/* -----------------------------------------------------------------------------
 *
 * Copyright (c) 2022 Alexis Naveros.
 * Feel free to use however you want.
 *
 * Highly accurate intersection point between two int64_t line segments
 * Input must be within the [-INT64_MAX/2,INT64_MAX/2] range
 *
 * ----------------------------------------------------------------------------- */

/* Check line intersection: yes */
/* Return non-zero if line segments intersect, don't compute the intersection point */
int mathLineLine_Check( int64_t l0p0x, int64_t l0p0y, int64_t l0p1x, int64_t l0p1y, int64_t l1p0x, int64_t l1p0y, int64_t l1p1x, int64_t l1p1y );

/* Check line intersection: yes */
/* Get intersection hit point: yes */
/* Return non-zero if line segments intersect, intersection point stored in hitpt */
int mathLineLine_CheckHit( int64_t *hitpt, int64_t l0p0x, int64_t l0p0y, int64_t l0p1x, int64_t l0p1y, int64_t l1p0x, int64_t l1p0y, int64_t l1p1x, int64_t l1p1y );

/* Check line intersection: no */
/* Get intersection hit point: yes */
/* Accurate intersection outside lines: no */
/* SIGFPE protection: yes */
/* Overflow checking: no */
/* Return non-zero on success, intersection point stored in hitpt */
/* This function does NOT check against integer overflow, if the intersection point is out of numerical range */
/* Use only when you know the intersection point is in the neighborhood of the two segments */
int mathLineLine_HitSafe( int64_t *hitpt, int64_t l0p0x, int64_t l0p0y, int64_t l0p1x, int64_t l0p1y, int64_t l1p0x, int64_t l1p0y, int64_t l1p1x, int64_t l1p1y );

/* Check line intersection: no */
/* Get intersection hit point: yes */
/* Accurate intersection outside lines: yes */
/* SIGFPE protection: yes */
/* Overflow checking: yes */
/* Return non-zero on success, intersection point stored in hitpt */
/* Return zero if parallel or intersection point outside of numerical range */
int mathLineLine_HitAnySafeRobust( int64_t *hitpt, int64_t l0p0x, int64_t l0p0y, int64_t l0p1x, int64_t l0p1y, int64_t l1p0x, int64_t l1p0y, int64_t l1p1x, int64_t l1p1y );