b9ce231060
More information in this post: http://code.blender.org/ Thanks to all contributes for giving their permission!
101 lines
2.2 KiB
Plaintext
101 lines
2.2 KiB
Plaintext
/*
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* Copyright 2011-2013 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License
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*/
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#include "stdosl.h"
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float safe_divide(float a, float b)
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{
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float result;
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if (b == 0.0)
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result = 0.0;
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else
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result = a / b;
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return result;
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}
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float safe_modulo(float a, float b)
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{
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float result;
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if (b == 0.0)
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result = 0.0;
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else
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result = fmod(a, b);
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return result;
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}
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float safe_log(float a, float b)
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{
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if (a < 0.0 || b < 0.0)
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return 0.0;
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return log(a) / log(b);
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}
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shader node_math(
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string type = "Add",
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int Clamp = 0,
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float Value1 = 0.0,
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float Value2 = 0.0,
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output float Value = 0.0)
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{
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/* OSL asin, acos, pow check for values that could give rise to nan */
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if (type == "Add")
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Value = Value1 + Value2;
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else if (type == "Subtract")
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Value = Value1 - Value2;
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else if (type == "Multiply")
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Value = Value1 * Value2;
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else if (type == "Divide")
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Value = safe_divide(Value1, Value2);
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else if (type == "Sine")
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Value = sin(Value1);
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else if (type == "Cosine")
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Value = cos(Value1);
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else if (type == "Tangent")
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Value = tan(Value1);
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else if (type == "Arcsine")
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Value = asin(Value1);
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else if (type == "Arccosine")
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Value = acos(Value1);
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else if (type == "Arctangent")
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Value = atan(Value1);
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else if (type == "Power")
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Value = pow(Value1, Value2);
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else if (type == "Logarithm")
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Value = safe_log(Value1, Value2);
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else if (type == "Minimum")
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Value = min(Value1, Value2);
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else if (type == "Maximum")
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Value = max(Value1, Value2);
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else if (type == "Round")
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Value = floor(Value1 + 0.5);
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else if (type == "Less Than")
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Value = Value1 < Value2;
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else if (type == "Greater Than")
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Value = Value1 > Value2;
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else if (type == "Modulo")
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Value = safe_modulo(Value1, Value2);
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if (Clamp)
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Value = clamp(Value1, 0.0, 1.0);
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}
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