Program to Draw Line using DDA Algorithm in C
#include <stdio.h> #include <conio.h> #include <graphics.h> void DDA(int, int, int, int); void main() { int x1, y1, xn, yn; int gd = DETECT, gm; initgraph(&gd, &gm, "C:\\TC\\BGI"); printf("Enter the starting coordinates of line: "); scanf("%d %d", &x1, &y1); printf("Enter the ending coordinates of line: "); scanf("%d %d", &xn, &yn); DDA(x1, y1, xn, yn); getch(); } void DDA(int x1, int y1, int xn, int yn) { int dx, dy, m, i; m = (yn-y1)/(xn-x1); for (i=x1; i<=xn; i++) { if (m <= 1) { dx = 1; dy = m * dx; } else { dy = 1; dx = dy / m; } x1 = x1 + dx; y1 = y1 + dy; putpixel(x1, y1, 10); delay(50); } }
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