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// Copyright (c) 1997 Philip A. Hardin (pahardin@cs.utexas.edu)
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License v2 or later.
#include "view.h"
/*=========================================================================*/
view& view::Copy(const view& v) {
maxPts= numPts= v.numPts;
modelToView= v.modelToView;
shape= v.shape;
if (maxPts >0) {
pts= new pt3d[maxPts];
forii(numPts) pts[i]=v.pts[i];
}
return *this;
}
/*-------------------------------------------------------------------------*/
// In: mtv= new modelToView transformation matrix
void view::Update(xregion3d *newShape, const tmtrx& newMtv) {
// if the shape has changed and the new shape has more pts than
// the old one, allocate an adequately large array of pts
if (newShape != shape) {
numPts= newShape->pts.Num();
if (numPts >maxPts) {
if (maxPts >0) delete [] pts;
maxPts= numPts;
pts= new pt3d[maxPts];
}
}
if (newShape != shape || !modelToView.RotationSame(newMtv)) {
newShape->TransformTo(newMtv,pts);
}
else {
pt3d delta= newMtv.Cart() - modelToView.Cart();
if (delta != pt3d(0,0,0)) {
forii(newShape->pts.Num())
pts[i] += delta;
}
}
modelToView= newMtv;
shape= newShape;
}
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