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Achieving PostScript and Wmf outputs for OpenGL

, 9 Jun 2003
This article explains how to generate resolution independent versions of 3D meshes rendered by OpenGL/MFC programs, i.e. how to export the rendering results to vectorial formats such as encapsulated postscript (EPS) and Windows enhanced metafile (EMF) formats. The main goal consists of being able to
//********************************************
// SceneGraph.h
// class CSceneGraph
//********************************************
// alliez@usc.edu
// Created : 15/01/98
// Modified : 26/05/98
//********************************************

#ifndef _SCENEGRAPH_3D_
#define _SCENEGRAPH_3D_

#include "Object3d.h"
#include "Texture.h"
#include "Material.h"
#include "Array3d.h"

class CSceneGraph3d
{

private :

	// Datas
	CArray3d<CObject3d> m_ArrayObject3d;
	CArray3d<CTexture>  m_ArrayTexture;
	CArray3d<CMaterial> m_ArrayMaterial;
	GLuint *m_pIndexTextureBinding;
	unsigned int m_ListDone;

public :

	// Constructor
	CSceneGraph3d();
	~CSceneGraph3d();

	// Datas
	void Add(CObject3d *pObject3d);
	void RemoveAt(int index);
	CObject3d *GetAt(int index);
	CObject3d *operator[](int index);
	int NbObject(void) { return m_ArrayObject3d.GetSize(); }
	void Free(void);

	// I/O
	int SaveFile(char *name);
	int SaveFileRaw(char *name);
	int WriteHeader(CStdioFile &file,char *name);

	// Misc
	int BuildAdjacency();
	int CalculateNormalPerVertex();
	int CalculateNormalPerFace();

	// Binding
	void SetNormalBinding(int type);
	void SetColorBinding(int type);

	// OpenGL
	virtual int glBuildList();
	void glDraw(void);
	void glDrawDirect(void);
	void glDraw(int type);

	// Textures
	CArray3d<CTexture> *GetArrayTexture() { return &m_ArrayTexture; }
	int HasTexture(char *name,int *index);
	int NbTexture() { return m_ArrayTexture.GetSize(); }
	int AddTexture(CTexture *pTexture) { return m_ArrayTexture.Add(pTexture); }
	void RemoveAllTexture() { m_ArrayTexture.RemoveAll(); }
	void RemoveTexture(int index) { m_ArrayTexture.RemoveAt(index); }
	CTexture *GetTexture(int index) { return m_ArrayTexture[index]; }
};

#endif // _SCENEGRAPH_3D_

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About the Author

Pierre Alliez

France France
No Biography provided

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