From SCAR Divi Manual
function GroupTPA(const TPA: TPointArray; const Dist: Integer): T2DPointArray;
SCAR Divi 3.28 > Current
- Contained a bug in 3.26-3.27 that caused the initial element in every subarray of the result to be duplicated inside of that subarray.
- In 3.26-3.27 the algorithm was implemented incorrectly and split every point of TPA up into a subarray and then included every other point within a distance of the first point in that subarray.
- TPAGroup (SCAR Divi 3.26 > 3.34)
- TPAToATPA (SCAR Divi 3.26 > 3.34)
This function splits a given TPointArray TPA into separate TPointArrays, by grouping points that are within the given distance Dist of the first point of each subarray. If a point isn't within the given distance of any first point of the subarrays, a new subarray is created containing that point as first one. The function returns a T2DPointArray containing all the resulting TPointArrays. An extended function with additional functionality is available as GroupTPAEx.
var TPA: TPointArray; ATPA: T2DPointArray; i: Integer; begin ClearDebug; TPA := [Point(2, 5), Point(6, 9), Point(0, 0), Point(5, 5), Point(1, 1), Point(5, 7), Point(-2, 0)]; ATPA := GroupTPA(TPA, 2); for i := 0 to High(ATPA) do WriteLn(TPAToStr(ATPA[i])); end.
(2,5) (6,9) (0,0);(1,1);(-2,0) (5,5);(5,7)