+ Slvs_Param aParam;
+ Slvs_Entity aPoint;
+ double anArcParams[3][2];
+ for (int i = 0; i < 3; i++) {
+ aPoint = myStorage->getEntity(theArc.point[i]);
+ for (int j = 0; j < 2; j++) {
+ aParam = myStorage->getParameter(aPoint.param[j]);
+ anArcParams[i][j] = aParam.val;
+ if (i > 0)
+ anArcParams[i][j] -= anArcParams[0][j];
+ }
+ }
+ double aRad2 = anArcParams[1][0] * anArcParams[1][0] + anArcParams[1][1] * anArcParams[1][1];
+ double aDist2 = anArcParams[2][0] * anArcParams[2][0] + anArcParams[2][1] * anArcParams[2][1];
+ if (std::fabs(aRad2 - aDist2) < tolerance)
+ return; // nothing to update (last point already on the arc)
+ if (aDist2 < tolerance)
+ return; // unable to update
+ double aCoeff = std::sqrt(aRad2 / aDist2);
+ anArcParams[2][0] *= aCoeff;
+ anArcParams[2][1] *= aCoeff;
+
+ // Update last point
+ aPoint = myStorage->getEntity(theArc.point[2]);
+ for (int i = 0; i < 2; i++) {
+ aParam = Slvs_MakeParam(aPoint.param[i], myGroup->getId(),
+ anArcParams[0][i] + anArcParams[2][i]);
+ myStorage->updateParameter(aParam);
+ }
+}