Figure 65

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Figure 65
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/*
//Author: Cheikh Drame
//To support, please do one of the following
//- Visit irap123.com many times a day
//- Join irap123.com
//- Buy my app irap123 (rhyming dictionary) available for android, and iphone. On windows phone, it is called iLyrics. If not, you can get the desktop version at www.irap123.com/apps/webstore/
//- Include irap123.com in your blogs, forums, facebook walls, email footers, comments
//- send a donation at my paypal address at cbdsigned.vevo@gmail.com
//- Buy a story at http://shop.pparzygnat.com
*/
// stroke.cpp : Defines the entry point for the console application.
//


/* */

/*
* stroke.c
* This program demonstrates some characters of a
* stroke (vector) font. The characters are represented
* by display lists, which are given numbers which
* correspond to the ASCII values of the characters.
* Use of glCallLists() is demonstrated.
*/
#include
#include
#include

#define PT 1
#define STROKE 2
#define END 3

typedef struct charpoint {
GLfloat x, y;
int type;
} CP;

CP Adata[] = {
{ 0, 0, PT}, {0, 9, PT}, {1, 10, PT}, {4, 10, PT},
{5, 9, PT}, {5, 0, STROKE}, {0, 5, PT}, {5, 5, END}
};

CP Edata[] = {
{5, 0, PT}, {0, 0, PT}, {0, 10, PT}, {5, 10, STROKE},
{0, 5, PT}, {4, 5, END}
};

CP Pdata[] = {
{0, 0, PT}, {0, 10, PT}, {4, 10, PT}, {5, 9, PT}, {5, 6, PT},
{4, 5, PT}, {0, 5, END}
};

CP Rdata[] = {
{0, 0, PT}, {0, 10, PT}, {4, 10, PT}, {5, 9, PT}, {5, 6, PT},
{4, 5, PT}, {0, 5, STROKE}, {3, 5, PT}, {5, 0, END}
};

CP Sdata[] = {
{0, 1, PT}, {1, 0, PT}, {4, 0, PT}, {5, 1, PT}, {5, 4, PT},
{4, 5, PT}, {1, 5, PT}, {0, 6, PT}, {0, 9, PT}, {1, 10, PT},
{4, 10, PT}, {5, 9, END}
};

/* drawLetter() interprets the instructions from the array
* for that letter and renders the letter with line segments.
*/
static void drawLetter(CP *l)
{
glBegin(GL_LINE_STRIP);
while (1) {
switch (l->type) {
case PT:
glVertex2fv(&l->x);
break;
case STROKE:
glVertex2fv(&l->x);
glEnd();
glBegin(GL_LINE_STRIP);
break;
case END:
glVertex2fv(&l->x);
glEnd();
glTranslatef(8.0, 0.0, 0.0);
return;
}
l++;
}
}

/* Create a display list for each of 6 characters */
static void init (void)
{
GLuint base;

glShadeModel (GL_FLAT);

base = glGenLists (128);
glListBase(base);
glNewList(base+'A', GL_COMPILE); drawLetter(Adata); glEndList();
glNewList(base+'E', GL_COMPILE); drawLetter(Edata); glEndList();
glNewList(base+'P', GL_COMPILE); drawLetter(Pdata); glEndList();
glNewList(base+'R', GL_COMPILE); drawLetter(Rdata); glEndList();
glNewList(base+'S', GL_COMPILE); drawLetter(Sdata); glEndList();
glNewList(base+' ', GL_COMPILE); glTranslatef(8.0, 0.0, 0.0); glEndList();
}

char *test1 = "A SPARE SERAPE APPEARS AS";
char *test2 = "APES PREPARE RARE PEPPERS";

static void printStrokedString(char *s)
{
GLsizei len = strlen(s);
glCallLists(len, GL_BYTE, (GLbyte *)s);
}

void display(void)
{
glClear(GL_COLOR_BUFFER_BIT);
glColor3f(1.0, 1.0, 1.0);
glPushMatrix();
glScalef(2.0, 2.0, 2.0);
glTranslatef(10.0, 30.0, 0.0);
printStrokedString(test1);
glPopMatrix();
glPushMatrix();
glScalef(2.0, 2.0, 2.0);
glTranslatef(10.0, 13.0, 0.0);
printStrokedString(test2);
glPopMatrix();
glFlush();
}

void reshape(int w, int h)
{
glViewport(0, 0, (GLsizei) w, (GLsizei) h);
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gluOrtho2D (0.0, (GLdouble) w, 0.0, (GLdouble) h);
}

void keyboard(unsigned char key, int x, int y)
{
switch (key) {
case ' ':
glutPostRedisplay();
break;
case 27:
exit(0);
}
}

/* Main Loop
* Open window with initial window size, title bar,
* RGBA display mode, and handle input events.
*/
int main(int argc, char** argv)
{
glutInit(&argc, argv);
glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);
glutInitWindowSize (440, 120);
glutCreateWindow ("stroke by irap123.com");
init ();
glutReshapeFunc(reshape);
glutKeyboardFunc(keyboard);
glutDisplayFunc(display);
glutMainLoop();
return 0;
}