forked from bartvdbraak/blender
30bffb5a3a
This works for Cycles, Eevee, texture nodes and compositing. It helps to reduce the number of math nodes required in various node setups. Differential Revision: https://developer.blender.org/D3537
125 lines
2.7 KiB
Plaintext
125 lines
2.7 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_sqrt(float a)
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{
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float result;
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if (a > 0.0)
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result = sqrt(a);
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else
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result = 0.0;
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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 use_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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else if (type == "absolute")
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Value = fabs(Value1);
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else if (type == "arctan2")
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Value = atan2(Value1, Value2);
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else if (type == "floor")
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Value = floor(Value1);
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else if (type == "ceil")
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Value = ceil(Value1);
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else if (type == "fract")
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Value = Value1 - floor(Value1);
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else if (type == "sqrt")
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Value = safe_sqrt(Value1);
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if (use_clamp)
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Value = clamp(Value, 0.0, 1.0);
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}
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