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
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/

#include <svx/viewpt3d.hxx>
#include <svx/volume3d.hxx>

Viewport3D::Viewport3D() :
    aVRP(0, 0, 5),
    aVPN(0, 0, 1),
    aVUV(0, 1, 1),
    aPRP(0, 0, 2),
    fVPD(-3),
    fNearClipDist (0.0),
    fFarClipDist (0.0),
    eProjection(PR_PERSPECTIVE),
    eAspectMapping(AS_NO_MAPPING),
    aDeviceRect(Point(0,0), Size(-1,-1)),
    aViewPoint (0, 0, 5000),
    bTfValid(0),
    fWRatio (1.0),
    fHRatio (1.0)
{
    aViewWin.X = -1; aViewWin.Y = -1;
    aViewWin.W =  2; aViewWin.H = 2;
}

// Set ViewWindow (in View coordinates)

void Viewport3D::SetViewWindow(double fX, double fY, double fW, double fH)
{
    aViewWin.X = fX;
    aViewWin.Y = fY;
    if ( fW > 0 )   aViewWin.W = fW;
    else            aViewWin.W = 1.0;
    if ( fH > 0 )   aViewWin.H = fH;
    else            aViewWin.H = 1.0;

    fWRatio = aDeviceRect.GetWidth() / aViewWin.W;
    fHRatio = aDeviceRect.GetHeight() / aViewWin.H;
}

// Returns observer position (PRP) in world coordinates

const basegfx::B3DPoint& Viewport3D::GetViewPoint()
{
    MakeTransform();

    return aViewPoint;
}

// Calculate View transformations matrix

void Viewport3D::MakeTransform(void)
{
    if ( !bTfValid )
    {
        double fV, fXupVp, fYupVp;
        aViewPoint = aVRP + aVPN * aPRP.getZ();

        // Reset to Identity matrix
        aViewTf.identity();

        // shift in the origin
        aViewTf.translate(-aVRP.getX(), -aVRP.getY(), -aVRP.getZ());

        // fV = Length of the projection of aVPN on the yz plane:
        fV = aVPN.getYZLength();

        if ( fV != 0 )
        {
            basegfx::B3DHomMatrix aTemp;
            const double fSin(aVPN.getY() / fV);
            const double fCos(aVPN.getZ() / fV);
            aTemp.set(2, 2, fCos);
            aTemp.set(1, 1, fCos);
            aTemp.set(2, 1, fSin);
            aTemp.set(1, 2, -fSin);
            aViewTf *= aTemp;
        }

        {
            basegfx::B3DHomMatrix aTemp;
            const double fSin(-aVPN.getX());
            const double fCos(fV);
            aTemp.set(2, 2, fCos);
            aTemp.set(0, 0, fCos);
            aTemp.set(0, 2, fSin);
            aTemp.set(2, 0, -fSin);
            aViewTf *= aTemp;
        }

        // Convert X- and Y- coordinates of the view up vector to the
        // (preliminary) view coordinate system.
        fXupVp = aViewTf.get(0, 0) * aVUV.getX() + aViewTf.get(0, 1) * aVUV.getY() + aViewTf.get(0, 2) * aVUV.getZ();
        fYupVp = aViewTf.get(1, 0) * aVUV.getX() + aViewTf.get(1, 1) * aVUV.getY() + aViewTf.get(1, 2) * aVUV.getZ();
        fV = sqrt(fXupVp * fXupVp + fYupVp * fYupVp);

        if ( fV != 0 )
        {
            basegfx::B3DHomMatrix aTemp;
            const double fSin(fXupVp / fV);
            const double fCos(fYupVp / fV);
            aTemp.set(1, 1, fCos);
            aTemp.set(0, 0, fCos);
            aTemp.set(1, 0, fSin);
            aTemp.set(0, 1, -fSin);
            aViewTf *= aTemp;
        }

        bTfValid = sal_True;
    }
}

void Viewport3D::SetDeviceWindow(const Rectangle& rRect)
{
    long nNewW = rRect.GetWidth();
    long nNewH = rRect.GetHeight();
    long nOldW = aDeviceRect.GetWidth();
    long nOldH = aDeviceRect.GetHeight();

    switch ( eAspectMapping )
    {
        double  fRatio, fTmp;<--- Variable 'fRatio' is assigned a value that is never used

        // Mapping, without changing the real size of the objects in the
        // Device Window
        case AS_HOLD_SIZE:
            // When the Device is invalid (w, h = -1), adapt the  View
            // with AsHoldX
            if ( nOldW > 0 && nOldH > 0 )
            {
                fRatio = (double) nNewW / nOldW;
                aViewWin.X *= fRatio;
                aViewWin.W *= fRatio;
                fRatio = (double) nNewH / nOldH;
                aViewWin.Y *= fRatio;
                aViewWin.H *= fRatio;
                break;
            }
        case AS_HOLD_X:
            // Adapt view height to view width
            fRatio = (double) nNewH / nNewW;
            fTmp = aViewWin.H;
            aViewWin.H = aViewWin.W * fRatio;
            aViewWin.Y = aViewWin.Y * aViewWin.H / fTmp;
            break;

        case AS_HOLD_Y:
            // Adapt view width to view height
            fRatio = (double) nNewW / nNewH;
            fTmp = aViewWin.W;
            aViewWin.W = aViewWin.H * fRatio;
            aViewWin.X = aViewWin.X * aViewWin.W / fTmp;
            break;
        default: break;
    }
    fWRatio = nNewW / aViewWin.W;
    fHRatio = nNewH / aViewWin.H;

    aDeviceRect = rRect;
}

// Set View Reference Point

void Viewport3D::SetVRP(const basegfx::B3DPoint& rNewVRP)
{
    aVRP = rNewVRP;
    bTfValid = sal_False;
}

// Set View Plane Normal

void Viewport3D::SetVPN(const basegfx::B3DVector& rNewVPN)
{
    aVPN = rNewVPN;
    aVPN.normalize();
    bTfValid = sal_False;
}

// Set View Up Vector

void Viewport3D::SetVUV(const basegfx::B3DVector& rNewVUV)
{
    aVUV = rNewVUV;
    bTfValid = sal_False;
}

// Set Center Of Projection

void Viewport3D::SetPRP(const basegfx::B3DPoint& rNewPRP)
{
    aPRP = rNewPRP;
    aPRP.setX(0.0);
    aPRP.setY(0.0);
    bTfValid = sal_False;
}

// Set View Plane Distance

void Viewport3D::SetVPD(double fNewVPD)
{
    fVPD = fNewVPD;
    bTfValid = sal_False;
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */