; PROJECT : spaceinvaders
; AUTHOR  : david wheeler
; CREATED : 27/01/2011
; EDITED  : 27/02/2011
; ---------------------------------------------------------------------
OpenScreen 640,480,32,2
SetFPS 60
ScreenVsync On
Mouse Off
Global quit=False
Global invaderimage1=1
Global invaderimage2=4
Global shipimage=60
Global numofinvaders=0
Global shipsprite=60
Global movem
Global anim
Global dropem
Global tit
global v
Global changedir = 1 ; *** edit here and give a start direction; could be 1 or -1
	Type tinvader
	image
	oldimage
	Status
	speed
	Xpos,Ypos
	animadd
	count
EndType
Type tship
	image
	xpos
	ypos
	speed
	status
EndType
 
Dim invaders(100) As tinvader
Dim ship(1) As tship
creategfx()
setupwave()
s$="Number of Invaders = "
s$=s$+Str$(numofinvaders)
ship(1).speed=2
Repeat
	Cls 0
	v=ScanCode()
	Print s$
	Print shipimage
	tick=tick+1
	If tick>40
		tick=0
		tit=1
		movem=1
   EndIf
	control_Invaders()
	control_player()
	movem=0
	drop=0
	DrawAllSprites
	Sync
Until quit=True
 
function control_invaders()
		;*** this is to check wether to change dir and drop or not
	For n=1 To numofinvaders
		If invaders(n).xpos+invaders(n).speed > 608 
			drop = 1
			changedir = -1
			ExitFor
		ElseIf invaders(n).xpos+invaders(n).speed < 0
			drop = 1
			changedir = 1
			ExitFor
		Else
			drop = 0	
		EndIf
	Next
	;*** end edit part
	For n=1 To numofinvaders
		If movem=1
 
			invaders(n).xpos=invaders(n).xpos+(invaders(n).speed*changedir) ; <-- here: calculate xpos with the changdir
 
			;*** if drop = 1 the we calculate the new ypos
			If drop = 1
				invaders(n).ypos = invaders(n).ypos+16
			EndIf
			;*** end edit part
			tit=1
		EndIf
		If tit=1 And invaders(n).count=0
			Inc invaders(n).count
			invaders(n).image=invaders(n).animadd
			SpriteImage n,invaders(inv).image
 
		EndIf		
 		If tit=1 And invaders(n).count>30
 			invaders(n).count=0
 			tit=0
			invaders(n).image=invaders(n).image-invaders(n).animadd
			SpriteImage n,invaders(inv).image
		EndIf		
		If movem=0
			invaders(n).image=1
		EndIf
 
		PositionSprite n,invaders(n).xpos,invaders(n).ypos
		;DrawSprite n
Next
endfunction	
 
Function control_player()
 
  	Print v
  	If v=203
  		ship(1).xpos=ship(1).xpos-ship(1).speed
  	EndIf
  	 	If v=205
  		ship(1).xpos=ship(1).xpos+ship(1).speed
  	EndIf
  	PositionSprite shipsprite,ship(1).xpos,ship(1).ypos
	If v=16
  		quit=True
   EndIf	
 
EndFunction
 
Function creategfx()
 
	Restore gfx
	Invaderimage1=MakeImageFromData(13,10,32,20)
	Invaderimage2=MakeImageFromData(13,10,32,20)
   ;********************** Create Players Ship Sprite *************
 
	ShipImage=MakeImageFromData(13,10,32,20)
 
 // This  resource really should created dynamically 
        CreateSprite shipsprite
        SpriteImage shipsprite,shipimage
 
        ship(1).image=shipimage
        ship(1).xpos=320
        ship(1).ypos=400
EndFunction
 
Function MakeImageFromData(DataWidth,DataHeight,PixelWidth,PixelHeight,ThisColour=$00ff00)
	oldsurface=GetSurface()
	ThisImage=NewImage(DataWidth,DataHeight)
	RenderToImage ThisIMage
	Ink ThisColour
	LockBuffer
		For y=0 To DataHeight-1
			For x=0 To DataWidth-1
				If ReadData()>0			
					Dot x,y
				EndIf
			Next x
		Next y 	
	UnLockBuffer
	RenderToImage oldsurface
	ScaleImage ThisImage,PixelWidth,PixelHeight,1
EndFunction ThisImage
 
Function setupwave()
offsety=30
inv=1
For y=1 To 10
	For x=1 To 13
		t=ReadData()
		If t>0
			invaders(inv).xpos=offsetx
			invaders(inv).ypos=offsety
			invaders(inv).image=t
			invaders(inv).animadd=invaders(inv).image+1
 
			invaders(inv).speed=8
			CreateSprite inv
			SpriteImage inv,invaders(inv).image
			Inc inv
			Inc numofinvaders
		EndIf	
		offsetx=offsetx+38
		If x>11
			offsety=offsety+15
			offsetx=0
		EndIf
	Next
Next
EndFunction
gfx1:
;invader1 top row Image A
Data 0,0,0,0,0,0,0,0,0,0,0,0,0
Data 0,0,1,0,0,0,0,0,1,0,0,0,0
Data 1,0,0,1,0,0,0,1,0,0,1,0,0
Data 1,0,1,1,1,1,1,1,1,0,1,0,0
Data 1,1,1,0,1,1,1,0,1,1,1,0,0
Data 1,1,1,1,1,1,1,1,1,1,1,0,0
Data 0,1,1,1,1,1,1,1,1,1,0,0,0
Data 0,0,1,0,0,0,0,0,1,0,0,0,0
Data 0,1,0,0,0,0,0,0,0,1,0,0,0
Data 0,0,0,0,0,0,0,0,0,0,0,0,0
;invader1 top row Image B
Data 0,0,0,0,0,0,0,0,0,0,0,0,0
Data 0,0,1,0,0,0,0,0,1,0,0,0,0
Data 0,0,0,1,0,0,0,1,0,0,0,0,0
Data 0,0,1,1,1,1,1,1,1,0,0,0,0
Data 0,1,1,0,1,1,1,0,1,1,0,0,0
Data 1,1,1,1,1,1,1,1,1,1,1,0,0
Data 1,1,1,1,1,1,1,1,1,1,1,0,0
Data 1,0,1,0,0,0,0,0,1,0,1,0,0
Data 1,0,0,1,1,0,1,1,0,0,1,0,0
Data 0,0,0,0,0,0,0,0,0,0,0,0,0
;players_shipgfx
Data 0,0,0,0,0,1,0,0,0,0,0,0,0
Data 0,0,0,0,1,1,1,0,0,0,0,0,0
Data 0,0,0,0,1,1,1,0,0,0,0,0,0
Data 0,1,1,1,1,1,1,1,1,1,0,0,0
Data 1,1,1,1,1,1,1,1,1,1,1,0,0
Data 1,1,1,1,1,1,1,1,1,1,1,0,0
Data 1,1,1,1,1,1,1,1,1,1,1,0,0
Data 0,0,0,0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0,0,0,0
 
 
 
wave:
Data 0,0,0,1,1,1,1,1,1,1,0,0,0
Data 0,0,1,1,1,1,1,1,1,1,1,0,0
Data 0,0,1,1,1,1,1,1,1,1,1,0,0
Data 0,1,1,1,1,1,1,1,1,1,1,1,0
Data 0,0,0,0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0,0,0,0
 
 
 
Function dump()
Data 0,0,0,0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0,0,0,0
 
endfunction