Cycles: support for custom shader AOVs

Custom render passes are added in the Shader AOVs panel in the view layer
settings, with a name and data type. In shader nodes, an AOV Output node
is then used to output either a value or color to the pass.

Arbitrary names can be used for these passes, as long as they don't conflict
with built-in passes that are enabled. The AOV Output node can be used in both
material and world shader nodes.

Implemented by Lukas, with tweaks by Brecht.

Differential Revision: https://developer.blender.org/D4837

1 files changed, 5 insertions, 0 deletions

diff --git a/intern/cycles/render/graph.h b/intern/cycles/render/graph.h
index cade04de374..0ea7935f714 100644
--- a/intern/cycles/render/graph.h
+++ b/intern/cycles/render/graph.h
@@ -67,6 +67,7 @@ enum ShaderNodeSpecialType {
   SHADER_SPECIAL_TYPE_COMBINE_CLOSURE,
   SHADER_SPECIAL_TYPE_OUTPUT,
   SHADER_SPECIAL_TYPE_BUMP,
+  SHADER_SPECIAL_TYPE_OUTPUT_AOV,
 };
 
 /* Input
@@ -104,6 +105,8 @@ class ShaderInput {
     ((Node *)parent)->set(socket_type, f);
   }
 
+  void disconnect();
+
   const SocketType &socket_type;
   ShaderNode *parent;
   ShaderOutput *link;
@@ -130,6 +133,8 @@ class ShaderOutput {
     return socket_type.type;
   }
 
+  void disconnect();
+
   const SocketType &socket_type;
   ShaderNode *parent;
   vector<ShaderInput *> links;