Cycles: changes to source code folders structure

* Split render/ into scene/ and session/. The scene/ folder now contains the
  scene and its nodes. The session/ folder contains the render session and
  associated data structures like drivers and render buffers.
* Move top level kernel headers into new folders kernel/camera/, kernel/film/,
  kernel/light/, kernel/sample/, kernel/util/
* Move integrator related kernel headers into kernel/integrator/
* Move OSL shaders from kernel/shaders/ to kernel/osl/shaders/

For patches and branches, git merge and rebase should be able to detect the
renames and move over code to the right file.

1 files changed, 43 insertions, 0 deletions

diff --git a/intern/cycles/kernel/osl/shaders/node_glass_bsdf.osl b/intern/cycles/kernel/osl/shaders/node_glass_bsdf.osl
new file mode 100644
index 00000000000..0042d573f8d
--- /dev/null
+++ b/intern/cycles/kernel/osl/shaders/node_glass_bsdf.osl
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2011-2013 Blender Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "node_fresnel.h"
+#include "stdcycles.h"
+
+shader node_glass_bsdf(color Color = 0.8,
+                       string distribution = "sharp",
+                       float Roughness = 0.2,
+                       float IOR = 1.45,
+                       normal Normal = N,
+                       output closure color BSDF = 0)
+{
+  float f = max(IOR, 1e-5);
+  float eta = backfacing() ? 1.0 / f : f;
+  float cosi = dot(I, Normal);
+  float Fr = fresnel_dielectric_cos(cosi, eta);
+  float roughness = Roughness * Roughness;
+
+  if (distribution == "sharp")
+    BSDF = Color * (Fr * reflection(Normal) + (1.0 - Fr) * refraction(Normal, eta));
+  else if (distribution == "beckmann")
+    BSDF = Color * (Fr * microfacet_beckmann(Normal, roughness) +
+                    (1.0 - Fr) * microfacet_beckmann_refraction(Normal, roughness, eta));
+  else if (distribution == "Multiscatter GGX")
+    BSDF = Color * microfacet_multi_ggx_glass(Normal, roughness, eta, Color);
+  else if (distribution == "GGX")
+    BSDF = Color * (Fr * microfacet_ggx(Normal, roughness) +
+                    (1.0 - Fr) * microfacet_ggx_refraction(Normal, roughness, eta));
+}