you can try
var
YourArray, Row: PFloat;
Width: Integer;
Height: Integer;
// alloc array
GetMem(YourArray, Width*Height*Sizeof(Float));
// access point (X, Y), while X in [0,Width-1] and Y in [Y, Height-1]
YourArray[X + Y*Width] := ...
// access row (Y)
Row := @YourArray[Y*Width];
Row[X] := ...
// free your array
FreeMem(YourArray);
Arjan van Dijk schrieb:
Hi!
In my code I often use 2D arrays.
Until today, I kept the maximum dimension fixed to 400 * 300 points.
How can I make allocatable columns of ARBITRARY size?
For simplicity here a 1D reduction of the problem:
This is what I have:
CONST
MaxN = 400;
TYPE
ColumnType = ARRAY[1..MaxN] OF Float;
Recently, some of my grids were so large that having all my grids use
the same maximum size
would cost too much memory. Therefore, I would like to dynamically
allocate space
when the actual dimensions of a grid are known. I found:
TYPE
ColumnTypePtr = ^ColumnType;
VAR
Column : ColumnTypePtr;
...
NEW(Column);
and now I have a column of size 400.
--> Question: How can I make allocatable columns of ARBITRARY size?
Thanks,
Arjan
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