diff options
author | Brecht Van Lommel <brechtvanlommel@pandora.be> | 2012-11-03 18:32:13 +0400 |
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committer | Brecht Van Lommel <brechtvanlommel@pandora.be> | 2012-11-03 18:32:13 +0400 |
commit | 615fe0295fe13c229d7376b02a50ac110b636c47 (patch) | |
tree | 490bcc8d4af2abb7eed7679990fbee29a5376fb9 /intern/cycles/kernel/shaders/node_math.osl | |
parent | 6b098d7406f7d84b04be8d8604073de4e06613c9 (diff) |
Cycles OSL: refactoring and fixes
* Moved kernel/osl/nodes to kernel/shaders
* Renamed standard attributes to use geom:, particle:, object: prefixes
* Update stdosl.h to properly reflect the closures we support
* Fix the wrong stdosl.h being used for building shaders
* Add geom:numpolyvertices, geom:trianglevertices, geom:polyvertices attributes
Diffstat (limited to 'intern/cycles/kernel/shaders/node_math.osl')
-rw-r--r-- | intern/cycles/kernel/shaders/node_math.osl | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/intern/cycles/kernel/shaders/node_math.osl b/intern/cycles/kernel/shaders/node_math.osl new file mode 100644 index 00000000000..24dce898fd2 --- /dev/null +++ b/intern/cycles/kernel/shaders/node_math.osl @@ -0,0 +1,88 @@ +/* + * 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", + int Clamp = 0, + 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; + + if (Clamp) + Value = clamp(Value1, 0.0, 1.0); +} + |