1 files changed, 84 insertions, 0 deletions
diff --git a/intern/cycles/kernel/osl/nodes/node_math.osl b/intern/cycles/kernel/osl/nodes/node_math.osl
new file mode 100644
index 00000000000..be9bb71d511
--- /dev/null
+++ b/intern/cycles/kernel/osl/nodes/node_math.osl
@@ -0,0 +1,84 @@
+/*
+ * Copyright 2011, Blender Foundation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "stdosl.h"
+
+float safe_divide(float a, float b)
+{
+	float result;
+
+	if(b == 0.0)
+		result = 0.0;
+	else
+		result = a/b;
+	
+	return result;
+}
+
+float safe_log(float a, float b)
+{
+	if(a < 0.0 || b < 0.0)
+		return 0.0;
+	
+	return log(a)/log(b);
+}
+
+shader node_math(
+	string type = "Add",
+	float Value1 = 0.0,
+	float Value2 = 0.0,
+	output float Value = 0.0)
+{
+	/* OSL asin, acos, pow check for values that could give rise to nan */
+
+	if(type == "Add")
+		Value = Value1 + Value2;
+	if(type == "Subtract")
+		Value = Value1 - Value2;
+	if(type == "Multiply")
+		Value = Value1*Value2;
+	if(type == "Divide")
+		Value = safe_divide(Value1, Value2);
+	if(type == "Sine")
+		Value = sin(Value1);
+	if(type == "Cosine")
+		Value = cos(Value1);
+	if(type == "Tangent")
+		Value = tan(Value1);
+	if(type == "Arcsine")
+		Value = asin(Value1);
+	if(type == "Arccosine")
+		Value = acos(Value1);
+	if(type == "Arctangent")
+		Value = atan(Value1);
+	if(type == "Power")
+		Value = pow(Value1, Value2);
+	if(type == "Logarithm")
+		Value = safe_log(Value1, Value2);
+	if(type == "Minimum")
+		Value = min(Value1, Value2);
+	if(type == "Maximum")
+		Value = max(Value1, Value2);
+	if(type == "Round")
+		Value = floor(Value1 + 0.5);
+	if(type == "Less Than")
+		Value = Value1 < Value2;
+	if(type == "Greater Than")
+		Value = Value1 > Value2;
+}
+