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/* vector.h: operations on vectors and points. */
#ifndef VECTOR_H
#define VECTOR_H
#include "point.h"
#include "exception.h"
/* Our vectors are represented as displacements along the x and y axes. */
typedef struct
{
float dx, dy, dz;
} Vector;
Vector
vector_fromPoint(Point const c);
Vector
vector_fromTwoPoints(Point const c1,
Point const c2);
Point
vector_toPoint_point(Vector const v);
/* Definitions for these common operations can be found in any decent
linear algebra book, and most calculus books.
*/
float
vector_magnitude(Vector const v);
Vector
vector_normalized(Vector const v);
Vector
vector_sum(Vector const addend,
Vector const adder);
float
vector_dotProduct(Vector const v1,
Vector const v2);
Vector
vector_scaled(Vector const v,
float const r);
float
vector_angle(Vector const inVector,
Vector const outVector,
at_exception_type * const exP);
Point
vector_sumPoint(Point const c,
Vector const v);
Point
vector_diffPoint(Point const c,
Vector const v);
pm_pixelcoord
vector_sumIntPoint(pm_pixelcoord const c,
Vector const v);
Vector
vector_abs(Vector const v);
Vector
vector_pointDirection(Point const final,
Point const initial);
Vector
vector_IPointDiff(pm_pixelcoord const coord1,
pm_pixelcoord const coord2);
Vector
vector_horizontal(void);
Vector
vector_zero(void);
bool
vector_equal(Vector const comparand,
Vector const comparator);
#endif
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