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Painting program - Line drawing Example.bb
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Painting program - Line drawing Example.bb
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Global win = CreateWindow("Painting program - Line drawing Example",100,100,800,600,0,1)
Global can = CreateCanvas(0,20,800,600,win)
Dim cols(10,3);the colors
Global mw = 48;wapwidth
Global mh = 48;height
Global tw = 640/mw;tilewidth
Global th = 480/mh;height
Dim map(mw,mh);create map
Global canim = CreateImage(800,600);the image (speedup)
Global brushindex=5;brushcolor
Global brushsize=4
Global cmx;mouse x pos
Global cmy; mouse y pos
Global tileim = CreateImage(tw,th,11)
Global tileimbig = CreateImage(32,32,11)
; create the colors and images
refreshtileimages(True)
; our area of operation
Global screen$="canvas"
Global explode = False
Global linemode = False
Global linedrawn = False
Global lsx1
Global lsy1
Global lsx2
Global lsy2
updateinterface
.main
Repeat
we = WaitEvent()
If we=$102;keyup
If screen = "canvas"
If EventData()=38;l
If linemode = True Then linemode = False Else linemode = True
If linemode = True Then linedrawn=True
updateinterface
End If
If EventData()>=2 And EventData()<=10
brushsize = EventData()-1
updateinterface
End If
If EventData()=18;e
If explode = True Then explode = False Else explode = True
End If
End If
End If
If we=$201;mosuedown
If screen = "canvas"
If RectsOverlap(cmx,cmy,1,1,0,0,(mw+1)*tw,(mh+1)*th)
lsx1 = cmx
lsy1 = cmy
linedrawn=False
End If
End If
End If
If we=$202;mouseup
If EventSource() = can
If EventData() = 1
If RectsOverlap(cmx,cmy,1,1,0,0,(mw+1)*tw,(mh+1)*th)
If linemode = True
lsx2 = cmx
lsy2 = cmy
makeline
updateinterface
linedrawn=True
End If
Else
linedrawn=True
End If
If RectsOverlap(cmx,cmy,1,1,680,0,32,11*32)
brushindex=cmy/32
updateinterface
End If
If linemode=False
If RectsOverlap(cmx,cmy,1,1,0,0,(mw+1)*tw,(mh+1)*th)
brushdown(cmx,cmy,brushindex)
updateinterface
End If
End If
End If
If EventData() = 2
If RectsOverlap(cmx,cmy,1,1,680,0,32,11*32)
If RequestColor()=True
brushindex=cmy/32
cols(brushindex,0) = RequestedRed()
cols(brushindex,1) = RequestedGreen()
cols(brushindex,2) = RequestedBlue()
refreshtileimages
updateinterface
End If
End If
If RectsOverlap(cmx,cmy,1,1,0,0,(mw+1)*tw,(mh+1)*th)
brushdown(cmx,cmy,0)
updateinterface
End If
End If
End If
End If
If we=$203;mousemove
If EventSource()=can
cmx = EventX()
cmy = EventY()
If MouseDown(1) = True
If linemode=False
If RectsOverlap(cmx,cmy,1,1,0,0,(mw+1)*tw,(mh+1)*th)
brushdown(cmx,cmy,brushindex)
updateinterface
End If
End If
End If
If MouseDown(2) = True
If RectsOverlap(cmx,cmy,1,1,0,0,(mw+1)*tw,(mh+1)*th)
brushdown(cmx,cmy,0)
updateinterface
End If
End If
updateinterface
End If
End If
If we=$401;gadgetaction
End If
If we=$4001
End If
If we=$803 Then Exit
Forever
End
.funcs
Function updateinterface()
SetBuffer ImageBuffer(canim)
Cls
Color 255,255,255
For y=0 To mh-1
For x=0 To mw-1
DrawImage tileim,x*tw,y*th,map(x,y)
Next
Next
For y=0 To 10
DrawImage tileimbig,680,y*32,y
If brushindex = y
Rect 681,y*32,31,31,False
End If
Next
For y=0 To 47
For x=0 To 47
a = map(x,y)
Color cols(a,0),cols(a,1),cols(a,2)
Rect x*2+660,y*2+370,2,2
Next
Next
; draw the brush view
Color 255,255,255
Rect cmx-brushsize*tw/2,cmy-brushsize*th/2,brushsize*tw,brushsize*th,False
; draw the line
If linemode = True And linedrawn = False
Color 255,255,0
Line lsx1,lsy1,cmx,cmy
End If
If explode = True
Text 10,480,"Explode brush is On (key e)"
Else
Text 10,480,"Explode brush is Off (key e)"
End If
If linemode = True
Text 10,500,"Line mode is on (l)"
Else
Text 10,500,"Line mode is off (l)"
End If
SetBuffer CanvasBuffer(can)
Cls
DrawImage canim,0,0
FlipCanvas can
End Function
Function refreshtileimages(init=False)
For i = 0 To 10
SetBuffer ImageBuffer(tileim,i)
If init=True
Color 200+i*3,10+i*20,10
cols(i,0) = ColorRed()
cols(i,1) = ColorGreen()
cols(i,2) = ColorBlue()
End If
Color cols(i,0),cols(i,1),cols(i,2)
Rect 0,0,tw,th,True
SetBuffer ImageBuffer(tileimbig,i)
Color cols(i,0),cols(i,1),cols(i,2)
Rect 0,0,32,32
For x=-1 To 1
For y=-1 To 1
Color 4,4,4
Text tw/2+x,th/2+y,i,1,1
Next
Next
Color 255,255,255
Text tw/2,th/2,i,1,1
Next
End Function
.brushfuncs
Function makeline()
Local x1=lsx1/tw
Local y1=lsy1/th
Local x2=lsx2/tw
Local y2=lsy2/th
Local dx
Local dy
Local sx
Local sy
Local e
dx = Abs(x2 - x1)
sx = -1
If x1 < x2 Then sx = 1
dy = Abs(y2 - y1)
sy = -1
If y1 < y2 Then sy = 1
If dx < dy Then
e = dx / 2
Else
e = dy / 2
End If
Local exitloop=False
While exitloop = False
; map(x1,y1) = brushindex
brushdown(x1*tw,y1*th,brushindex)
If x1 = x2
If y1 = y2
exitloop = True
End If
End If
If dx > dy Then
x1 = x1 + sx : e = e - dy
If e < 0 Then e = e + dx : y1 = y1 + sy
Else
y1 = y1 + sy : e = e - dx
If e < 0 Then e = e + dy : x1 = x1 + sx
EndIf
Wend
End Function
Function brushdown(cmx,cmy,ind)
If brushsize=1 Then map(cmx/tw,cmy/th) = ind
If brushsize>1 Then
If explode = True
For y=-brushsize/2 To brushsize/2
For x=-brushsize/2 To brushsize/2
If cmx/tw+x >=0 And cmx/tw+x <=mw
If cmy/th+y >=0 And cmy/th+y <=mh
If Rnd(brushsize)<2
b = Rnd(cmx/tw-brushsize/2,cmx/tw+brushsize/2)
c = Rnd(cmy/th-brushsize/2,cmy/th+brushsize/2)
If b>=0 And b<=mw And c>=0 And c<=mh
a = map(b,c)
map(cmx/tw+x,cmy/th+y) = a
End If
End If
End If
End If
Next
Next
End If
If explode = False
For y=-brushsize/2 To brushsize/2
For x=-brushsize/2 To brushsize/2
If cmx/tw+x >=0 And cmx/tw+x <=mw
If cmy/th+y >=0 And cmy/th+y <=mh
map(cmx/tw+x,cmy/th+y) = ind
End If
End If
Next
Next
End If
End If
End Function