kicad/include/trigo.h

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/*************/
/* trigo.h */
/*************/
#ifndef TRIGO_H
#define TRIGO_H
void RotatePoint( int *pX, int *pY, int angle );
void RotatePoint( int *pX, int *pY, int cx, int cy, int angle );
void RotatePoint( wxPoint* point, int angle );
void RotatePoint( wxPoint *point, const wxPoint & centre, int angle );
void RotatePoint( double *pX, double *pY, int angle );
void RotatePoint( double *pX, double *pY, double cx, double cy, int angle );
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/* Return the arc tangent of 0.1 degrees coord vector dx, dy
* between -1800 and 1800
* Equivalent to atan2 (but faster for calculations if
* the angle is 0 to -1800, or + - 900
*/
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int ArcTangente( int dy, int dx );
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bool DistanceTest( int seuil, int dx, int dy, int spot_cX, int spot_cY );
//! @brief Compute the distance between a line and a reference point
//! Reference: http://mathworld.wolfram.com/Point-LineDistance2-Dimensional.html
//! @param linePointA Point on line
//! @param linePointB Point on line
//! @param referencePoint Reference point
double DistanceLinePoint( wxPoint linePointA, wxPoint linePointB, wxPoint referencePoint );
//! @brief Euclidean norm of a 2D vector
//! @param vector Two-dimensional vector
//! @return Euclidean norm of the vector
double EuclideanNorm( wxPoint vector );
//! @brief Vector between two points
//! @param startPoint The start point
//! @param endPoint The end point
//! @return Vector between the points
wxPoint TwoPointVector( wxPoint startPoint, wxPoint endPoint );
//! @brief Test, if two points are near each other
//! @param pointA First point
//! @param pointB Second point
//! @param threshold The maximum distance
//! @return True or false
bool HitTestPoints( wxPoint pointA, wxPoint pointB, double threshold );
//! @brief Determine the cross product
//! @param vectorA Two-dimensional vector
//! @param vectorB Two-dimensional vector
int CrossProduct( wxPoint vectorA, wxPoint vectorB );
/**
* Function TestSegmentHit
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* test for hit on line segment
* i.e. cursor within a given distance from segment
* @param aRefPoint = cursor (point to test) coords
* @param aStart is the first end-point of the line segment
* @param aEnd is the second end-point of the line segment
* @param aDist = maximum distance for hit
*/
bool TestSegmentHit( wxPoint aRefPoint, wxPoint aStart, wxPoint aEnd, int aDist );
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/**
* Function GetLineLength
* returns the length of a line segment defined by \a aPointA and \a aPointB.
* @return Length of a line.
*/
double GetLineLength( const wxPoint& aPointA, const wxPoint& aPointB );
/*******************/
/* Macro NEW_COORD */
/*******************/
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/* Calculate coordinates to rotate around an axis
* coord: xrot = y + x * sin * cos
* yrot = y * cos - sin * x
* either: xrot = (y + x * tg) * cos
* yrot = (y - x * tg) * cos
*
* Cosine coefficients are loaded from a trigometric table by 16 bit values.
*/
#define NEW_COORD( x0, y0 ) \
do { \
int itmp; \
itmp = x0; \
x0 = x0 + (int)( y0 * tg ); \
y0 = y0 - (int)( itmp * tg ); \
x0 = ( x0 * cosinus ) >> 8; \
y0 = ( y0 * cosinus ) >> 8; \
} while( 0 );
extern double fsinus[];
extern double fcosinus[];
#endif