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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <svx/camera3d.hxx>
Camera3D::Camera3D(const basegfx::B3DPoint& rPos, const basegfx::B3DPoint& rLookAt,
double fFocalLen) :
fBankAngle(0),
bAutoAdjustProjection(true)
{
SetPosition(rPos);
SetLookAt(rLookAt);
SetFocalLength(fFocalLen);
}
Camera3D::Camera3D()
: fFocalLength(35.0)
, fBankAngle(0.0)
, bAutoAdjustProjection(false)
{
}
// Set ViewWindow and adjust PRP
void Camera3D::SetViewWindow(double fX, double fY, double fW, double fH)
{
Viewport3D::SetViewWindow(fX, fY, fW, fH);
if ( bAutoAdjustProjection )
SetFocalLength(fFocalLength);
}
void Camera3D::SetPosition(const basegfx::B3DPoint& rNewPos)
{
if ( rNewPos != aPosition )
{
aPosition = rNewPos;
SetVRP(aPosition);
SetVPN(aPosition - aLookAt);
SetBankAngle(fBankAngle);
}
}
void Camera3D::SetLookAt(const basegfx::B3DPoint& rNewLookAt)
{
if ( rNewLookAt != aLookAt )
{
aLookAt = rNewLookAt;
SetVPN(aPosition - aLookAt);
SetBankAngle(fBankAngle);
}
}
void Camera3D::SetPosAndLookAt(const basegfx::B3DPoint& rNewPos,
const basegfx::B3DPoint& rNewLookAt)
{
if ( rNewPos != aPosition || rNewLookAt != aLookAt )
{
aPosition = rNewPos;
aLookAt = rNewLookAt;
SetVRP(aPosition);
SetVPN(aPosition - aLookAt);
SetBankAngle(fBankAngle);
}
}
void Camera3D::SetBankAngle(double fAngle)
{
basegfx::B3DVector aDiff(aPosition - aLookAt);
basegfx::B3DVector aPrj(aDiff);
fBankAngle = fAngle;
if ( aDiff.getY() == 0 )
{
aPrj.setY(-1.0);
}
else
{ // aPrj = Projection from aDiff on the XZ-plane
aPrj.setY(0.0);
if ( aDiff.getY() < 0.0 )
{
aPrj = -aPrj;
}
}
// Calculate from aDiff to upwards pointing View-Up-Vector
// duplicated line is intentional!
aPrj = aPrj.getPerpendicular(aDiff);
aPrj = aPrj.getPerpendicular(aDiff);
aDiff.normalize();
// Rotate on Z axis, to rotate the BankAngle and back
basegfx::B3DHomMatrix aTf;
const double fV(sqrt(aDiff.getY() * aDiff.getY() + aDiff.getZ() * aDiff.getZ()));
if ( fV != 0.0 )
{
basegfx::B3DHomMatrix aTemp;
const double fSin(aDiff.getY() / fV);
const double fCos(aDiff.getZ() / fV);
aTemp.set(1, 1, fCos);
aTemp.set(2, 2, fCos);
aTemp.set(2, 1, fSin);
aTemp.set(1, 2, -fSin);
aTf *= aTemp;
}
{
basegfx::B3DHomMatrix aTemp;
const double fSin(-aDiff.getX());
const double fCos(fV);
aTemp.set(0, 0, fCos);
aTemp.set(2, 2, fCos);
aTemp.set(0, 2, fSin);
aTemp.set(2, 0, -fSin);
aTf *= aTemp;
}
aTf.rotate(0.0, 0.0, fBankAngle);
{
basegfx::B3DHomMatrix aTemp;
const double fSin(aDiff.getX());
const double fCos(fV);
aTemp.set(0, 0, fCos);
aTemp.set(2, 2, fCos);
aTemp.set(0, 2, fSin);
aTemp.set(2, 0, -fSin);
aTf *= aTemp;
}
if ( fV != 0.0 )
{
basegfx::B3DHomMatrix aTemp;
const double fSin(-aDiff.getY() / fV);
const double fCos(aDiff.getZ() / fV);
aTemp.set(1, 1, fCos);
aTemp.set(2, 2, fCos);
aTemp.set(2, 1, fSin);
aTemp.set(1, 2, -fSin);
aTf *= aTemp;
}
SetVUV(aTf * aPrj);
}
void Camera3D::SetFocalLength(double fLen)
{
if ( fLen < 5 )
fLen = 5;
SetPRP(basegfx::B3DPoint(0.0, 0.0, fLen / 35.0 * aViewWin.W));
fFocalLength = fLen;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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