stack around the variable corrupted

This is a discussion on stack around the variable corrupted within the C++ Programming forums, part of the General Programming Boards category; hi everyone, i am getting this runtime check error, stack around the variable"line_coords;" is corrupted, can anyone help me. Code: ...

  1. #1
    Registered User
    Join Date
    Dec 2007
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    78

    Arrow stack around the variable corrupted

    hi everyone,

    i am getting this runtime check error,

    stack around the variable"line_coords;" is corrupted,

    can anyone help me.

    Code:
    void defGeometry::populateGeometry(int nthPoint1, int nthPoint2)
    {		///////////////////////////////////////////////
    		//Initializing variables                     //
    		//Points that control the split of splines  ///
    		///////////////////////////////////////////////
    		nthN1Point = nthPoint1;
    		nthN2Point = nthPoint2;
    	////////////////////////////////////////////////////////////////
    	//To determine whether or not its Wicket gate or runner blade //
    	//If weicket gate then openEnd is ture otherwise if			  //	
    	//runner blade it is false.                                   //
    	////////////////////////////////////////////////////////////////
    		
    	bool openEnd = true;	
    	for(int i=0;i<ActionSide.NumberOfSections;i++)
    	{
    		tag_t	Spline1_tag=NULL_TAG,
    				Spline2_tag=NULL_TAG,
    				Spline3_tag=NULL_TAG,
    				Spline4_tag=NULL_TAG,
    				line;
    
    		struct Section Spline1,
    					   Spline2,
    					   Spline3,
    					   Spline4;
    
    		UF_CURVE_line_t line_coords;
    		geometricSection tempGeomSect;
    
    		double tangentPoints[4][3];
    
    		////////////////////////////////////////////////////////////
    		//We have created spline2 & spline3 first to get vectors  //
    		//at start & end point of splines to maintain tangency    //
    		//between consuective splines							  //
    		////////////////////////////////////////////////////////////
    
    		Spline2 = SectionXtractPoints(ActionSide.Sections[i]);
    		Spline2_tag = createSplineThruPoints(Spline2);
    		
    		tempGeomSect.section_tags[2]=Spline2_tag;
    
    		Spline3 = SectionXtractPoints(ReactionSide.Sections[i]);
    		Spline3_tag = createSplineThruPoints(Spline3);
    
    		tempGeomSect.section_tags[3]=Spline3_tag;
    		////////////////////////////////////////////////////////////////////////
    		//call for collecting vectors at start& end point of spline2 & spline3// 
    		////////////////////////////////////////////////////////////////////////
    		makeTangentPoints(tempGeomSect,tangentPoints);
    
    		////////////////////////////////////////////////////////
    		//CREATE THE NOZE SPLINES 1 AND 4					  //	
    		////////////////////////////////////////////////////////
    		//Only to create the Spline4                          //
    		//We have to reverse the vectors                      //
    		//For that we will use two temp vectors of section type/
    		////////////////////////////////////////////////////////
    
    		Spline1 = formSection(ActionSide.Sections[i],ReactionSide.Sections[i],nthN1Point);
    		Spline1_tag = createSplineThruPoints(Spline1,tangentPoints[0],tangentPoints[2]);
    
    		tempGeomSect.section_tags[1]=Spline1_tag;
    
    		//////////////////////////////////////////////////////////////////////////////
    		//If runner blade then we have to do the splie for tail end as well.		//
    		//Other wise if Wicket Gate we need to create a line rather than splitting. //
    		//////////////////////////////////////////////////////////////////////////////
    		
    		if(openEnd == false)
    		{
    			Section RevActSection = ActionSide.Sections[i];
    			Section RevReActSection = ReactionSide.Sections[i];
    		
    			vector<point> tmppts1(RevActSection.Points.rbegin(),RevActSection.Points.rend());
    			vector<point> tmppts2(RevReActSection.Points.rbegin(),RevReActSection.Points.rend());
    
    			RevActSection.Points = tmppts1;
    			RevReActSection.Points = tmppts2;
    
    			Spline4 = formSection(RevActSection,RevReActSection,nthN2Point);
    			Spline4_tag = createSplineThruPoints(Spline4,tangentPoints[1],tangentPoints[3]);
    		}
    		else
    		{
    			line_coords.start_point[3]=Spline2.Points[NumberOfPoints-nthN2Point-nthN1Point+1].pt[3];
    			line_coords.end_point[3]  =Spline3.Points[NumberOfPoints-nthN2Point-nthN1Point+1].pt[3];
    
    			UF_CURVE_create_line (&line_coords,& line );	
    		}
    		tempGeomSect.section_tags[4]=Spline4_tag;
    
    		UF_CALL(UF_OBJ_set_name(Spline1_tag,"spline11"));
    		UF_CALL(UF_OBJ_set_name(Spline2_tag,"spline22"));
    		UF_CALL(UF_OBJ_set_name(Spline3_tag,"spline33"));
    		UF_CALL(UF_OBJ_set_name(Spline4_tag,"spline44"));
    
    		sections.push_back(tempGeomSect);	
    	}
    }
    Section defGeometry::formSection( struct Section Section1,struct Section Section2,int nthPoint)
    {
    	int j;
    	struct Section defGeomSecTemp;
    	
    	for(j=(nthPoint-1);j>=0;j--)
    	{
    		defGeomSecTemp.Points.push_back(Section1.Points[j]);		
    	}
    	
    	for(j=1;j<nthPoint;j++)
    	{
    		defGeomSecTemp.Points.push_back(Section2.Points[j]);	
    	}
    	
    	defGeomSecTemp.NumberOfPoints = defGeomSecTemp.Points.size();
    	defGeomSecTemp.NumberOfPoints = nthN1Point+nthN2Point-1;	
    
    	return  defGeomSecTemp;
    }
    Section defGeometry::SectionXtractPoints(struct Section Section1)
    {
    	int j;
    	struct Section defGeomSecTemp;
    	for(j=(nthN1Point-1);j<(NumberOfPoints-nthN2Point+1);j++)
    	{
    	  defGeomSecTemp.Points.push_back(Section1.Points[j]);	  
    	}
    	defGeomSecTemp.NumberOfPoints=NumberOfPoints-(nthN1Point+nthN2Point-2);
    
    	return defGeomSecTemp;
    }
    tag_t defGeometry::createSplineThruPoints(struct Section thruSplineData)
    {
    	int	degree=3,
    		periodicity=0,
    		save_def_data = 0;
    	
    	double *p_par=NULL;
    	
    	tag_t thruSplineTag=NULL_TAG, ReplacedSpline=NULL_TAG;
    	
    	UF_CURVE_pt_slope_crvatr_t point_data[1000];
    	
    	for(int i=0; i<thruSplineData.NumberOfPoints; i++)
    	{
    		UF_VEC3_copy(thruSplineData.Points[i].pt,point_data[i].point);
    		point_data[i].slope_type = UF_CURVE_SLOPE_AUTO;
    		point_data[i].crvatr_type = UF_CURVE_CRVATR_NONE;
    	}
    	UF_CALL(UF_CURVE_create_spline_thru_pts(degree, periodicity,thruSplineData.NumberOfPoints,
    											point_data,p_par,save_def_data,&thruSplineTag));
    	
    	if(!thruSplineTag)
    	{
    		sysLogPrint("Failed to create spline %s", thruSplineData.Name);
    		return NULL_TAG;
    	}	
    	return thruSplineTag;
    }

  2. #2
    Cat without Hat CornedBee's Avatar
    Join Date
    Apr 2003
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    8,893
    tempGeomSect.section_tags[4]=Spline4_tag;
    Are you sure section_tags is 5 elements long?
    All the buzzt!
    CornedBee

    "There is not now, nor has there ever been, nor will there ever be, any programming language in which it is the least bit difficult to write bad code."
    - Flon's Law

  3. #3
    C++まいる!Cをこわせ! Elysia's Avatar
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    Oct 2007
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    22,538
    This error is typically called when you write to data that you don't own. For example, writing beyond the size of an array.
    So check what CornedBee mentions to see if it isn't writing data out of bounds.
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.

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