1 /**
2  * Mandelbulber v2, a 3D fractal generator       ,=#MKNmMMKmmßMNWy,
3  *                                             ,B" ]L,,p%%%,,,§;, "K
4  * Copyright (C) 2016-21 Mandelbulber Team     §R-==%w["'~5]m%=L.=~5N
5  *                                        ,=mm=§M ]=4 yJKA"/-Nsaj  "Bw,==,,
6  * This file is part of Mandelbulber.    §R.r= jw",M  Km .mM  FW ",§=ß., ,TN
7  *                                     ,4R =%["w[N=7]J '"5=],""]]M,w,-; T=]M
8  * Mandelbulber is free software:     §R.ß~-Q/M=,=5"v"]=Qf,'§"M= =,M.§ Rz]M"Kw
9  * you can redistribute it and/or     §w "xDY.J ' -"m=====WeC=\ ""%""y=%"]"" §
10  * modify it under the terms of the    "§M=M =D=4"N #"%==A%p M§ M6  R' #"=~.4M
11  * GNU General Public License as        §W =, ][T"]C  §  § '§ e===~ U  !§[Z ]N
12  * published by the                    4M",,Jm=,"=e~  §  §  j]]""N  BmM"py=ßM
13  * Free Software Foundation,          ]§ T,M=& 'YmMMpM9MMM%=w=,,=MT]M m§;'§,
14  * either version 3 of the License,    TWw [.j"5=~N[=§%=%W,T ]R,"=="Y[LFT ]N
15  * or (at your option)                   TW=,-#"%=;[  =Q:["V""  ],,M.m == ]N
16  * any later version.                      J§"mr"] ,=,," =="""J]= M"M"]==ß"
17  *                                          §= "=C=4 §"eM "=B:m|4"]#F,§~
18  * Mandelbulber is distributed in            "9w=,,]w em%wJ '"~" ,=,,ß"
19  * the hope that it will be useful,                 . "K=  ,=RMMMßM"""
20  * but WITHOUT ANY WARRANTY;                            .'''
21  * without even the implied warranty
22  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
23  *
24  * See the GNU General Public License for more details.
25  * You should have received a copy of the GNU General Public License
26  * along with Mandelbulber. If not, see <http://www.gnu.org/licenses/>.
27  *
28  * ###########################################################################
29  *
30  * Authors: Krzysztof Marczak (buddhi1980@gmail.com)
31  *
32  * 3d projection functions - CalculateViewVector() and InvProjection3D()
33  *
34  * perspective based view vector calculation
35  */
36 
37 #ifndef MANDELBULBER2_SRC_PROJECTION_3D_HPP_
38 #define MANDELBULBER2_SRC_PROJECTION_3D_HPP_
39 
40 #include "algebra.hpp"
41 
42 namespace params
43 {
44 enum enumPerspectiveType
45 {
46 	perspThreePoint = 0,
47 	perspFishEye = 1,
48 	perspEquirectangular = 2,
49 	perspFishEyeCut = 3
50 };
51 }
52 
53 double CalcFOV(double fovDeegres, params::enumPerspectiveType perspType);
54 
55 CVector3 InvProjection3D(const CVector3 &point, const CVector3 &camera,
56 	const CRotationMatrix &mRotInv, params::enumPerspectiveType perspectiveType, double fov,
57 	double imgWidth, double imgHeight);
58 CVector3 CalculateViewVector(CVector2<double> normalizedPoint, double fov,
59 	params::enumPerspectiveType perspType, const CRotationMatrix &mRot);
60 
61 #endif /* MANDELBULBER2_SRC_PROJECTION_3D_HPP_ */
62