dmtxvector2.c File Reference

libdmtx - Data Matrix Encoding/Decoding Library Copyright 2008, 2009 Mike Laughton. More...

#include <assert.h>
#include <math.h>
#include "dmtx.h"
#include "dmtxstatic.h"

Go to the source code of this file.

Functions
DmtxVector2 *	dmtxVector2AddTo (INOUT DmtxVector2 *v1, const DmtxVector2 *v2)
	向量相加
DmtxVector2 *	dmtxVector2Add (OUT DmtxVector2 *vOut, const DmtxVector2 *v1, const DmtxVector2 *v2)
	向量相加
DmtxVector2 *	dmtxVector2SubFrom (INOUT DmtxVector2 *v1, const DmtxVector2 *v2)
	向量相减
DmtxVector2 *	dmtxVector2Sub (OUT DmtxVector2 *vOut, const DmtxVector2 *v1, const DmtxVector2 *v2)
	向量相减
DmtxVector2 *	dmtxVector2ScaleBy (INOUT DmtxVector2 *v, double s)
	向量数乘
DmtxVector2 *	dmtxVector2Scale (OUT DmtxVector2 *vOut, const DmtxVector2 *v, double s)
	向量数乘
double	dmtxVector2Cross (const DmtxVector2 *v1, const DmtxVector2 *v2)
	二维向量叉积
double	dmtxVector2Norm (INOUT DmtxVector2 *v)
	归一化
double	dmtxVector2Dot (const DmtxVector2 *v1, const DmtxVector2 *v2)
	二维向量点积
double	dmtxVector2Mag (const DmtxVector2 *v)
	二维向量的模
double	dmtxDistanceFromRay2 (const DmtxRay2 *r, const DmtxVector2 *q)
	计算点到直线的垂直距离
double	dmtxDistanceAlongRay2 (const DmtxRay2 *r, const DmtxVector2 *q)
DmtxPassFail	dmtxRay2Intersect (OUT DmtxVector2 *point, const DmtxRay2 *p0, const DmtxRay2 *p1)
	判断两条直线是否相交，并计算交点。
DmtxPassFail	dmtxPointAlongRay2 (OUT DmtxVector2 *point, const DmtxRay2 *r, double t)
	计算直线上特定位置的点

Detailed Description

libdmtx - Data Matrix Encoding/Decoding Library Copyright 2008, 2009 Mike Laughton.

All rights reserved. Copyright 2012-2016 Vadim A. Misbakh-Soloviov. All rights reserved.

See LICENSE file in the main project directory for full terms of use and distribution.

Contact: Vadim A. Misbakh-Soloviov dmtx@.nosp@m.mva..nosp@m.name Mike Laughton mike@.nosp@m.drag.nosp@m.onfly.nosp@m.logi.nosp@m.c.com

二维向量数学运算

Definition in file dmtxvector2.c.

Function Documentation

dmtxDistanceAlongRay2()

double dmtxDistanceAlongRay2 ( const DmtxRay2 * r, const DmtxVector2 * q )

extern

Definition at line 145 of file dmtxvector2.c.

dmtxDistanceFromRay2()

double dmtxDistanceFromRay2 ( const DmtxRay2 * r, const DmtxVector2 * q )

extern

计算点到直线的垂直距离

Definition at line 131 of file dmtxvector2.c.

dmtxPointAlongRay2()

DmtxPassFail dmtxPointAlongRay2 ( OUT DmtxVector2 * point, const DmtxRay2 * r, double t )

extern

计算直线上特定位置的点

I = p + t·v

Parameters

[out]	point	点I的坐标。
[in]	r	直线
[in]	t	表示沿射线方向的位置参数（从射线起点开始测量的距离）。

Definition at line 195 of file dmtxvector2.c.

dmtxRay2Intersect()

DmtxPassFail dmtxRay2Intersect ( OUT DmtxVector2 * point, const DmtxRay2 * p0, const DmtxRay2 * p1 )

extern

判断两条直线是否相交，并计算交点。

用向量叉乘求直线交点 https://www.cnblogs.com/zhb2000/p/vector-cross-product-solve-intersection.html

Parameters

point	交点坐标（如果存在）
p0	第一条直线
p1	第二条直线

Returns

返回DmtxPass表示射线相交，并已计算出交点；返回DmtxFail表示射线不相交或几乎平行。

Definition at line 170 of file dmtxvector2.c.

dmtxVector2Add()

DmtxVector2 * dmtxVector2Add ( OUT DmtxVector2 * vOut, const DmtxVector2 * v1, const DmtxVector2 * v2 )

extern

向量相加

Definition at line 37 of file dmtxvector2.c.

dmtxVector2AddTo()

DmtxVector2 * dmtxVector2AddTo ( INOUT DmtxVector2 * v1, const DmtxVector2 * v2 )

extern

向量相加

Definition at line 26 of file dmtxvector2.c.

dmtxVector2Cross()

double dmtxVector2Cross ( const DmtxVector2 * v1, const DmtxVector2 * v2 )

extern

二维向量叉积

Definition at line 89 of file dmtxvector2.c.

dmtxVector2Dot()

double dmtxVector2Dot ( const DmtxVector2 * v1, const DmtxVector2 * v2 )

extern

二维向量点积

Definition at line 115 of file dmtxvector2.c.

dmtxVector2Mag()

double dmtxVector2Mag ( const DmtxVector2 * v )

extern

二维向量的模

Definition at line 123 of file dmtxvector2.c.

dmtxVector2Norm()

double dmtxVector2Norm ( INOUT DmtxVector2 * v )

extern

归一化

Definition at line 97 of file dmtxvector2.c.

dmtxVector2Scale()

DmtxVector2 * dmtxVector2Scale ( OUT DmtxVector2 * vOut, const DmtxVector2 * v, double s )

extern

向量数乘

Definition at line 79 of file dmtxvector2.c.

dmtxVector2ScaleBy()

DmtxVector2 * dmtxVector2ScaleBy ( INOUT DmtxVector2 * v, double s )

extern

向量数乘

Definition at line 68 of file dmtxvector2.c.

dmtxVector2Sub()

DmtxVector2 * dmtxVector2Sub ( OUT DmtxVector2 * vOut, const DmtxVector2 * v1, const DmtxVector2 * v2 )

extern

向量相减

Definition at line 58 of file dmtxvector2.c.

dmtxVector2SubFrom()

DmtxVector2 * dmtxVector2SubFrom ( INOUT DmtxVector2 * v1, const DmtxVector2 * v2 )

extern

向量相减

Definition at line 47 of file dmtxvector2.c.