
Oracle® Spatial Java API Reference 11g Release 1 (11.1) B2840102 

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java.lang.Object
oracle.spatial.topo.CompGeom
public class CompGeom
Constructor Summary  

CompGeom() 
Method Summary  

static int 
arcArcIntersect(double arc1x1, double arc1y1, double arc1x2, double arc1y2, double c1x, double c1y, double r1, double arc2x1, double arc2y1, double arc2x2, double arc2y2, double c2x, double c2y, double r2, double[] result1, double[] result2) Finds the openset intersection(s) of two arc segments, if any. 
static boolean 
areSegmentsParallel(double a1x, double a1y, double a2x, double a2y, double b1x, double b1y, double b2x, double b2y, boolean sameSenseOnly) 
static boolean 
areSegmentsParallel(Point2DD a1, Point2DD a2, Point2DD b1, Point2DD b2, boolean sameSenseOnly) Finds whether two line segments are parallel or, optionally, antiparallel. 
static void 
augmentMBR(Point2DD[] mbrAdd, Point2DD[] mbrTarget) Expands target MBR to encompass added one. 
static void 
crossProduct(double[] r1, double[] r2, double[] result) 3D crossproduct via arrays. 
static double 
crossProduct(double x1, double y1, double x2, double y2) 
static double 
crossProduct(Point2DD p1, Point2DD p2) 
static double 
dotProduct(double x1, double y1, double x2, double y2) 
static double 
dotProduct(Point2DD p1, Point2DD p2) 
static boolean 
incPointInPolygon(Point2DD p, Point2DD[] q, boolean state) Incremental Point in Polygon routine taking a string of coordinates representing a part (or all) of a ring boundary. 
static boolean 
inLineRange(double px, double py, double x1, double y1, double x2, double y2) computes whether the test point is on the open set of the input line segment with the assumption that the point is already known to be on the infinite line of which the line segment is a part. 
static boolean 
inSector(double px, double py, double sp1x, double sp1y, double sp2x, double sp2y, double sp3x, double sp3y) inSector determines whether a line drawn from the middle vertex of a triad of vertices to a test point lies within the sector defined by the triad. 
static boolean 
inSector(Point2DD p, Point2DD[] sectorPoints) inSector determines whether a line drawn from the middle vertex of a triad of vertices to a test point lies within the sector defined by the triad. 
static int 
lineArcIntersect(double x1, double y1, double x2, double y2, double arc_x1, double arc_y1, double arc_x2, double arc_y2, double xc, double yc, double r, double[] result1, double[] result2) Finds the openset intersection of line and arc segments, if any. 
static boolean 
lineLineIntersect(double a1x, double a1y, double a2x, double a2y, double b1x, double b1y, double b2x, double b2y, double[] c) Finds the openset intersection of two line segments, if any. 
static boolean 
lineLineIntersect(Point2DD a1, Point2DD a2, Point2DD b1, Point2DD b2, Point2DD c) Finds the openset intersection of two line segments, if any. 
static void 
main(java.lang.String[] args) 
static boolean 
pointInMBR(double px, double py, double[][] mbr) Determines if a point is within the bounds of the specified rectangle. 
static boolean 
pointInMBR(Point2DD p, Point2DD[] mbr) Determines if a point is within the bounds of the specified rectangle. 
Methods inherited from class java.lang.Object 

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait 
Constructor Detail 

public CompGeom()
Method Detail 

public static double dotProduct(Point2DD p1, Point2DD p2)
public static double crossProduct(Point2DD p1, Point2DD p2)
public static double dotProduct(double x1, double y1, double x2, double y2)
public static double crossProduct(double x1, double y1, double x2, double y2)
public static void crossProduct(double[] r1, double[] r2, double[] result)
public static boolean inSector(Point2DD p, Point2DD[] sectorPoints)
p
 The test pointsectorPoints
 The triad to be tested. Vertex [0] and [2] are the endpoints. Vertex [1] is the central vertex.public static boolean inLineRange(double px, double py, double x1, double y1, double x2, double y2)
If the point is equal to one of the endpoints this routine will return false;
px
 The test point x valuepy
 The test point y valuex1
 x value of line segment point 1y1
 y value of line segment point 1x2
 x value of line segment point 2y2
 y value of line segment point 2public static boolean inSector(double px, double py, double sp1x, double sp1y, double sp2x, double sp2y, double sp3x, double sp3y)
px
 The test point x valuepy
 The test point y valuesp1x
 x value of triad point 1sp1y
 y value of triad point 1sp2x
 x value of triad point 2, the central vertexsp2y
 y value of triad point 2sp3x
 x value of triad point 3sp3y
 y value of triad point 3public static void augmentMBR(Point2DD[] mbrAdd, Point2DD[] mbrTarget)
mbrAdd
 the one to be addedmbrTarget
 the one that is augmented if necessarypublic static boolean pointInMBR(Point2DD p, Point2DD[] mbr) throws java.lang.Exception
p
 the point to be tested.mbr
 an array of Point2DD. [0] is the rectangle lower left corner. [1] is the rectangle upper right corner.java.lang.Exception
public static boolean pointInMBR(double px, double py, double[][] mbr)
px
 x component of the point to be tested.py
 y component of the point to be tested.mbr
 a 2x2 array of doubles. First index is x,y. Second is min,maxpublic static boolean incPointInPolygon(Point2DD p, Point2DD[] q, boolean state)
p
 The test pointq
 The portion or all of the polygon perimeterstate
 the current in/out status of the determination. Set false intitiallypublic static int lineArcIntersect(double x1, double y1, double x2, double y2, double arc_x1, double arc_y1, double arc_x2, double arc_y2, double xc, double yc, double r, double[] result1, double[] result2)
return values 0  no intersections
1  one touching (tangent) intersection
1  one crossing intersection
2  two crossing intersections; inorder on both segments
2  two crossing intersections; opposite order (placed inorder on the line)
Resulting intersections are placed in the result1 and result2 arrays.
x1
 x value of first endpoint of line segmenty1
 y value of first endpoint of line segmentx2
 x value of second endpoint of line segmenty2
 y value of second endpoint of line segmentarc_x1
 x of first endpoint of arc in counterclockwise sensearc_y1
 y of first endpoint of arc in counterclockwise sensearc_x2
 x of second endpoint of arc in counterclockwise sensearc_y2
 y of second endpoint of arc in counterclockwise sensexc
 x value of center of arc segmentyc
 y value of center of arc segmentr
 radius of arcresult1
 a 2D array of intersection x,y pair if there are one or more open set intersections. Will be allocated here if not allocated by caller.result2
 a 2D array of intersection x,y pair if there are two open set intersections. Will be allocated here if not allocated by caller.public static int arcArcIntersect(double arc1x1, double arc1y1, double arc1x2, double arc1y2, double c1x, double c1y, double r1, double arc2x1, double arc2y1, double arc2x2, double arc2y2, double c2x, double c2y, double r2, double[] result1, double[] result2)
return values 0  no intersections
1  one touching (tangent) intersection
1  one crossing intersection
2  two crossing intersections; inorder on both segments
2  two crossing intersections; opposite order (placed inorder on the first arc)
Resulting intersections are placed in the result1 and result2 arrays.
x1
 x value of first endpoint of line segmenty1
 y value of first endpoint of line segmentx2
 x value of second endpoint of line segmenty2
 y value of second endpoint of line segmentarc_x1
 x of first endpoint of arc in counterclockwise sensearc_y1
 y of first endpoint of arc in counterclockwise sensearc_x2
 x of second endpoint of arc in counterclockwise sensearc_y2
 y of second endpoint of arc in counterclockwise sensexc
 x value of center of arc segmentyc
 y value of center of arc segmentr
 radius of arcresult1
 a 2D array of intersection x,y pair if there are one or more open set intersections. Will be allocated here if not allocated by caller.result2
 a 2D array of intersection x,y pair if there are two open set intersections. Will be allocated here if not allocated by caller.public static boolean lineLineIntersect(Point2DD a1, Point2DD a2, Point2DD b1, Point2DD b2, Point2DD c)
a1
 the first endpoint of line segment aa2
 the second endpoint of line segment ab1
 the first endpoint of line segment bb2
 the second endpoint of line segment bc
 the intersection (if any). Not set if there is no intersection.public static boolean lineLineIntersect(double a1x, double a1y, double a2x, double a2y, double b1x, double b1y, double b2x, double b2y, double[] c)
a1x
 the first endpoint xvalue of line segment aa1y
 the first endpoint yvalue of line segment aa2x
 the first endpoint xvalue of line segment aa2y
 the first endpoint yvalue of line segment ab1x
 the first endpoint xvalue of line segment bb1y
 the first endpoint yvalue of line segment bb2x
 the first endpoint xvalue of line segment bb2y
 the first endpoint yvalue of line segment ac
 the intersection (if any). Not set if there is no intersection.public static boolean areSegmentsParallel(Point2DD a1, Point2DD a2, Point2DD b1, Point2DD b2, boolean sameSenseOnly)
a1
 the first point of the a segmenta2
 the second point of the a segmentb1
 the first point of the b segmentb2
 the second point of the b segemntsameSenseOnly
 whether parallel only or both parallel/antiparallel passpublic static boolean areSegmentsParallel(double a1x, double a1y, double a2x, double a2y, double b1x, double b1y, double b2x, double b2y, boolean sameSenseOnly)
public static void main(java.lang.String[] args) throws java.io.IOException
java.io.IOException

Oracle® Spatial Java API Reference 11g Release 1 (11.1) B2840102 

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