/* Fonts */
//Adapted from code by Nate Robins for tw 

GLvoid * TWFontStyle = GLUT_BITMAP_8_BY_13;

void twSetFont(char* name, int size) {
    if (strcmp(name, "helvetica") == 0) {
        if (size == 12) 
            TWFontStyle = GLUT_BITMAP_HELVETICA_12;
        else if (size == 18)
            TWFontStyle = GLUT_BITMAP_HELVETICA_18;
        else {
            twMessage(TW_FONTS,"Warning, no helvetica font at size %d, using 12\n",size);
            TWFontStyle = GLUT_BITMAP_HELVETICA_12;
        }
    } else if (strcmp(name, "times roman") == 0) {
        if (size == 10) 
            TWFontStyle = GLUT_BITMAP_TIMES_ROMAN_10;
        else if (size == 24)
            TWFontStyle = GLUT_BITMAP_TIMES_ROMAN_24;
        else {
            twMessage(TW_FONTS,"Warning, no times roman font at size %d, using 10\n",size);
            TWFontStyle = GLUT_BITMAP_TIMES_ROMAN_10;
        }
    } else if (strcmp(name, "8x13") == 0) {
        TWFontStyle = GLUT_BITMAP_8_BY_13;
    } else if (strcmp(name, "9x15") == 0) {
        TWFontStyle = GLUT_BITMAP_9_BY_15;
    } else {
        twMessage(TW_FONTS,"Warning:  no font matches %s; using default 8x13\n",name);
        TWFontStyle = GLUT_BITMAP_8_BY_13;
    }
}

void twDrawString(GLuint x, GLuint y, char* format, ...) {
    va_list args;
    char buffer[255], *s;
    
    va_start(args, format);
    vsprintf(buffer, format, args);
    va_end(args);
    
    glRasterPos2i(x, y);
    for (s = buffer; *s; s++)
        glutBitmapCharacter(TWFontStyle, *s);
}

void twDrawString(GLfloat x, GLfloat y, GLfloat z, char* format, ...) {
    va_list args;
    char buffer[255], *s;
    
    va_start(args, format);
    vsprintf(buffer, format, args);
    va_end(args);
    
    glRasterPos3f(x, y, z);
    for (s = buffer; *s; s++)
        glutBitmapCharacter(TWFontStyle, *s);
}