//
// Computergraphik II
// Prof. Dr. Juergen Doellner
// Wintersemester 2001/02
// 
// Rahmenprogramm zu Aufgabenzettel 8
//

#ifndef CG_TWOPART_H
#define CG_TWOPART_H

#include "cgapplication.h"
#include "triangle.h"

class Context;

class CGTwoPart : public CGApplication {
public:
    CGTwoPart(char* filename);
    virtual ~CGTwoPart();

    // Ueberschreibe alle diese Ereignisse:
    virtual void onInit();
    virtual void onDraw();        
    virtual void onIdle();
    virtual void onKey(unsigned char key);    
    virtual void onSize(unsigned int newWidth, unsigned int newHeight);
    
private:
	void readImage();
	void handleVertex(const Vector& v) const;

    // filename of ppm-image
    char* filename_;
    // dimension of texture
    int texWidth_;
    int texHeight_;
    // image for texture
    GLubyte* image_;;
    // texture identifier
    GLuint texName_;

    int size_;
    Triangle* tris_;

	float zoom_;

	// object's center
	Vector center_;

	// mapping methods
	Vector SphereIntersection(const Vector& point) const;
	Vector SphereNormal(const Vector& point) const;
	Vector SphereSurfaceToTexture(const Vector& surface) const;
	Vector CylinderIntersection(const Vector& point) const;
	Vector CylinderNormal(const Vector& point) const;
	Vector CylinderSurfaceToTexture(const Vector& surface) const;
	enum { SPHERE_INTERSECTION, SPHERE_NORMAL, CYLINDER_INTERSECTION, CYLINDER_NORMAL } mapping_;

    // state vars    
    bool stop_;   

};

#endif // CG_TWOPART_H