ПроЭктировщик
Регистрация: 17.07.2009
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Написано 51 полезных сообщений (для 71 пользователей)
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Ответ: Voxel (octotree)
Я тут подумал , если точки в вокселе нет ,то он удаляется ,но в динамике точки перемещаются , а потому могут сново попасть в удалённый узел ,значит нужно удалять только те воксели при премещении точек оказались пусты . Так что я ввёл дополнительный параметр ,как жизнь вокселя . Думаю понятней будет в коде ( добавленые/изменённые строки ,помечены так ;///
time = CreateTimer(120)
SeedRnd(MilliSecs())
Const Points = 200
Global id,id2,mx,my ,CubDepth ,CubSize
Global px,py,pz ,s ,mxx,myy , mmy
Global timeoutcreate# , timeintcreate
Global viewline ,v=3
Type OCTREE
Field Child.OCTREE[7] ;8 потомков
Field xmin,ymin,zmin
Field emply , timeLive, isView ;///
;Field qred,qgreen,qblue,qalpha,qcolor
Field size , depth
End Type
Type Point
Field x,y,z
Field x2,y2,z2
Field vx,vy,vz
End Type
Global root.OCTREE , one.OCTREE
Function RootOctree.OCTREE(xmin,ymin,zmin ,size,depth)
newsize = size / 2
this.OCTREE = New OCTREE
this\xmin = xmin
this\ymin = ymin
this\zmin = zmin
this\size = size
this\depth = depth
this\emply =0
id2=id2+1
Return this
End Function
Function AddOctree.OCTREE( this.OCTREE,xmin,ymin,zmin ,size,depth )
If InCube(xmin,ymin,zmin,size) = True
newsize = size / 2
If this = Null
this.OCTREE = New OCTREE
this\xmin = xmin
this\ymin = ymin
this\zmin = zmin
this\size = size
this\depth = depth
id2=id2+1
this\emply = 1
Else
this\emply = 1
this\timelive = 0 ;///
If depth >0
newdepth = depth -1
newxmin = xmin+newsize
newymin = ymin+newsize
newzmin = zmin+newsize
this\Child[0] = AddOctree(this\Child[0], xmin,ymin,zmin ,newsize ,newdepth )
this\Child[1] = AddOctree(this\Child[1], xmin,newymin ,zmin ,newsize ,newdepth )
this\Child[2] = AddOctree(this\Child[2], newxmin ,newymin ,zmin ,newsize ,newdepth )
this\Child[3] = AddOctree(this\Child[3], newxmin ,ymin,zmin ,newsize ,newdepth )
this\Child[4] = AddOctree(this\Child[4], xmin,ymin,newzmin ,newsize,newdepth )
this\Child[5] = AddOctree(this\Child[5], xmin,newymin ,newzmin ,newsize ,newdepth )
this\Child[6] = AddOctree(this\Child[6], newxmin ,newymin ,newzmin ,newsize ,newdepth )
this\Child[7] = AddOctree(this\Child[7], newxmin ,ymin,newzmin ,newsize ,newdepth )
EndIf
EndIf
Else
If this<>Null
this\emply = 0
this\timelive = 1 ;///
If depth >0
newdepth = depth -1
newxmin = xmin+newsize
newymin = ymin+newsize
newzmin = zmin+newsize
this\Child[0] = AddOctree(this\Child[0], xmin,ymin,zmin ,newsize ,newdepth )
this\Child[1] = AddOctree(this\Child[1], xmin,newymin ,zmin ,newsize ,newdepth )
this\Child[2] = AddOctree(this\Child[2], newxmin ,newymin ,zmin ,newsize ,newdepth )
this\Child[3] = AddOctree(this\Child[3], newxmin ,ymin,zmin ,newsize ,newdepth )
this\Child[4] = AddOctree(this\Child[4], xmin,ymin,newzmin ,newsize ,newdepth )
this\Child[5] = AddOctree(this\Child[5], xmin,newymin ,newzmin ,newsize ,newdepth )
this\Child[6] = AddOctree(this\Child[6], newxmin ,newymin ,newzmin ,newsize ,newdepth )
this\Child[7] = AddOctree(this\Child[7], newxmin ,ymin,newzmin ,newsize ,newdepth )
EndIf
EndIf
EndIf
Return this
End Function
Function InCube(Axmin,Aymin,Azmin,Asize)
For pts.POINT = Each POINT
If PointInCube(Axmin,Aymin,Azmin,Axmin+Asize,Aymin+Asize,Azmin+Asize,pts\x,pts\y,pts\z ) = True Then
Return True
Exit
EndIf
Next
Return False
End Function
Graphics 800,600,32,2
SetBuffer BackBuffer()
For p = 0 To Points
pt.POINT = New POINT
pt\x = Int(Rnd(10,120))
pt\y = Int(Rnd(10,120))
pt\z = Int(Rnd(10,120))
id3 = id3 +1
Next
CubDepth =6 ; 8 ;число вложений (глубина )
CubSize = 128 ; размеры квадранта
root.OCTREE = RootOctree(0,0,0,CubSize ,CubDepth )
While Not KeyHit(1)
start = MilliSecs()
id=0
Cls
If KeyHit(28) Then viewline = Not viewline
WaitTimer(time)
timestart = MilliSecs()
AddOctree(root, 0,0,0,CubSize ,CubDepth)
For pt2.POINT = Each POINT
If pt2\x <-250 Then
v=3
EndIf
If pt2\x >= 226 Then
v=-3
EndIf
pt2\x = pt2\x +v
Next
For roots.OCTREE = Each OCTREE
If roots<>Null
id=id+1
If roots\timelive = 1 Then roots\timelive = roots\timelive +1 ;///
If roots\emply = 0 And roots\timelive = 2 And roots <> First OCTREE ;///
Delete roots
id2=id2-1
EndIf
EndIf
Next
RenderOctree(root,CubDepth )
timeout = (MilliSecs()-timestart)
;--------------- INFO -----------------------------------
Color 255,255,255
Text 550,20,"Elements = "+id+" id2 = "+id2
Text 550,80,"Time AddOctree = "+timeout
timeoutvis = (MilliSecs()-timeinvis)
Text 550,100,"Current FPS: " + CurFPS#
Text 550,120,"ViewBoxes = "+viewline +" - press ENTER"
CurFPS# = 1000.0 / (MilliSecs() - Start)
Flip
Wend
Delete Each OCTREE
Delete Each POINT
FreeTimer time
End
Function RenderOctree(this.OCTREE,depth)
If this.OCTREE <> Null
If (depth >0) And this\emply = 1
If viewline = 0
If this\emply = 0 Then Color 255,0,255
If this= First OCTREE Then Color 0,0,255 Else Color 200,200,200
x_min1 = 400+ (this\xmin - this\ymin)
x_min2 = 400+ ((this\xmin+this\size) - this\ymin)
x_min3 = 400+ ((this\xmin+this\size) - (this\ymin+this\size))
x_min4 = 400+ ((this\xmin) - (this\ymin+this\size))
y_min1 = 300+ (this\xmin + this\ymin)/2 - this\zmin
y_min2 = 300+ ((this\xmin+this\size) + this\ymin)/2 - this\zmin
y_min3 = 300+ ((this\xmin+this\size) + (this\ymin+this\size))/2 - this\zmin
y_min4 = 300+ ((this\xmin) + (this\ymin+this\size))/2 - this\zmin
Line x_min1 , y_min1 , x_min2 , y_min2
Line x_min2 , y_min2 , x_min3 , y_min3
Line x_min3 , y_min3 , x_min4 , y_min4
Line x_min4 , y_min4 , x_min1 , y_min1
Line x_min1 , y_min1 -this\size , x_min2 , y_min2 -this\size
Line x_min2 , y_min2 -this\size , x_min3 , y_min3 -this\size
Line x_min3 , y_min3 -this\size , x_min4 , y_min4 -this\size
Line x_min4 , y_min4 -this\size , x_min1 , y_min1 -this\size
Line x_min1 , y_min1 , x_min1 , y_min1 -this\size
Line x_min2 , y_min2 , x_min2 , y_min2 -this\size
Line x_min3 , y_min3 , x_min3 , y_min3 -this\size
Line x_min4 , y_min4 , x_min4 , y_min4 -this\size
EndIf
depth = depth - 1
RenderOctree(this\Child[0],depth)
RenderOctree(this\Child[1],depth)
RenderOctree(this\Child[2],depth)
RenderOctree(this\Child[3],depth)
RenderOctree(this\Child[4],depth)
RenderOctree(this\Child[5],depth)
RenderOctree(this\Child[6],depth)
RenderOctree(this\Child[7],depth)
Else
If viewline = 1
zz = this\zmin
If zz > 200 Then zz = 200
If zz < 0 Then zz = 0
Color 25+zz ,25+zz ,25+zz
LockBuffer GraphicsBuffer()
WritePixel 400+ ( this\xmin -this\ymin) , 300+ ( this\xmin +this\ymin)/2 - this\zmin,$ffffff, GraphicsBuffer()
UnlockBuffer GraphicsBuffer()
EndIf
LockBuffer GraphicsBuffer()
WritePixel this\xmin , this\ymin , $ffffff
UnlockBuffer GraphicsBuffer()
EndIf
EndIf
End Function
Function PointInCube(pointXmin#,pointYmin#,pointZmin#,pointXmax#,pointYmax#,pointZmax#,pointX#,pointY#,pointZ )
If pointX >=pointXmin And pointX < pointXmax
If pointY >= pointYmin And pointY < pointYmax
If pointZ>= pointZmin And pointZ< pointZmax
Return True
End If
End If
End If
Return False
End Function
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