1 | /*****************************************************************************/ |
2 | // Copyright 2006-2007 Adobe Systems Incorporated |
3 | // All Rights Reserved. |
4 | // |
5 | // NOTICE: Adobe permits you to use, modify, and distribute this file in |
6 | // accordance with the terms of the Adobe license agreement accompanying it. |
7 | /*****************************************************************************/ |
8 | |
9 | /* $Id: //mondo/dng_sdk_1_4/dng_sdk/source/dng_spline.h#1 $ */ |
10 | /* $DateTime: 2012/05/30 13:28:51 $ */ |
11 | /* $Change: 832332 $ */ |
12 | /* $Author: tknoll $ */ |
13 | |
14 | /*****************************************************************************/ |
15 | |
16 | #ifndef __dng_spline__ |
17 | #define __dng_spline__ |
18 | |
19 | /*****************************************************************************/ |
20 | |
21 | #include "dng_1d_function.h" |
22 | #include "dng_memory.h" |
23 | |
24 | #include <vector> |
25 | |
26 | /*****************************************************************************/ |
27 | |
28 | inline real64 EvaluateSplineSegment (real64 x, |
29 | real64 x0, |
30 | real64 y0, |
31 | real64 s0, |
32 | real64 x1, |
33 | real64 y1, |
34 | real64 s1) |
35 | { |
36 | |
37 | real64 A = x1 - x0; |
38 | |
39 | real64 B = (x - x0) / A; |
40 | |
41 | real64 C = (x1 - x) / A; |
42 | |
43 | real64 D = ((y0 * (2.0 - C + B) + (s0 * A * B)) * (C * C)) + |
44 | ((y1 * (2.0 - B + C) - (s1 * A * C)) * (B * B)); |
45 | |
46 | return D; |
47 | |
48 | } |
49 | |
50 | /*****************************************************************************/ |
51 | |
52 | class dng_spline_solver: public dng_1d_function |
53 | { |
54 | |
55 | protected: |
56 | |
57 | dng_std_vector<real64> X; |
58 | dng_std_vector<real64> Y; |
59 | |
60 | dng_std_vector<real64> S; |
61 | |
62 | public: |
63 | |
64 | dng_spline_solver (); |
65 | |
66 | virtual ~dng_spline_solver (); |
67 | |
68 | void Reset (); |
69 | |
70 | void Add (real64 x, real64 y); |
71 | |
72 | virtual void Solve (); |
73 | |
74 | virtual bool IsIdentity () const; |
75 | |
76 | virtual real64 Evaluate (real64 x) const; |
77 | |
78 | }; |
79 | |
80 | /*****************************************************************************/ |
81 | |
82 | #endif |
83 | |
84 | /*****************************************************************************/ |
85 | |