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loop 2024-01-07 04:36:33 +00:00
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math/mQuadPatch.cc Normal file
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//-----------------------------------------------------------------------------
// V12 Engine
//
// Copyright (c) 2001 GarageGames.Com
// Portions Copyright (c) 2001 by Sierra Online, Inc.
//-----------------------------------------------------------------------------
#include "Math/mQuadPatch.h"
//******************************************************************************
// Quadratic spline patch
//******************************************************************************
QuadPatch::QuadPatch()
{
setNumReqControlPoints(3);
}
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
void QuadPatch::calcABC( const Point3F *points )
{
a = points[2] - points[1];
b = points[1] - points[0];
c = points[0];
}
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
void QuadPatch::submitControlPoints( SplCtrlPts &points )
{
Parent::submitControlPoints( points );
calcABC( points.getPoint(0) );
};
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
void QuadPatch::setControlPoint( Point3F &point, int index )
{
( (SplCtrlPts*) getControlPoints() )->setPoint( point, index );
calcABC( getControlPoint(0) );
}
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
void QuadPatch::calc( F32 t, Point3F &result )
{
F32 t2 = t*t;
result = a*t2 + b*t + c;
}
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
void QuadPatch::calc( Point3F *points, F32 t, Point3F &result )
{
calcABC( points );
calc( t, result );
}