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Basic Curves And Surfaces Modeler

, 18 Apr 2012
A basic demo of modeling curves and surfaces in OpenGL.
cadsurfexe.zip
CadSurfexe
CadSurf.exe
VKGeom.dll
VKGraphic.dll
cadsurf_demo.zip
cadsurf_src.zip
CadSurf_src
VKernel
VKGraphic
VKGraphic.dsp
VKGraphic.dsw
VKGraphic.plg
VKGeom
VKGeom.dsp
VKGeom.dsw
cadsurf
CadSurf.clw
CadSurf.dsp
cadsurf.dsw
Thumbs.db
res
bmp00001.bmp
cadsurf.ico
CADSURFDOC.ICO
new_splash.bmp
new_splash.PNG
new_splash_small.bmp
tb_geom.bmp
Thumbs.db
toolbar.bmp
toolbar1.bmp
untitled.bmp
XPStyle.manifest
CadSurf_VS2008.zip
CadSurf
cadsurf
CadSurf.suo
res
bmp00001.bmp
cadsurf.ico
CADSURFDOC.ICO
new_splash.bmp
new_splash.PNG
new_splash_small.bmp
tb_geom.bmp
Thumbs.db
toolbar.bmp
toolbar1.bmp
untitled.bmp
VKernel
VKGeom
VKGraphic
VKGraphic.plg
// GLDisplayContext.cpp: implementation of the CGLDisplayContext class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "CadSurf.h"
#include "GLDisplayContext.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CGLDisplayContext::CGLDisplayContext()
{
}

CGLDisplayContext::CGLDisplayContext(CDocument* pDoc)
{
	display = new CListOfCGLObject;
	erase = new CListOfCGLObject;
	select = new CListOfCGLObject;
	selListIter.SetList(select);
	selListIter.Init();
	ptrDoc = pDoc;
	viewBox.SetLimits(-1, 1, -1, 1, -1, 1);
	mouseSensitivity = 5; //5 pixels sensitivity
}

CGLDisplayContext::~CGLDisplayContext()
{
	if(!display->IsEmpty())
		display->Clear();
	if(!erase->IsEmpty())
		erase->Clear();
	if(!select->IsEmpty())
		select->Clear();
	delete display;
	delete erase;
	delete select;
}

void CGLDisplayContext::Display(const CGLObject* aO)
{
	if(aO == NULL)
		return;
	CGLObject* O = aO->Copy();
	if(display->IsEmpty())
		viewBox = O->GetBoundingBox();
	else
		viewBox.AddBox(O->GetBoundingBox());
	display->Append(O);
	ptrDoc->UpdateAllViews(NULL);
}

void CGLDisplayContext::Erase(const CGLObject* aO)
{
	erase->Append(display->Remove(aO));
}

void CGLDisplayContext::DisplayAll()
{
	CListIteratorOfListOfCGLObject listIter(erase);
	for(listIter.Init(); listIter.More(); listIter.Next())
	{
		CGLObject* eO = listIter.Current();
		if(display->IsEmpty())
			viewBox = eO->GetBoundingBox();
		else
			viewBox.AddBox(eO->GetBoundingBox());
		display->Append(eO);
		listIter.SetCurrent(0);
	}
	erase->Clear();
}

void CGLDisplayContext::DisplaySelected()
{
	if(!HasSelected())
		return;
	EraseAll();
	CListIteratorOfListOfCGLObject listIterD(erase);
	CListIteratorOfListOfCGLObject listIterSel(select);
	CGLObject* eO, *sO;
	for(listIterSel.Init(); listIterSel.More(); listIterSel.Next())
	{
		sO = listIterSel.Current();
		for(listIterD.Init(); listIterD.More(); listIterD.Next())
		{
			eO = listIterD.Current();
			if(eO->GetObjID() == sO->GetObjID())
				break;
		}
		if(display->IsEmpty())
			viewBox = eO->GetBoundingBox();
		else
			viewBox.AddBox(eO->GetBoundingBox());
		display->Append(erase->Remove(eO));
	}
	EmptySelection();
}

void CGLDisplayContext::EraseAll()
{
	CListIteratorOfListOfCGLObject listIter(display);
	for(listIter.Init(); listIter.More(); listIter.Next())
	{
		erase->Append(listIter.Current());
		listIter.SetCurrent(0);
	}
	display->Clear();
}

void CGLDisplayContext::EraseSelected()
{
	if(!HasSelected())
		return;
	CListIteratorOfListOfCGLObject listIterD(display);
	CListIteratorOfListOfCGLObject listIterSel(select);
	CGLObject* eO, *sO;
	for(listIterSel.Init(); listIterSel.More(); listIterSel.Next())
	{
		sO = listIterSel.Current();
		for(listIterD.Init(); listIterD.More(); listIterD.Next())
		{
			eO = listIterD.Current();
			if(eO->GetObjID() == sO->GetObjID())
				break;
		}
		Erase(eO);
	}
	EmptySelection();
	viewBox.SetLimits(-1,1,-1,1,-1,1);
	for(listIterD.Init(); listIterD.More(); listIterD.Next())
		viewBox.AddBox(listIterD.Current()->GetBoundingBox());
}

void CGLDisplayContext::DeleteAll()
{
	if(!display->IsEmpty())
		display->Clear();
	if(!erase->IsEmpty())
		erase->Clear();
	EmptySelection();
	viewBox.SetLimits(-1, 1, -1, 1, -1, 1);
}

void CGLDisplayContext::DeleteSelected()
{
	if(!HasSelected())
		return;
	CListIteratorOfListOfCGLObject listIterD(display);
	CListIteratorOfListOfCGLObject listIterSel(select);
	CGLObject* eO, *sO;
	for(listIterSel.Init(); listIterSel.More(); listIterSel.Next())
	{
		sO = listIterSel.Current();
		for(listIterD.Init(); listIterD.More(); listIterD.Next())
		{
			eO = listIterD.Current();
			if(eO->GetObjID() == sO->GetObjID())
				break;
		}
		delete display->Remove(eO);
	}
	EmptySelection();
	viewBox.SetLimits(-1,1,-1,1,-1,1);
	for(listIterD.Init(); listIterD.More(); listIterD.Next())
		viewBox.AddBox(listIterD.Current()->GetBoundingBox());
}

void CGLDisplayContext::Render(const GLDisplayMode& mode)
{
	if(IsEmpty())
		return;
	CGLObject* O;

	// Initialize the names stack
	glInitNames();
	glPushName(0);
	CListIteratorOfListOfCGLObject listIter(display);
	for(listIter.Init(); listIter.More(); listIter.Next())
	{
		O = listIter.Current();
		if(O)
		{
			glLoadName(O->GetObjID());
			O->Display(mode);
		}
	}
	listIter.SetList(select);
	for(listIter.Init(); listIter.More(); listIter.Next())
	{
		O = listIter.Current();
		if(O)
			O->Hilight(mode);
	}
}

bool CGLDisplayContext::Select(CGLView* aView, const int& x, const int& y)
{
	bool res = false;
	CGLObject* O = 0;
	unsigned long int id = aView->ProcessSelection(x, y, mouseSensitivity);
	if(id)
		res = true;
	else
	{
		EmptySelection();
		return false;
	}
	CListIteratorOfListOfCGLObject listIter(display);
	for(listIter.Init(); listIter.More(); listIter.Next())
	{
		O = listIter.Current();
		if(O)
		{
			if(id == O->GetObjID())
			{
				if(!IsSelected(O))
				{
					select->Clear();
					AddToSelection(O);
				}
				else
					RemoveSelection(O);
			}
		}
	}
	return res;
}

bool CGLDisplayContext::MultiSelect(CGLView* aView, const int& x, const int& y)
{
	bool res = false;
	CGLObject* O = 0;
	unsigned long int id = aView->ProcessSelection(x, y, mouseSensitivity);
	if(id)
		res = true;
	CListIteratorOfListOfCGLObject listIter(display);
	for(listIter.Init(); listIter.More(); listIter.Next())
	{
		O = listIter.Current();
		if(O)
		{
			if(id == O->GetObjID())
			{
				if(!IsSelected(O))
					AddToSelection(O);
				else
					RemoveSelection(O);
			}
		}
	}
	return res;
}

bool CGLDisplayContext::SweepSelect(CGLView* aView, const CRect& swRect)
{
	bool res = false;
	CGLObject* O = 0;
	unsigned long int *id = new unsigned long int[100];
	int no_of_objs = aView->ProcessSweepSelection(swRect, id);
	if(no_of_objs)
		res = true;
	CListIteratorOfListOfCGLObject listIter(display);
	for(listIter.Init(); listIter.More(); listIter.Next())
	{
		O = listIter.Current();
		if(O)
		{
			for(int i = 0; i < no_of_objs; i++)
			{
				if(id[i] == O->GetObjID())
					AddToSelection(O);
			}
		}
	}
	delete [] id;
	return res;
}

bool CGLDisplayContext::IsEmpty() const
{
	return (display->IsEmpty() && erase->IsEmpty());
}

bool CGLDisplayContext::IsDisplayed(const CGLObject* O) const
{
	if(O == NULL)
		return false;
	CListIteratorOfListOfCGLObject li(display);
	return li.IsFound(O);
}

bool CGLDisplayContext::IsErased(const CGLObject* O) const
{
	if(O == NULL)
		return false;
	CListIteratorOfListOfCGLObject li(erase);
	return li.IsFound(O);
}

bool CGLDisplayContext::IsSelected(const CGLObject* O) const
{
	bool b = false;
	if(O == NULL)
		return false;
	CListIteratorOfListOfCGLObject li(select);
	for(li.Init(); li.More(); li.Next())
	{
		if(O->GetObjID() == li.Current()->GetObjID())
		{
			b = true;
			break;
		}
	}
	return b;
}

bool CGLDisplayContext::IsAllDisplayed() const
{
	return erase->IsEmpty();
}

bool CGLDisplayContext::IsAllErased() const
{
	return display->IsEmpty();
}

bool CGLDisplayContext::HasSelected() const
{
	return !select->IsEmpty();
}

void CGLDisplayContext::InitSelected() const
{
	selListIter.Init();
}

bool CGLDisplayContext::MoreSelected() const
{
	return selListIter.More();
}

void CGLDisplayContext::NextSelected() const
{
	selListIter.Next();
}

CGLObject* CGLDisplayContext::CurrentSelected() const
{
	CGLObject* sO = selListIter.Current();
	CGLObject* O = 0;
	CListIteratorOfListOfCGLObject listIter(display);
	for(listIter.Init(); listIter.More(); listIter.Next())
	{
		if(sO->GetObjID() == listIter.Current()->GetObjID())
		{
			O = listIter.Current();
			break;
		}
	}
	return O;
}

//Private
void CGLDisplayContext::AddToSelection(const CGLObject* O)
{
	select->Append(O->Copy());
}

void CGLDisplayContext::RemoveSelection(const CGLObject* O)
{
	CListIteratorOfListOfCGLObject listIter(select);
	for(listIter.Init(); listIter.More(); listIter.Next())
	{
		if(O->GetObjID() == listIter.Current()->GetObjID())
		{
			delete select->Remove(listIter.Current());
			break;
		}
	}
}

void CGLDisplayContext::EmptySelection()
{
	if(!select->IsEmpty())
		select->Clear();
}

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

About the Author

Sharjith
Engineer Tata Technologies Ltd
India India
Sharjith is a Mechanical Engineer with strong passion for Automobiles, Aircrafts and Software development.

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