' -------------------------------------
' Interstellar Overdrive
' 3D Starfield example
' Use Up/Down to accelerate/decelerate
' Tesuji 2008
' -------------------------------------
SuperStrict
'Graphics(1280,800,32,0)
Graphics(800,600,32,0)
Const MAX_STARS:Int = 2048
Local starImage:TImage = drawStarImage()
Local stars:Star[MAX_STARS]
For Local i:Int = 0 To MAX_STARS-1
stars[i] = Star.Create(starImage)
Next
Local speed:Float = .5
While Not KeyHit(KEY_ESCAPE)
' motion blur cls
SetOrigin 0,0
SetAlpha .35
SetBlend ALPHABLEND
SetScale 1.0,1.0
SetColor 0,0,0
DrawRect 0,0,GraphicsWidth(),GraphicsHeight()
For Local s:Star = EachIn stars
s.update(speed)
s.render()
Next
If KeyDown(KEY_UP) speed :* 1.01
If KeyDown(KEY_DOWN) speed :* .99
Flip
Wend
End
' -----------------------------------------------------------------------------
Type Star
Field x:Float,y:Float
Field xPos:Float,yPos:Float,zPos:Float
Field zVel:Float
Field intensity:Float
Field size:Float
Field image:TImage
Function Create:Star(starImage:TImage)
Local s:Star = New Star
s.init()
s.image = starImage
Return s
End Function
Method init()
xPos = Rnd(-1,1)
yPos = Rnd(-1,1)
zPos = Rnd(900,1000)
zVel = Rnd(0.5,5)
size = Rnd(0.1,.5)
If Rand(0,100) = 0 Then size = size * 4
End Method
Method update(speed:Float=1.0)
zPos :- Abs(zVel*speed)
x = (xPos/zPos) * 256
y = (yPos/zPos) * 256
intensity = 1-(zPos*.001)
If x < -1 Or x > 1 Or y < -1 Or y > 1 Or zPos < 1 Or zPos > 1000
init()
End If
End Method
Method render()
SetOrigin GraphicsWidth()/2, GraphicsHeight()/2
SetImageHandle image,ImageWidth(image)/2,ImageHeight(image)/2
SetScale size*intensity*.5, size*intensity*.5
SetBlend LIGHTBLEND
SetRotation 0
SetAlpha intensity
SetColor 255,255*intensity,255*intensity
DrawImage image, x*(GraphicsWidth()/2), y*(GraphicsHeight()/2)
End Method
End Type
' -----------------------------------------------------------------------------
Function drawStarImage:TImage()
Local starImage:TImage = CreateImage(64,64)
Cls
SetBlend LIGHTBLEND
SetAlpha .05
For Local i:Int = 1 To 32
SetColor (32-i)*8,(32-i)*8,255
DrawOval (32-i),(32-i), i*2,i*2
Next
SetLineWidth 3.0
SetColor 128,128,255
SetAlpha .125
DrawLine 32,0,32,64
DrawLine 8,32,56,32
SetLineWidth 1.0
DrawLine 32,4,32,60
DrawLine 12,32,52,32
DrawLine 4,4,60,60
DrawLine 60,4,4,60
GrabImage starImage,0,0
Return starImage
End Function |
