//Color for highlight and normal 
	GLfloat highlightFontColor[3]={1.0,0.0,0.0};
	GLfloat normalFontColor[3]={0.0,0.0,0.0};
//Color for toolbox highlight and normal
	GLfloat highlightToolboxColor[3]={0.0,0.8,0.8};
	GLfloat normalToolboxColor[3]={0.8,0.8,0.8};
//draw icon box
void screen_box(int x1, int y1, int x2,int y2)
{
    
	glBegin(GL_QUADS);
      glVertex2i(x1, y1);
      glVertex2i(x2, y1);
      glVertex2i(x2, y2);
      glVertex2i(x1, y2);
    glEnd();
}

//draw char
void draw_char(unsigned char k,int *x,int *y){
	glRasterPos2i(*x,*y);
	glutBitmapCharacter(GLUT_BITMAP_9_BY_15,k);
	*x+=glutBitmapWidth(GLUT_BITMAP_9_BY_15,k);
}

//draw string
void draw_string(unsigned char *str,int *rx,int *ry){
	unsigned char *p=str;
	while(*p!='\0'){
		draw_char(*p,rx,ry);
		p++;
	}
}
void printMatrix(GLfloat m[16]){
	printf("\n");
	printf("%f,%f,%f,%f\n",m[0],m[4],m[8],m[12]);
	printf("%f,%f,%f,%f\n",m[1],m[5],m[9],m[13]);
	printf("%f,%f,%f,%f\n",m[2],m[6],m[10],m[14]);
	printf("%f,%f,%f,%f\n",m[3],m[7],m[11],m[15]);
}