1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
|
/****************************************************************************
* colour.h
*
* This module contains all defines, typedefs, and prototypes for COLOUR.CPP.
*
* from Persistence of Vision(tm) Ray Tracer version 3.6.
* Copyright 1991-2003 Persistence of Vision Team
* Copyright 2003-2004 Persistence of Vision Raytracer Pty. Ltd.
*---------------------------------------------------------------------------
* NOTICE: This source code file is provided so that users may experiment
* with enhancements to POV-Ray and to port the software to platforms other
* than those supported by the POV-Ray developers. There are strict rules
* regarding how you are permitted to use this file. These rules are contained
* in the distribution and derivative versions licenses which should have been
* provided with this file.
*
* These licences may be found online, linked from the end-user license
* agreement that is located at http://www.povray.org/povlegal.html
*---------------------------------------------------------------------------
* This program is based on the popular DKB raytracer version 2.12.
* DKBTrace was originally written by David K. Buck.
* DKBTrace Ver 2.0-2.12 were written by David K. Buck & Aaron A. Collins.
*---------------------------------------------------------------------------
* $File: //depot/povray/3.6-release/source/colour.h $
* $Revision: #2 $
* $Change: 2939 $
* $DateTime: 2004/07/04 13:43:26 $
* $Author: root $
* $Log$
*****************************************************************************/
/* NOTE: FRAME.H contains other colour stuff. */
#ifndef COLOUR_H
#define COLOUR_H
BEGIN_POV_NAMESPACE
/*****************************************************************************
* Global preprocessor defines
******************************************************************************/
#define RED2GRAY 0.297
#define GREEN2GRAY 0.589
#define BLUE2GRAY 0.114
#define GREY_SCALE3(CR,CG,CB) (RED2GRAY*(CR) + GREEN2GRAY*(CG) + BLUE2GRAY*(CB))
#define GREY_SCALE(C) GREY_SCALE3((C)[pRED],(C)[pGREEN],(C)[pBLUE])
/*****************************************************************************
* Global typedefs
******************************************************************************/
/*****************************************************************************
* Global variables
******************************************************************************/
/*****************************************************************************
* Global functions
******************************************************************************/
COLOUR *Create_Colour (void);
COLOUR *Copy_Colour (COLOUR Old);
BLEND_MAP_ENTRY *Create_BMap_Entries (int Map_Size);
BLEND_MAP_ENTRY *Copy_BMap_Entries (BLEND_MAP_ENTRY *Old,int Map_Size,int Type);
BLEND_MAP *Create_Blend_Map (void);
BLEND_MAP *Copy_Blend_Map (BLEND_MAP *Old);
DBL Colour_Distance (COLOUR colour1, COLOUR colour2);
DBL Colour_Distance_RGBT (COLOUR colour1, COLOUR colour2);
void Add_Colour (COLOUR result, COLOUR colour1, COLOUR colour2);
void Scale_Colour (COLOUR result, COLOUR colour, DBL factor);
void Clip_Colour (COLOUR result, COLOUR colour);
void Destroy_Blend_Map (BLEND_MAP *BMap);
DBL RGBtoHue( COLOUR c );
/*****************************************************************************
* Inline functions
******************************************************************************/
// Add a scaled colour.
// v = v1 + k * v2;
// v += k * v2;
inline void CRGBAddScaledEq(COLOUR v, COLC k, const COLOUR v2)
{
v[X] += k * v2[X];
v[Y] += k * v2[Y];
v[Z] += k * v2[Z];
}
// Linear combination of 2 colours. [CEY]
// c = k1 * c1 + k2 * c2
inline void CLinComb2(COLOUR c, COLC k1, const COLOUR c1, COLC k2, const COLOUR c2)
{
c[pRED] = k1 * c1[pRED] + k2 * c2[pRED];
c[pGREEN] = k1 * c1[pGREEN] + k2 * c2[pGREEN];
c[pBLUE] = k1 * c1[pBLUE] + k2 * c2[pBLUE];
c[pFILTER] = k1 * c1[pFILTER] + k2 * c2[pFILTER];
c[pTRANSM] = k1 * c1[pTRANSM] + k2 * c2[pTRANSM];
}
inline void CRGBLinComb2(COLOUR c, COLC k1, const COLOUR c1, COLC k2, const COLOUR c2)
{
c[X] = k1 * c1[X] + k2 * c2[X];
c[Y] = k1 * c1[Y] + k2 * c2[Y];
c[Z] = k1 * c1[Z] + k2 * c2[Z];
}
END_POV_NAMESPACE
#endif
|
