Total newb working on a map building engine

Thanks, "puki" ... whaddya watchin'?

Well, here comes Number

8) "TileImage" isn't what you want, IsaacJS2. It's "DrawImage".

This should do nicely:

;Draw map image and test world creation algorithm for tweaking

Global x=0
Global y=0

Global Grassmap
Global Oceanmap
Global Forestmap
Global Desertmap
Global Icemap

SeedRnd MilliSecs()

Global game = True

While game
	StartWorld ; initialize
	game = PlayGame() ; show the tiles
Wend

End

; ****************************


Function StartWorld()

	Graphics 800,600 ;Set video mode

	x=0 ;Reset coordinates to 0
	y=0

	SetBuffer BackBuffer() ;Draw these images to the backbuffer

	Grassmap=LoadImage("Grass 1.png") ;Load Images...
	Oceanmap=LoadImage("Ocean 2.png")
	Forestmap=LoadImage("Forest 1.png")
	Desertmap=LoadImage("Desert Sand 1.png")
	Icemap=LoadImage("Ice 1b.png")
	
End Function

Function PlayGame%()
	
	While y < 576
			
		Select Rand(0,4)
	
			Case 0 ;If Grass chosen, set DrawMapImage accordingly
			DrawMapImage=Grassmap ;and go to function to draw this image to

			;Repeat as needed...
			Case 1
			DrawMapImage=Oceanmap
			
			Case 2
			DrawMapImage=Forestmap
			
			Case 3
			DrawMapImage=Desertmap
			
			Case 4
			DrawMapImage=Icemap
			
		End Select

		DrawImage DrawMapImage,x,y
	
		x=x+64
		If x >= 768 Then
			y=y+64
			x=0
		EndIf
		
	Wend

	Text 20, 20, "Hit Enter for new terrain. Any other key returns to desktop."

	VWait
	Flip ; Put backbuffer image onto front screen and show image
	key = WaitKey()

	If KeyHit(28)
		Cls
		FreeImage Grassmap ;Free the following images from memory...
		FreeImage Oceanmap ;Repeat as needed...
		FreeImage Forestmap
		FreeImage Desertmap
		FreeImage Icemap
		Return True ; start over again. this is ugly code und should be changed
	Else
		Return False
	EndIf			

End Function