Shading: Rewrite Mapping node with dynamic inputs.

This patch rewrites the Mapping node to support dynamic inputs. The
Max and Min options have been removed. They can be added as Min and
Max Vector Math nodes manually.

Texture nodes still use the old matrix-based mapping. A new SVM node
`NODE_TEXTURE_MAPPING` has been added to preserve this functionality.
Similarly, in GLSL, a `mapping_mat4` function has been added.

Reviewers: brecht, JacquesLucke

1 files changed, 3 insertions, 2 deletions

diff --git a/intern/cycles/render/nodes.h b/intern/cycles/render/nodes.h
index 271d60d16b7..769687f1f19 100644
--- a/intern/cycles/render/nodes.h
+++ b/intern/cycles/render/nodes.h
@@ -391,9 +391,10 @@ class MappingNode : public ShaderNode {
   {
     return NODE_GROUP_LEVEL_2;
   }
+  void constant_fold(const ConstantFolder &folder);
 
-  float3 vector;
-  TextureMapping tex_mapping;
+  float3 vector, location, rotation, scale;
+  NodeMappingType type;
 };
 
 class RGBToBWNode : public ShaderNode {