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Miloslav Ciz 2023-10-30 21:42:20 +01:00
parent 5414a07fa2
commit c25381cf0e
9 changed files with 38 additions and 21 deletions
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10
line.md
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@ -85,7 +85,7 @@ There are many [algorithms](algorithm.md) for line [rasterization](rasterization
XX XX a.
pixel subpixel subpixel accuracy
accuracy accuracy + anti-aliasing
accuracy accuracy + antialiasing
```
One of the most basic line rasterization algorithms is the [DDA](dda.md) (Digital differential analyzer), however it is usually better to use at least the [Bresenham's line algorithm](bresenham.md) which is still simple and considerably improves on DDA by not requiring multiplication or division (slow operations) and by only using integers (no [floating point](float.md)).
@ -128,8 +128,8 @@ void drawLine(int ax, int ay, int bx, int by)
{
drawPixel(ax,ay);
steps--;
*x += stepX;
bx += dy;
if (bx >= dx)
@ -137,8 +137,8 @@ void drawLine(int ax, int ay, int bx, int by)
bx -= dx;
*y += stepY;
}
steps--;
}
}
```
```
To add [antialiasing](antialiasing.md) here you wouldn't just draw one pixel at each step but two, right next to each other, between which you'd distribute the intensity in the ratio given by current error.