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/************************************************************************/
/* */
/* Various definitions relating to document geometry. */
/* */
/************************************************************************/
# ifndef GEO_2D_INTEGER_H
# define GEO_2D_INTEGER_H
typedef struct DocumentRectangle
{
int drX0;
int drY0;
int drX1;
int drY1;
} DocumentRectangle;
# define RECTDEB(dr) appDebug( "%s(%3d): %s= [%d..%d x %d..%d]\n", \
__FILE__, __LINE__, #dr, \
(dr)->drX0, (dr)->drX1, \
(dr)->drY0, (dr)->drY1 )
typedef struct Point2DI
{
int p2diX;
int p2diY;
} Point2DI;
# define geo2DIPointInBox( p, b ) \
( (p)->p2diX >= (b)->drX0 && \
(p)->p2diX <= (b)->drX1 && \
(p)->p2diY >= (b)->drY0 && \
(p)->p2diY <= (b)->drY1 )
/************************************************************************/
/* */
/* Routine declarations. */
/* */
/************************************************************************/
extern void docInitRectangle( DocumentRectangle * dr );
extern void docUnionRectangle( DocumentRectangle * dr,
const DocumentRectangle * dr1,
const DocumentRectangle * dr2 );
extern void docNormalizeRectangle(
DocumentRectangle * drTo,
const DocumentRectangle * drFrom );
extern int docIntersectRectangle( DocumentRectangle * dr,
const DocumentRectangle * dr1,
const DocumentRectangle * dr2 );
extern int geo2DIIntersectSegments( Point2DI * p1,
Point2DI * p2,
double * pXab1,
double * pXab2,
double * pXcd1,
double * pXcd2,
const Point2DI * ab,
const Point2DI * cd );
extern double geo2DIDistanceToLine( const Point2DI * ab,
const Point2DI * c );
extern double geo2DIProjectionOnLine( const Point2DI * ab,
const Point2DI * c );
extern int geo2DIPointInPolygon( const Point2DI * p,
const Point2DI * points,
int pointCount );
extern int geo2DIClipSegmentToRectangle(
Point2DI vpChanged[2],
double * pXp0,
double * pXp1,
const Point2DI vp[2],
const DocumentRectangle * dr );
# endif /* GEO_2D_INTEGER_H */
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