计算机图形学（二）输出图元_3_画线算法_2_DDA算法

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#include <stdlib.h>
#include <math.h>

inline int round(const float a) {return int (a + 0.5);}
void lineDDA(int x0,int y0,int xEnd,int yEnd){
     int dx = xEnd - x0, dy = yEnd - y0,steps, k ;
	float xIncrement, yIncrement,x = x0,y = y0;
	if(fabs(dx)>fabs(dr))
	   steps = fabs(dx);
	else
		steps = fabs(dy);
	xIncrement = float (dx) / float (steps);
	yIncrement = float (dy) / float (steps);
	
	setPixel (round(x),round(y));
	for(k = 0;k<steps;k++){
	    x += xIncrement;
	    y += yIncrement;
		setPixel(round(x),round(y));
	}
	

}

计算机图形学（二）输出图元_3_画线算法_2_DDA算法

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原文地址：http://blog.csdn.net/heyuchang666/article/details/51162259