/***************************************************
 * Author: Ting-jen Yen
 *
 * Purpose: Simple illustration of stroke fonts
 *	    Uses the Sierpinski's Gasket example from
 *	    Angel's book, modified to display the words
 *	    "Test".
 *
 *	    Compile with options
 *		-lglut -lGL -lGLU -lXmu -lX11 -lm
 ***************************************************/

#include <GL/glut.h>


/***************************************************
 * myinit
 ***************************************************/
void myinit(void)
{
  /* color attributes */

   glClearColor(1.0, 1.0, 1.0, 1.0); /* white background */
   glColor3f(1.0, 0.0, 0.0); /* draw in red */

  /* set up 500 x 500 window with origin lower left */

   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();
   gluOrtho2D(0.0, 500.0, 0.0, 500.0);
   glMatrixMode(GL_MODELVIEW);
}//myinit

/***************************************************
 * Point data type
 ***************************************************/

  typedef GLfloat point2[2];     

  point2 vertices[3]={
	{0.0,0.0},{250.0,500.0},{500.0,0.0}}; /* A triangle */

/***************************************************
 * display
 ***************************************************/
void display( void )
{

    int i, j, k;
    long random();       /* standard random number generator */
    point2 p ={75.0,50.0};  /* An srbitrary initial point */

    glClear(GL_COLOR_BUFFER_BIT);  /*clear the window */

  /* computes and plots 5000 new points */

    for( k=0; k<5000; k++)
    {
      j=random()%3; /* pick a vertex at random */

     /* Compute point halfway between vertex and old point */

      p[0] = (p[0]+vertices[j][0])/2.0; 
      p[1] = (p[1]+vertices[j][1])/2.0;
	
     /* plot new point */

      glBegin(GL_POINTS);
      glVertex2fv(p); 
      glEnd();
     }//for

  /*  Begin of the changed part */

     glColor3f(0.0, .5,.5); /* change the color */
     glPushMatrix(); /* Store the original transformation matrix */
     glTranslatef(200, 200, 0); /* Translate the coordinate to where we
				   put the characters */
     glRotatef(45., 0., 0., 1.); /* Rotate it a little bit */
     glScalef(0.5, 1.5, 1); /* make some scaling. */
     glutStrokeCharacter(GLUT_STROKE_MONO_ROMAN, 'T'); 
     glutStrokeCharacter(GLUT_STROKE_MONO_ROMAN, 'e'); 
     glutStrokeCharacter(GLUT_STROKE_MONO_ROMAN, 's'); 
     glutStrokeCharacter(GLUT_STROKE_MONO_ROMAN, 't'); 
     glPopMatrix(); /* restore the transformation matrix */

  /* End of the change code */

     glFlush(); /* clear buffers */
}//display

int main(int argc, char** argv)
{

   /* Standard GLUT initialization */

    glutInit(&argc,argv);
    glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB); /* default, not needed */
    glutInitWindowSize(500,500); /* 500 x 500 pixel window */
    glutInitWindowPosition(0,0); /* place window top left on display */
    glutCreateWindow("Sierpinski Gasket"); /* window title */
    glutDisplayFunc(display); /* display callback invoked when window opened */

    myinit(); /* set attributes */

    glutMainLoop(); /* enter event loop */
}//main

/**************** THE END ***********************************/