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BHcircle

  • Category : CSharp
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  • Update : 2012-11-26
  • Size : 1kb
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  • Author :李***
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Numerical differentiation (DDA) method: set off endpoints P0 (x0, y0), P1 (x1, y1) of the straight line for the L (P0, P1), the slope of the line segment L L abscissa x0 the starting point P0 to the L abscissa of the end of P1 x1 step, take steps = 1 (pixels), with L the linear equation y = kx+ b calculates the corresponding y coordinates, and take the pixel (x, round (y)) as the current point coordinates. As: yi+1 = kxi+1+ b = k1xi+ b+ kDx = yi+ kDx So, when Dx = 1 yi+1 = yi+ k. That is, when each increment x 1, y increases k (ie slope of the line.) According to this principle, we can write the DDA line drawing algorithm program. 2, dotted line method
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BHcircle.cpp
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