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VC6.0 

 

 

 

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#include <math.h> 

inline int round (const float a){return int(a+0.5);}//

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void DDAline(int x0,int y0,int xEnd,int yEnd,CDC* pDC)//DDA

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{ 

 

int dx=xEnd-x0, dy=yEnd-y0,steps,k; 

 

float xIncrement, yIncrement, x=x0, y=y0; 

 

if(fabs(dx)>fabs(dy)) 

 

 

steps=fabs(dx); 

 

else 

 

 

steps=fabs(dy); 

 

xIncrement=float(dx)/float(steps); 

 

yIncrement=float(dy)/float(steps); 

 

pDC->SetPixel(round(x),round(y),RGB(255,0,0)); 

 

for(k=0;k<steps;k++){ 

 

 

x+=xIncrement; 

 

 

y+=yIncrement; 

 

 

pDC->SetPixel(round(x),round(y),RGB(255,0,0)); 

 

}