question

Rather than using dragStart and dragEnd function_s commands, you can set the values of the curved conveyor directly, such as the code below.

A curved conveyor is specified in FlexSim via the location (mid of circle), start angle, sweep angle, and radius.

Object dwg = model().find("FlexsimModelBackground");
Table vertexLocations = getvarnode(dwg, "snapPoints").subnodes["Vertex Locations"];
Table lines = getvarnode(dwg, "snapPoints").subnodes["Lines"];
Table arcs = getvarnode(dwg, "snapPoints").subnodes["Arcs"];

treenode LibraryCurvedConveyor = node("?CurvedConveyor", library());
for(int j = 1; j <= arcs.numRows; j++) 
{ 
	int startIndex = arcs[j][1] + 1; 
	double x1 = vertexLocations[startIndex][1]; 
	double y1 = vertexLocations[startIndex][2]; 
	double z1 = vertexLocations[startIndex][3]; 
	int endIndex = arcs[j][2] + 1; 
	double x2 = vertexLocations[endIndex][1];
	double y2 = vertexLocations[endIndex][2]; 
	double z2 = vertexLocations[endIndex][3]; 
	int centerIndex = arcs[j][3] + 1;
	double x3 = vertexLocations[centerIndex][1];
	double y3 = vertexLocations[centerIndex][2]; 
	double z3 = vertexLocations[centerIndex][3]; 
	double StartAngle = Math.degrees(arcs[j][4]); 
	double EndAngle = Math.degrees(arcs[j][5]);
	double SweepAngle = EndAngle - StartAngle;
	if (SweepAngle < 0) {
		SweepAngle += 360;
	}

	Conveyor curved_conveyor = createinstance(LibraryCurvedConveyor, model()); 
	curved_conveyor.setLocation(x3,y3,z3);
	
	double dx = x3 - x1; 
	double dy = y3 - y1; 
	double dz = z3 - z1; 
	double radius = sqrt(dx*dx + dy*dy); 
	 
	setvarnum(curved_conveyor, "rise", dz);
	setvarnum(curved_conveyor, "startAngle", StartAngle);
	setvarnum(curved_conveyor, "sweepAngle", SweepAngle);
	setvarnum(curved_conveyor, "radius", radius);

	function_s(curved_conveyor,"finalizeSpatialChanges");
}