void DrawPyramid(Vec3 P0,double a,double b,double h){
	//punkte um den ursprungerzeugen
	Vec3 P1=new Vec3(-a/2,-b/2,  0);
	Vec3 P2=new Vec3( a/2,-b/2,  0);
	Vec3 P3=new Vec3( a/2, b/2,  0);
	Vec3 P4=new Vec3(-a/2, b/2,  0);
	Vec3 P5=new Vec3(   0,   0,  h);
	Vec3 normal=new Vec3&(0,0,1);
	//punkte zum gewünschten ort verschieben
	P1=P1+P0;
	P2=P2+P0;
	P3=P3+P0;
	P4=P4+P0;
	P5=P5+P0;
	//die vierdreiecke zeichenen
	glBegin(GL_TRIANGLES);  // Start Drawing A Triangle
	glNormal3dv(normal.p);		// Set Top Point Of Triangle To Red  TODO
	glVertex3dv(P5.p);      // First Point Of The Triangle
	glVertex3dv(P1.p);      // Second Point Of The Triangle
	glVertex3dv(P2.p);      // Third Point Of The Triangle
	glEnd();

	glBegin(GL_TRIANGLES);  // Start Drawing A Triangle
	glNormal3dv(normal.p);		// Set Top Point Of Triangle To Red  TODO
	glVertex3dv(P5.p);      // First Point Of The Triangle
	glVertex3dv(P2.p);      // Second Point Of The Triangle
	glVertex3dv(P3.p);      // Third Point Of The Triangle
	glEnd();

	glBegin(GL_TRIANGLES);  // Start Drawing A Triangle
	glNormal3dv(normal.p);		// Set Top Point Of Triangle To Red  TODO
	glVertex3dv(P5.p);      // First Point Of The Triangle
	glVertex3dv(P3.p);      // Second Point Of The Triangle
	glVertex3dv(P4.p);      // Third Point Of The Triangle
	glEnd();

	glBegin(GL_TRIANGLES);  // Start Drawing A Triangle
	glNormal3dv(normal.p);		// Set Top Point Of Triangle To Red  TODO
	glVertex3dv(P5.p);      // First Point Of The Triangle
	glVertex3dv(P4.p);      // Second Point Of The Triangle
	glVertex3dv(P1.p);      // Third Point Of The Triangle
	glEnd();

	glBegin(GL_QUADS);
	glNormal3dv(normal.p);
	glVertex3dv(P1.p);
	glVertex3dv(P2.p);
	glVertex3dv(P3.p);
	glVertex3dv(P4.p);
	glEnd();


}