157 lines
5.3 KiB
C
157 lines
5.3 KiB
C
/*
|
|
* 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);
|
|
|