Have somebody implemented thick line algorithm?

[HSE]

Hi!

I'm fighting a little with Murphy's algorithm... but without success  :icon13:.

Perhaps somebody  :icon14:? (whatever thick line algorithm)

[caballero]

Yes, I did it. Bresenham line algorithm

[Biterider]

Hello HSE
ObjAsm32 has an object called Pixelmap that supports subpixel drawing.   :idea:
The width of a line can be easily achieved by painting adjacent pixels using Besenham, WU, or other similar algos.
I have slightly modified the demo application to draw wider lines (vertical line with 3 px and inner circle with 2 px)
I attach the new exe.  ;)

Biterider

[jj2007]

What's wrong with Gdi+ thick lines?

[caballero]

GDI/GDI+ routines are quite slow for making some time critical routines like demos

[FORTRANS]

Hi,

   When I made a general purpose line drawing routine, it used
a pixel routine to draw pixels on the screen.  By using different
pixel routines, you got different effects.  Black to draw.  White
to erase.  And then patterned pixels for dashed lines and fat
pixels for thick lines.  Certainly wasn't the fastest, but wasn't
really the slowest either.  Except maybe for the fat pixels.

   Faster line routines set the pixel as part of the line drawing
algorithm.  Not as a separate pixel routine.

HTH,

Steve N.

[daydreamer]

it depends on what you mean: line with just bigger fat size,its just easy to output more pixels in pixel macro/proc and call it from line algo
or nicerlooking search for antialiased bresenham,make code that puts some grey pixels around white line or darker shade of color of the line,especially where the sawshaped line looks worst

[HSE]

Yes, I did it. Bresenham line algorithm

No. Bresenham algorithm is only for thin lines 

The width of a line can be easily achieved by painting adjacent pixels using Besenham, WU, or other similar algos.

It's easy if you know line orientation  8)

@FORTRANS && daydreamer :
  It's an expensive solution... but if algorithm don't work   

What's wrong with Gdi+ thick lines?

Perhaps GDI+ or other graphics libraries with antialiasing are better, but now I'm trying to draw fast (and simple if posible).

Thanks for the ideas. Now I have a mix. Thin lines are Bresenham drawings. Over that is a normal thick GDI line, witch in theory it's Murphy's algorithm. The idea is to draw that line and to make nicer points in same process. 

[HSE]

Using Fortrans and Daydreammer "big pixel" line.

Final result not so impressive  :(

Perhaps an antialiased line it's mandatory...

[felipe]

Nice project and looks difficult too. Congratulations.  :t

[HSE]

Nice project and looks difficult too.

Yes, nothing easy, and no time for that!

Using GDI+. With the antialiased thick line is far far better I think.

[daydreamer]

wonder how it looks with dx9 line or poly used as line with fullfledged hardware antialias filter?

[HSE]

wonder how it looks with dx9 line or poly used as line with fullfledged hardware antialias filter?

Fanatics of DirectX assume that everybody know something that I don't know.

I found examples to draw a detailed tiger, planets in movement... but none to draw only a line 

But I was thinking in Biterider solution, I have to see.

[Siekmanski]

What about stretching a circle to a line?

[HSE]

Apparently Direct2D is better suited for lines, but again examples are very complex