A* Pathfinding Project
3.8
The A* Pathfinding Project for Unity 3D

Various vector math utility functions. More...
Various vector math utility functions.
Note the difference between segments and lines. Lines are infinitely long but segments have only a finite length.
Static Public Member Functions  
static Vector3  ClosestPointOnLine (Vector3 lineStart, Vector3 lineEnd, Vector3 point) 
Returns the closest point on the line.  
static float  ClosestPointOnLineFactor (Vector3 lineStart, Vector3 lineEnd, Vector3 point) 
Factor along the line which is closest to the point.  
static float  ClosestPointOnLineFactor (Int3 lineStart, Int3 lineEnd, Int3 point) 
Factor along the line which is closest to the point.  
static float  ClosestPointOnLineFactor (Int2 lineStart, Int2 lineEnd, Int2 point) 
Factor of the nearest point on the segment.  
static Vector3  ClosestPointOnSegment (Vector3 lineStart, Vector3 lineEnd, Vector3 point) 
Returns the closest point on the segment.  
static Vector3  ClosestPointOnSegmentXZ (Vector3 lineStart, Vector3 lineEnd, Vector3 point) 
Returns the closest point on the segment in the XZ plane.  
static bool  IsClockwiseMarginXZ (Vector3 a, Vector3 b, Vector3 c) 
Returns if the points a in a clockwise order.  
static bool  IsClockwiseOrColinear (Int2 a, Int2 b, Int2 c) 
Returns true if the points a in a clockwise order or if they are colinear.  
static bool  IsClockwiseOrColinearXZ (Int3 a, Int3 b, Int3 c) 
Returns true if the points a in a clockwise order or if they are colinear.  
static bool  IsClockwiseXZ (Vector3 a, Vector3 b, Vector3 c) 
Returns if the points a in a clockwise order.  
static bool  IsClockwiseXZ (Int3 a, Int3 b, Int3 c) 
Returns if the points a in a clockwise order.  
static bool  IsColinearAlmostXZ (Int3 a, Int3 b, Int3 c) 
Returns if the points are colinear (lie on a straight line)  
static bool  IsColinearXZ (Int3 a, Int3 b, Int3 c) 
Returns if the points are colinear (lie on a straight line)  
static bool  IsColinearXZ (Vector3 a, Vector3 b, Vector3 c) 
Returns if the points are colinear (lie on a straight line)  
static Vector3  LineDirIntersectionPointXZ (Vector3 start1, Vector3 dir1, Vector3 start2, Vector3 dir2) 
Intersection point between two infinite lines.  
static Vector3  LineDirIntersectionPointXZ (Vector3 start1, Vector3 dir1, Vector3 start2, Vector3 dir2, out bool intersects) 
Intersection point between two infinite lines.  
static bool  LineIntersectionFactorXZ (Int3 start1, Int3 end1, Int3 start2, Int3 end2, out float factor1, out float factor2) 
Returns the intersection factors for line 1 and line 2.  
static bool  LineIntersectionFactorXZ (Vector3 start1, Vector3 end1, Vector3 start2, Vector3 end2, out float factor1, out float factor2) 
Returns the intersection factors for line 1 and line 2.  
static float  LineIntersectionFactorXZ (Vector3 start1, Vector3 end1, Vector3 start2, Vector3 end2) 
Returns the intersection factor for line 1 with line 2.  
static Vector2  LineIntersectionPoint (Vector2 start1, Vector2 end1, Vector2 start2, Vector2 end2) 
Returns the intersection point between the two lines.  
static Vector2  LineIntersectionPoint (Vector2 start1, Vector2 end1, Vector2 start2, Vector2 end2, out bool intersects) 
Returns the intersection point between the two lines.  
static Vector3  LineIntersectionPointXZ (Vector3 start1, Vector3 end1, Vector3 start2, Vector3 end2) 
Returns the intersection point between the two lines.  
static Vector3  LineIntersectionPointXZ (Vector3 start1, Vector3 end1, Vector3 start2, Vector3 end2, out bool intersects) 
Returns the intersection point between the two lines.  
static float  LineRayIntersectionFactorXZ (Int3 start1, Int3 end1, Int3 start2, Int3 end2) 
Returns the intersection factor for line 1 with ray 2.  
static bool  RaySegmentIntersectXZ (Int3 start1, Int3 end1, Int3 start2, Int3 end2) 
Returns if the ray (start1, end1) intersects the segment (start2, end2).  
static bool  RightOrColinear (Vector2 a, Vector2 b, Vector2 p) 
Returns if p lies on the right side of the line a  b.  
static bool  RightOrColinear (Int2 a, Int2 b, Int2 p) 
Returns if p lies on the right side of the line a  b.  
static bool  RightOrColinearXZ (Vector3 a, Vector3 b, Vector3 p) 
Returns if p lies on the left side of the line a  b.  
static bool  RightOrColinearXZ (Int3 a, Int3 b, Int3 p) 
Returns if p lies on the left side of the line a  b.  
static bool  RightXZ (Vector3 a, Vector3 b, Vector3 p) 
Returns if p lies on the right side of the line a  b.  
static bool  RightXZ (Int3 a, Int3 b, Int3 p) 
Returns if p lies on the right side of the line a  b.  
static Vector3  SegmentIntersectionPointXZ (Vector3 start1, Vector3 end1, Vector3 start2, Vector3 end2, out bool intersects) 
Returns the intersection point between the two line segments in XZ space.  
static bool  SegmentIntersectsBounds (Bounds bounds, Vector3 a, Vector3 b) 
Does the line segment intersect the bounding box.  
static bool  SegmentsIntersect (Int2 start1, Int2 end1, Int2 start2, Int2 end2) 
Returns if the line segment start2  end2 intersects the line segment start1  end1.  
static bool  SegmentsIntersectXZ (Int3 start1, Int3 end1, Int3 start2, Int3 end2) 
Returns if the line segment start2  end2 intersects the line segment start1  end1.  
static bool  SegmentsIntersectXZ (Vector3 start1, Vector3 end1, Vector3 start2, Vector3 end2) 
Returns if the two line segments intersects.  
static long  SignedTriangleAreaTimes2XZ (Int3 a, Int3 b, Int3 c) 
Signed area of a triangle in the XZ plane multiplied by 2.  
static float  SignedTriangleAreaTimes2XZ (Vector3 a, Vector3 b, Vector3 c) 
Signed area of a triangle in the XZ plane multiplied by 2.  
static float  SqrDistancePointSegment (Vector3 a, Vector3 b, Vector3 p) 
Returns the squared distance between p and the segment ab.  
static float  SqrDistancePointSegmentApproximate (int x, int z, int px, int pz, int qx, int qz) 
Returns the approximate shortest squared distance between x,z and the segment pq.  
static float  SqrDistancePointSegmentApproximate (Int3 a, Int3 b, Int3 p) 
Returns the approximate shortest squared distance between x,z and the segment pq.  
static float  SqrDistanceSegmentSegment (Vector3 s1, Vector3 e1, Vector3 s2, Vector3 e2) 
3D minimum distance between 2 segments.  
static float  SqrDistanceXZ (Vector3 a, Vector3 b) 
Squared distance between two points in the XZ plane.  

static 
Returns the closest point on the line.
The line is treated as infinite.

static 
Factor along the line which is closest to the point.
Returned value is in the range [0,1] if the point lies on the segment otherwise it just lies on the line. The closest point can be calculated using (endstart)*factor + start.
Factor along the line which is closest to the point.
Returned value is in the range [0,1] if the point lies on the segment otherwise it just lies on the line. The closest point can be calculated using (endstart)*factor + start
Factor of the nearest point on the segment.
Returned value is in the range [0,1] if the point lies on the segment otherwise it just lies on the line. The closest point can be calculated using (endstart)*factor + start;

static 
Returns the closest point on the segment.
The segment is NOT treated as infinite.

static 
Returns the closest point on the segment in the XZ plane.
The y coordinate of the result will be the same as the y coordinate of the point parameter.
The segment is NOT treated as infinite.

static 
Returns if the points a in a clockwise order.
Will return true even if the points are colinear or very slightly counterclockwise (if the signed area of the triangle formed by the points has an area less than or equals to float.Epsilon)
Returns true if the points a in a clockwise order or if they are colinear.
Returns true if the points a in a clockwise order or if they are colinear.

static 
Returns if the points a in a clockwise order.
Returns if the points a in a clockwise order.
Returns if the points are colinear (lie on a straight line)
Returns if the points are colinear (lie on a straight line)

static 
Returns if the points are colinear (lie on a straight line)

static 
Intersection point between two infinite lines.
Note that start points and directions are taken as parameters instead of start and end points. Lines are treated as infinite. If the lines are parallel 'start1' will be returned. Intersections are calculated on the XZ plane.

static 
Intersection point between two infinite lines.
Note that start points and directions are taken as parameters instead of start and end points. Lines are treated as infinite. If the lines are parallel 'start1' will be returned. Intersections are calculated on the XZ plane.

static 
Returns the intersection factors for line 1 and line 2.
The intersection factors is a distance along the line start  end where the other line intersects it.
Lines are treated as infinite.
false is returned if the lines are parallel and true if they are not. Only the XZ coordinates are used.

static 
Returns the intersection factors for line 1 and line 2.
The intersection factors is a distance along the line start  end where the other line intersects it.
Lines are treated as infinite.
false is returned if the lines are parallel and true if they are not. Only the XZ coordinates are used.

static 
Returns the intersection factor for line 1 with line 2.
The intersection factor is a distance along the line start1  end1 where the line start2  end2 intersects it.
. Lines are treated as infinite.
1 is returned if the lines are parallel (note that this is a valid return value if they are not parallel too)

static 
Returns the intersection point between the two lines.
Lines are treated as infinite. start1 is returned if the lines are parallel

static 
Returns the intersection point between the two lines.
Lines are treated as infinite. start1 is returned if the lines are parallel

static 
Returns the intersection point between the two lines.
Lines are treated as infinite. start1 is returned if the lines are parallel

static 
Returns the intersection point between the two lines.
Lines are treated as infinite. start1 is returned if the lines are parallel
Returns the intersection factor for line 1 with ray 2.
The intersection factors is a factor distance along the line start  end where the other line intersects it.
Lines are treated as infinite.
The second "line" is treated as a ray, meaning only matches on start2 or forwards towards end2 (and beyond) will be returned If the point lies on the wrong side of the ray start, Nan will be returned.
NaN is returned if the lines are parallel.
Returns if the ray (start1, end1) intersects the segment (start2, end2).
false is returned if the lines are parallel. Only the XZ coordinates are used.

static 
Returns if p lies on the right side of the line a  b.
Also returns true if the points are colinear.
Returns if p lies on the right side of the line a  b.
Also returns true if the points are colinear.

static 
Returns if p lies on the left side of the line a  b.
Uses XZ space. Also returns true if the points are colinear.
Returns if p lies on the left side of the line a  b.
Uses XZ space. Also returns true if the points are colinear.

static 
Returns if p lies on the right side of the line a  b.
Uses XZ space. Does not return true if the points are colinear.
Returns if p lies on the right side of the line a  b.
Uses XZ space. Does not return true if the points are colinear.

static 
Returns the intersection point between the two line segments in XZ space.
Lines are NOT treated as infinite. start1 is returned if the line segments do not intersect The point will be returned along the line [start1, end1] (this matters only for the y coordinate).

static 
Does the line segment intersect the bounding box.
The line is NOT treated as infinite.
Returns if the line segment start2  end2 intersects the line segment start1  end1.
If only the endpoints coincide, the result is undefined (may be true or false).
Returns if the line segment start2  end2 intersects the line segment start1  end1.
If only the endpoints coincide, the result is undefined (may be true or false).

static 
Returns if the two line segments intersects.
The lines are NOT treated as infinite (just for clarification)
Signed area of a triangle in the XZ plane multiplied by 2.
This will be negative for clockwise triangles and positive for counterclockwise ones

static 
Signed area of a triangle in the XZ plane multiplied by 2.
This will be negative for clockwise triangles and positive for counterclockwise ones.

static 
Returns the squared distance between p and the segment ab.
The line is not considered infinite.

static 
Returns the approximate shortest squared distance between x,z and the segment pq.
The segment is not considered infinite. This function is not entirely exact, but it is about twice as fast as DistancePointSegment2.
Returns the approximate shortest squared distance between x,z and the segment pq.
The segment is not considered infinite. This function is not entirely exact, but it is about twice as fast as DistancePointSegment2.

static 
3D minimum distance between 2 segments.
Input: two 3D line segments S1 and S2

static 
Squared distance between two points in the XZ plane.