IsObliqueTriangle Class Reference

Inheritance diagram for IsObliqueTriangle:

Collaboration diagram for IsObliqueTriangle:

Public Member Functions
String	getURI ()
boolean	attribute (Geometry geom)
Value	evaluate (ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException

Static Package Functions
static double	lengthSquare (Coordinate p1, Coordinate p2)

Member Function Documentation

attribute()

boolean attribute

(

Geometry

geom

)

Reimplemented from GeometricBinaryAttributeFunction.

                                                {
                if (geom instanceof Polygon) {
                if(geom.getCoordinates().length==3) {
                        Coordinate A=geom.getCoordinates()[0];
                        Coordinate B=geom.getCoordinates()[1];
                        Coordinate C=geom.getCoordinates()[2];
                        double a2 = lengthSquare(B,C); 
                        double b2 = lengthSquare(A,C); 
                        double c2 = lengthSquare(A,B); 
                              
                        // length of sides be a, b, c 
                        double a = Math.sqrt(a2); 
                        double b = Math.sqrt(b2); 
                        double c = Math.sqrt(c2); 
                              
                        // From Cosine law 
                        double alpha = Math.acos((b2 + c2 - a2)/(2*b*c)); 
                        double betta = Math.acos((a2 + c2 - b2)/(2*a*c)); 
                        double gamma = Math.acos((a2 + b2 - c2)/(2*a*b)); 
                              
                        // Converting to degree 
                        alpha = (alpha * 180 / Math.PI); 
                        betta = (betta * 180 / Math.PI); 
                        gamma = (gamma * 180 / Math.PI); 
  
                        if(alpha<90 && betta<90 && gamma<90)
                                return true;
                        return false;
                }
                }
                return false;
        }

References IsObliqueTriangle.lengthSquare().

evaluate()

Value evaluate ( ValueFactory  valueFactory, Value...  args  ) throws ValueExprEvaluationException

inherited

                                                                                                            {
                if (args.length != 1) {
                        throw new ValueExprEvaluationException(getURI() + " requires exactly 1 arguments, got " + args.length);
                }
                
                LiteralType l=LiteralRegistry.getLiteral(((Literal)args[0]).getDatatype().toString());
                System.out.println(l);
                if(l instanceof VectorLiteral) {
                        Geometry geom=((VectorLiteral)l).read(args[0].stringValue());
                        boolean result = attribute(geom);
                        return valueFactory.createLiteral(result);
                }
                throw new ValueExprEvaluationException("Argument given is not a geometry literal");
 
        }

References GeometricBinaryAttributeFunction.attribute(), and LiteralRegistry.getLiteral().

Referenced by IsCollectionTest.testGeometryCollectionIsCollection(), HasConnectedInteriorTest.testHasConnectedInteriorFalse(), HasConnectedInteriorTest.testHasConnectedInteriorTrue(), HasDuplicateRingsTest.testHasDuplicateRingsFalse(), HasDuplicateRingsTest.testHasDuplicateRingsTrue(), HasHorizontalCRSTest.testHasHorizontalCRSFalse(), HasHorizontalCRSTest.testHasHorizontalCRSTrue(), HasRepeatedPointsTest.testHasRepeatedPoints(), HasRepeatedPointsTest.testHasRepeatedPoints2(), HasSelfIntersectionsTest.testHasSelfIntersectionsFalse(), HasSelfIntersectionsTest.testHasSelfIntersectionsTrue(), Is3DTest.testIs3DFalse(), IsAcuteTest.testIsAcuteFalse(), IsAcuteTest.testIsAcuteTrue(), IsConvexTest.testIsConvexFalse(), IsConvexTest.testIsConvexTrue(), IsEmptyTest.testIsEmptyFalse(), IsEmptyTest.testIsEmptyTrue(), IsEquilateralTriangleTest.testIsEquilateralTriangleFalse(), IsEquilateralTriangleTest.testIsEquilateralTriangleTrue(), IsIsocelesTriangleTest.testIsIsocelesTriangleFalse(), IsIsocelesTriangleTest.testIsIsocelesTriangleTrue(), IsMeasuredTest.testIsMeasuredFalse(), IsMeasuredTest.testIsMeasuredTrue(), IsNodingValidTest.testIsNodingValuedTrue(), IsObliqueTriangleTest.testIsObliqueTriangleFalse(), IsObtuseTriangleTest.testIsObliqueTriangleFalse(), IsObliqueTriangleTest.testIsObliqueTriangleTrue(), IsObtuseTriangleTest.testIsObliqueTriangleTrue(), IsPlanarTest.testIsPlanarTrue(), IsPolygonCCWTest.testIsPolygonCCWFalse(), IsPolygonCCWTest.testIsPolygonCCWTrue(), IsPolygonCWTest.testIsPolygonCWFalse(), IsPolygonCWTest.testIsPolygonCWTrue(), IsRectangleTest.testIsRectangleFalse(), IsRectangleTest.testIsRectangleTrue(), IsRightTriangleTest.testIsRightTriangleFalse(), IsRightTriangleTest.testIsRightTriangleTrue(), IsSolidTest.testIsSolidFalse(), IsSquareTest.testIsSquareFalse(), IsSquareTest.testIsSquareTrue(), IsTriangleTest.testIsTriangleFalse(), IsTriangleTest.testIsTriangleTrue(), IsValidTest.testIsValidFalse(), IsValidTest.testIsValidTrue(), IsClosedTest.testLineStringClosed(), IsCollectionTest.testLineStringIsCollection(), IsRingTest.testLineStringIsNotRing(), IsRingTest.testLineStringIsRing(), IsClosedTest.testLineStringNotClosed(), IsCollectionTest.testMultiLineStringIsCollection(), IsClosedTest.testMultiLineStringNotClosed(), IsClosedTest.testmultiPointClosed(), IsCollectionTest.testMultiPointIsCollection(), IsCollectionTest.testMultiPolygonIsCollection(), IsClosedTest.testpointClosed(), IsCollectionTest.testPointIsCollection(), IsCollectionTest.testPolygonIsCollection(), SridHasFlippedAxisTest.testSridHasFlippedAxis(), SridIsGeographicTest.testSridIsGeographicFalse(), SridIsGeographicTest.testSridIsGeographicTrue(), SridIsProjectedTest.testSridIsProjectedTrue(), and SridIsVerticalTest.testSridIsVerticalTrue().

getURI()

String getURI

(

)

                               {
                return POSTGIS.st_isOblique.stringValue();
        }

References POSTGIS.st_isOblique.

lengthSquare()

static double lengthSquare ( Coordinate  p1, Coordinate  p2  )

staticpackage

            { 
                double xDiff = p1.x- p2.x; 
                double yDiff = p1.y- p2.y; 
                return xDiff*xDiff + yDiff*yDiff; 
            } 

Referenced by IsObliqueTriangle.attribute().