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      1 /*
      2  * Copyright (C) 2008 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef bts_FLT16VEC2D_EM_H
     18 #define bts_FLT16VEC2D_EM_H
     19 
     20 /* ---- includes ----------------------------------------------------------- */
     21 
     22 #include "b_BasicEm/Basic.h"
     23 #include "b_BasicEm/Phase.h"
     24 #include "b_TensorEm/Int16Vec2D.h"
     25 
     26 /* ---- related objects  --------------------------------------------------- */
     27 
     28 /* ---- typedefs ----------------------------------------------------------- */
     29 
     30 /* ---- constants ---------------------------------------------------------- */
     31 
     32 /* ---- object definition -------------------------------------------------- */
     33 
     34 /** 2d vector with floating point */
     35 struct bts_Flt16Vec2D
     36 {
     37 
     38 	/* ---- private data --------------------------------------------------- */
     39 
     40 	/* ---- public data ---------------------------------------------------- */
     41 
     42 	/** x component */
     43 	int16 xE;
     44 
     45 	/** y component */
     46 	int16 yE;
     47 
     48 	/** point position */
     49 	int16 bbpE;
     50 };
     51 
     52 /* ---- associated objects ------------------------------------------------- */
     53 
     54 /* ---- external functions ------------------------------------------------- */
     55 
     56 /* ---- \ghd{ constructor/destructor } ------------------------------------- */
     57 
     58 /** initializes vector */
     59 void bts_Flt16Vec2D_init( struct bts_Flt16Vec2D* ptrA );
     60 
     61 /** destroys vector */
     62 void bts_Flt16Vec2D_exit( struct bts_Flt16Vec2D* ptrA );
     63 
     64 /* ---- \ghd{ operators } -------------------------------------------------- */
     65 
     66 /** copy operator */
     67 void bts_Flt16Vec2D_copy( struct bts_Flt16Vec2D* ptrA, const struct bts_Flt16Vec2D* srcPtrA );
     68 
     69 /** equal operator */
     70 flag bts_Flt16Vec2D_equal( const struct bts_Flt16Vec2D* ptrA, const struct bts_Flt16Vec2D* srcPtrA );
     71 
     72 /* ---- \ghd{ query functions } -------------------------------------------- */
     73 
     74 /* ---- \ghd{ modify functions } ------------------------------------------- */
     75 
     76 /* ---- \ghd{ memory I/O } ------------------------------------------------- */
     77 
     78 /* ---- \ghd{ exec functions } --------------------------------------------- */
     79 
     80 /** creates vector from 16 bit values */
     81 struct bts_Flt16Vec2D bts_Flt16Vec2D_create16( int16 xA, int16 yA, int16 bbpA );
     82 
     83 /** creates vector from 16 bit vactor */
     84 struct bts_Flt16Vec2D bts_Flt16Vec2D_createVec16( struct bts_Int16Vec2D vecA, int16 bbpA );
     85 
     86 /** creates vector from 32 bit values (automatic adjustment of bbp value) */
     87 struct bts_Flt16Vec2D bts_Flt16Vec2D_create32( int32 xA, int32 yA, int32 bbpA );
     88 
     89 
     90 /** dot product of vectors; return bbp is  vec1PtrA->bbpE + vec2PtrA->bbpE */
     91 int32 bts_Flt16Vec2D_dotPrd( const struct bts_Flt16Vec2D* vec1PtrA,
     92 							 const struct bts_Flt16Vec2D* vec2PtrA );
     93 
     94 /** returns square norm of vector; return bbp is  ptrA->bbpE * 2 */
     95 uint32 bts_Flt16Vec2D_norm2( const struct bts_Flt16Vec2D* ptrA );
     96 
     97 /** returns norm of vector; return bbp is ptrA->bbpE*/
     98 uint16 bts_Flt16Vec2D_norm( const struct bts_Flt16Vec2D* ptrA );
     99 
    100 /** normalizes vector; bbpA defines number of bits behind the point */
    101 void bts_Flt16Vec2D_normalize( struct bts_Flt16Vec2D* ptrA );
    102 
    103 /** returns normalized vector; bbpA defines number of bits behind the point */
    104 struct bts_Flt16Vec2D bts_Flt16Vec2D_normalized( const struct bts_Flt16Vec2D* ptrA );
    105 
    106 /** computes angle between vector and x axis*/
    107 phase16 bts_Flt16Vec2D_angle( const struct bts_Flt16Vec2D* vecPtrA );
    108 
    109 /** computes angle between two vectors */
    110 phase16 bts_Flt16Vec2D_enclosedAngle( const struct bts_Flt16Vec2D* vec1PtrA,
    111 									  const struct bts_Flt16Vec2D* vec2PtrA );
    112 
    113 /** adds two vectors; returns resulting vector */
    114 struct bts_Flt16Vec2D bts_Flt16Vec2D_add( struct bts_Flt16Vec2D vec1A, struct bts_Flt16Vec2D vec2A );
    115 
    116 /** subtracts vec1A - vec2A; returns resulting vector */
    117 struct bts_Flt16Vec2D bts_Flt16Vec2D_sub( struct bts_Flt16Vec2D vec1A, struct bts_Flt16Vec2D vec2A );
    118 
    119 /** multiplies vecor with scalar; returns resulting vector */
    120 struct bts_Flt16Vec2D bts_Flt16Vec2D_mul( struct bts_Flt16Vec2D vecA, int16 factorA, int32 bbpFactorA );
    121 
    122 /** converts vecA into bts_Int16Vec2D */
    123 struct bts_Int16Vec2D bts_Flt16Vec2D_int16Vec2D( struct bts_Flt16Vec2D vecA, int32 dstBbpA );
    124 
    125 #endif /* bts_FLT16VEC2D_EM_H */
    126 
    127