Question

I used the following code to display some simple text:

    void output(GLfloat x, GLfloat y, char *format,...)
{
  va_list args;
  char buffer[200], *p;

  va_start(args, format);
  vsprintf(buffer, format, args);
  va_end(args);
  glPushMatrix();
  glLoadIdentity();
  glTranslatef(x, y, -1000);
  for (p = buffer; *p; p++)
    glutStrokeCharacter(GLUT_STROKE_ROMAN, *p);
  glPopMatrix();
}

But I don’t know how could I change/specify the size of the text?

Or is there a better way to do this?

Answer 1

First, please never use vsprintf. And I don’t mean to start using iostream or something; I mean to use vsnprintf. That way, you don’t walk off the end of your character array.

Second, you should be using glutStrokeString to draw a string.

Most importantly, since the GLUT text rendering code uses the current matrix, if you want to change the size of the text, you can just drop a scale matrix into the matrix stack with glScalef. This probably only works with stroked fonts though, which you are using.