Line data Source code
1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #include <svx/camera3d.hxx>
21 : #include <tools/stream.hxx>
22 :
23 1406 : Camera3D::Camera3D(const basegfx::B3DPoint& rPos, const basegfx::B3DPoint& rLookAt,
24 : double fFocalLen, double fBankAng) :
25 : aResetPos(rPos),
26 : aResetLookAt(rLookAt),
27 : fResetFocalLength(fFocalLen),
28 : fResetBankAngle(fBankAng),
29 : fBankAngle(fBankAng),
30 1406 : bAutoAdjustProjection(true)
31 : {
32 1406 : SetVPD(0);
33 1406 : SetPosition(rPos);
34 1406 : SetLookAt(rLookAt);
35 1406 : SetFocalLength(fFocalLen);
36 1406 : }
37 :
38 0 : Camera3D::Camera3D()
39 : : fResetFocalLength(0.0)
40 : , fResetBankAngle(0.0)
41 : , fFocalLength(0.0)
42 : , fBankAngle(0.0)
43 0 : , bAutoAdjustProjection(false)
44 : {
45 0 : basegfx::B3DPoint aVector3D(0.0 ,0.0 ,1.0);
46 0 : Camera3D(aVector3D, basegfx::B3DPoint());
47 0 : }
48 :
49 : // Set default values for reset
50 :
51 1406 : void Camera3D::SetDefaults(const basegfx::B3DPoint& rPos, const basegfx::B3DPoint& rLookAt,
52 : double fFocalLen, double fBankAng)
53 : {
54 1406 : aResetPos = rPos;
55 1406 : aResetLookAt = rLookAt;
56 1406 : fResetFocalLength = fFocalLen;
57 1406 : fResetBankAngle = fBankAng;
58 1406 : }
59 :
60 : // Set ViewWindow and adjust PRP
61 :
62 2812 : void Camera3D::SetViewWindow(double fX, double fY, double fW, double fH)
63 : {
64 2812 : Viewport3D::SetViewWindow(fX, fY, fW, fH);
65 2812 : if ( bAutoAdjustProjection )
66 1406 : SetFocalLength(fFocalLength);
67 2812 : }
68 :
69 2849 : void Camera3D::SetPosition(const basegfx::B3DPoint& rNewPos)
70 : {
71 2849 : if ( rNewPos != aPosition )
72 : {
73 2849 : aPosition = rNewPos;
74 2849 : SetVRP(aPosition);
75 2849 : SetVPN(aPosition - aLookAt);
76 2849 : SetBankAngle(fBankAngle);
77 : }
78 2849 : }
79 :
80 1406 : void Camera3D::SetLookAt(const basegfx::B3DPoint& rNewLookAt)
81 : {
82 1406 : if ( rNewLookAt != aLookAt )
83 : {
84 0 : aLookAt = rNewLookAt;
85 0 : SetVPN(aPosition - aLookAt);
86 0 : SetBankAngle(fBankAngle);
87 : }
88 1406 : }
89 :
90 1406 : void Camera3D::SetPosAndLookAt(const basegfx::B3DPoint& rNewPos,
91 : const basegfx::B3DPoint& rNewLookAt)
92 : {
93 1406 : if ( rNewPos != aPosition || rNewLookAt != aLookAt )
94 : {
95 1406 : aPosition = rNewPos;
96 1406 : aLookAt = rNewLookAt;
97 :
98 1406 : SetVRP(aPosition);
99 1406 : SetVPN(aPosition - aLookAt);
100 1406 : SetBankAngle(fBankAngle);
101 : }
102 1406 : }
103 :
104 4255 : void Camera3D::SetBankAngle(double fAngle)
105 : {
106 4255 : basegfx::B3DVector aDiff(aPosition - aLookAt);
107 8510 : basegfx::B3DVector aPrj(aDiff);
108 4255 : fBankAngle = fAngle;
109 :
110 4255 : if ( aDiff.getY() == 0 )
111 : {
112 4255 : aPrj.setY(-1.0);
113 : }
114 : else
115 : { // aPrj = Projection from aDiff on the XZ-plane
116 0 : aPrj.setY(0.0);
117 :
118 0 : if ( aDiff.getY() < 0.0 )
119 : {
120 0 : aPrj = -aPrj;
121 : }
122 : }
123 :
124 : // Calculate from aDiff to uppwards pointing View-Up-Vector
125 : // duplicated line is intentional!
126 4255 : aPrj = aPrj.getPerpendicular(aDiff);
127 4255 : aPrj = aPrj.getPerpendicular(aDiff);
128 4255 : aDiff.normalize();
129 :
130 : // Rotate on Z axis, to rotate the BankAngle and back
131 8510 : basegfx::B3DHomMatrix aTf;
132 4255 : const double fV(sqrt(aDiff.getY() * aDiff.getY() + aDiff.getZ() * aDiff.getZ()));
133 :
134 4255 : if ( fV != 0.0 )
135 : {
136 4255 : basegfx::B3DHomMatrix aTemp;
137 4255 : const double fSin(aDiff.getY() / fV);
138 4255 : const double fCos(aDiff.getZ() / fV);
139 :
140 4255 : aTemp.set(1, 1, fCos);
141 4255 : aTemp.set(2, 2, fCos);
142 4255 : aTemp.set(2, 1, fSin);
143 4255 : aTemp.set(1, 2, -fSin);
144 :
145 4255 : aTf *= aTemp;
146 : }
147 :
148 : {
149 4255 : basegfx::B3DHomMatrix aTemp;
150 4255 : const double fSin(-aDiff.getX());
151 4255 : const double fCos(fV);
152 :
153 4255 : aTemp.set(0, 0, fCos);
154 4255 : aTemp.set(2, 2, fCos);
155 4255 : aTemp.set(0, 2, fSin);
156 4255 : aTemp.set(2, 0, -fSin);
157 :
158 4255 : aTf *= aTemp;
159 : }
160 :
161 4255 : aTf.rotate(0.0, 0.0, fBankAngle);
162 :
163 : {
164 4255 : basegfx::B3DHomMatrix aTemp;
165 4255 : const double fSin(aDiff.getX());
166 4255 : const double fCos(fV);
167 :
168 4255 : aTemp.set(0, 0, fCos);
169 4255 : aTemp.set(2, 2, fCos);
170 4255 : aTemp.set(0, 2, fSin);
171 4255 : aTemp.set(2, 0, -fSin);
172 :
173 4255 : aTf *= aTemp;
174 : }
175 :
176 4255 : if ( fV != 0.0 )
177 : {
178 4255 : basegfx::B3DHomMatrix aTemp;
179 4255 : const double fSin(-aDiff.getY() / fV);
180 4255 : const double fCos(aDiff.getZ() / fV);
181 :
182 4255 : aTemp.set(1, 1, fCos);
183 4255 : aTemp.set(2, 2, fCos);
184 4255 : aTemp.set(2, 1, fSin);
185 4255 : aTemp.set(1, 2, -fSin);
186 :
187 4255 : aTf *= aTemp;
188 : }
189 :
190 8510 : SetVUV(aTf * aPrj);
191 4255 : }
192 :
193 5624 : void Camera3D::SetFocalLength(double fLen)
194 : {
195 5624 : if ( fLen < 5 )
196 1406 : fLen = 5;
197 5624 : SetPRP(basegfx::B3DPoint(0.0, 0.0, fLen / 35.0 * aViewWin.W));
198 5624 : fFocalLength = fLen;
199 5624 : }
200 :
201 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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