BASIC GET TILEMAP Statement

GET TILEMAP

TYPE: plusBASIC graphics statement

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FORMAT: GET TILEMAP ( startcol , startrow ) - ( endcol , endrow ) , *arrayname

Action: Copies a rectangle section of cells from the tilemap to a numeric array.

• startcol and startrow specifies the upper-left corner of the rectangle.
• endcol and endrow specifies the lower-right corner of the rectangle.
• arrayname is the name of the array to copy the tilemap data into.
  • The array must already be DIMensioned to a size large enough to hold the data.
  • To calculate the size of an array needed to store the elements in a rectangle:
    • Multiply the width of the rectangle in columns by the height in lines.
    • Round up to an even number
    • Divide by two
• Illegal Quantity results from any of the following conditions:
  • startcol or endcol are not in the range 0 through 63.
  • startrow or endrow are not in the range 0 through 31.
  • endcol is less than startcol or endrow is less than startrow.

Examples:

10 DIM A(13)
20 GET TILEMAP (2,3)-(7,8),*A

Copies tilemap contents from column 2, line 3 to column 7, line 8 into array A().

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FORMAT: GET TILEMAP ( startcol , startrow ) - ( endcol , endrow ) , ^stringvar

Action: As above but copies the tilemap cells to string variable.

• stringvar is the name of the array to copy the tilemap data into.
  • The total number of cells in the rectangle must be less than 127.
• String too long error results if the rectangle contains more than 126 cells.

Examples:

10 DIM A(13)
20 GET TILEMAP (2,3)-(7,8),^A$(1)

Copies text tilemap contents from column 2, line 3 to column 7, line 8 into string variable A$(1).