| Operators |
angle_lx — Calculate the angle between one line and the horizontal axis.
The operator angle_lx calculates the angle between one line and the horizontal axis. As input the coordinates of two points on the line (Row1,Column1, Row2,Column2) are expected. The calculation is performed as follows: We interprete the line as a vector with starting point Row1,Column1 and end point Row2,Column2. The starting point is on the horizontal axis and defines the center of rotation in the following consideration. If the end point is above the horizontal axis, the angle (with positive sign) results from the rotation of the horizontal axis in counter clockwise direction onto the vector. If the end point is below the horizontal axis, the angle (with negative sign) results from the rotation of the horizontal axis in clockwise direction onto the vector. The result depends on the order of the two points defining the line. The parameter Angle returns the angle in radians, ranging from
Row coordinate the first point of the line.
Column coordinate of the first point of the line.
Row coordinate of the second point of the line.
Column coordinate of the second point of the line.
Angle between the line and the horizontal axis [rad].
dev_open_window (0, 0, 512, 512, 'black', WindowHandle) RowA1 := 255 ColumnA1 := 10 RowA2 := 255 ColumnA2 := 501 gen_contour_polygon_xld (Contour, [RowA1,RowA2], [ColumnA1,ColumnA2]) Row1 := 255 Column1 := 255 for I := 5 to 360 by 5 Row2 := 255 - sin(rad(I)) * 200 Column2 := 255 + cos(rad(I)) * 200 gen_contour_polygon_xld (Contour, [Row1,Row2], [Column1,Column2]) angle_lx (Row1, Column1, Row2, Column2, Angle) AngleDeg := deg(Angle) endfor
angle_lx returns 2 (H_MSG_TRUE).
Foundation
| Operators |