DDA Algorithm

DDAAlgorithm.cpp

#include <stdio.h>
#include <graphics.h>
#include <math.h>
int max(int a, int b) {return a > b ? a : b;}
int main(int argc, char const *argv[])
{
	int gd = DETECT, gm;
	initgraph(&gd, &gm, "DDA Line Drawing");
	int x1, y1, x2, y2;
	x1 = 5, y1 = 5, x2 = 32, y2 = 54;
	int dx = x2 - x1;
	int dy = y2 - y1;
	int steps = max(dx, dy);
	float x_inc = dx * 1.0 / (steps * 1.0);
	float y_inc = dy * 1.0 / (steps * 1.0);
	float x = x1, y = y1;
	putpixel(abs(x), abs(y), WHITE);
	for (int i = 0; i < steps; ++i)
	{
		x += x_inc;
		y += y_inc;
		putpixel(x, y, WHITE);
	}
	delay(5000);
	line(x1, y1, x2, y2);
	getch();
	return 0;
}