {
+    T = Tangent;
+  }
+  else if (!IsCurve) {
+    T = normalize(dPdv);
+    offset = 0.0;
+  }
+  else {
+    T = normalize(dPdu);
+  }
+
+  if (backfacing() && IsCurve) {
+    BSDF = transparent();
+  }
+  else {
+    if (component == "reflection")
+      BSDF = Color * hair_reflection(Ng, roughnessh, roughnessv, T, offset);
+    else
+      BSDF = Color * hair_transmission(Ng, roughnessh, roughnessv, T, offset);
+  }
+}