Lukas Stockner
6862762685
The Math node currently has the normal atan() function, but for actual angles this is fairly useless without additional nodes to handle the signs. Since the node has two inputs anyways, it only makes sense to add an arctan2 option. Reviewers: sergey, brecht Differential Revision: https://developer.blender.org/D3430
105 lines
2.3 KiB
Plaintext
105 lines
2.3 KiB
Plaintext
/*
|
|
* 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"
|
|
|
|
float safe_divide(float a, float b)
|
|
{
|
|
float result;
|
|
|
|
if (b == 0.0)
|
|
result = 0.0;
|
|
else
|
|
result = a / b;
|
|
|
|
return result;
|
|
}
|
|
|
|
float safe_modulo(float a, float b)
|
|
{
|
|
float result;
|
|
|
|
if (b == 0.0)
|
|
result = 0.0;
|
|
else
|
|
result = fmod(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 use_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;
|
|
else if (type == "subtract")
|
|
Value = Value1 - Value2;
|
|
else if (type == "multiply")
|
|
Value = Value1 * Value2;
|
|
else if (type == "divide")
|
|
Value = safe_divide(Value1, Value2);
|
|
else if (type == "sine")
|
|
Value = sin(Value1);
|
|
else if (type == "cosine")
|
|
Value = cos(Value1);
|
|
else if (type == "tangent")
|
|
Value = tan(Value1);
|
|
else if (type == "arcsine")
|
|
Value = asin(Value1);
|
|
else if (type == "arccosine")
|
|
Value = acos(Value1);
|
|
else if (type == "arctangent")
|
|
Value = atan(Value1);
|
|
else if (type == "power")
|
|
Value = pow(Value1, Value2);
|
|
else if (type == "logarithm")
|
|
Value = safe_log(Value1, Value2);
|
|
else if (type == "minimum")
|
|
Value = min(Value1, Value2);
|
|
else if (type == "maximum")
|
|
Value = max(Value1, Value2);
|
|
else if (type == "round")
|
|
Value = floor(Value1 + 0.5);
|
|
else if (type == "less_than")
|
|
Value = Value1 < Value2;
|
|
else if (type == "greater_than")
|
|
Value = Value1 > Value2;
|
|
else if (type == "modulo")
|
|
Value = safe_modulo(Value1, Value2);
|
|
else if (type == "absolute")
|
|
Value = fabs(Value1);
|
|
else if (type == "arctan2")
|
|
Value = atan2(Value1, Value2);
|
|
|
|
if (use_clamp)
|
|
Value = clamp(Value, 0.0, 1.0);
|
|
}
|
|
|