| |
| |
|
 | Bresenham-Algorithmus [...]  line characters
Frabbing, URL=www.paules-pc-forum.de/forum/dlls-includes-units-prozeduren/118552-bresenham-algorhythmus.html, Zeitpunkt=23.08.2009
lines yourself to charge, Pixel for Pixel. CompileMarkSeparationBresenham-Algorhythmus in XProfan
(c) Frank Abbing für http://www.paules-pc-forum.de/forum/xprofan/
Declare grid&
SYNTAX:
Bresenham(Farbe (RGB), Startpunkt links (in Pixel), Startpunkt oben, Endpunkt rechts, Endpunkt unten)
________________________________________________________________________________________________________________
Proc Bresenham
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Parameters col&,x1&,y1&,x2&,y2&
Declare x&,y&,z&,a&,b&,d&,dx&,dy&,dp&,dq&
dx&=@abs(x2&-x1&)
dy&=@abs(y2&-y1&)
If ((dx&<>0) AND (dy&<>0))
If ((dy&<dx&) OR (dy&=dx&))
x&=x1&
y&=y1&
z&=x2&
If (x1&<x2&) OR (x1&=x2&)
a&=1
Else
a&=-1
EndIf
If (y1&<y2&) OR (y1&=y2&)
b&=1
Else
b&=-1
EndIf
dp&=dy&+dy&
d&=dp&-dx&
dq&=dp&-(dx&+dx&)
SetPixel x&,y&,col&
AddString(grid&,Str$(x&)+"|"+Str$(y&))
While (x&<>z&)
x&=x&+a&
If d&<0
d&=d&+dp&
Else
y&=y&+b&
d&=d&+dq&
EndIf
SetPixel x&,y&,col&
AddString(grid&,Str$(x&)+"|"+Str$(y&))
EndWhile
Else
y&=y1&
x&=x1&
z&=y2&
If (y1&<y2&) OR (y1&=y2&)
a&=1
Else
a&=-1
EndIf
If (x1&<x2&) OR (x1&=x2&)
b&=1
Else
b&=-1
EndIf
dp&=dx&+dx&
d&=dp&-dy&
dq&=dp&-(dy&+dy&)
SetPixel x&,y&,col&
AddString(grid&,Str$(x&)+"|"+Str$(y&))
While y&<>z&
y&=y&+a&
If d&<0
d&=d&+dp&
Else
x&=x&+b&
d&=d&+dq&
EndIf
SetPixel x&,y&,col&
AddString(grid&,Str$(x&)+"|"+Str$(y&))
EndWhile
EndIf
EndIf
If ((dx&=0) OR (dy&=0))
If ((dx&=0) AND (dy&<>0)) achsenparallel x
x&=x1&
y&=y1&
z&=y2&
If (y1&<y2&) OR (y1&=y2&)
b&=1
Else
b&=-1
EndIf
SetPixel x&,y&,col&
AddString(grid&,Str$(x&)+"|"+Str$(y&))
While y&<>z&
y&=y&+b&
SetPixel x&,y&,col&
AddString(grid&,Str$(x&)+"|"+Str$(y&))
EndWhile
Else
If ((dx&<>0) AND (dy&=0)) achsenparallel y
x&=x1&
y&=y1&
z&=x2&
If (x1&<x2&) OR (x1&=x2&)
a&=1
Else
a&=-1
EndIf
SetPixel x&,y&,col&
AddString(grid&,Str$(x&)+"|"+Str$(y&))
While x&<>z&
x&=x&+a&
SetPixel x&,y&,col&
AddString(grid&,Str$(x&)+"|"+Str$(y&))
EndWhile
EndIf
EndIf
EndIf
x1&=x&
y1&=y&
Endproc
Cls
Randomize
grid&=Create("GridBox", %hwnd, "X-Achse;1;56;Y-Achse;1;56", 2, 8, 8, 136, 408)
Whileloop 20
Bresenham(RGB(Rnd(255),Rnd(255),Rnd(255)), Rnd(490)+150,Rnd(400), Rnd(490)+150,Rnd(400))
EndWhile
While 1
WaitInput
Case %key=2:ef='./../../references-fonction/XProfan/break/'>Break
Endwhile
End
who not self LinienPunkte to charge would like, but nevertheless Pixel for Pixel self draw would like, can itself the LineDDA-Api [...] valet.
CompileMarkSeparationdef lineDDA(6) !"gdi32.dll","LineDDA"
cls
lineDDA(10,10,200,150,procAddr(myLineDDAProc,3),rgb(255,0,0))
waitInput
end
proc myLineDDAProc
parameters x&,y&,c&
setpixel x&,y&,c&
return 1
endProc
|
|
| |
| |
| |
|
(521)
Deutsch
English
Français
Español
Italia