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Fix bug in code -- i must start at 0 to include both endpoints of the line. Consider what happens when step is 0. See https://www.geeksforgeeks.org/dda-line-generation-algorithm-computer-graphics/ for the loop starting with 0 |
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== Program ==
DDA algorithm
<syntaxhighlight lang="
#include <graphics.h>
#include <iostream.h>
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#include <conio.h>
void main(
{
float x,
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dx = (x2 - x1);
dy = (y2 - y1);
if (abs(dx) >= abs(dy))
step = abs(dx);
else
step = abs(dy);
dx = dx / step;
dy = dy / step;
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y = y1;
i = 0;
while (i <= step) {
putpixel(x, y, 5);
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delay(100);
}
getch();
closegraph();
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[[Category:Computer graphics algorithms]]
[[Category:Digital geometry]]
[[Category:Articles with example C++ code]]
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