Bitmap/Bresenham's line algorithm: Difference between revisions
Bitmap/Bresenham's line algorithm (view source)
Revision as of 20:02, 3 November 2013
, 10 years agomoved PL/I
m (→{{header|Coffeescript}}: Changed 'while true' to more idiomatic 'loop'.) |
Walterpachl (talk | contribs) m (moved PL/I) |
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Line 1,518:
}
}</lang>
=={{header|PicoLisp}}==▼
<lang PicoLisp>(de brez (Img X Y DX DY)▼
(let SX▼
(cond▼
((=0 DX) 0)▼
((gt0 DX) 1)▼
(T (setq DX (- DX)) -1) )▼
(let SY▼
(cond▼
((=0 DY) 0)▼
((gt0 DY) 1)▼
(T (setq DY (- DY)) -1) )▼
(if (>= DX DY)▼
(let E (- (* 2 DY) DX)▼
(do DX▼
(set (nth Img Y X) 1)▼
(when (ge0 E)▼
(inc 'Y SY)▼
(dec 'E (* 2 DX)) )▼
(inc 'X SX)▼
(inc 'E (* 2 DY)) ) )▼
(let E (- (* 2 DX) DY)▼
(do DY▼
(set (nth Img Y X) 1)▼
(when (ge0 E)▼
(inc 'X SX)▼
(dec 'E (* 2 DY)) )▼
(inc 'Y SY)▼
(inc 'E (* 2 DX)) ) ) ) ) ) )▼
(let Img (make (do 90 (link (need 120 0)))) # Create image 120 x 90▼
(brez Img 10 10 100 30) # Draw five lines▼
(brez Img 10 10 100 50)▼
(brez Img 10 10 100 70)▼
(brez Img 10 10 60 70)▼
(brez Img 10 10 20 70)▼
(out "img.pbm" # Write to bitmap file▼
(prinl "P1")▼
(prinl 120 " " 90)▼
(mapc prinl Img) ) )</lang>▼
=={{header|PL/I}}==
Line 1,585 ⟶ 1,626:
..........|..........
</lang>
▲=={{header|PicoLisp}}==
▲<lang PicoLisp>(de brez (Img X Y DX DY)
▲ (let SX
▲ (cond
▲ ((=0 DX) 0)
▲ ((gt0 DX) 1)
▲ (T (setq DX (- DX)) -1) )
▲ (let SY
▲ (cond
▲ ((=0 DY) 0)
▲ ((gt0 DY) 1)
▲ (T (setq DY (- DY)) -1) )
▲ (if (>= DX DY)
▲ (let E (- (* 2 DY) DX)
▲ (do DX
▲ (set (nth Img Y X) 1)
▲ (when (ge0 E)
▲ (inc 'Y SY)
▲ (dec 'E (* 2 DX)) )
▲ (inc 'X SX)
▲ (inc 'E (* 2 DY)) ) )
▲ (let E (- (* 2 DX) DY)
▲ (do DY
▲ (set (nth Img Y X) 1)
▲ (when (ge0 E)
▲ (inc 'X SX)
▲ (dec 'E (* 2 DY)) )
▲ (inc 'Y SY)
▲ (inc 'E (* 2 DX)) ) ) ) ) ) )
▲(let Img (make (do 90 (link (need 120 0)))) # Create image 120 x 90
▲ (brez Img 10 10 100 30) # Draw five lines
▲ (brez Img 10 10 100 50)
▲ (brez Img 10 10 100 70)
▲ (brez Img 10 10 60 70)
▲ (brez Img 10 10 20 70)
▲ (out "img.pbm" # Write to bitmap file
▲ (prinl "P1")
▲ (prinl 120 " " 90)
▲ (mapc prinl Img) ) )</lang>
=={{header|PureBasic}}==
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