projection_plprojection_plProjectionPlProjectionPlprojection_pl (算子名称)
名称
projection_plprojection_plProjectionPlProjectionPlprojection_pl — Calculate the projection of a point onto a line.
参数签名
Herror projection_pl(double Row, double Column, double Row1, double Column1, double Row2, double Column2, double* RowProj, double* ColProj)
Herror T_projection_pl(const Htuple Row, const Htuple Column, const Htuple Row1, const Htuple Column1, const Htuple Row2, const Htuple Column2, Htuple* RowProj, Htuple* ColProj)
void ProjectionPl(const HTuple& Row, const HTuple& Column, const HTuple& Row1, const HTuple& Column1, const HTuple& Row2, const HTuple& Column2, HTuple* RowProj, HTuple* ColProj)
static void HMisc::ProjectionPl(const HTuple& Row, const HTuple& Column, const HTuple& Row1, const HTuple& Column1, const HTuple& Row2, const HTuple& Column2, HTuple* RowProj, HTuple* ColProj)
static void HMisc::ProjectionPl(double Row, double Column, double Row1, double Column1, double Row2, double Column2, double* RowProj, double* ColProj)
static void HOperatorSet.ProjectionPl(HTuple row, HTuple column, HTuple row1, HTuple column1, HTuple row2, HTuple column2, out HTuple rowProj, out HTuple colProj)
static void HMisc.ProjectionPl(HTuple row, HTuple column, HTuple row1, HTuple column1, HTuple row2, HTuple column2, out HTuple rowProj, out HTuple colProj)
static void HMisc.ProjectionPl(double row, double column, double row1, double column1, double row2, double column2, out double rowProj, out double colProj)
def projection_pl(row: MaybeSequence[Union[float, int]], column: MaybeSequence[Union[float, int]], row_1: MaybeSequence[Union[float, int]], column_1: MaybeSequence[Union[float, int]], row_2: MaybeSequence[Union[float, int]], column_2: MaybeSequence[Union[float, int]]) -> Tuple[Sequence[float], Sequence[float]]
def projection_pl_s(row: MaybeSequence[Union[float, int]], column: MaybeSequence[Union[float, int]], row_1: MaybeSequence[Union[float, int]], column_1: MaybeSequence[Union[float, int]], row_2: MaybeSequence[Union[float, int]], column_2: MaybeSequence[Union[float, int]]) -> Tuple[float, float]
描述
The operator projection_plprojection_plProjectionPlProjectionPlProjectionPlprojection_pl calculates the projection of a
point (RowRowRowRowrowrow,ColumnColumnColumnColumncolumncolumn) onto a line which is
represented by the two points (Row1Row1Row1Row1row1row_1,Column1Column1Column1Column1column1column_1) and
(Row2Row2Row2Row2row2row_2,Column2Column2Column2Column2column2column_2). The coordinates of the projected
point are returned in RowProjRowProjRowProjRowProjrowProjrow_proj and ColProjColProjColProjColProjcolProjcol_proj.
运行信息
- Multithreading type: reentrant (runs in parallel with non-exclusive operators).
- Multithreading scope: global (may be called from any thread).
- Processed without parallelization.
参数表
RowRowRowRowrowrow (input_control) point.y(-array) → HTupleMaybeSequence[Union[float, int]]HTupleHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong)
Row coordinate of the point.
ColumnColumnColumnColumncolumncolumn (input_control) point.x(-array) → HTupleMaybeSequence[Union[float, int]]HTupleHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong)
Column coordinate of the point.
Row1Row1Row1Row1row1row_1 (input_control) point.y(-array) → HTupleMaybeSequence[Union[float, int]]HTupleHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong)
Row coordinate of the first point on the line.
Column1Column1Column1Column1column1column_1 (input_control) point.x(-array) → HTupleMaybeSequence[Union[float, int]]HTupleHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong)
Column coordinate of the first point on the line.
Row2Row2Row2Row2row2row_2 (input_control) point.y(-array) → HTupleMaybeSequence[Union[float, int]]HTupleHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong)
Row coordinate of the second point on the line.
Column2Column2Column2Column2column2column_2 (input_control) point.x(-array) → HTupleMaybeSequence[Union[float, int]]HTupleHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong)
Column coordinate of the second point on the line.
RowProjRowProjRowProjRowProjrowProjrow_proj (output_control) real(-array) → HTupleSequence[float]HTupleHtuple (real) (double) (double) (double)
Row coordinate of the projected point.
ColProjColProjColProjColProjcolProjcol_proj (output_control) real(-array) → HTupleSequence[float]HTupleHtuple (real) (double) (double) (double)
Column coordinate of the projected point
例程 (HDevelop)
dev_open_window (0, 0, 512, 512, 'black', WindowHandle)
Row1 := 300
Column1 := 200
Row2 := 140
Column2 := 400
Rows := 300
Columns := 170
dev_set_color ('cadet blue')
gen_contour_polygon_xld (Contour, [Row1,Row2], [Column1,Column2])
Offset := 0
for Rows := 40 to 280 by 40
dev_set_color ('red')
gen_cross_contour_xld (Point,Rows+Offset, Columns, 6, 0)
projection_pl (Rows+Offset, Columns, Row1, Column1, Row2, Column2, \
RowProj, ColProj)
dev_set_color ('blue')
gen_cross_contour_xld (RowP, RowProj, ColProj, 6, 0)
Offset := Offset+30
endfor
例程 (C)
projection_pl(row,column,row1,column1,row2,column2,
&row_proj,&col_proj);
例程 (HDevelop)
dev_open_window (0, 0, 512, 512, 'black', WindowHandle)
Row1 := 300
Column1 := 200
Row2 := 140
Column2 := 400
Rows := 300
Columns := 170
dev_set_color ('cadet blue')
gen_contour_polygon_xld (Contour, [Row1,Row2], [Column1,Column2])
Offset := 0
for Rows := 40 to 280 by 40
dev_set_color ('red')
gen_cross_contour_xld (Point,Rows+Offset, Columns, 6, 0)
projection_pl (Rows+Offset, Columns, Row1, Column1, Row2, Column2, \
RowProj, ColProj)
dev_set_color ('blue')
gen_cross_contour_xld (RowP, RowProj, ColProj, 6, 0)
Offset := Offset+30
endfor
例程 (HDevelop)
dev_open_window (0, 0, 512, 512, 'black', WindowHandle)
Row1 := 300
Column1 := 200
Row2 := 140
Column2 := 400
Rows := 300
Columns := 170
dev_set_color ('cadet blue')
gen_contour_polygon_xld (Contour, [Row1,Row2], [Column1,Column2])
Offset := 0
for Rows := 40 to 280 by 40
dev_set_color ('red')
gen_cross_contour_xld (Point,Rows+Offset, Columns, 6, 0)
projection_pl (Rows+Offset, Columns, Row1, Column1, Row2, Column2, \
RowProj, ColProj)
dev_set_color ('blue')
gen_cross_contour_xld (RowP, RowProj, ColProj, 6, 0)
Offset := Offset+30
endfor
例程 (HDevelop)
dev_open_window (0, 0, 512, 512, 'black', WindowHandle)
Row1 := 300
Column1 := 200
Row2 := 140
Column2 := 400
Rows := 300
Columns := 170
dev_set_color ('cadet blue')
gen_contour_polygon_xld (Contour, [Row1,Row2], [Column1,Column2])
Offset := 0
for Rows := 40 to 280 by 40
dev_set_color ('red')
gen_cross_contour_xld (Point,Rows+Offset, Columns, 6, 0)
projection_pl (Rows+Offset, Columns, Row1, Column1, Row2, Column2, \
RowProj, ColProj)
dev_set_color ('blue')
gen_cross_contour_xld (RowP, RowProj, ColProj, 6, 0)
Offset := Offset+30
endfor
结果
projection_plprojection_plProjectionPlProjectionPlProjectionPlprojection_pl returns 2 (
H_MSG_TRUE)
.
模块
Foundation