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Recovered from microbel

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rot
2025-03-05 08:35:31 +01:00
committed by h7x4
commit 88b92402a8
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common/lib/utils/spline.C Normal file
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/*
* PVVMUD a 3D MUD
* Copyright (C) 1998-1999 Programvareverkstedet (pvv@pvv.org)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "pvvmud.H"
#include "spline.H"
////////////////////////////////////////////////////////////////////////////////
//
// CSpline
//
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
// Constructor
CSpline::CSpline(CMatrix * basis){
m_basis = basis;
m_basis->transpose();
}
////////////////////////////////////////////////////////////////////////////////
// interpolate
CVector CSpline::interpolate(double time, ControlVector_t * controlVector){
int size = (*controlVector).size();
if (size < 4) return CVector(0.0,0.0,0.0);
double numSeg = floor(size/4);
double seg = floor(numSeg*time) ;
if (seg == numSeg) seg--;
int start = (int)seg*4;
time = time*numSeg - seg;
CMatrix control((*controlVector)[start],(*controlVector)[start+1],
(*controlVector)[start+2],(*controlVector)[start+3]);
return interpolate(time,control);
}
////////////////////////////////////////////////////////////////////////////////
// interpolate
CVector CSpline::interpolate(double time, CMatrix & control){
CMatrix coefficients = control*(*m_basis);
CVector u(time*time*time,time*time,time,1);
return coefficients*u;
}
////////////////////////////////////////////////////////////////////////////////
//
// CCatmulRom
//
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
// Constructor
CCatmullRom::CCatmullRom(double s)
:CSpline(new CMatrix( -s, 2.0-s, s-2.0, s,
2.0*s, s-3.0, 3.0-2.0*s, -s,
-s, 0.0, s, 0.0,
0.0, 1.0, 0.0, 0.0))
{
}
////////////////////////////////////////////////////////////////////////////////
// addControlVector
void CCatmullRom::addControlVector(CKeyFrame * keyFrame,
const ControlVector_t & controlVector)
{
for (int index = 0; index < (controlVector.size()-3); index++){
keyFrame->addControlVector(controlVector[index]);
keyFrame->addControlVector(controlVector[index+1]);
keyFrame->addControlVector(controlVector[index+2]);
keyFrame->addControlVector(controlVector[index+3]);
}
}
////////////////////////////////////////////////////////////////////////////////
//
// Bezier
//
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
// Constructor
CBezier::CBezier():CSpline(&m_bezier){
}
////////////////////////////////////////////////////////////////////////////////
// addControlVector
void CBezier::addControlVector(CKeyFrame * keyFrame,
const ControlVector_t & controlVector)
{
for (int index = 0; index < ((controlVector.size()-4)/3 +1); index++){
keyFrame->addControlVector(controlVector[index*3]);
keyFrame->addControlVector(controlVector[index*3+1]);
keyFrame->addControlVector(controlVector[index*3+2]);
keyFrame->addControlVector(controlVector[index*3+3]);
}
}
////////////////////////////////////////////////////////////////////////////////
// static basis
CMatrix CBezier::m_bezier( -1.0, 3.0, -3.0, 1.0,
3.0, -6.0, 3.0, 0.0,
-3.0, 3.0, 0.0, 0.0,
1.0, 0.0, 0.0, 0.0);
////////////////////////////////////////////////////////////////////////////////
//
// Hermite
//
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
// Constructor
CHermite::CHermite():CSpline(&m_hermite){
}
////////////////////////////////////////////////////////////////////////////////
// addControlVector
void CHermite::addControlVector(CKeyFrame * keyFrame,
const ControlVector_t & controlVector)
{
for (int index = 0; index < ((controlVector.size()-4)/2 +1); index++){
keyFrame->addControlVector(controlVector[index*2]);
keyFrame->addControlVector(controlVector[index*2+2]);
keyFrame->addControlVector(controlVector[index*2+1]);
keyFrame->addControlVector(controlVector[index*2+3]);
}
}
////////////////////////////////////////////////////////////////////////////////
// static basis
CMatrix CHermite::m_hermite( 2.0, -2.0, 1.0, 1.0,
-3.0, 3.0, -2.0, -1.0,
0.0, 0.0, 1.0, 0.0,
1.0, 0.0, 0.0, 0.0);