Shader Nodes: Add Interpolation modes to Map Range node

Modes: Linear interpolation (default), stepped linear, smoothstep and smootherstep.

This also includes an additional option for the **Clamp node** to switch between **Min Max** (default) and **Range** mode.

This was needed to allow clamping when **To Max** is less than **To Min**.

Reviewed By: JacquesLucke, brecht

Differential Revision: https://developer.blender.org/D5827

1 files changed, 3 insertions, 2 deletions

diff --git a/intern/cycles/render/nodes.h b/intern/cycles/render/nodes.h
index b8f1328f4b9..ae762f3db1c 100644
--- a/intern/cycles/render/nodes.h
+++ b/intern/cycles/render/nodes.h
@@ -1290,14 +1290,14 @@ class BlackbodyNode : public ShaderNode {
 class MapRangeNode : public ShaderNode {
  public:
   SHADER_NODE_CLASS(MapRangeNode)
-  void constant_fold(const ConstantFolder &folder);
   virtual int get_group()
   {
     return NODE_GROUP_LEVEL_3;
   }
   void expand(ShaderGraph *graph);
 
-  float value, from_min, from_max, to_min, to_max;
+  float value, from_min, from_max, to_min, to_max, steps;
+  NodeMapRangeType type;
   bool clamp;
 };
 
@@ -1310,6 +1310,7 @@ class ClampNode : public ShaderNode {
     return NODE_GROUP_LEVEL_3;
   }
   float value, min, max;
+  NodeClampType type;
 };
 
 class MathNode : public ShaderNode {