/*------------------------------------------------------------------------------*
 * File Name: ManipulateCurves.c												*
 * Creation: ER, 02/10/05														*
 * Purpose: Programming Example													*
 * Copyright (c) OriginLab Corp.2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010	*
 * All Rights Reserved															*
 * 																				*
 * Modification Log:															*
 *------------------------------------------------------------------------------*/
 
#include <Origin.h>

////////////////////////////////////////////////////////////////////////////////////
// This function shows how to create curve objects and then call a lower level 
// function that works with the curve data.
//
void manipulate_curves()
{
	// Assumes worksheet is active with 4 cols set as XYXY and first two 
	// columns have some data
	// Declare worksheet object
	Worksheet wks = Project.ActiveLayer();
	// Declare two curve objects, one for input based on first two cols
	// and one for output based on 3rd, 4th cols of wks
	Curve crvIn(wks, 0, 1);
	Curve crvOut(wks, 2, 3);
	if( !crvIn || !crvOut )
	{
		out_str("Could not declare curves!");
		return;
	}
	
	// Call lower level funtion to compute
	int iRet = my_curve_func(crvIn, crvOut, 100, 0.1);
	if( 0 != iRet )
		printf("Lower level function call returned error code: %d\n", iRet);
}


// This lower level function accepts reference two curvebase objects, one for 
// input curve and one for output curve. The Y value of the output curve is 
// set to dPar * Y of input curve. The X value of output curve is set to 
// nPar + X as input curve. This is just an example to show how to access X and Y
// of the curves.
static int my_curve_func(curvebase& crvInput, curvebase& crvOutput, int nPar, double dPar)
{
	// Manipulating the curve directly is equivalent to manipulating the Y
	crvOutput = crvInput * dPar;
	
	// To manipulate the X, need to first attach datasets to X part of the curves
	Dataset dsXInput, dsXOutput;
	crvInput.AttachX(dsXInput);
	crvOutput.AttachX(dsXOutput);
	// Check validity - return error if could not attach X
	if( !dsXInput || !dsXOutput ) return 1;

	// Set X of output curve
	dsXOutput = dsXInput + nPar;
	
	// X and Y can be manipulated using datasets such as above.
	// If however it is desired to get the curve X, Y data into vectors and 
	// manipulate the vectors instead, the following can be done:
	// Get copies of X, Y of input curve into vectors
	vector vecX, vecY;
	crvInput.CopyData(vecX, vecY);
	
	// Manipulate the vectors
	vecY *= dPar;
	vecX += nPar;
	
	// The vector values can be set back to output curve as follows:
	// For Y of curve, assign directly
	crvOutput = vecY;
	// For X, need to get X dataset of curve (which we did earlier)
	dsXOutput = vecX;

	return 0;
}
////////////////////////////////////////////////////////////////////////////////////