Shading: Add Clamp node to Cycles and EEVEE.

This patch adds a new node that clamps a value between a maximum and
a minimum values.

Reviewers: brecht

Differential Revision: https://developer.blender.org/D5476

2 files changed, 24 insertions, 0 deletions

diff --git a/intern/cycles/kernel/shaders/CMakeLists.txt b/intern/cycles/kernel/shaders/CMakeLists.txt
index 2a84d89f9be..63cef6e841b 100644
--- a/intern/cycles/kernel/shaders/CMakeLists.txt
+++ b/intern/cycles/kernel/shaders/CMakeLists.txt
@@ -13,6 +13,7 @@ set(SRC_OSL
   node_bump.osl
   node_camera.osl
   node_checker_texture.osl
+  node_clamp.osl
   node_combine_rgb.osl
   node_combine_hsv.osl
   node_combine_xyz.osl
diff --git a/intern/cycles/kernel/shaders/node_clamp.osl b/intern/cycles/kernel/shaders/node_clamp.osl
new file mode 100644
index 00000000000..43b0fe88172
--- /dev/null
+++ b/intern/cycles/kernel/shaders/node_clamp.osl
@@ -0,0 +1,23 @@
+/*
+ * 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 "stdosl.h"
+
+shader node_clamp(float Value = 1.0, float Min = 0.0, float Max = 1.0,
+                  output float Result = 0.0)
+{
+    Result = clamp(Value, Min, Max);
+}