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' Particle Pinch
'
' Copyright 2005 Ian Cowburn
'
' $Id$
'
Strict
Import noddybox.vector
Import noddybox.bitmapfont
Const MASSSIZE:Int=6
Const MASSRAD:Int=3
Type GameGFX
Global font:TBitmapFont
Global guifont:TBitmapFont
Global star:TImage
Global mass:TImage
Global collector:TImage
Global point:TImage
Global particle:Timage
Global pointer:TImage
End Type
Type TMass
Field x:Float
Field y:Float
Field v:TVector
Field mass:Float
Field friend:Int
Field inverse:Int
Field img:TImage
Field swallow:Int
Method New()
v=TVector.Create()
x=Rnd(0,GraphicsWidth())
y=Rnd(0,GraphicsWidth())
mass=25
friend=True
inverse=False
swallow=0
End Method
Method Attract(o:TMass)
If o=Self
Return
EndIf
Local d:TVector=TVector.Create(o.x-x,o.y-y)
Local l:Float=d.Length()
If l>0.1
l:*l
d.Normalise()
d.Scale((1/l)*o.mass)
If o.inverse
d.Minus()
EndIf
v.Add(d)
If d.Length()>MASSSIZE
d.SetLength(MASSSIZE)
EndIf
EndIf
End Method
Method MoveAndDraw()
x:+v.x
y:+v.y
SetColor(255,255,255)
DrawImage(img,x,y,swallow)
swallow=0
End Method
End Type
Type TPoint
Global img:TImage
Field x:Float
Field y:Float
Field lx:Float
Field ly:Float
Field v:TVector
Field r:Int
Field g:Int
Field b:Int
Field dead:Int
Field lost:Int
Method New()
v=TVector.Create()
x=Rnd(0,GraphicsWidth())
y=Rnd(0,GraphicsWidth())
lx=x
ly=y
r=Rand(100,200)
g=Rand(100,200)
b=Rand(100,200)
dead=False
lost=False
End Method
Method Attract:Int(o:TMass)
If dead Or lost
Return
EndIf
Local d:TVector=TVector.Create(o.x-x,o.y-y)
Local l:Float=d.Length()
If l<MASSRAD
If o.friend
dead=True
Else
lost=True
EndIf
TParticleMachine.AddCaptured(Self)
o.swallow=1
Else
l:*l
d.Normalise()
d.Scale((1/l)*o.mass)
If o.inverse
d.Minus()
EndIf
v.Add(d)
If d.Length()>MASSSIZE
d.SetLength(MASSSIZE)
EndIf
EndIf
Return dead
End Method
Method MoveAndDraw()
If (Not dead) And (Not lost)
lx=x
ly=y
x:+v.x
y:+v.y
SetColor(r,g,b)
DrawImage(img,x,y,0)
If x<0 Or y<0 Or x>GraphicsWidth() Or y>GraphicsHeight()
lost=True
TParticleMachine.AddLost(Self)
EndIf
EndIf
End Method
End Type
Type TParticle
Global img:TImage
Field x:Float
Field y:Float
Field a:Float
Field r:Int
Field g:Int
Field b:Int
Field dx:Float
Field dy:Float
Field ai:Float
Function FromLostPoint:TParticle(p:TPoint, d:Int)
Local o:TParticle=New TParticle
o.x=p.lx'-p.v.x*d
o.y=p.ly'-p.v.y*d
o.dx=-p.v.x*d
o.dy=-p.v.y*d
o.r=p.r
o.g=p.g
o.b=p.b
o.a=1
o.ai=-0.05
Return o
End Function
Function FromCapturedPoint:TParticle(p:TPoint, d:Int)
Local o:TParticle=New TParticle
o.x=p.x
o.y=p.y
o.dx=Rnd(-1,1)
o.dy=Rnd(-1,1)
o.r=p.r
o.g=p.g
o.b=p.b
o.a=1
o.ai=-0.05
Return o
End Function
Method Update()
x:+dx
y:+dy
a:+ai
If a>0
SetAlpha(a)
SetColor(r,g,b)
DrawImage(img,x,y)
EndIf
End Method
End Type
Type TParticleMachine
Global list:TList
Function Init()
list=CreateList()
End Function
Function Clear()
list.Clear()
End Function
Function AddLost(p:TPoint)
For Local f:Int=0 To 5
list.AddLast(TParticle.FromLostPoint(p,f))
Next
End Function
Function AddCaptured(p:TPoint)
For Local f:Int=0 To 5
list.AddLast(TParticle.FromCapturedPoint(p,f))
Next
End Function
Function Process()
Local l:TLink=list.FirstLink()
Local t:TLink
While l<>Null
Local p:TParticle=TParticle(l.Value())
p.Update()
If p.a<0.01
t=l.NextLink()
l.Remove()
l=t
Else
l=l.NextLink()
EndIf
Wend
SetAlpha(1)
SetColor(255,255,255)
End Function
End Type
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