Cortex  10.0.0-a4
Math.h
Go to the documentation of this file.
1 //
3 // Copyright (c) 2008, Image Engine Design Inc. All rights reserved.
4 //
5 // Redistribution and use in source and binary forms, with or without
6 // modification, are permitted provided that the following conditions are
7 // met:
8 //
9 // * Redistributions of source code must retain the above copyright
10 // notice, this list of conditions and the following disclaimer.
11 //
12 // * Redistributions in binary form must reproduce the above copyright
13 // notice, this list of conditions and the following disclaimer in the
14 // documentation and/or other materials provided with the distribution.
15 //
16 // * Neither the name of Image Engine Design nor the names of any
17 // other contributors to this software may be used to endorse or
18 // promote products derived from this software without specific prior
19 // written permission.
20 //
21 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
22 // IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
23 // THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
25 // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
26 // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27 // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
28 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 //
34 
38 
39 #ifndef IECORE_MATH_H
40 #define IECORE_MATH_H
41 
42 #include <cmath>
43 
44 namespace IECore
45 {
46 
47 // M_PI isn't part of the C++ standard, and as such is
48 // not available by default in MSVC.
49 #ifndef M_PI
50 #define M_PI 3.14159265358979323846264338327950288
51 #endif
52 
54 template<typename T>
55 int sign( T x );
56 
58 template<typename T>
59 T smoothstep( T v0, T v1, T x );
60 
61 } // namespace IECore
62 
63 #include "IECore/Math.inl"
64 
65 #endif // IECORE_MATH_H
int sign(T x)
Returns -1 for negative numbers, 1 for positive, and 0 for 0.
T smoothstep(T v0, T v1, T x)
Computes smoothstep function from Ken Perlin's original noise implementation.
This namespace contains all components of the core library.
Definition: AddSmoothSkinningInfluencesOp.h:43