intersection_llIntersectionLlIntersectionLlintersection_llintersection_ll🔗

Short description🔗

intersection_llIntersectionLlIntersectionLlintersection_llintersection_ll — Calculate the intersection point of two lines.

Warning🔗

intersection_llIntersectionLl is obsolete and is only provided for reasons of backward compatibility. New applications should use the operator intersection_linesIntersectionLines of the chapter Tools / Geometry instead.

Signature🔗

intersection_ll( point.y RowA1, point.x ColumnA1, point.y RowA2, point.x ColumnA2, point.y RowB1, point.x ColumnB1, point.y RowB2, point.x ColumnB2, out point.y Row, out point.x Column, out number IsParallel )

Description🔗

The operator intersection_llIntersectionLl calculates the intersection point of two lines. As input the two points on each line are expected (RowA1rowA1row_a1,ColumnA1columnA1column_a1, RowA2rowA2row_a2,ColumnA2columnA2column_a2) and (RowB1rowB1row_b1,ColumnB1columnB1column_b1, RowB2rowB2row_b2,ColumnB2columnB2column_b2). The parameters Rowrowrow and Columncolumncolumn return the result of the calculation. If the lines are parallel, the values of Rowrowrow and Columncolumncolumn are undefined and IsParallelisParallelis_parallel is 1. Otherwise, IsParallelisParallelis_parallel is 0.

Attention🔗

If the lines are parallel the values of Rowrowrow and Columncolumncolumn are undefined.

Execution information🔗

Execution information

Multithreading type: reentrant (runs in parallel with non-exclusive operators).
Multithreading scope: global (may be called from any thread).
Processed without parallelization.

Parameters🔗

RowA1rowA1row_a1 (input_control) point.y(-array) → (real / integer)HTuple (double / Hlong)HTuple (double / int / long)MaybeSequence[Union[float, int]]Htuple (double / Hlong)

Row coordinate of the first point of the first line.

ColumnA1columnA1column_a1 (input_control) point.x(-array) → (real / integer)HTuple (double / Hlong)HTuple (double / int / long)MaybeSequence[Union[float, int]]Htuple (double / Hlong)

Column coordinate of the first point of the first line.

RowA2rowA2row_a2 (input_control) point.y(-array) → (real / integer)HTuple (double / Hlong)HTuple (double / int / long)MaybeSequence[Union[float, int]]Htuple (double / Hlong)

Row coordinate of the second point of the first line.

ColumnA2columnA2column_a2 (input_control) point.x(-array) → (real / integer)HTuple (double / Hlong)HTuple (double / int / long)MaybeSequence[Union[float, int]]Htuple (double / Hlong)

Column coordinate of the second point of the first line.

RowB1rowB1row_b1 (input_control) point.y(-array) → (real / integer)HTuple (double / Hlong)HTuple (double / int / long)MaybeSequence[Union[float, int]]Htuple (double / Hlong)

Row coordinate of the first point of the second line.

ColumnB1columnB1column_b1 (input_control) point.x(-array) → (real / integer)HTuple (double / Hlong)HTuple (double / int / long)MaybeSequence[Union[float, int]]Htuple (double / Hlong)

Column coordinate of the first point of the second line.

RowB2rowB2row_b2 (input_control) point.y(-array) → (real / integer)HTuple (double / Hlong)HTuple (double / int / long)MaybeSequence[Union[float, int]]Htuple (double / Hlong)

Row coordinate of the second point of the second line.

ColumnB2columnB2column_b2 (input_control) point.x(-array) → (real / integer)HTuple (double / Hlong)HTuple (double / int / long)MaybeSequence[Union[float, int]]Htuple (double / Hlong)

Column coordinate of the second point of the second line.

Rowrowrow (output_control) point.y(-array) → (real)HTuple (double)HTuple (double)Sequence[float]Htuple (double)

Row coordinate of the intersection point.

Columncolumncolumn (output_control) point.x(-array) → (real)HTuple (double)HTuple (double)Sequence[float]Htuple (double)

Column coordinate of the intersection point.

IsParallelisParallelis_parallel (output_control) number(-array) → (integer)HTuple (Hlong)HTuple (int / long)Sequence[int]Htuple (Hlong)

Are the two lines parallel?

Example🔗

(HDevelop)

dev_set_color ('black')
RowLine1 := 350
ColLine1 := 250
RowLine2 := 300
ColLine2 := 300
Rows := 300
Columns := 50
disp_line (WindowHandle, RowLine1, ColLine1, RowLine2, ColLine2)
n := 0
for Rows := 40 to 200 by 4
  dev_set_color ('red')
  disp_line (WindowHandle, Rows, Columns, Rows+n, Columns+n)
  intersection_ll (Rows, Columns, Rows+n, Columns+n, RowLine1, ColLine1, \
                   RowLine2, ColLine2, Row, Column, IsParallel)
  dev_set_color ('blue')
  disp_line (WindowHandle, Row, Column-2, Row, Column+2)
  disp_line (WindowHandle, Row-2, Column, Row+2, Column)
  n := n+8
endfor

(C)

create_tuple(&rowA1, 1)\;
set_i(rowA1, 8, 0)\;
create_tuple(&columnA1, 1)\;
set_i(columnA1, 7, 0)\;
create_tuple(&rowA2, 1)\;
set_i(rowA2, 15, 0)\;
create_tuple(&columnA2, 1)\;
set_i(columnA2, 11, 0)\;
create_tuple(&RowB1, 1)\;
set_i(RowB1, 2, 0)\;
create_tuple(&ColumnB1, 1)\;
set_i(ColumnB1, 4, 0)\;
create_tuple(&RowB2, 1)\;
set_i(RowB2, 6, 0)\;
create_tuple(&ColumnB2, 1)\;
set_i(ColumnB2, 10, 0)\;
T_intersection_ll(rowA1,columnA1,rowA2,columnA2,RowB1,ColumnB1,RowB2,
                  ColumnB2,&row_i,&column_i,&parallel)\;
aa_min = get_d(row_i,0)\;
aa_max = get_d(column_i,0)\;

Result🔗

intersection_llIntersectionLl returns 2 (H_MSG_TRUE).

Module🔗

Foundation