Creating Scrolling Terrain - Page 6

Frame "Draw_next"

Now let's look at the frame "draw_next" (as mentioned a few lines of code above...)

There will never be more than 1000 terrain items at one time. I therefore start the terrain depth IDs at 2000 and keep it between 2000 and 3000. You should keep track of what objects (user laser shots, gun laser shots, terrain pieces) are in which range of "depths".

We increase "row" -- which we will use to cunsult the list of terrain data variables. Since in Flash undeclared variables are considered to have a value of "0" the first time this next line ever runs, it increases "row" to a value of 1.

Set Variable: "row" = row+1
Set Variable: "column" = 1
Comment: ----------------------------------------------
Comment:        row <%gt%> maxterrain?
Comment: ----------------------------------------------
Comment: MORE than 1 level?..........
Comment: here is where you would, rather than reset the row counter... you would (a) reset the row counter and (b) switch the variable name from "t" to "t2" or something like that -- and create a whole new terrain variable set all starting with "t2".
If (row<%gt%>/:last_terrain)
    Set Variable: "row" = 1
End If