IfcGradient

IFC4x3/Sections/Domain specific data schemas/Schemas/IfcStructuralElementsDomain/Entities/IfcTendonConduit/DocEntity.xml

@@ -19,3 +19,4 @@
 		</DocWhereRule>
 	</WhereRules>
 </DocEntity>
+

IFC4x3/Sections/Resource definition data schemas/Schemas/IfcGeometryResource/Entities/IfcCompositeCurveSegment/DocEntity.xml

@@ -24,3 +24,4 @@
 		</DocWhereRule>
 	</WhereRules>
 </DocEntity>
+

IFC4x3/Sections/Resource definition data schemas/Schemas/IfcGeometryResource/Functions/IfcFactorial/DocFunction.xml

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<DocFunction xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" Name="IfcFactorial" UniqueId="4a06ac8f-08a8-4f36-a6bc-a14d9330560f" />
+

IFC4x3/Sections/Resource definition data schemas/Schemas/IfcGeometryResource/Functions/IfcFactorial/Documentation.md

@@ -0,0 +1 @@
+Factorial implementation "x!".

IFC4x3/Sections/Resource definition data schemas/Schemas/IfcGeometryResource/Functions/IfcFactorial/Expression.txt

@@ -0,0 +1,15 @@
+(IfcInteger Factor) : IfcInteger;
+
+  LOCAL
+    Fac : IfcInteger := 1;
+  END_LOCAL;
+
+  IF Factor = 0 THEN
+    RETURN 1;
+  END_IF;
+
+  REPEAT i := 1 TO Factor
+    Fac = Fac * i;
+  END_REPEAT;
+
+  RETURN Fac;

IFC4x3/Sections/Resource definition data schemas/Schemas/IfcGeometryResource/Functions/IfcGradient/Expression.txt

@@ -1,2 +1,36 @@
-(GradientCurve : IfcGradientCurve) : IfcLengthMeasure;
-  RETURN(1);
+(GradientCurve : IfcGradientCurve, Position : IfcCurveMeasureSelect) : IfcLengthMeasure;
+
+  REPEAT i := 1 TO SIZEOF(GradientCurve.Segments);//GradientCurve.BaseCurve\IfcCompositeCurve.Segments;
+    Segment : IfcCurveSegment := GradientCurve.Segments[i];
+    NextSegment : IfcCurveSegment := GradientCurve.Segments[i + 1];
+    Location : IfcCartesianPoint := NextSegment\IfcCurveSegment.Placement\IfcAxis2Placement2D.Location\IfcCartesianPoint;
+    SegmentPlacement : IfcAxis2Placement2D := Segment.Placement\IfcAxis2Placement2D;
+
+    IF (Location[1] > Position)
+      CASE TRUE OF
+
+        'IFCCIRCLE' IN TYPEOF(Segment.BaseCurve) :
+          BEGIN
+            RETURN SegmentPlacement.Location\IfcCartesianPoint[2] + Segment.BaseCurve.Radius * (COS(ACOS(SegmentPlacement.RefDirection[1]) / 2 - Segment.SegmentLength) - (Position - SegmentPlacement.Location\IfcCartesianPoint[1]));
+          END;
+
+        'IFCCLOTHOID' IN TYPEOF(Segment.BaseCurve) :
+          BEGIN			
+            RETURN SegmentPlacement.Location\IfcCartesianPoint[2] + 1/3 * Segment.SegmentLength ** 3 + 1/(3 * IfcFactorial(7)) * Segment.SegmentLength ** 7 + 1/(5 * IfcFactorial(11)) * Segment.SegmentLength ** 11;
+          END;		
+
+          'IFCLINE' IN TYPEOF(Segment.BaseCurve) :
+            BEGIN
+              RETURN SegmentPlacement.Location\IfcCartesianPoint[2] + Segment.BaseCurve\IfcLine.Pnt[2] + Segment.BaseCurve\IfcLine.Dir.Orientation[2] * Segment.BaseCurve\IfcLine.Dir.Magnitude * Segment.SegmentLength;
+            END;
+
+          'IFCPOLYLINE' IN TYPEOF(Segment.BaseCurve) :
+            BEGIN
+              RETURN SegmentPlacement.Location\IfcCartesianPoint[2] + (Segment.BaseCurve.Points[2].Coordinates[2] - Segment.BaseCurve.Points[1].Coordinates[2]) * Segment.SegmentLength;
+            END;
+
+          OTHERWISE : RETURN(?);
+      END_CASE;
+    END_IF;
+  END_REPEAT;
+  RETURN(?);