//----------------------------------------------------------------------------
void NURBSCurveExample::DoSimulation2 ()
{
mSimTime += mSimDelta;
if (!mCircle)
{
NextConfiguration();
}
else
{
// The curve evolves to a line segment.
float t = mSimTime - 1.0f;
float oneMinusT = 1.0f - t;
Vector2f ctrl = oneMinusT*mSpline->GetControlPoint(2) +
t*mSpline->GetControlPoint(1);
mSpline->SetControlPoint(2, ctrl);
// The circle floats up a little bit.
int imax = mCircle->GetNumCtrlPoints();
for (int i = 0; i < imax; ++i)
{
ctrl = mCircle->GetControlPoint(i) + Vector2f::UNIT_Y;
mCircle->SetControlPoint(i, ctrl);
}
}
OnDisplay();
}
//----------------------------------------------------------------------------
bool PolygonDistance::OnKeyDown (unsigned char key, int x, int y)
{
if (WindowApplication2::OnKeyDown(key, x, y))
{
return true;
}
switch (key)
{
case 'g':
NextConfiguration();
OnDisplay();
return true;
case '0':
InitialConfiguration();
OnDisplay();
return true;
case 'p': // toggle for drawing the perpendiculars
mDrawPerpendiculars = !mDrawPerpendiculars;
OnDisplay();
return true;
}
return false;
}
//----------------------------------------------------------------------------
void NURBSCurveExample::DoSimulation2 ()
{
m_fSimTime += m_fSimDelta;
if ( !m_pkCircle )
{
NextConfiguration();
}
else
{
// curve evolves to a line segment
float fT = m_fSimTime - 1.0f, fOmT = 1.0f - fT;
Vector2f kCtrl = fOmT*m_pkSpline->GetControlPoint(2) +
fT*m_pkSpline->GetControlPoint(1);
m_pkSpline->SetControlPoint(2,kCtrl);
// circle floats up a little bit
int iMax = m_pkCircle->GetNumCtrlPoints();
for (int i = 0; i < iMax; i++)
{
kCtrl = m_pkCircle->GetControlPoint(i)+Vector2f::UNIT_Y;
m_pkCircle->SetControlPoint(i,kCtrl);
}
}
OnDisplay();
}
