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#ifndef ELIPSEBRUSH_H_
#define ELIPSEBRUSH_H_
#include <cmath>
#include "Brush.h"
class EllipseBrush: public Brush
{
public:
EllipseBrush(ui::Point size_):
Brush(size_)
{
SetRadius(size_);
};
virtual void GenerateBitmap()
{
if(bitmap)
delete[] bitmap;
bitmap = new unsigned char[size.X*size.Y];
int rx = radius.X;
int ry = radius.Y;
if (!rx)
{
for (int j = 0; j <= 2*ry; j++)
{
bitmap[j*(size.X)+rx] = 255;
}
}
else
{
int yTop = ry+1, yBottom, i, j;
for (i = 0; i <= rx; i++)
{
while (pow(i-rx,2.0)*pow(ry,2.0) + pow(yTop-ry,2.0)*pow(rx,2.0) <= pow(rx,2.0)*pow(ry,2.0))
yTop++;
yBottom = 2*ry - yTop;
for (int j = 0; j <= ry*2; j++)
{
if (j > yBottom && j < yTop)
{
bitmap[j*(size.X)+i] = 255;
bitmap[j*(size.X)+2*rx-i] = 255;
}
else
{
bitmap[j*(size.X)+i] = 0;
bitmap[j*(size.X)+2*rx-i] = 0;
}
}
}
}
}
};
#endif /* ELIPSEBRUSH_H_ */
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