hay, guys. I got a problem regarding reshapeFcn. Once I use glutReshapeFunc(winReshapeFcn), all the object disappare. Following is my code.

Code :
#include <ostream.h>
#include "glut.h"
 
void main(int argc, char** argv)
{
 
	//Initalize GLUT
	glutInit(&amp;argc,argv);
	initGlut("3D Representations");
 
	//3D initalization
	//Initalize display-window
	initDisplayWnd3D();
	//Initalize projection and view plan
	initView();
	//Send graphics to display window
	glutDisplayFunc(DisplayFcn3D);
 
 
	//reshape function
	glutReshapeFunc(winReshapeFcn);
 
	//Display everything and wait in loop
	glutMainLoop();
}  
 
 
GLint initGlut(char* title)
{
	//window ID
	GLint WndID;
	//Initialize GLUT
	//Set display mode
	glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);
	//Set top-left dislplay-window position
	glutInitWindowPosition(250,300);
	//Set display window width and height
	glutInitWindowSize(400,400);
	//Creat display window
	WndID=glutCreateWindow(title);
	//return WndID
	return WndID;
}
 
 
void initView(void)
{
	//Viewing coordinate origin
	GLfloat x0=100.0,y0=100.0,z0=100.0;
	//Look-at point
	GLfloat xRef=50.0,yRef=50.0,zRef=50.0;
	//View-up vector
	GLfloat Vx=0.0,Vy=0.0,Vz=1.0;
 
	//Clear display window
	glClear(GL_COLOR_BUFFER_BIT);
 
	//Set the viewing parameters
	gluLookAt(x0,y0,z0,xRef,yRef,zRef,Vx,Vy,Vz);
 
	glMatrixMode(GL_PROJECTION);
}
 
 
void initDisplayWnd3D(void)
{
	//Set display-window color to black
	glClearColor(0.0,0.0,0.0,0.0);
	//Clear display window
	glClear(GL_COLOR_BUFFER_BIT);
	//Set projection parameters
	glMatrixMode(GL_MODELVIEW);
	glMatrixMode(GL_PROJECTION);
	glOrtho(-200.0,200.0,-200.0,200.0,-200.0,200.0);
 
}
 
 
 
 
void winReshapeFcn(GLint newWidth,GLint newHeight)
{
	glViewport(0,0,newWidth,newHeight);
	glMatrixMode(GL_MODELVIEW);
	glMatrixMode(GL_PROJECTION);
	glOrtho(-200.0,200.0,-200.0,200.0,- 200.0,200.0);
	glClear(GL_COLOR_BUFFER_BIT);
}
 
 
 
void DisplayFcn3D(void)
{
 
	//Set parameters for a square fill area
	//Set fill color to green
	glColor3f(0.0,1.0,0.0);
	glPolygonMode(GL_FRONT,GL_LINE);
	//Wire-frame back face
	glPolygonMode(GL_BACK,GL_FILL);
 
	glBegin(GL_QUADS);
		glVertex3f(0.0,0.0,0.0);
		glVertex3f(150.0,0.0,0.0);
		glVertex3f(150.0,150.0,0.0);
		glVertex3f(0.0,150.0,0.0);
	glEnd();
 
	//Postion and display wire-frame cone
	glColor3f(1.0,0.0,0.0);
	glPushMatrix();
	glTranslatef(100.0,-50.0,0);
	glutWireCone(50.0,150.0,7,6);
	glPopMatrix();
 
	//Position and display wire-frame sphere
	glColor3f(0.0,1.0,0.0);
	glPushMatrix();
	glTranslatef(50.0,50.0,0);
	glutWireSphere(60.0,8,6);
	glPopMatrix();
 
	glFlush();
}
When I comment the glutReshapeFunc(winReshapeFcn) in the main function, every thing just works fine. So what is wrong with my winReshapeFcn?

Another thing is what kind of library you guys using? Is any difference among gl.h,glu.h and glut.h although I know glut.h includs gl.h and glu.h? Is any more convenient library, object-oriented, available?

Any suggestion and help will be appreciated.